| 摘要 |
The present invention comprises: a filtering tank including an inflow pipe which takes in raw water, a discharge pipe which filters and discharges the raw water, a valve controlling the opening and closing of the discharge pipe, and an air cylinder installed in an upper central part to be connected to the inside; a filter unit installed by dividing an inner space of the filter tank, of which central part is combined with the air cylinder, and filtering the raw water; a backwash unit installed at a set distance from the lower part of the filter unit to supply backwash water into the filter tank to backwash the filter unit by using an eddy of the backwash water; and a pressure control unit installed outside the filter tank to measure and control pressure of the filter tank. The present invention is capable of enabling efficient and innovative backwashing by manufacturing the top of a backwash pipe in a shape corresponding to the filer unit and symmetrical to both sides and making an eddy in the filter tank by using a backwash pipe rotating member. |
