What kind of fan is generally used for sewage treatment aeration fan?

The fan of the sewage treatment plant generally has three main functions: 1. Oxygen supply and aeration 2. Stirring the water body 3. It can add oxygen to biochemical aerobic bacteria, and can prevent precipitation from stirring, backwashing, etc.

Due to the relatively large air volume and relatively high pressure requirements, most of the roots blowers are selected, and the rotary fans and multi-stage centrifugal fans are also useful, because of their own defects, and the pressure and flow range are small, and the market share is not as high as the roots blower. In sewage plants, roots blowers and rotary blowers of Changfeng, Zhanggu and Jingong are more common, mainly because they have a large amount and can stand the test. For the specific model selection, the air volume and pressure can be calculated according to the air-water ratio, water depth, pipeline load, etc., and then determine which fan to use, as well as the specific model and motor power.

Roots blower is recommended for sewage treatment blower, which is easy to maintain and low cost.

Entobo air suspension centrifugal blowerIt has key advantages such as environmental protection and energy saving, no lubrication, and low maintenance cost. It has played a great role in the wastewater treatment process in China. With the maturity of technology, the air suspension blower market cannot be ignored.

As far as products such as blowers, blasting equipment and water pumps are concerned, the application of environmentally friendly and energy-saving equipment with durable efficiency is estimated to save 15-20% of electricity energy, which is very considerable. In the wastewater treatment process, the blower is the key equipment of the blast system, and its electricity consumption accounts for 50 70% of the total sewage treatment. Therefore, the air suspension blower should be born from time to time, quickly occupy the market, and be recognized by customers.

With the acceleration of the modernization system, the amount of sewage in industrial production, living and other industries continues to increase. Sewage treatment has long become the norm in cities, which undoubtedly increases the market demand for air suspension fans and promotes the rapid development of enterprises.

At this stage, wastewater treatment is basically aerated by blast air. Compared with the traditional roots blower, the air suspension blower has more significant advantages in wastewater treatment, and the environmental protection and energy saving effect is more prominent. Priority is given to sewage treatment plants.

This product adjusts the rated power of the motor according to the inverter to maintain the exhaust air volume, and the cooling method is self-cooling of the air inlet, which improves the characteristics of low noise, convenient installation, and no maintenance, which is of key significance for reducing the cost and management cost of the sewage treatment plant.

Generally, the vortex air pump is used, which is cheaper and easy to install, and the most important thing is that it does not need to be maintained, and it is easier to manage. When choosing a vortex air pump, pay attention to its air volume: the purpose of blower aeration is to add enough dissolved oxygen to the water or liquid to meet the oxygen needs of aerobic organisms.

The second is that the pressure should be sufficient: the blower aeration process is the transfer process of molecular mass between the gas and the liquid, in order to make the gas fully diffuse and contact in the liquid and prevent the suspended solids in the liquid from sinking, the aeration blower must be able to generate enough pressure to make the oxygen fully stirred and dissolved in the liquid.

The teakor high-pressure blower, vortex fan, and vortex air pump are generally used to be cheaper than the roots blower, easy to install, stable flow, high efficiency, low energy consumption, small size, and most importantly, maintenance-free.

The selection parameters that should be determined when selecting a fan are: air volume, pressure, motor power, voltage, etc. Parameters can help us to select, if you have the parameters on hand, but do not know how to choose, you can communicate with sales and technical personnel to select for you one-on-one.

Did you have a headache?! I'm still at work.

There are generally two types of fans used for sewage treatment: ARoots fans, especially three-lobe roots fans, are characterized by a wide range of air volume and wind pressure parameters, stable operation, large consumption, and large actual operation noise, which can be reduced by sound insulation cover or muffler; b.

The rotary blower is suitable for small-scale aeration, regulating tank agitation, etc., with small air volume and air pressure, and the disadvantage is that the output air is easy to carry oil. The basis for the selection is mainly based on the air volume and wind pressure, for the 5*5*5 pool, I personally feel that the use of rotary fans can be. The specific flow rate selection should be calculated according to other algorithms such as gas-water ratio or load, and the head should be selected according to the pipeline layout.

Most sewage plants generally choose Changfeng, Zhanggu and Jingong fans, mainly because they have a large amount and can stand the test. In general, please calculate the air volume and head according to other algorithms such as gas-water ratio or load, and select according to the pipeline layout.

That's it.

1. Selection of fan pressure.

The water depth is 5 meters, which can be converted to 50kpa, plus some pressure on the pipeline, then choose a fan with a pressure greater than 50kpa.

2. Air volume. Depending on which aeration equipment is chosen, assuming the selection of a microporous aeration disc with a diameter of 256, the air volume of an aeration disc is, the general spacing of this kind of aeration equipment is 60 cm to install one, you can calculate how many aeration heads are needed in the pool, and the air volume of each aeration multiplied by the number is the required fan air volume. (How much aeration head is needed for the pool, and how much air volume can be calculated by the aeration manufacturer).

3. Lifting pump.

Select according to the traffic corresponding to Yang Cheng.

It's also a good way to learn by asking more about the equipment manufacturer.

The fan mainly depends on the wind pressure and air volume, the wind pressure is calculated according to the water depth and pipeline resistance, the simple way is the maximum water depth +1m, 1m is the approximate pipeline resistance estimate, if you have no experience, you must calculate before doing so, otherwise it is easy to have problems. If you have experience, know the COD value of raw water and the required effluent and the anoxic aerobic process, you can roughly know the gas-water ratio, such as the general domestic sewage ordinary activated sludge treatment to the first-class standard, the gas-water ratio is 10 20:1, according to the local climatic conditions, the maximum temperature is a little smaller, and the temperature is high.

In addition, the speed and power of the fan should also be considered, the former has an impact on noise, and the latter is directly related to operating costs.

The selection of water pump involves the suction lift, head, water volume, anti-corrosion, anti-blocking and convenient maintenance factors. These factors have been taken into account, and it is necessary to find the selection information of more reliable manufacturers.

In fact, the main thing is to be clear about the actual requirements, consider more details, fans and pumps have fixed models, manufacturers have produced them, find the right one for you!

Submersible sewage pumps are commonly used in sewage treatment plants, and if there are requirements for reuse in northern areas, there will also be double-suction centrifugal pumps.

The outlet air pressure of the blower is generally (water depth +1)*, and the extra 10kPa is mainly the head loss of the air pipeline, which will not be carefully calculated in the general design. According to your aeration water depth of 5m, the selected blower outlet air pressure appreciation, the inlet pressure is the standard atmospheric pressure of 98kpa. The flow rate is determined based on the gas volume of the biochemical tank calculated by yourself.

The types of aeration devices in sewage treatment are:

Blower aeration: Use a blower with a certain air volume and pressure to use the connected conveying pipe to forcibly add air to the sewage pool through the microporous air dispersion tray (or microporous gas dispersion pipe), so that the sewage in the pool is in full contact with the air.

Surface aeration: It is to use the motor to directly drive the axial flow impeller to spray the wastewater from the conduit through the water guide plate to the surroundings and form a thin sheet (or droplet-shaped) water curtain, which forms water droplets in contact with the air during the flight, and hits the liquid surface when it falls, and the liquid surface produces turbulence and a large number of bubbles, so that the oxygen content in the water increases.

Submersible jet aeration: The special water pump for aeration design is composed of an inlet duct, a nozzle seat, a mixing chamber and a diffusion pipe, and the water flows into the mixing chamber at high speed through the nozzle seat connected to the pump outlet, and the air is guided to the mixing chamber by the inlet duct and combined with the water flow, and discharged through the diffusion pipe. Also known as jet aerator.

Submersible aeration: The rotation of the impeller directly driven by the motor is used to cause centrifugal force, so that the nearby low pressure sucks in the water flow, and at the same time, the impeller inlet also creates a vacuum to inhale the air, and in the mixing chamber, the air is mixed with water and is rapidly discharged by centrifugal force, which is called a submersible aerator.

The aeration device in sewage treatment involves the technical field of sewage treatment aeration equipment. The aeration device in sewage treatment includes: microporous aeration head, aeration tank bottom, aeration pipe, aeration tank, aeration valve, aeration tank wall, micropores, which are characterized in that:

The microporous aeration head is located in the aeration tank, and the microporous aeration head is connected to the aeration pipe for aeration.

Sewage treatment fans, also known as sewage treatment blowers, have the following main functions.

1. It refers to the oxygen required by microorganisms in the process of environmental protection water treatment biological contact oxidation through the aeration of sewage treatment fan, which is characterized by setting up filler in the pool, and aeration at the bottom of the pool oxygenates the sewage, and makes the sewage in the pool in a flowing state.

2. Ensure that the sewage is fully in contact with the filler immersed in the sewage, and avoid the defect of uneven contact between the sewage and the filler in the biological contact oxidation tank.

Several types of fans are commonly used.

1.Roots blower. If the load requires a constant flow effect, use a roots blower.

Because the roots blower belongs to the constant flow fan, the main parameter of the work is the air volume, and the output pressure changes with the change of the pipe and load, and the air volume changes very little. The roots blower is a high-pressure blower, and the roots blower is a positive displacement blower, which conveys the air volume proportional to the number of revolutions, and transports the gas from the intake side to the discharge.

2.Centrifugal fan. If the load requires a constant pressure effect, a centrifugal fan is used.

Because the centrifugal fan belongs to the constant pressure fan, the main parameter of the work is the wind pressure, and the output air volume changes with the change of the pipeline and load, and the wind pressure does not change much. Centrifugal fan, the wind pressure is not large. The compression of air is usually carried out by centrifugal force through several working impellers (or stages).

Centrifugal fans belong to the square torque characteristic, while roots fans basically belong to the constant torque characteristic.

3.Rotary fan. Roots blower generally speaking, the air volume is relatively large, the pressure is also relatively large, the same roots blower noise is also very large, if the air volume is relatively small, the noise requirements are relatively high, the rotary blower is selected, the rotary blower also belongs to the constant flow fan, the main parameter of the work is the air volume, the output pressure changes with the change of the pipeline and load, the air volume changes very little, the rotary fan is a variable capacity compression, its main characteristics are:

Low speed, low noise, low vibration, high efficiency, high energy saving.

Good domestic brand.

1. Shaanxi Drum (China Famous Trademark), Zhanggu (China's Top 500 Machinery Enterprises), Changfeng (Hubei Famous Brand), Jingong (Shandong Famous Brand Products), Shanggu (Shanghai Famous Brand), Howden, Sanfeng (Hubei Famous Trademark), Jin Tongling (Jiangsu Famous Brand), Wugu (Wuhan Famous Trademark).

2. Long drums, upper drums, chapter drums, brocade work, etc., in view of the reference!! Specifically, you refer to the cost performance.

My side is from Zhangqiu, Jinan, which produces roots blowers, rotary blowers, and oil-free screw blowers.

Generally speaking, which type of blower to choose, the sewage treatment designer will recommend the design for us, and there will be some design parameters, we can use these parameters to procure, no need to worry about the choice of high-pressure fan or roots fan.

The selection parameters that should be determined are: air volume, pressure, motor power, voltage, etc., the parameters can help us to select, if you have the parameters on hand, but do not understand the selection, you can communicate with the sales and technical personnel to select for you one-to-one.

TurboMax Air Suspension Product Features: Air Suspension Centrifugal Blower has the characteristics of energy saving, low noise, oil-free, reliable operation, easy operation and maintenance, and long life.

TurboMax air suspension blower model application range: suitable for sewage treatment industry, food and drug industry, petrochemical industry, cement and building materials industry, power plant and other gas transmission industries.

The TurboMax air suspension blower model adopts an all-in-one compact design, which improves the convenience of installation and operation. Greatly save energy and daily maintenance costs for customers, and provide a clean working environment. Therefore, it has the characteristics of advanced technology, reliable performance, simple structure, small size, energy saving, and convenient maintenance.

1) Air bearing: The self-acting dynamic pressure air bearing with flexible surface support has the characteristics of long operating life, high reliability, good stability, strong bearing capacity and high temperature resistance. It is supported by an air film and does not require lubrication.

Avoid secondary air pollution, almost no power loss, and obvious energy-saving effect.

The presence of coulomb friction inside the dynamic pressure air bearing inhibits the rotor vibration, and the rotor amplitude is less than.

The rotor has passed 100,000 start-stop tests and is a semi-* bearing in the true sense.

2) Impeller: The impeller is made of ultra-high strength aluminum alloy, which can achieve stable operation at ultra-high speed.

The five-axis machining center is made of precision machining, using the ternary design concept, the impeller variable efficiency reaches 87%, and the impeller has passed the 115% overspeed experimental test.

3) Permanent magnet synchronous high-speed motor: Using advanced motor technology, the motor efficiency can reach 95 97%. Stepless speed change, high efficiency and energy saving, simple overall structure, high power density, large amplitude modulation range, strong overload capacity and high reliability.

4) Automation system: using motor and inverter speed control system, PID automatically adjusts the air volume and pressure, so that the fan can reach the most economical operation state within the working range.

The control system performs self-test on speed, wind pressure, air volume, temperature, etc., and has the functions of anti-surge and alarm automatic shutdown. The panel control is easy to operate, all data is clear at a glance, and it has manual and automatic operation functions.

The control system completes the no-load start through the venting device and thrust plate, and realizes the safe shutdown in the case of power failure and alarm.

Guangzhou Baoli Jiejie water treatment****.

Mr. Wang: 13802771461