Operating principle of filter

Filter working principle:

◆ operating principle of automatic self-cleaning filter (I)

The water enters through the inlet, first through the coarse filter to remove the larger particles of impurities, and then to the fine filter. In the filtration process, the fine filter gradually accumulates dirt and impurities in the water, forming the filter impurity layer. As the impurity layer accumulates on the inside of the fine filter, a pressure difference is formed on the inside and outside sides of the fine filter.

When the flange connection of Y type filter differential pressure reaches the preset value, the will start automatic cleaning process, the water here, the supply does not block the purge valve is opened, clean room and pollution in the water pressure drop dramatically, through a filter cylinder and the pressure difference between the suction sewage pipe, pollution between the tube and cleaning room through the suction nozzle have a suction, forming a pollution process. At the same time, the electric motor drives the suction pipe to spiral along the axial direction. The whole inner surface of the filter is completely cleaned by the combination of axial motion and rotary motion of the filter. The entire process takes only a few seconds. The drain valve closes at the end of cleaning. The filter is ready for the next flush cycle.

◆ operating principle of automatic self-cleaning filter (ii)

The water to be treated enters the body through the inlet, and impurities in the water deposit on the stainless steel filter, resulting in differential pressure. Through differential pressure switch monitoring in and out of the nozzle pressure difference of change, when the differential pressure to set data, control device for hydraulic control valves, motor drive signal, caused by the following action: motor driving brush rotation, the filter cleaning, emission control valve to open at the same time, the whole cleaning process for dozens of seconds, when the end of the cleaning, close the valve, the motor stop running, system back to its initial state, began to filter into the next process.

Commissioning, equipment installation, the technician to set time filtering and cleaning conversion time, to be processed in the water by water entry into the body, filter began to work, when reaches the preset cleaning time, electric control device for hydraulic control valves, motor drive signal, caused by the following action: motor driving brush rotation, the filter cleaning, emission control valve to open at the same time, the whole cleaning process for dozens of seconds, when the end of the cleaning, close the valve, the motor stop running, the system back to its initial state, began to filter into the next process.

◆ working principle of automatic self-cleaning filter (3)

The water enters the filter through the inlet, first filtering out the impurities of larger particles through the coarse filter element assembly, and then reaching the fine filter screen. After filtering out the impurities of small particles through the fine filter screen, the clean water is discharged through the outlet. During the filtration process, the impurities in the inner layer of the fine filter gradually accumulate, and a pressure difference is formed between the inner and outer sides of the fine filter. When this differential pressure reaches a preset value, the automatic cleaning process begins: the blowdown valve opens, the hydraulic motor chamber and the hydraulic cylinder of the main assembly release the pressure and discharge the water; The pressure in the hydraulic motor chamber and the suction pipe is greatly reduced. Due to the negative pressure, the dirt on the inner wall of the fine filter screen is absorbed through the suction nozzle, which flows into the hydraulic motor chamber by the hydraulic motor and is discharged by the sewage valve, forming a process of dirt absorption. When the water flows through the hydraulic motor, the suction pipe is driven to rotate, and the piston of the hydraulic cylinder drives the suction pipe to move in an axial direction. Through the combination of axial movement and rotary movement, the suction device components completely clean the entire inner surface of the filter screen. The entire cleaning process will last for tens of seconds. The drain valve closes at the end of the cleaning, the increased water pressure causes the hydraulic cylinder piston to return to its original position, and the filter begins to prepare for the next flushing cycle. During the cleaning process, the filter works normally without interruption.