ICM full-automatic backflush filter, Shanghai Weixiu Filtering Equipment Co., Ltd Telephone: 021-50117775

Application Scope

Industrial recirculated water: recirculated water, condensed water and cooling water for blast furnace, rolling mill and conticaster in iron and steel industry.

Filtering of raw water: sea water desalination, processing of river water and surface water.

Environmental protection: pre-filtering of bag filters, strainer core filters, UF filters and RO membrane filters.

Paper industry: raw water and white water filtering, nozzle protection.

Filtering of central air conditioning system, petroleum and chemical, automobile manufacture.

Design Features of the ICM Filter

The filter applies full-automatic continuous filtering, meeting automatic operation requirements.

The filter is electrically driven. The reduction motor drives the brush type cleaning system to clean impurities on the filter screen automatically, maintaining the filtering function of the filter screen.

PLC control function: pressure difference cleaning, timing cleaning, manual cleaning; The pressure difference cleaning is superior to other methods. The filter can be connected to the central control room.

The excellent filtering effect of the filter has been proved. The filter adopts stainless steel wedge type filter screen which provides excellent cleaning effect and is wear-resistant.

The filter can replace the traditional bag filter, basket filter, strainer core filter, vibrating screen filter, frame filter and stainless steel filter in various fields.

Structure and Working Principles of the ICM Filter                                                                                   

The ICM full-automatic brush type self-cleaning filter is comprised of reduction motor, filter shell, filtering elements, brush type combined cleaning system, PLC controller and blow-off valve.

Raw materials enter the filter through the inlet and are filtered by the filter screen from inside to outside. The filtered raw materials flow to the outlet downward. Impurities that are larger than the gap of the filter screen are retained. After a period of operation, the gap of the filter screen is blocked by impurities. When the pressure difference reaches the set value, the PLC monitors the signal and gives instructions. The reduction motor drives the rotating scraper to clean dirt attached on the filter screen automatically to maintain the filtering function of the filter screen and smoothness of the gap of the filter screen. When impurities at the bottom of the filter increase, you can open the blow-off valve at the bottom of the filter to discharge the impurities to maintain the normal system pressure. The scraper of the scraper type self-cleaning filter is properly designed with optimal scraping angle. Under the driving of the reduction motor, the rotating scraper removes impurities in the gaps of the filter promptly, without disassembling the filter screen and maintaining smooth filtering of raw materials. The scraper type filter is a full automatic filter comprised of stator, scraper-brush cleaning system and spring. The pressure compensation of the spring is properly selected to minimize the wear of the filter screen.

Working Principle of Self-Cleaning Filters

Water enters from the inlet, passes through the rough filter screen which retains larger particles and then reaches the fine filter screen. During filtering, dirt and impurities accumulate on the fine filter screen, forming a layer of filtered impurities. Because impurities are accumulated on the inside of the fine filter screen, pressure difference is formed between the inside and the outside of the fine filter screen.  

When the pressure difference reaches the set value, the self-cleaning process starts automatically. During the process, clean water is supplied without interruption. The purge valve is open. The water pressure in the cleaning chamber and the suction device decreases sharply. With the pressure difference between the filtering cartridge and the suction device, a suction force is formed between the suction device and the cleaning chamber through the suction nozzle, comprising a sewage suction process. Meanwhile, the electric motor drives the suction pipe to carry out helical motion in the axial direction. The combination of the axial motion and the helical motion of the suction device completely cleans the inner surface of the filter screen. The cleaning process takes only tens of seconds. The blow-off valve is closed when the cleaning process ends. The full-automatic filter prepares for the next flush cycle. Water to be processed enters the filter through the inlet. Impurities in the water accumulate on the stainless steel filter screen, forming the pressure difference. The pressure difference switch monitors the change of the pressure difference at the inlet and the outlet. When the pressure difference reaches the set value, the electric controller gives signals to the water control valve and the driving motor. The motor drives the brush to rotate so as to clean the filtering element. At the same tine, the control valve is open for discharging wastes. The whole cleaning process takes only tens of seconds. When the cleaning process ends, the control valve and the motor are stopped. The system returns to the original state and enters the next filtering procedure. 

After the filter is installed, technicians commission the filter and set the filtering time and cleaning conversion time. When the water to be processed enters the filter through the inlet, the full-automatic filter starts working. When the set cleaning is reached, the electric controller gives signals to the water control valve and the driving motor. The motor drives the brush to rotate so as to clean the filtering element. At the same tine, the control valve is open for discharging wastes. The whole cleaning process takes only tens of seconds. When the cleaning process ends, the control valve and the motor are stopped. The system returns to the original state and enters the next filtering procedure.

Water enters the filter through the inlet, passes through the rough filter screen which retains larger particles and then reaches the fine filter screen. After fine particles are filtered by the fine filter screen, the clean water is discharged through the outlet. During filtering, dirt and impurities accumulate on the inside of the fine filter screen. Thus, pressure difference is formed between the inside and the outside of the fine filter screen. When the pressure difference reaches the set value, the cleaning process starts automatically. The blow-off valve is open. The hydraulic motor chamber and the hydraulic cylinder of the main pipe release pressure and discharge the water. The pressure in the hydraulic motor chamber and the suction pipe decreases sharply. Because of the negative pressure, dirt on the inner wall of the fine filter screen is suctioned through the suction nozzle and enters the hydraulic motor chamber through the hydraulic motor. Then the dirt is discharged from the blow-off valve. Thus the sewage suction process is formed. When water passes through the hydraulic motor, the motor drives the suction pipe to rotate. The piston of the hydraulic cylinder drives the suction pipe to carry out axial motion. The combination of the axial motion and the helical motion of the suction device completely cleans the inner surface of the filter screen. The whole cleaning process takes tens of seconds. After the cleaning process ends, the blow-off valve is closed. The increased water pressure pushes the piston of the hydraulic cylinder to the original position. The self-cleaning filter prepares for the next cleaning cycle. During the cleaning process, the normal filtering of the filter is not interrupted.