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Diaphragm Pump Working Principle

Introduction: The diaphragm pump is a fluid transfer device used in a wide range of industrial and commercial applications and is known for its superior accuracy and reliability. This article will provide an in-depth look at how diaphragm pumps work to help you better understand this engineering tool that plays a key role in a variety of applications.

Principle of operation: Diaphragm pumps work based on the bending motion of the diaphragm, which draws in liquid from the inlet and discharges it to the outlet. Below are the detailed steps in its operation:

Compression of gas: A diaphragm pump usually consists of two diaphragms, which are located at the inlet and outlet ends of the pump. Inside the pump there is an air chamber for controlling the operation of the pump. By compressing air, one diaphragm is bent, thus enlarging the volume of the pump chamber.

Suction of liquid: When one diaphragm is bent, the pressure inside the pump chamber drops, allowing liquid to be sucked into the pump chamber.

Discharge of liquid: When the other diaphragm is compressed and bent, the volume of the pump chamber decreases, which pushes the liquid to be discharged through the outlet.

Cyclic Operation: This process is continuous and is accomplished by alternately compressing the two diaphragms. This cyclic operation produces a continuous flow of liquid.

Advantage:

Accuracy: Diaphragm pumps provide highly accurate flow control for applications that require precise delivery, such as in laboratories and the chemical industry.

Reliability: With no mechanical seals or rotating parts, the diaphragm pump requires relatively low maintenance and has a low failure rate.

Adaptable: It can handle a wide range of liquids, including corrosive liquids, highly viscous liquids and solids in suspension.

Leak-free: the design of the diaphragm pump reduces the risk of leakage and is particularly suitable for applications requiring zero leakage.

Application Areas: Diaphragm pumps are used in a wide range of industries, including but not limited to:

Medical: for the transfer of pharmaceutical solutions, biological products and laboratory samples. Chemical industry: for conveying aggressive chemicals and highly viscous liquids. Food and beverage production: for conveying liquid food ingredients, berries and beverages. Wastewater treatment: for chemical addition and liquid transportation in wastewater treatment processes. Summary: Diaphragm pumps play a key role in a variety of industrial and commercial applications due to their precision, reliability and adaptability. Their simple yet effective operation makes them ideal for handling a wide range of liquids. Whether your application requires precise flow control, corrosion resistance, or a leak-free design, diaphragm pumps are a reliable fluid transfer solution.

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Progressive Cavity Pumps

Analyzing Screw Pumps: The Superior Choice for Fine Liquid Transportation

In the field of liquid transportation, the progressive cavity pump (Screw Pump) with its unique working principle and a wide range of applications attracted much attention. Whether in the industrial, chemical, petroleum, or food processing fields, progressive cavity pumps have shown their excellent performance, providing a reliable solution for the stable transportation of fine liquids.

Basic principle of progressive cavity pumps

The progressive cavity pump is well known for its simple and efficient working principle. It consists of a single helical rotor and a casing in which the helical rotor rotates. Pushed by the rotor, the liquid enters the chamber of the screw from the suction end and is then gradually pushed to the discharge end. This operation is smooth and continuous, with no noticeable pulsation of the liquid. This makes progressive cavity pumps ideal for handling fragile, highly viscous, particulate or gaseous liquids.

Wide range of applications

Progressive cavity pumps excel in several industrial sectors. In the oil and gas industry, they are widely used for the transfer and handling of crude oil and the movement of highly viscous petroleum products. In the chemical industry, progressive cavity pumps are used to transfer a variety of chemicals such as acids and alkalis. The food and beverage processing field also uses progressive cavity pumps to steadily convey slurries, concentrated juices, etc. In addition, progressive cavity pumps are widely used in many fields such as environmental protection, papermaking and sewage treatment.

Advantages and features

The reason why progressive cavity pumps are highly favored is that they have many advantages. First, they are able to handle a wide range of liquids, both highly viscous and with particles. Secondly, due to their stable flow characteristics, progressive cavity pumps do not produce significant pressure fluctuations, which helps maintain production stability. In addition, their relatively simple structure and low maintenance costs enable them to operate stably for long periods of time.

Future Prospects

As industrial technology advances and needs evolve, progressive cavity pumps continue to innovate and improve. Engineers are committed to improving their efficiency, reliability and suitability to meet increasingly complex liquid transfer requirements.

Conclusion

The progressive cavity pump plays an irreplaceable role in industry as a fine liquid transfer device. Its simple but effective working principle, wide range of applications and stable performance make it the first choice in many industries. With the progress of technology, we can expect the progressive cavity pump to continue to play its important role in the future, bringing more innovation and breakthroughs in the field of liquid transportation.

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Double Diaphragm Pump Manufacturer

Introduction: In the field of liquid transportation, double diaphragm pump is a widely used equipment. Its unique working principle and structural design make it the pump of choice in many industries. This article will introduce the definition, working principle and application of double diaphragm pump in various fields to demonstrate its advantages and value in liquid delivery.

Definition of double diaphragm pump: A double-diaphragm pump is an air-driven pump consisting of two diaphragms that separate into two pump chambers. Driven by compressed air or liquid, the diaphragm alternately squeezes the liquid in the pump chamber to realize liquid delivery. It has the characteristics of self-priming ability, no leakage, strong adaptability, etc., and is widely used in various industrial fields.

Second, the working principle of the double diaphragm pump:

Suction phase: When compressed air or liquid enters one pump chamber, the diaphragm is squeezed and the liquid is drawn into the other pump chamber.

Discharge stage: When compressed air or liquid enters another pump cavity, the diaphragm is squeezed and the liquid is discharged into the delivery pipe. Through this alternate suction and discharge process, the double diaphragm pump achieves efficient and stable liquid delivery.

Application field of double diaphragm pump:

Chemical industry: Double-diaphragm pumps are widely used in the chemical industry to transport various corrosive liquids, chemicals and combustible substances, and its material selection and sealing design can adapt to harsh working environments.

Oil and natural gas industry: double diaphragm pumps can be used to transport crude oil, petroleum products, natural gas liquefaction, etc., with the characteristics of corrosion resistance and adjustable flow, and are suitable for various oil and gas processes.

Food and beverage industry: double-diaphragm pumps can be used to transport liquids such as food, beverages, and juices, which meet hygienic requirements and are free from pollution and leakage, ensuring product quality, hygiene and safety.

Sewage treatment industry: double diaphragm

The pump plays a key role in the sewage treatment process. It can transport solid particles and high-concentration sewage. It has the characteristics of self-priming and wear resistance, which effectively solves the problem of pump clogging and the risk of clogging.

Mining industry: Double-diaphragm pumps can be used to transport media containing solid particles such as slurry, ore pulp, ore, and can adapt to harsh working environments and high-pressure requirements.

in conclusion: Double diaphragm pumps are widely used in various industries as an efficient and reliable liquid transfer solution. Its unique working principle and structural design make it have the advantages of self-priming, no leakage, corrosion resistance, etc., and is suitable for handling various media and working environments. Selecting a suitable double diaphragm pump, and carrying out correct installation and maintenance can ensure the safety, stability and efficiency of the transportation process.

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The All-rounder for Every Industry

An air pump is a device driven by gas, which realizes the functions of liquid or solid transportation, pressurization, suction and inflation by compressing air or gas. They are widely used in various industries and become an all-round tool. This article will introduce how air pumps work, their areas of application, and their important role in different industries.

Working principle: The working principle of an air pump is based on the compression and expansion of gas. They generate compressed air or gas via a gas drive (such as an air motor, piston or diaphragm) and deliver it into the working chamber of the pump. In the working chamber, the compression and expansion of the gas produces the working power of the pump, which enables the liquid or solid to be transported, pumped or inflated.

Application fields: Air pumps play an important role in many industries, including but not limited to the following areas:

Pharmaceutical and chemical industry: Air pumps are used to transport liquid and powdery materials such as chemicals, solvents, pigments, coatings and adhesives, etc. They are able to cope with media requirements of different viscosities, corrosiveness and high temperature.

Oil and gas industry: Air pumps are used for pressurization, inflation and suction during oil and gas extraction, transportation and processing. They are able to handle the requirements of high pressure, high temperature and corrosive media, such as oil well fracturing, pipeline cleaning and gas compression, etc.

Sewage treatment and environmental protection engineering: air pumps are used to pump liquids such as sewage, waste water and sludge. They have good clogging and corrosion resistance for high solids content and aggressive media.

Food and beverage industry: Air pumps are used in processes such as filling, conveying and aerating liquids. Due to their hygienic design and choice of materials, air pumps can be used to transport all types of food and beverages such as juices, alcoholic beverages, dairy products and cooking oils.

Construction and mining engineering: air pumps for concrete conveying, spraying and digging

Excavation and other projects. They are able to cope with the requirements of high viscosity, particle content and aggressive media.

Important role: Air pumps play an important role in various industries and have the following advantages:

Good adaptability: the air pump is suitable for conveying requirements of different media, different viscosities and different temperature ranges. They are able to handle a wide range of process conditions and working environments.

High efficiency and energy saving: the air pump has high efficiency and energy saving characteristics. Due to its gas-driven principle, it can be automatically adjusted according to the workload to improve energy utilization.

Reliability and durability: Air pumps are usually designed with a simple structure and no wearing parts, which have a long service life and low maintenance costs.

Safety: The air pump does not need a power source during the working process, avoiding the risk of electric sparks and fires, and is suitable for potentially explosive environments.

To sum up, the air pump is an all-round tool that is widely used in various industries. They play a key role in many processes, including functions such as conveying, pressurization, suction and aeration. With the continuous advancement and innovation of technology, air pumps will continue to develop, providing more efficient, reliable and safe solutions for various industries. Whether in the fields of pharmaceuticals, petroleum, environmental protection or construction, air pumps are indispensable tools that promote the development and progress of industries.

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Chemical Feed Systems

The automatic dosing system is a kind of water treatment equipment using automation technology, which is mainly used for water quality monitoring, disinfection, anti-corrosion and water quality adjustment. It is composed of dosing equipment, sensors, controllers and distribution boxes, etc., through automatic dosing to control the concentration of various chemicals in water to achieve the best water quality effect.

In the field of water treatment, automatic dosing systems are widely used. It can be used in urban water supply, sewage treatment, industrial production and agricultural breeding and other fields. In terms of urban water supply, the automatic dosing system can assist in regulating water quality and ensuring the safety and stability of water supply. In terms of sewage treatment, the automatic dosing system can disinfect the sewage, so as to achieve the purpose of eradicating germs. In industrial production, automatic dosing systems can be used to control the concentration of chemicals used in production, improving production efficiency and product quality. In terms of agricultural breeding, the automatic dosing system can be used in fish pond breeding, livestock and poultry drinking water, etc., to promote the development of aquaculture and resource protection.

There are many advantages to a dynamic dosing system. First, the degree of automation is high, and the concentration of chemicals in water can be stably controlled for a long time. Secondly, the dosage is accurate and precise, which can effectively reduce the waste of chemicals in water. Furthermore, the operation is simple and does not require a lot of manpower and material resources for maintenance, which saves the cost of the enterprise. Finally, the automatic dosing system improves production efficiency and water quality monitoring, which is beneficial to water environment protection and water resource management.

The dosing equipment usually includes a quantitative pump and a chemical box. The chemical box is filled with chemicals, and an appropriate amount of chemicals is added to the water through the quantitative pump. Sensors measure the concentration of chemicals in the water, which feeds back to the controller for adjustment and control. The controller is responsible for controlling the operation of the dosing equipment, controlling the dosage and frequency of the dosing, and ensuring the stable concentration of chemicals in the water. The distribution box is connected to the dosing equipment and the controller, providing power supply and safety protection and other functions.

Advantages of automatic dosing systems include:

The degree of automation is high, and the concentration of chemicals in water can be stably controlled for a long time.

The dosage is accurate and precise, which can effectively reduce the waste of chemicals in water.

It is easy to operate, does not require a lot of manpower and material resources to maintain, and saves the cost of the enterprise.

The production efficiency and water quality monitoring level are improved, which is beneficial to water environment protection and water resources management.

It should be noted that the automatic dosing system should be installed and maintained by professionals, and regularly inspected and maintained to ensure its normal operation and safe use, and to avoid poor water quality and safety problems caused by failures. At the same time, when using the automatic dosing system, it must be operated in strict accordance with the requirements to avoid risks caused by misoperation.

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Liquid mixer agitator

A mixer is a machine in which a shaft with blades rotates in a cylinder or a tank to stir and mix a variety of raw materials to form a mixture or a suitable consistency.

There are many kinds of mixers, such as forced mixers, single-shaft mixers, twin-shaft mixers, etc. Note: The mixer and automatic feeder must be cleaned inside, especially in winter, which can prolong the life. A mixer is a mixer, because the usual function of a mixer is to mix and mix various dry powder mortars, so it is commonly called a mixer.

Filtrate tank stirring device is a commonly used chemical equipment, mainly used for filtering, separating and stirring liquid. The following introduces the characteristics and principle of the filtrate tank stirring device.

1. Features:

1. High efficiency: During the stirring process, the stirring device of the filtrate tank can promote the precipitation of particulate matter in the solution, and filter through the filter screen, so as to realize high-efficiency filtration and separation.

2. Stability: The stirring device of the filtrate tank adopts advanced control technology, which can ensure the stable operation of the equipment and is not prone to failure.

3. Multifunctional: The stirring device of the filtrate tank can perform a variety of different filtration and separation operations, and is suitable for different chemical production processes.

4. Easy maintenance: The structure of the filtrate tank stirring device is simple, easy to maintain and clean, reducing the difficulty and workload of maintenance and cleaning.

5. Energy saving and environmental protection: The filtrate tank stirring device uses advanced filtration technology, which can achieve high-efficiency filtration and separation, reduce waste of energy and resources, and achieve the purpose of energy saving and environmental protection.

2. Principle:

The principle of the filtrate tank stirring device is to settle the particulate matter in the liquid to the bottom of the tank through the action of the stirrer, and then filter and separate through the filter screen.Liquid mixer agitatormain principles are as follows:

1. Sedimentation: Under the action of the agitator, the particulate matter will be dispersed into the solution, and then settle to the bottom of the tank under the action of centrifugal force.

2. Filtration function: the particulate matter that settles to the bottom of the tank is filtered and separated through the filter screen, and the impurities and particulate matter in the liquid are filtered out.

3. Recycling function: The filtered liquid flows back to the filtrate tank and is stirred again to clean the impurities on the filter net and make the filtering effect more perfect.

To sum up, the filtrate tank stirring device is an efficient, stable, multi-functional, easy-to-maintain, energy-saving and environmentally-friendly chemical equipment. Its principle is to achieve liquid filtration and separation through stirring, sedimentation and filtration.

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Solenoid Metering Pump 

The electromagnetic metering pump is a metering pump driven by an electromagnet. Its simple structure, low energy consumption, accurate metering and convenient adjustment make it popular in the industry. The magnetic metering pump uses an electromagnetic push rod to drive the diaphragm in the pump head. The internal reciprocating movement causes the volume and pressure of the chamber of the pump head to change, and the change of pressure causes the opening and closing of the suction valve and the liquid discharge valve, so as to realize the quantitative suction and discharge of liquid. Solenoid-driven metering pumps have a capacity range of 0.74 to 80 l/h and a back pressure of 25 to 2 bar. In order to be able to meter almost all liquid chemicals, ProMinent uses a very wide range of materials.

The solenoid turns the solenoid shaft forward and backward by turning it on and off. This stroke movement is transmitted to a diaphragm in the metering head. Two check valves prevent feed chemical backflow during pumping. But that's not all. Stroke length and stroke rate can be precisely adjusted to vary the metering rate of ProMinent solenoid-driven metering pumps

·Occasions of use are:

·General: dosing of chemicals between 1 ml/h and 80 l/h

·Drinking water treatment: metering of disinfectants

·Cooling circuits: dosing of corrosion inhibitors and biocides

·Wastewater treatment: metering of flocculants

·Paper industry: metering of additives

·Plastic production: metering of additives

Because there is only one moving part, the drive is virtually wear-free. The pump does not require lubricated bearings or shafts; therefore maintenance and repair costs are very low. The continuous operation characteristics are very good.

Electromagnetic metering pumps have a wide range of applications, and can be used in swimming pool water treatment, industrial wastewater treatment, laboratories, etc., and can also be used in power plants, petrochemicals, steel, boiler systems, chemical addition, circuit boards, chemical industry sewage treatment, electroplating and other industries. In addition, it can also be used to add additives in the production process of textile, metal, paper and other industries.

The range of electromagnetic metering pumps includes the Tekna series of electromagnetically driven diaphragm metering pumps designed by SEKO. Electromagnetic metering pumps have two product series, gamma/XL and CONCEPT c, in which the delivery volume range of the gamma/XL product series is 4 ml/h-80 l/h, while the flow rate range of the CONCEPT c product series is 0.72-24 l/h h.

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Ozonator

The ozone generator (system) is mainly composed of: electronic control system, high-voltage discharge body, cooling system, and gas source system.

The ozone generating unit is the most basic component group for generating glow discharge and generating ozone.

The electrode is a conductor that distributes a high-voltage electric field in the ozone generating unit.

Glow discharge: When the electric field strength between two electrodes exceeds a certain value, the electrical conduction phenomenon in the gas is manifested by luminescence.

The dielectric is an insulating medium that does not conduct electricity. In an ozone generating unit, it refers to an insulator located between two electrodes that causes a stable glow discharge.

Dielectric strength The highest electric field strength that the dielectric material can withstand without being damaged. Gas source dew point of the ozone generator, ozone mass concentration, power consumption per kilogram of ozone, cooling method, trouble-free working time, etc. Classification 1 Ozone generators are divided into tube type (G) and plate type (B) according to the structure of the ozone generating unit. 2 Ozone generators are divided into power frequency (50~60Hz), intermediate frequency (400~1000Hz) and high frequency (>1000Hz) according to the discharge frequency. 3 Ozone generators are divided into small (5~100g/h), medium (>100~1000g/h) and large (>1000g/h) according to the ozone output.

Key points for product selection 1) For ozone systems with separate air handling equipment, the air handling equipment and its parameters must be marked separately. 2) The ozone system used for disinfection of swimming pool water should have interlocking protection functions with circulating water pumps, ozone cabinets, and accident alarms. 3) The ozone system used for swimming pool water disinfection should have automatic dosing measures and safety alarm measures, such as: ozone leakage detection and alarm, electrical system short-circuit or overload alarm, cooling water and transformer over-temperature alarm, etc. 4) The ozone content in the swimming pool circulation system can be monitored and controlled online with an ORP probe or an ozone probe. 5) The manufacturer of the ozone generator must provide detailed product information, product certification and industry approval certificates.

Key points of construction and installation 1) The base height of the ozone generator should not be less than 100mm, and the horizontal dimension should be 50~100mm larger than the box size on each side. 2) The operation channel in front of the ozone generator panel should be at least 1000mm wide and 2000mm clear height, and there should be at least one maintenance channel with a width of 500mm on the other three sides, and the height of the machine room should be at least 2200mm. 3) The machine room where the ozone generator is installed should be well ventilated to ensure that the temperature and humidity do not exceed the requirements for the normal operation of the ozone generator. 4) The machine room where the ozone generator is installed should be equipped with an ozone detection device. When the ozone concentration in the air exceeds the standard, an alarm should be issued and the ozone generator should be turned off. 5) The swimming pool water treatment system using an ozone generator (system) should be equipped with an ozone concentration monitoring system in the air by the swimming pool. 6) The ozone generator should have protective grounding measures.

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Industrial Sludge Dryer

The special sludge dryer is an indirect heating low-speed stirring dryer. There are two or four hollow rotating shafts inside the equipment, on which are densely arranged fan-shaped wedge-shaped hollow blades in parallel, and the structural design is particularly ingenious. The shaft body rotates relatively, using the principle and structure of the same angular speed but different linear speed to cleverly achieve the self-cleaning effect of the sludge on the shaft body, and prevent the "shaft holding" phenomenon during the sludge drying process to the greatest extent. Make the sludge rush through the "adhesive phase area" during the drying process at the fastest speed. At the same time, the ingenious structure makes the sludge reach a two-way shear state during the drying process. The dried sludge is quantitatively and continuously sent to the feeding port of the dryer by the screw feeder, and the sludge enters the back of the dryer, and the sludge is turned and stirred by the rotation of the blades, and the heating interface is constantly updated to contact with the body and the blades , is sufficiently heated to evaporate the surface moisture contained in the sludge. At the same time, the sludge is transported in a spiral trajectory with the rotation of the paddle shaft to the direction of the discharge port, and the stirring is continued during the transport, so that the water seeping out of the sludge continues to evaporate. Finally, the uniformly dried and qualified products are discharged from the discharge port. The jacket-type shell structure is adopted, so that the sludge is evenly heated at all interfaces inside the machine, the shaft rotates, the sludge is continuously tumbling in the equipment, and the heating surface is constantly refurbished. Thus, the efficiency of the steaming method of the equipment is greatly improved, the purpose of sludge drying is achieved, and the low-cost operation of the whole set of equipment is realized. There are two main types of sludge dryers: single-channel rotary dryer and hot air rotary vane dryer. Different materials choose different drying processes, and it is very important to choose the correct drying process. The general single-stage drum dryer does not dry according to the characteristics of the material, so that the color of the dried material is poor. Sludge is a kind of material that is not easy to dry, so that the dried material is dry and wet inside, and the dryness and wetness are uneven. The DC vortex plus AC reciprocating fast dryer is used to make the dried material have a good color, save resources and improve economic benefits. The sludge dryer is mainly composed of an induced draft fan, a breaking device, a belt feeder, a feeder, a rotary drum, a heat source, a belt discharger, an unloader and a power distribution cabinet. Therefore, the working area of ​​Wantai sludge dryer includes a discharge area, an inclined lifting plate area, a cleaning area, and a material guiding area.

In the material guide area, the wet sludge enters this area and contacts with high-temperature hot air to quickly evaporate the water. The material is transferred to the next working area if it cannot form a bond under the movement of the copying plate with a large guide angle;

In the discharge area, the drum does not have a lifting plate in this area, and the material rolls and slides to the discharge port in this area to complete the entire drying process;

Cleaning area. The wet sludge is picked up by the lifting board in this area to form a material curtain state. When the material falls, it is easy to form a phenomenon of sticking to the wall of the drum. In this area, because the equipment is designed with a cleaning device, the cleaning device can be cleaned very reasonably. In this process, the cleaning device also breaks up the agglomeration of material pellets, thereby increasing the heat exchange area and improving the drying rate;

In the inclined lifting plate area, the wet sludge has been in a low-moisture loose state in this area, and the material has no bonding phenomenon in this area. After heat exchange, the material reaches the required moisture state and enters the final discharge area. ..River canal sludge with a variety of microorganisms has been ignored by people for a long time, and it has also brought many problems to urban environmental governance. The sludge drying equipment developed by our factory can dry sludge, which is convenient for the production of sludge bio-organic fertilizer. It is the preferred drying equipment for organic fertilizer manufacturers. With the strengthening of the country's economic strength and the improvement of national environmental protection awareness, the urban sewage treatment industry has developed rapidly, and the output of urban sludge has increased day by day. People are increasingly concerned about the disposal and development of sludge. The drying treatment of sludge makes it possible for sludge to be used in agriculture, used as fuel, incinerated, and even to reduce landfill sites.

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What is sludge wastewater treatment?

Sludge treatment is the process of reducing, stabilizing, and harming the sludge through concentration, conditioning, dehydration, stabilization, drying or incineration. The treatment types of sludge treatment include sludge digestion, aerobic digestion, anaerobic digestion, mesophilic digestion, high temperature digestion, sludge concentration, sludge panning, sludge dewatering, sludge vacuum filtration, sludge pressure filtration, sewage sludge Sludge drying, sludge incineration. The existing sludge treatment methods used in sewage treatment plants make the intermediate product of sewage treatment - sludge not properly treated, and the problem of low reuse rate of sludge. In view of this situation, it is urgent to develop a sludge treatment method for sewage treatment plants to meet the needs of practical use. Invention content

The sludge from the sewage treatment plant is first sent to the grid to remove the large suspended solids contained in the sludge, and then the sludge is sterilized, colloid destroyed and water evaporated and dried, so that the sludge is dried. The water content of the sludge is reduced, and then sedimentation through the vertical flow sedimentation tank increases the sedimentation rate of the sludge; the water content in the sludge is reduced to 20-25%. On the one hand, through the contact of impurities in the sludge with the high-temperature flue gas, the moisture on the surface of the sludge evaporates rapidly, which is beneficial to the drying and dehydration of the sludge, and at the same time, it does not cause air pollution. Calcium carbonate (CaSO4) is added to the wastewater for sedimentation in the vertical flow sedimentation tank, which can accelerate the sedimentation of sludge wastewater, reduce the difficulty of work, reduce the workload and difficulty of manual work, and does not affect the biochemical process. The first step, material preparation, first prepare enough hydrochloric acid (HCL), calcium carbonate (CaSO4), alkaline powder and coal ash with a concentration of 30%, and introduce the sludge from the sewage treatment plant into the grid through the suction pipe The net is used to remove the large suspended solids contained in the sludge, and then the large suspended solids are placed in the container one, and the remaining wastewater is introduced into the prepared reactor; The second step, acidification reaction, first pour the waste water in the prepared reactor into hydrochloric acid (HCL) with a concentration of 30% for acidification, stir with a stirrer, stir for 1 to 2 hours, and then add mass Alkaline powder with a percentage of 0.3~4%, mix the alkaline powder with waste water while stirring, and let it stand for 20 minutes. After standing, the upper layer waste water is poured into the reactor, and the sediment at the bottom is placed in a container. Inside; The third step is to dry the sediment. The sediment in the container is contacted with high-temperature flue gas at 110°C to 350°C, and the water on the surface of the sludge evaporates quickly, which is beneficial to the drying and dehydration of the sludge. Sterilization, destruction of colloid and water evaporation and drying, reduce the moisture content in the sludge, increase the drying rate of the sediment, and the dried sludge can be used for planting; The fourth step, vertical flow sedimentation, add 2~5g of calcium carbonate (CaSO4) to the wastewater placed in the reactor, and after stirring for 20 minutes, carry out vertical flow sedimentation tank sedimentation, which can accelerate the sedimentation of sludge wastewater without affecting the Biochemical process, and then add 0.5~3% by mass of coal ash, which is used for adsorption treatment to reduce impurities in the wastewater in the reactor.

A sludge treatment method for a sewage treatment plant according to claim 1, wherein in the first step, the alkaline powder is ferric hydroxide with a concentration of 0.02%.

A sludge treatment method for a sewage treatment plant according to claim 1, characterized in that: in the fourth step operation, the reactor is a tower reactor.

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Sludge Dewatering Methods

Sludge dewatering separates sludge into liquids and solids, minimising the volume of waste and making final disposal easier and more cost-effective. Sludge is a semi-solid slurry produced by various industrial and municipal water treatment processes. Dewatering sludge with sludge dewatering equipment can significantly reduce the weight and volume of sludge before disposal. Before the dewatering process begins, the sludge must pass through any mineral or organic chemicals such as coagulants and flocculants. After conditioning, the sludge is concentrated by dissolved air flotation, gravity belt, thickening drum/spiral drum or centrifuge. Commonly used sludge treatment methods are: concentration, digestion, dehydration, drying, incineration, solidification and comprehensive utilization. Landfills also have Sanitary Landfills as a final disposal method. Once the conditioning step is complete, analysis of the most suitable sludge dewatering technology can begin. The choice of sludge treatment method depends on several factors, including characteristics, volume, time and available disposal options. The benefits of sludge dewatering are: reduction of waste volume, sludge dewatering focuses on reducing weight and volume to minimize waste disposal costs. Therefore, water removal is the primary means of volume reduction until the sludge by-product can be disposed of economically. Dry, high-solids cakes mean lower costs. The use of dewatering equipment is an effective tool for managing sludge build-up, which can reduce transportation and storage costs. Once the sludge is dewatered and the treated water is free of hazards and contaminants, it can be recycled and reused by industry and the community. For example, steam power plants use reclaimed water to provide electricity services to communities. Many people consider filter presses to be labor-intensive equipment. In fact, sludge dewatering filter presses can be automated with automatic cloth washers, mechanically assisted filter cake release and complex control systems that allow communication with the main plant control system. Reduce the amount of waste to a more compact and easier-to-handle size. While the dry cake is disposed of, the reuse of the filtrate reduces the need for new water sources for municipal and industrial wastewater treatment, as well as the overall volume of water required for treatment. There are three main factors that affect the effect of sludge dewatering - sludge properties, sludge dewatering agents and field equipment.

Factors of sludge properties The sludge type and sludge mixing ratio directly affect the sludge dewatering effect and sludge treatment cost, while the moisture content of the sludge cake mainly depends on the properties of the sludge. If the comprehensive moisture content of the sludge is high, it is impossible for any chemical agent or equipment to continuously reduce the moisture content of the sludge cake, and the comprehensive moisture content is mainly determined by the comprehensive properties of the sludge. Therefore, the moisture content of the sludge cake mainly depends on properties of sludge. The properties of sludge mainly depend on factors such as influent water quality, chemical use, treatment process and management.

Factors of dehydrating agent The sludge dewatering agent plays the most important role in the sludge dewatering process. The quality of the sludge dewatering agent directly affects the condition of the sludge, which in turn affects the sludge dewatering effect. Sludge dewatering agent polyacrylamide (PAM) is generally used in sewage plants, because there are many types of PAM, and the degree of selecting different types of polyacrylamide according to the nature, charge type, molecular weight and cation size of the sludge will directly affect the sludge. conditioning, thereby affecting the sludge dewatering effect. The preparation and dosing of medicaments is usually carried out using polymer dosing systems. Generally speaking, the surface of sludge particles in urban sewage treatment plants is negatively charged, so cationic polyacrylamide can be used as a dehydrating agent, and the specific ionicity and molecular weight are determined according to experiments. Sludge dewatering agent not only plays the role of electric neutralization to destabilize the sludge particles, but also plays the role of adsorption and bridging, which accelerates the formation of sludge particle flocculation, increases the flocculation, and improves the separation degree of sludge particles and water.

Equipment factors The operation management of equipment, such as the treatment effect of the centrifuge, will be affected by factors such as operating speed, inlet sludge load, chemical dosage, concentration, and dosage point. If the sludge properties change, the effect may not be ideal without adjusting the operation of the equipment. The low rotation speed of the centrifuge is beneficial to mud curvature, but there are certain limits. The equipment structure of the centrifuge directly affects the treatment effect and the applicability to different sludges, such as aspect ratio, rotational speed, differential adjustment method and sensitivity, and the height of the discharge weir. Therefore, the same sludge is treated with different centrifuges. will produce different processing results.

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Roots Rotary Lobe Blower

Roots-type blower is a positive displacement blower. It relies on the change of the volume of the working chamber formed by the rotation of two involute "8"-shaped rotors to transport gas. Its working principle is the same as that of a gear pump. That is, each rotor is equivalent to a gear with only two teeth. Roots blower, English name Roots blower, is a volumetric rotary blower, a rotary compressor that uses two blade-shaped rotors to make relative motion in the cylinder to compress and transport gas. The blower has a simple structure and is convenient to manufacture, and is suitable for gas delivery and pressurization in low-pressure occasions, and can also be used as a vacuum pump.

Roots blower is a volumetric rotary blower. This compressor maintains the meshing of the two rotors by means of a synchronous gear at the end of the rotor shaft. Each concave curved part on the rotor and the inner wall of the cylinder form a working volume. During the rotation of the rotor, the gas is taken away from the suction port. The gas is backflowed, when the pressure in the working volume suddenly rises, and the gas is then transported to the exhaust channel. The two rotors are not in contact with each other, and they are sealed by a tightly controlled gap, so Roots Rotary Lobe Blower the discharged gas is not polluted by lubricating oil.

Its biggest feature is that when the pressure is adjusted within the allowable range, the flow rate changes little, the pressure selection range is very wide, and it has the characteristics of forced gas transmission. The medium does not contain oil when conveying. Simple structure, convenient maintenance, long service life and small vibration of the whole machine.

vacuum pump. Due to the pulsation of airflow velocity and pressure caused by periodic suction, exhaust and instantaneous isovolumetric compression, large aerodynamic noise will be generated. In addition, the gaps between the rotors and between the rotors and the cylinder cause gas leakage, which reduces efficiency. The exhaust volume of the Roots blower is 0.15~150 cubic meters per minute, and the rotation speed is 150~3000 rpm. The single-stage pressure ratio is usually less than 1.7, up to 2.1, and can be used in multi-stage series

According to the shape of the rotor, the Roots blower is divided into two-blade type and three-blade type. The three-lobed rotor is sucked and exhausted three times by two rotors every time it rotates. Compared with the two-blade type, the gas pulsation is small, the vibration is also small, and the noise is low.

The difference with the centrifugal fan is relatively big:

⒈The working principle is different. The centrifugal fan uses a curved fan blade, and the gas is thrown to the casing by centrifugal force, while the Roots fan uses two 8-shaped fan blades, and the gap between them is very small. to squeeze the gas to the air outlet.

⒉ Due to different working principles, generally their working pressures are different, the outlet pressure of the Roots fan is relatively high, while the centrifugal fan is relatively small.

⒊The air volume is different. Generally, the Roots fan is used in places where the air volume requirement is not large but the pressure requirement is high, while the centrifugal fan is used in the place where the pressure requirement is low and the air volume requirement is large.

⒋The manufacturing precision is different. The Roots blower requires high precision and strict assembly requirements, while the centrifugal blower is relatively loose.

According to the theory of fluid mechanics, the flow process of gas will be accompanied by losses. For example, after the gas flows through the throttling device, the pressure of the gas flow is reduced accordingly, that is, they lose the useful work of the fan. Since all this happens in the process of conveying gas by the fan, the energy of the fan is wasted.

The operating point of the fan is the intersection of the performance curve of the fan at a certain speed and the resistance characteristic line of the pipe network. When the fan is actually running, it does not always stay at the design operating point. It will change with the needs of users or changes in external conditions, that is, the fan is actually working under variable working conditions. In order to make the wind pressure or air volume of the fan reach a certain target value, it is necessary to artificially control the fan or the pipe network, also known as adjustment. Through effective adjustment, it can not only meet the requirements of production on flow or pressure, but also maximize energy saving under the condition that the fan can work stably. In short, the purpose of regulation is to meet performance requirements, expand (stabilize) operating conditions, achieve energy savings, and prevent surges.

Fans can achieve the same purpose with different adjustment methods, but the energy-saving effects are different.

According to theoretical analysis and practical proof, the following four conclusions can be drawn.

(1) For blowers and compressors, the outlet throttling adjustment method consumes the most power. Although the relative flow Qr (the ratio of the actual flow Q to the design flow Q0) decreases, the power also decreases accordingly. For example, when Q=0.65 Q0, the corresponding power is reduced to about 80% of the original, but compared with other adjustment methods, the energy consumption still ranks first.

(2) If the relative flow does not change much (or the adjustment depth is small), the power consumption of several adjustment methods is not very different. That is, the adjustment method has little effect on the energy saving effect, and even not only does not save energy, but consumes more power due to the existence of the adjustment device (such as a hydraulic coupler).

(3) Generally speaking, the greater the adjustment depth, the more significant the energy-saving effect. Therefore, it is necessary to choose the adjustment method carefully in order to obtain the maximum benefit.

⑷ The variable speed adjustment curve is close to the ideal curve. Therefore, the variable speed adjustment method is superior, especially the energy saving scheme that adopts the variable frequency motor speed regulation is the best, but the frequency conversion device needs to be added. It is recommended to actively try out the frequency conversion speed regulation of small and medium capacity; due to the high price of the large capacity and high voltage frequency conversion speed regulation device, it should be combined with the specific situation and comprehensively compared to decide the choice. In short, it is necessary to consider not only the adjustment performance, but also the initial investment, reliability and economy of the equipment, and comprehensively evaluate the advantages and disadvantages of the adjustment method.

Mainly used in sewage treatment, aquaculture, pneumatic conveying, cement, chemical industry, foundry, flour and other national economic sectors.

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Flow meter

The development of flow measurement can be traced back to ancient water projects and urban water supply systems. In the time of Roman Caesar, perforated plates were used to measure the drinking water of residents. Ancient Egypt used the weir method to measure the flow of the Nile around 1000 BC. Our country's famous Dujiangyan water conservancy project application bottle mouth water level observation water quantity and so on. Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology, which is closely related to national economy, national defense construction and scientific research. Do this work, to ensure product quality, improve production efficiency, promote the development of science and technology has an important role, especially in the energy crisis, industrial production automation degree is more and more high in today's era, the status and role of flowmeter in the national economy is more obvious. Flowmeters are divided into differential pressure flowmeters, rotor flowmeters, throttling flowmeters, slit flowmeters, volume flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, turbine flowmeters and vortex flowmeters and so on. According to the medium classification: liquid flow meter, gas flow meter, steam flow meter and solid flow meter The development of surveying can be traced back [3] to ancient water conservancy projects and urban water supply systems. In the time of Roman Caesar, perforated plates were used to measure the drinking water of residents. Ancient Egypt used the weir method to measure the flow of the Nile around 1000 BC. The famous Dujiangweir water conservancy project of our country applies bottle mouth water level observation water flow meter etc. Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology, which is closely related to national economy, national defense construction and scientific research. Do this work, to ensure product quality, improve production efficiency, promote the development of science and technology has an important role, especially in the energy crisis, industrial production automation degree is more and more high in today's era, the status and role of flowmeter in the national economy is more obvious. Flowmeter is divided into differential pressure flowmeter, rotor flowmeter, throttling flowmeter, slit flowmeter, volume flowmeter, electromagnetic flowmeter, ultrasonic flowmeter and weir, etc. Classification by medium: liquid flow meter and gas flow meter. Orifet flowmeter is a differential pressure generating device for measuring flow. It can measure the flow of various fluids in the pipeline with various differential pressure gauges or differential pressure transmitters. Orifice flowmeter throttling device includes annular chamber orifice plate, nozzle, etc. Orifet flowmeter throttling device and differential pressure transmitter matching use, can measure the flow of liquid, steam, gas, orifet flowmeter is widely used in dry petroleum, chemical, metallurgical, electric power, light industry and other departments. When the fluid filling the pipe passes through the throttling device in the pipe, the flow beam will be at the node of the throttling device The flow part forms a local contraction, so that the flow rate increases, the static pressure is low, and the pressure drop is generated before and after the throttle, that is, the pressure difference. The greater the flow rate of the medium flow, the greater the pressure difference before and after the throttle. So the orifice flowmeter can measure the size of the fluid flow by measuring the pressure difference. This measurement method is based on the law of energy balance and the law of continuity of flow. Intelligent throttling device (orifice flowmeter) is a new generation flowmeter that integrates flow, temperature and pressure detection functions, and can automatically compensate temperature and pressure. The orifice flowmeter adopts advanced microcomputer technology and new micro-power consumption technology, with strong function, compact structure, simple operation and easy to use.

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Oil In Water Sensor

The oil sensor in water uses ultraviolet fluorescence method to monitor the oil content in water, and quantitatively analyzes the concentration of oil in water according to the fluorescence intensity of oil and its aromatic hydrocarbon compounds and compounds containing conjugated double bonds after absorbing ultraviolet light. The aromatic hydrocarbons in petroleum can produce fluorescence under the excitation of ultraviolet light, and the oil in the effluent is calculated according to the intensity of fluorescence.

The oil content in water was monitored by UV fluorescence method, and the concentration of oil in water was quantitatively analyzed according to the fluorescence intensity of oil and its aromatic hydrocarbon compounds and compounds containing conjugated double bonds after absorption of UV light. The aromatic hydrocarbons in petroleum can produce fluorescence under the excitation of ultraviolet light, and the value of oil in the water is calculated according to the intensity of fluorescence. Ac driven, effectively filtering natural light interference;

Professional customized optical devices, optical path controllable, effectively avoid turbidity and obstacle interference. When the instrument works, it emits ultraviolet light of a certain characteristic wavelength. When some petroleum substances in the water sample become excited state after absorbing ultraviolet energy, they emit fluorescence when they transition back to the low energy state from the high energy state. This phenomenon is called stimulated emission. The fluorescence wavelength of the stimulated emission depends on the wavelength of the incident ultraviolet ray and the molecular structure of the stimulated emission. According to the intensity of fluorescence in a certain band, the concentration of petroleum substances in water can be calculated. The meter has a detection limit as low as 0.1 PPB and a response time of less than 1 second.

Oil In Water Sensor features:

Using the principle of UV fluorescence analysis, it has high sensitivity and can detect the oil of solubility and emulsification. Optional self cleaning brush, effectively eliminate the impact of oil pollution on the measurement. It is suitable for oil field monitoring, industrial circulating water, condensate water, wastewater treatment, surface water station and other water quality monitoring scenarios.

Digital sensor, with automatic cleaning brush, eliminate the influence of oil on the measurement; Optical and electronic filtering technology is adopted to eliminate the influence of ambient light on the measurement; It is not affected by particulate matter suspended in water.

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Difference between distilled water and pure water

Distilled water is the use of distillation equipment to make water steam, and then the water vapor condensed into water, although remove heavy metal ions, but also remove trace elements needed by the human body, and did not remove low boiling point organic matter. The reason is that these low-boiling organic compounds evaporate and condense back into water as water vapor condenses. Drinking this water for a long time will not only cause the lack of some trace elements, but also drink some organic matter into the body, which is not conducive to health, so it is not suitable for conventional drinking water. The purified water is called pure water, and it is also called space water because it was the first water that astronauts drank. Proper drinking of purified water for normal people is helpful to the microcirculation of the human body, but it is not suitable for long-term drinking, because it not only removes the bacteria, viruses, pollutants and other impurities in the water, but also removes the beneficial trace elements and minerals in the human body, such as calcium and magnesium, which are almost removed. Therefore, long-term drinking will affect the electrolyte acid-base balance in the body, affect the activities of nerves, muscles and a variety of enzymes, especially the elderly and children, if not timely nutrition and calcium, easy to lack nutrition and suffer from calcium deficiency disease. For people who are not overnourished, it is not appropriate to drink purified water for a long time. So difference between distilled water and pure water, and distillation is an important purification method. Distilled water refers to the relatively pure water obtained by distillation, which can generally remove most of the inorganic salts and organic matter in the raw water. The "purified water" on the market, which is also a kind of pure water, is generally filtered to remove larger particulate pollutants and cannot remove inorganic salts. A high-end point will be coupled with a reverse osmosis process to remove most of the inorganic salt. Distilled water is also a common "purified water" on the market. In summary, distillation is a method of purification, and the water obtained by distillation can be called "distilled water". "Pure water" is just a life term, not a technical means, and does not represent the level of water purity. Several technological process of the current domestic production of pure water, natural water, generally is the high and new technology, membrane separation technology, compared with the legal system for water treatment are usually of pure water, the advantage obviously, at room temperature operation, no phase transition, less energy consumption, high separation efficiency, simple operation, and reverse osmosis and ultrafiltration method can remove the colloid, the characteristics of organic matter. Ultrafiltration can basically retain the trace elements useful to human body in natural water, so ultrafiltration is one of the best methods to produce natural water. Purified water is a concept in marketing that aims to give people a sense of purity and inspire people to buy it.