Performance parameters of QXB centrifugal aerator with filter screen

Performance parameters of QXB centrifugal aerator with filter screenStructure and Process

The deep water aeration mixer consists of a submersible motor, reducer, impeller, mixing chamber, base, and intake pipe.

The impeller of the deep water aeration mixer rotates in the mixing chamber and is sucked in compressed air. Due to the special structure of the impeller and the relative rotation of the mixing chamber, air is cut into small bubbles, while water is sucked in and the air that is chopped is mixed, passing through the liquid mixture in the mixing chamber in the horizontal direction. Therefore, microbubbles are uniformly filled with liquid, increasing the surface contact between gas and liquid, improving the efficiency of the aeration system, forming a large communication area, and creating a highly turbulent gas-liquid jet, greatly improving the oxygen transfer rate and oxygen degree of freedom.

Working principle of QXB submersible aerator:

QXB type self-priming aeration, direct connection structure. The centrifugal force generated by the rotating impeller creates negative pressure at the inlet of the impeller to suck in air and water. The kinetic energy of the impeller is used to mix a certain proportion of air and water in the mixture. Under strong centrifugal force, the two-phase flow of air and water is rectified along the tangential direction of the impeller through the flow channel, and then diffuses in the circumferential direction. The fine tiny bubbles are fully mixed with the water melting table, thus achieving the effect of oxygenation and aeration.

Main 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.

Characteristics of QXB centrifugal aerator:

1. Compact structure and small area;

2. Open structure, unobstructed;

3. High transmission efficiency, mixed soft uniform;

4. Small gas pressure loss and low energy consumption;

5. Adjust the intake volume according to the process requirements;

6. The motor protection function is complete, the sealing is reliable, and it is easy to achieve automatic control;

7. Installation, maintenance, and upkeep are simple and convenient.

Solution to crawling phenomenon of submersible aerator

According to their different principles and purposes, Du'an Environmental Protection submersible aerators can be divided into two types: submersible jet aerators and submersible centrifugal aerators. Submersible aerators are used for aeration and mixing in the aeration tanks and aeration sedimentation tanks of sewage treatment plants. They are used to oxygenate and mix the mixture of sewage and sludge, perform biochemical treatment or aquaculture oxygenation, and maintain landscape water. In addition, submersible jet aerators can also be used in the early stage of the tap water process for iron and manganese removal, as well as in the water replenishment cycle process for high-rise buildings.

The hydraulic system of the submersible aerator is the fundamental cause of hydraulic system crawling failure. When air is mixed into oil, a portion of it dissolves in the pressure of the oil, and the remaining is the formation of free bubbles floating on the pressure oil. Because the air is greatly compressed, the fluctuation of dynamic load causes the oil pressure to fluctuate, resulting in a significant change in the feed amount of the actuator and causing gas expansion or contraction, which connects the "rigid" link to the "elastic" link and leads to creep.

To prevent air from entering the hydraulic system, the pipe joints must be tightened to prevent nuts. Try to keep the inlet and outlet pipes as far away as possible to ensure that the inlet and outlet pipes do not interfere with each other, and use partitions to separate them from the inlet and outlet pipelines. The detailed explanation of deodorization technology for wastewater treatment equipment is to remove dirt or replace the oil filter screen. It has sufficient capacity to ensure smooth filtering, add enough lubricating oil to the oil, regularly check, and keep the oil not less than the indicator line oil mark to prevent the system from inhaling air. Utilizing the low viscosity of oil to reduce flow resistance and ensure smooth and abundant oil flow, avoiding cavitation and gas permeation in hydraulic oil.

Working principle of QXB centrifugal aerator oxygenation:

1. The electric motor drives the underwater impeller to rotate, lifting and spraying water into the air to form small water droplets, which carry oxygen back to the lake.

2. The enormous torque of the underwater impeller drives large-scale water flow and causes significant disturbance to the surface water caused by the fountain, providing a high oxygenation rate for the water and possessing the fluidity characteristics of active water.

3. Adequate oxygen maintains the balance of nutrients in water bodies to control the accumulation of sediment and silt.

4. In the form of water convection, during the vertical circulation process, the surface water exchanges with the bottom water, fresh oxygen is input into the lake bottom, and exhaust gas is mixed and released onto the surface of the water body, forming an aerobic microbial community at the lake bottom. This can effectively prevent anaerobic digestion and greatly reduce the odor of decay.

5. Surface hot water bodies have higher anaerobic properties, while lake water with lower bottom temperatures is transported to the surface, inhibiting the growth of algae on the water surface

Performance parameters of QXB centrifugal aerator with filter screenSelection method:

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.

Instructions for using the Du'an QXB submersible centrifugal aerator:

Before starting the submersible aerator, a qualified electrician should inspect the system to ensure that the following electrical protection measures are taken.
Before operating the submersible aerator, use a 0-500V megohmmeter to check the insulation resistance of the motor stator winding to ground, which should not be lower than 1 megohm.
2. The power supply voltage must be within the range of ± 5% of the rated voltage indicated on the nameplate, and the increase in power supply voltage is not allowed to exceed 10% of the rated voltage. If the power supply is far away from the place where the submersible aerator is used, the cross-sectional area of the cable should be thickened, and the joints should be as few as possible, otherwise the voltage will drop too much, and the joints should be sealed and waterproof.
In a four core cable, the ground wire is usually a yellow green wire. To ensure safety, the ground wire must be firmly connected and 50mm longer than other wires.
4. Check the rotation direction of the impeller
The submersible aerator using three-phase power supply should be checked for rotation direction after initial start-up or each reinstallation. Incorrect movement direction can reduce efficiency and damage the water pump.
The inspection method is that before the final installation of the submersible aerator, it should be lifted high and simply started. Looking up at the suction port of the submersible aerator from the bottom, the impeller should rotate counterclockwise. If several submersible aerators are connected to a controller, each submersible aerator must be inspected separately. If the rotation direction is incorrect, the position of any two of the three-phase wires on the controller can be exchanged to change the rotation direction.

Precautions for QXB submersible centrifugal aerator:

1. If there is any minor malfunction with the water pump, remember not to let it work. If the packing of the water pump shaft is worn out, it should be added in a timely manner. Continuing to use the water pump will cause air leakage. The direct impact of this is an increase in motor energy consumption, which can damage the impeller.

2. If the water pump experiences strong vibrations during use, it is necessary to stop and check the cause, otherwise it will also cause damage to the water pump.

3. When the bottom valve of the water pump leaks, some people will fill dry soil into the inlet pipe of the water pump and flush water to the bottom valve, which is not advisable. Because when dry soil is placed into the inlet pipe and the water pump starts working, it will enter the pump and damage the impeller and bearings, which shortens the service life of the water pump. When the bottom valve leaks, it must be taken for repair. If it is serious, it needs to be replaced with a new one.

4. After using the water pump, it is necessary to pay attention to maintenance. For example, when the water pump is used up, the water in the pump should be drained, and the water pipe can be removed and rinsed with clean water.

5. The tape on the water pump should also be removed, washed clean with water, and dried in a well lit place. Do not place the tape in a dark and damp place. The tape of the water pump must not be stained with oil, and do not apply any sticky substances on the tape.

Carefully check whether there are cracks on the impeller and whether there is any looseness in the impeller fixed on the bearing. If there are cracks or looseness, they should be repaired in a timely manner. If there is soil on the impeller of the water pump, it should also be cleaned up. Unable to start, first check the power supply situation: whether the connector is securely connected; Is the switch contact tight; Is the fuse blown; Whether the three-phase power supply is equal or not. If there is a circuit break, poor contact, blown fuse, or phase loss, the cause should be identified and repaired in a timely manner. Next, check if it is a mechanical failure of the water pump itself. Common causes include: too tight packing or blockage between the impeller and the pump body due to debris; The pump shaft, bearings, and leakage reducing ring are rusted; The pump shaft is severely bent, etc. Exclusion method: Loosen the filling material and unclog the drainage channel; Disassemble the pump body to remove debris and rust; Remove the pump shaft for calibration or replace it with a new pump shaft.

After sales instructions of Du'an Environmental Protection Equipment (Jiangsu) Co., Ltd.:

1. Logistics and Freight Description

Submersible sewage pumps, submersible mixers, and other heavy goods can be shipped by express delivery from Jiangsu, Zhejiang, and Shanghai for products weighing less than 50KG. For products weighing more than 50KG, logistics is required. Comprehensive protectors, water leakage protectors, and thermal protectors will be delivered to your doorstep by express delivery. We have dozens of reputable logistics companies that we cooperate with, and we will select the fastest logistics for you. We can prepay or collect the shipping fee, and we will explain it before quoting.

2. Online ordering

Our company is vigorously developing online business and welcomes you to place orders online. We provide double protection for you, including contractual constraints and confirmation of payment.

3. Maintenance and upkeep.

All products of our company come with a one-year warranty; If there is a quality problem within 3 months, the seller shall bear the round-trip repair shipping cost; If there are quality problems within one year, both parties shall bear half of the shipping cost. Please be informed. If it is not a quality issue after inspection, the buyer needs to pay for the repair cost and round-trip shipping. We promise to only charge a cost fee for the replaced parts. We implement lifelong maintenance.