Filter works: 
 Penetration through the membrane filtration - filtration - contact coagulation process, so that the water quality purification. 
 Anthracite filter is the use of quartz sand as filter media to improve the filtration rate increase per unit area of ??water and improved several times a Sewage Interception capacity and reduce the project cost and covers an area of ??the most effective way to reduce. 
 Widely used in water quality before and after the chemical industry, metallurgy, thermal power, pharmaceutical, paper, printing and dyeing, food production process. 
 Anthracite filter in the filtration process, the role of the good or bad, directly affect the water quality of the filter, so the choice of this filter must meet the following requirements: 
 A high mechanical strength, the fragmentation rate and the wear rate should not exceed 3% (by weight). 
 Two stable chemical properties, non-toxic substances. In general, acidic, neutral, alkaline water, not dissolved. 
 (3) the various types of water can reach a good purifying effect. 
 Of particle size gradation and specific surface area.