1. Description
The cooling water self-cleaning filter is a treatment means for the water purification process of sewage treatment equipment. When the water enters the self-cleaning filter from the water inlet, it first filters out the impurities of large particles through the coarse filter element assembly, and then reaches the fine filter screen. After filtering out the impurities of small particles through the fine filter screen, the clean water is discharged from the water outlet. In the filtration process, the impurities in the inner layer of the fine filter screen gradually accumulate, and a pressure difference is formed on the inner and outer sides of it. When the pressure difference reaches the preset value, the automatic cleaning process will begin: the blowdown valve will be opened, and the hydraulic motor chamber and hydraulic cylinder of the main pipe assembly will release the pressure and discharge the water; The pressure in the hydraulic motor room and the sewage suction pipe decreases greatly. Due to the negative pressure, the dirt on the inner wall of the fine filter screen is absorbed through the suction nozzle, flows into the hydraulic motor room by the hydraulic motor, and is discharged by the blowdown valve to form a sewage suction process. When the water flows through the hydraulic motor, the sewage suction pipe is driven to rotate, and the sewage suction pipe is driven to move axially by the piston of the hydraulic cylinder. The inner surface of the whole filter screen is completely cleaned by the combination of axial movement and rotary movement. The whole cleaning process will last for tens of seconds. The blowdown valve is closed at the end of cleaning. The increased water pressure will return the hydraulic cylinder piston to its initial position, and the filter begins to prepare for the next flushing cycle. In the cleaning process, the normal filtering work of the filter is uninterrupted.
2. Tech Parameter
| Filter micron | 100-3000μm
|
| Working temperature | ≤150℃
|
| Working pressure | 0.6 , 1.0, 1.6Mpa |
| Shell material | Carbon steel , Stainless steel |
| Control way | Manual , Time , Pressure difference |
| Connection size | DN50-DN1200 |
| Water treatment | Cooling water |
| Clean way | Automatic |
3. Application
**Iron and steel: used for water treatment and filtration of raw material yard and sintering pellet plant, cooling water filtration of blast furnace, rolling mill and other systems, and impurity filtration of high-pressure water phosphorus removal system.
**Automobile: coating production line is widely used in automobile, tractor, motorcycle, engine manufacturing, water treatment system.
** Power plant: it is used for the precision pretreatment part of the preparation of high-purity water in the boiler of the power plant, and the filtration of generator cooling water and sealing water. When the water consumption of series 13-4 is very large, it can be used as side filtration treatment.
**Petrochemical industry: the side filtration treatment is carried out in the circulating water plant, and the main treatment can be carried out by single machine or multiple models in parallel, instead of filter material filtration, so as to reduce the filter load of filter material, avoid a large amount of flushing water consumption and save costs.
**Agricultural gardens and paper mills: in the system with nozzles and nozzles, the equipment blockage and wear caused by impurities should be reduced. Therefore, it is necessary to select high-precision and automatic filtering products, machinery, food or other automatic and accurate filtering products for the system to prevent the blockage of cooling water system.
