Industrial specialized submersible four sided centrifugal aerator with large oxygenation capacity

Industrial specialized submersible four sided centrifugal aerator with large oxygenation capacityMain scope of application:

1. Deep water aeration;

2. SBR biochemical tank aeration and agitation;

3. Nitrification or denitrification biochemical aeration and mixing;

4. Sludge aeration and mixing;

5. High organic wastewater treatment process.

Structural characteristics of QXB submersible centrifugal aerator:

1. Self weight positioning, easy installation, can be freely arranged without interrupting process operation
2. Compact design structure, utilizing self-priming function without the need for external air source;
3. The diving operation of the host reduces the footprint and produces low noise;
4. It can be directly used in the oxidation pond, saving infrastructure costs;
5. Independently movable aeration device with stirring function during aeration;
6. The chassis can be specially designed according to user requirements.

The water flow generated by the submersible pump passes through the nozzle to form a high-speed water flow, and negative pressure is formed around the nozzle to suck in air. It mixes with the water flow in the mixing chamber and generates a water gas mixture flow in the horn shaped diffusion tube, which is sprayed out at high speed. The water flow carrying many bubbles vortices and stirs in a large area and depth of water to complete aeration, and its shaft power does not change with the depth of diving. The air intake can be adjusted. Because of this, jet aerators can be applied in pools with significant changes in water level.

How to reduce the wear and tear of centrifugal aerators to improve their service life

Regarding how to reduce the wear and tear of centrifugal aerators and improve their service life:

To reduce the wear of the mixer, it should be maintained and kept from the break in period. The common malfunction of the mixer during the running in period is poor lubrication. The new assembly components have very small gaps between them, and due to assembly and other reasons, it is difficult to ensure the uniformity of the gaps. Lubricating oil is not easy to form a uniform film to prevent friction surface wear. In order to reduce the influence of lubrication, which leads to early abnormal wear of parts. The precise coordination that causes severe friction surface abrasion or wear, leading to malfunction.

Due to factors affecting the processing, assembly, and adjustment of mechanical parts, such as the small contact area of the friction surface and uneven surface pressure. At this point, overloading operations may cause damage to components and early failures. Therefore, when using a centrifugal aerator during operation, it should not be used for work overload, which will greatly reduce the service life of the centrifugal aerator. So we need to pay attention to and maintain it.

Industrial specialized submersible four sided centrifugal aerator with large oxygenation capacityKey Features:

1. Immersion jet aerator has a compact structure, small volume, and easy installation. The aerator consists of three parts, including a sewage pump, an aeration device, and an intake pipe, and has the advantages of compact structure and small footprint. In addition, the aerator has two installation methods, which are easy to install and maintain.

2. Immersion jet aerator has high aeration efficiency and a wide range of applications. Due to its high-speed jet flow state, the liquid mixture has a high absorption rate and high power efficiency. Compared with traditional aeration tanks, its treatment efficiency is 4 to 3 times, and the aeration time can be shortened. It is suitable for various sewage treatments, including push flow aeration tanks, mixed aeration tanks, delayed aeration tanks, oxidation ditches, oxidation ponds, etc.

3. Immersion jet aeration system is simple and reliable. No fan or other equipment, simple system, except for the entrance and rest that are submerged in water and operate with low noise; The aerator is selected with a special cutting submersible sewage pump, which is unobstructed, safe and reliable, and has a long service life.

4. The investment and operating costs of submerged jet aerators are low. Jet aerator is suitable for deep aeration tanks

Selection method of submersible centrifugal aerator:

1. Flow rate is one of the important performance data for selecting a centrifugal aerator, which directly affects the production and transportation capacity of the entire device. If the design process can calculate the normal, small, and three flow rates of the centrifugal aerator. When choosing a centrifugal aerator, the flow rate should be taken as the basis, while considering the normal flow rate. When there is no flow rate, it is usually 1.1 times the normal flow rate can be taken as the flow rate.

2. Head is another important performance data for selecting a centrifugal aerator, and generally needs to be selected by enlarging the margin by 5% to 10% before selecting the head.

3. The properties of liquids include the name of the liquid medium, physical properties, chemical properties, and other properties. Physical properties include temperature c, density d, viscosity u, diameter of solid particles in the medium, and gas content. This involves the head of the system, calculation of effective cavitation allowance, and appropriate pump type. Chemical properties mainly refer to the chemical corrosiveness and toxicity of the liquid medium, which are important criteria for selecting pump materials and choosing the type of shaft seal.

4. The pipeline layout conditions refer to the liquid delivery height, distance, direction, suction side liquid level, discharge side liquid level, and other data, as well as pipeline specifications and their lengths, materials, pipe fittings specifications, quantities, etc., in order to calculate the comb head and verify the cavitation allowance.

5. There are many operating conditions, such as the operation of liquid T, saturation vapor force P, suction side pressure PS, discharge side container pressure PZ, altitude, environmental temperature, whether the operation is intermittent or continuous, and whether the pump position is fixed or movable.

Installation method of QXB submersible centrifugal aerator:

1. Under geographical conditions, the water pump should be located as close as possible to the water source to reduce the length of the suction pipe. The foundation of the water pump installation site should be firm, and a specialized foundation should be built for fixed pump stations.

2. The inlet pipeline should be sealed reliably and must have dedicated support. It cannot be hung on the water pump. The inlet pipe equipped with a bottom valve should be installed as perpendicular to the horizontal plane as possible, and the angle between the axis of the bottom valve and the horizontal plane should not be less than 45 degrees. When the water source is a channel, the bottom valve should be higher than the water bottom by more than 0.50 meters, and a mesh should be added to prevent debris from entering the pump.

3. The base of the machine and pump should be level, and the connection with the foundation should be firm. When the machine and pump are driven by belts, the tight edge of the belt should be at the bottom, which increases the transmission efficiency. The direction of rotation of the water pump impeller should be consistent with the direction indicated by the arrow; When using coupling transmission, the machine and pump must be coaxial.

4. The installation position of the water pump should meet the requirement of allowing the suction height to be reached, and the foundation must be horizontal and stable to ensure that the rotation direction of the power machinery is consistent with that of the water pump.

If there are multiple units in the same computer room, there should be a distance of at least 800mm between each unit and between each unit and the wall.

6. The suction pipe of the water pump must be well sealed, and bends and gate valves should be minimized as much as possible. When filling and diverting water, the air should be completely discharged. During operation, there should be no accumulation of air in the pipe. The suction pipe should be slightly inclined upwards and connected to the inlet of the water pump, and the inlet should have a certain submergence depth.

Necessary preparations before use:

(1) It is necessary to carefully read the instruction manual to avoid damaging the machine due to improper use. Carefully check whether the selection of the submersible aerator is correct and whether the actual usage conditions are consistent with the specified usage conditions.

(2) Clean the water tank or waterway to prevent debris from entering the aeration port.

(3) An electrician should use a 0-500V megohmmeter to check that the insulation resistance of the three core wire of the motor main cable to ground is not less than 5 megohms. It is strictly prohibited to use a megohmmeter to check the control cable to avoid damaging the electrical components inside the aerator. Instead, a multimeter should be used to check the control cable.

(4) The voltage must be checked within the range of ± 5% of the rated voltage indicated on the nameplate. If the power supply is far away from the use of the submersible aerator, considering line loss, the cross-sectional area of the cable should be increased, the number of joints should be minimized, and the joints should be sealed to prevent water leakage; In addition, considering the convenience of maintenance and repair, it is recommended to set up a terminal box next to the machine.

(5) The power cables, grounding wires, and control cables on the submersible aerator should be connected to the wiring heads of the control cabinet (box) one by one.

(6) The submersible aerator is equipped with a dedicated control cabinet. Before use, carefully read its instructions and check whether the equipment wiring is correct, whether the starting device is flexible, whether the contact is good, whether the metal shell of the starting equipment is reliably grounded, check whether all wiring is loose, and tighten it again.

(7) The grounding wire of the submersible aerator is a two-color wire (yellow/green). To ensure safety, it must be securely connected and 50mm longer than other wires.

Precautions for the operation of submersible aerators:

The submersible centrifugal aerator is equivalent to the heart of the sewage treatment system, and its normal operation directly affects the stability of the sewage treatment system. To ensure the normal operation of the submersible centrifugal aerator, the following four aspects should be emphasized:

1. Ensure good ventilation in the machine room of the submersible centrifugal aerator. Submersible centrifugal aerator is a major energy consumer in sewage treatment systems, and it generates heat during operation. If its temperature cannot be diffused in a timely manner, especially in summer, it can cause the temperature of the submersible centrifugal aerator to rise too high. This not only affects the lifespan of the electric motor, but in severe cases, it can also cause the submersible centrifugal aerator to shut down due to insufficient power. If necessary, air conditioning can be used to cool down and solve the problem of temperature rise in the submersible aerator fan.

2. During daily management, it is necessary to regularly check the inlet and outlet air pressure of the blower. If the inlet air pressure is too low, the inlet filter should be cleaned or replaced in a timely manner. If the outlet air pressure is too high, the outlet pipeline should be checked. The cause may be blockage of the aerator microporous membrane or water accumulation in the air pipeline. Cleaning the microporous membrane or draining the water in a timely manner can solve the problem.

3. The exhaust temperature of the blower should be controlled, especially in summer. Excessive exhaust temperature can not only cause an increase in fan temperature, but also affect oxygen filling. It can generally be prevented by exposing and preventing direct sunlight.

4. Pay attention to lubrication and maintenance, strictly follow the operating and maintenance procedures required by the submersible centrifugal aerator manufacturer, regularly inspect and replace lubricating oil in a timely manner.