The precision filter is aimed at the filtration accuracy, which is generally between sand filtration (coarse filtration) and ultrafiltration. Under the action of pressure, the raw water passes through the filter element, the impurities are trapped on the filter element wall, and the water flows out through the filter element to achieve the purpose of filtration. At this stage, the scale of manufacturers of filter equipment in my country is mainly small and medium-sized enterprises. The product uses high-quality stainless steel, hard polyvinyl chloride, engineering plastics, plexiglass and other corrosion-resistant materials as the outer shell, mainly high-quality stainless steel, with built-in filter elements of different media. The built-in filter elements include PE core, honeycomb core, folding core, titanium tube sintered core, activated carbon core, ceramic core, polypropylene fiber filter core, etc. Different filter elements have different filtering effects. Therefore, the precision filter can remove suspended solids, some colloidal substances and fine particles in the water according to the raw water quality, effluent quality and water volume requirements to achieve different filtering accuracy. At this stage, the precision filter of the precision filter on the market is in the range of 0.2-100um. Precision filters are often used as protective filters for electrodialysis, ion exchange, reverse osmosis, ultrafiltration and other devices. They can be applied to water treatment in food, wine, pharmaceutical, chemical, and electronics industries, such as:
Food industry: fine filtration of mineral water, clarification and filtration of beverages and alcohol. Pharmaceutical industry: water treatment of sterile water, oral liquid, infusion, injection, etc.;
Electronics industry: pure water preparation and washing water filtration in semiconductor, instrument, picture tube and other production plants;
Chemical industry: purification of organic solvents, esters, alcohols, acids, alkalis and other chemical raw materials and oils;
Environmental protection: treatment of electroplating wastewater, printing wastewater, pharmaceutical wastewater and other industrial wastewater. Water quality treatment for desalination of seawater and brackish water, water supply treatment for hotels and apartments, etc.;
Gardening: park courtyards, greenhouses, animal husbandry, and industrial places where superfine water mist needs to be artificially produced, as well as irrigation and maintenance of high-end flowers.