Study on Opposite Experiment between Grid Fabric Filter and Orifice Plate Fabric Filter

The orifice plate of self-pressure fabric filter was improved on the basis of the virtue and defect of a variety of fabric filter. Various respects and better prospects of grid fabric filter were proofed on operational cycle, period water volume and backwashing characteristic while filtering at high flow-rate and large discharge. It is showed that at the same filter conditions: the initial filtering rate is 40 m/h, compared with orifice plate fabric filter (operational cycle is 40 h, period water volume is about 7.5 m3 and the removal rate of mud is 70% in 10 minutes), operational cycle is 50 h, period water volume is about 9.5 m3 and the removal rate of mud is 90% in 10 minutes when grid fabric filter is run. The larger the initial filtering rate is, the more obvious the contrast is. Period water volume of grid fabric filter is about 2 times than of orifice plate fabric filter when initial filtering rate is 60 m/h, so that grid fabric filter have better application prospect at large discharge industrial consumption.