FILTER CLOTH WASHING METHOD AND FILTER CLOTH WASHING DEVICE OF FILTER PRESS

摘要

To provide a filter cloth washing method and a washing device of a filter press appropriately performing washing against the clogging of each filter cloth.SOLUTION: In a filter cloth washing method of a filter press where a filter chamber is formed by arranging a plurality of filter plates 5 in parallel whose front and rear surfaces are stretched with a filter cloth 6, a dewatered cake formed in the filter chamber is discharged by opening the filter plates 5, the filter cloth 6 is washed with a washing pipe 7 provided for each filter cloth 6 and a washing water amount is controlled by opening and closing an electric valve 20 at the washing pipe 7,: a reference filtrate amount V0 and a reference opening D0 of the electric valve 20 having a wide range beforehand are set and an accumulated filtrate amount V permeated from each filter cloth 6 is calculated; the filter cloth 6 having the accumulated filtrate amount V in the range of the reference filtrate amount V0 is washed with opening smaller than the reference opening D0 of the electric valve 20; and the washing water amount of the clogged filter cloth 6 having smaller accumulated filtrate amount V than the reference filtrate amount V0 is increased by performing washing at the reference opening D0 of the electric valve 20.SELECTED DRAWING: Figure 9