Water fromEntering through the inlet, first filter out larger particles of impurities through a coarse filter, and then reach the fine filter. During the filtration process, the fine filter gradually accumulates dirt and impurities in the water, forming a filter impurity layer. As the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter.

When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin, during which the clean water supply continues to flow. The cleaning valve opens, and the water pressure in the cleaning chamber and the suction pipe drops significantly. Through the pressure difference between the filter cartridge and the suction pipe, a suction force is generated between the suction pipe and the cleaning chamber through the suction nozzle, forming a suction process. At the same time, the electric motor drives the suction pipe to spiral along the axial direction. The combination of axial and rotational motion of the suction device thoroughly cleans the entire inner surface of the filter screen. The entire flushing process only takes a few tens of seconds. The drain valve is closed at the end of cleaning. The filter is preparing for the next flushing cycle.

a. The fully automatic backwash sewage filter adopts multiple filter cartridges for filtration, with a large effective filtration area and low pressure loss. Design the filtration area to be 3-5 times the inlet and outlet area.

b. The fully automatic backwash sewage filter is easy to maintain and repair: a maintenance manhole is set up, the filter cartridge is easy to load and unload, and the backwash filter is easy to maintain

c. The fully automatic backwash sewage filter adopts a structure of multiple filter cartridges filtering and cleaning each filter cartridge one by one, with uninterrupted water supply during cleaning.

d. Fully automatic backwash sewage filter program control: Various parameters of the system can be set according to the actual situation of the user's site.

e. Advanced control system for backwash filter: The control system has high accuracy and can adjust its working mode and operating status according to different water quality to improve its adaptability to water quality.

f. Convenient control method for backwash filter: simultaneous or separate control of pressure difference/time, can be selected according to actual working conditions and requirements, and automatically runs; Simultaneously equipped with a manual/automatic switch, the control mode can be pre-set, and electrical interlocking can be achieved,

g. The backwash filter is equipped with local control, and if necessary, a remote control switch can be installed to achieve both local and remote operation.

h. The backwash filter has functions such as operating status output and fault alarm output, ensuring that the equipment can be used under safe and reliable conditions with fully automatic backwash and sewage filter function

The backwash filter has strong filtration capacity and high flow rate: The large flow "straight through" filter widely used in coal mines can only reach a maximum flow rate of 380L/min due to structural limitations, while this filter can reach 800L/min or even larger. Fully automatic filter, filter, fully integrated water processor, electronic descaling device, backwash filter with high filtration accuracy: The backwash filter has two or more sets of filter elements inside, with a large flow area and small original pressure loss, which can achieve high flow and high-precision filtration (25 m, 40 m), which is difficult to achieve with traditional filters. Quantitative pollution level of backwash filter: The filter can be equipped with pressure gauges K1 and K2 at the inlet Pi and outlet Po of the liquid, with a pressure difference of P=K1-K2, which quantitatively reflects the degree of pollution of the filter and is easy to clean at any time. Traditional filters have no secondary function.