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Application of self-cleaning filter in reclaimed water project


Experts said that exploring the space for renewable water use is “an inevitable way” for water deficient metropolises. The successful development of self-cleaning filter has effectively promoted the reclaimed water reuse project.

Reclaimed water generally flows to three fields: industrial manufacturing, agricultural irrigation and river environment. The self-cleaning filter uses the filter screen to effectively intercept the harmful substances in the water body, so as to purify the water source and improve the water quality. The water quality treated by the self-cleaning filter meets the reuse standard stipulated by the state.

The water to be treated enters the machine body from the water inlet, and the impurities in the water are deposited on the stainless steel filter screen, resulting in differential pressure. The pressure difference at the inlet and outlet is monitored through the pressure difference switch. When the pressure difference reaches the set value, the electric controller sends a signal to the hydraulic control valve and drive the motor, causing the following actions: the motor drives the brush to rotate to clean the filter element, and the control valve is opened for sewage discharge. The whole cleaning process only lasts for tens of seconds. When the cleaning is completed, close the control valve and the motor stops rotating, The system returns to its initial state and starts the next filtering process.

It is very feasible to use self-cleaning filter to recycle its water resources. The self-cleaning filter has the characteristics of stable effluent quality, low operation cost, small floor area and long service life.