In the sewage treatment process, aeration of sewage is an important process. The main purpose of aeration in the grit chamber is to make the sewage and gravel swirling, so that the gravel collides and rubs to remove the organic matter on the surface of the gravel, and reduces the subsequent occurrence of the grit. Handling difficulty.
Aerator selection
In the sewage treatment process, aeration of sewage is an important process. The main purpose of aeration in the grit chamber is to make the sewage and gravel swirling, so that the gravel collides and rubs to remove the organic matter on the surface of the gravel, and reduces the subsequent occurrence of the grit. Handling difficulty. In addition, it plays the role of pre-aeration, which is beneficial to the selection and growth of microorganisms. By aeration, the microorganisms in the pool are multiplied to consume organic matter and reduce COD in water.
In order to get a good aeration effect, it is necessary to select a suitable aerator according to the actual situation of the aeration tank.
The parameters that need to be known are: circular pool, diameter and depth of the pool; square pool, length, width and height of the pool. This will tell you the power of the aerator.
There are two types of aerators from aeration, jet aerators and centrifugal aerators. Figure:
Jet aerator centrifugal aerator
The jet aerator can obtain a higher oxygen absorption rate and has the characteristics that the impeller is not blocked. The powerful one-way flow results in an effective convection cycle, with minimal changes in motor load with water level and easy installation.
The jet aerator is mainly composed of a submersible pump, a venturi tube, a diffusion tube, an intake pipe and a silencer. The jet aerator can run normally under the following conditions: 1. The maximum medium temperature does not exceed 40 °C; 2. The pH of the medium is 5-9; 3. The density of the medium does not exceed 1150 kg/m3. Applicable to sewage treatment plant aeration tank, aerated grit chamber, adjustment tank, aerobic tank, biochemical pool, oxygenation and mixing of sewage sludge mixture, biochemical treatment of sewage or culture pond and tap water The plant's aeration can also effectively convert the ferrous ions in the deep well water into ferric ions and then remove the iron ions in the wastewater by using the iron and manganese removal process in deep well water to ensure the waste water. It is clear and translucent, and the equipment can also be connected to the suction pump for high-efficiency mixed contact equipment in multi-effect catalytic oxidation, such as direct ozone generator, pure oxygen machine, blower, etc., such as high concentration wastewater.
Working principle: under the high-speed rotation of the pump impeller, the liquid is ejected from the nozzle at a high speed. When the high-speed flowing liquid passes through the mixing chamber, a vacuum is formed in the mixing chamber, a large amount of air is taken in by the air guiding tube, and the air enters the mixing chamber. After that, it is vigorously mixed with the liquid at the throat to form a gas-liquid mixture, which is discharged by the diffusion tube, and the air rises in the water body with fine bubbles, and an efficient substance transfer is formed throughout the process.
Performance characteristics:
1. Compact structure, small footprint and easy installation.
According to the characteristics of the aeration tank, the size of the sewage treatment and the indicators of the sewage entering the pool can be flexibly selected according to the layout, diving depth and number of units used.
2. High aeration efficiency and wide application range.
Due to its high-speed jet flow state, the liquid-gas mixture is sufficient, the oxygen absorption rate is high, and the power efficiency is high. It is 3 to 4 times more efficient than traditional aeration tanks, and the aeration time can be significantly shortened, and is suitable for various sewage treatments, including push-flow aeration tanks, mixed aeration tanks, delayed aeration tanks, oxidation ditch, Oxidation ponds, etc.
3, the system is simple, no blockage, high reliability.
The utility model is composed of a submersible electric pump and an injection port, so that the water body is stirred and oxygenated simultaneously, and the air bubbles are fine, and the high oxygen transfer rate can be obtained, and the impeller is not blocked. A powerful one-way flow results in an effective convection cycle and the motor load varies little with water level. No need for blowers and other equipment, the system is simple, except for the suction port, the rest is submerged into the water, the noise is small, and the equipment is safe and reliable.
4. Low investment and operating costs.
Because the jet aerator is suitable for deeper aeration tanks, the floor space is reduced, the system is simple, the investment cost is saved, the treatment efficiency is high, and the operation cost is saved.
5, the jet is made of stainless steel "target=_blank> stainless steel, anti-corrosion and durable.
The centrifugal aerator is characterized by a high dissolution rate, no dead zone in the pool, simple structure and investment saving. Easy to install and low noise. Generally used in circular pools.
Nanjing Gulan Environmental Protection Equipment Industry Co., Ltd.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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