Swimming pool equipment manufacturer-About swimming pool filter sand tank

A certain scale of quartz sand is generally placed in the sand tank filter. The size and specification of the quartz sand are different within a certain range. In the filter sand tank, the quartz sand is arranged from top to bottom, from small to large. During normal filtration, the water It enters from the upper layer of sand and comes out from the lower layer. When water flows through the filter layer from above, part of the solid suspended matter in the water enters the tiny holes formed by the upper filter material and is trapped by the surface layer of the filter material due to adsorption and mechanical retention. At the same time, the suspended matter between these trapped Overlapping and bridging occurs again, as if a thin film is formed on the surface of the filter layer, which continues to filter the suspended matter in the water, which is the so-called membrane filtration of the surface layer of the filter material. This filtering effect is not only on the surface of the filter layer, but also has this interception effect when water enters the middle filter layer. In order to distinguish it from the filtration of the surface layer, this effect is called osmotic filtration.

In addition, because the sand particles are closely arranged with each other, when the suspended particles in the water flow through the tortuous channels in the sand layer, there will be more opportunities and time to collide and contact with the surface of the filter material. The suspended solids in the sand layer bond with the flocs on the particle surface of the sand layer to form a contact coagulation process. To sum up, the filtration of the sand tank is to further purify the water through the process of membrane filtration, osmosis filtration and contact filtration. Guangdong Boying Environmental Protection Equipment Co., Ltd. mainly produces stainless steel sand tanks, hair collectors, ultraviolet sterilizers and other swimming pool equipment. 020 Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..