|供給力:||100 セット / Month|
|適用産業:||建材ショップ,製造工場,機械修理店,農場,建設動作,エネルギー & 鉱業|
|Filtation度:||100 に 3000 mciros|
Automatic screen Filter
A series of robust and reliable filters with automatic cleaning, designed for filtration of poor quality water with high flow rates. The filter is automatically cleaned by suction scanners when a pressure differential (typically 0.5 bar) is sensed. The suction scanners vacuum the inside of the screen's surface and flush any debris out the exhaust, using less than 1% of the total flow and without interrupting output. Filtration degrees between 800-10 micron and flow rates of up to 7200 m3/s can be achieved. Higher flow rates can be achieved by banking multiple units.
Raw water flows into the filter through the inlet. Water then proceeds through the screen cylinder from the inside out. This causes particulates to accumulate on the inside surface of the screen, progressively developing a filter cake. The filter cake in turn then traps particles much smaller than the aperture of the screen. Effluent leaves the filter through the outlet. An adjustable Pressure Differential Switch (PDS) continuously senses the pressure differential across the filter screen. The PDS signals the filter controller to initiate the cleaning cycle of the filter at a predetermined setting.
Once the cleaning cycle is initiated the exhaust valve opened and a suction scanner is activated. The driving mechanism then rotates the suction scanner in a slow fixed rotation while simultaneously moving the scanner linearly. The exhaust valve causes a high velocity suction stream at the nozzle tip, which cleans the inner surface as the suction scanner spirals across the screen. The downstream flow is uninterrupted during the cycle, which is completed in approximately 35 seconds.
Operation of self-cleaning filter Dirty water enters the self-cleaning filter inlet and is directed to the inside of a group of specially designed semi-permanent porous filtration elements. The water passes through the filters elements and out of the self-cleaning filter as Clear Clean Water. Any particulate larger than the filters element pore rating is left trapped inside the filter element. The self-cleaning filter elements are then periodically cleaned when a preset time or differential pressure is reached. When the self-cleaning cycle is initiated, a series of air operated valves are automatically activated redirecting a portion of the clean water stream back through the porous filter elements in a reverse flow. The reverse flow flushes the accumulated debris to the back-flush drain and cleans the element. The cycle is repeated until all elements in the automatic filter are cleaned and the operating cycle begins again. Less than 1% of the total filter flow is used in the back wash cycle.