What paint does quartz sand filter spray? It is mainly to filter out a large number of solid particles in the water or impurities that are easier to precipitate through the medium,Further purification of raw water.In the pretreatment process, raw water is allowed to enter the quartz sand filter from top to bottom, from small to large, and the filter material of different sizes is filtered layer by layer,All impurities such as particulate matter, colloid and organic matter in the water are trapped,Effectively reduce the turbidity of water.Determine the recoil timing of quartz sand filters according to the condition of equipment head loss or the time of filter operation.Through the opening and closing of various valve bodies configured on the quartz sand filter, the quartz sand filter material inside the equipment is backwashed,After flushing the debris deposited on the medium,The device then entered a new filter cycle.It is the preliminary treatment of pure water preparation,An important
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How to test the purity of the filter? FIRST!1.Wang Dong 2.Ma Jinghui 3.Zhang Hongli 4.(1. Beijing Waterlink Environmental Engineering Co., Ltd,BEIJING 100028;2. national industrial water treatment Engineering Technology Research Center,Tianjin 300131;3. School of Environment, Renmin University of China,Beijing 100872;4. Nordic Water, Sweden,[Abstract] the pilot-scale experiments on the deep treatment of two sedimentation tank effluent from municipal sewage treatment plant were carried out by means of silt and active sand filter,It is feasible to use it in municipal water reuse,The water quality is stable,The indicators are better than the requirements of the draft for comment on 2002 of the 'urban Miscellaneous water quality standard.The selection of the flocculation and the filtration effect of the filter are briefly analyzed.[Key words] filter;Continuous filtering;DynaSand active sand filter is an advanced one invented by Sweden Waterlink AB,Conti
