What properties are needed in cut to length machine raw materials?
HEPA filter, how to clean 50? Say, 'h10 can't be washed,Students who can H12,I don't know where it came from?The HEPA filter is made as a precision material,The higher the efficiency,The more you can't clean.Because the HEPA efficiency will be reduced after use,Although the air purifier is still running with a filter screen,But there may be no purification capacity.In particular, in order to increase the filtration efficiency of some HEPA materials,The electrostatic material treated by the electret is made,Even more can not be washed,Moreover, this kind of material will have less and less static electricity during use,Efficiency will be lower and lower.That is to say,HEPA material is a consumable,If you use it, you can't restore it.Just like paper,No matter how good the toilet paper is, no one will wash it and use it again?Believe me,The bacteria on the HEPA filter screen after a few months of use are not necessarily cleaner than the hand paper http://www .Broncoclean.Com/xingyexinwen/154.And,Not on
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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