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Self-cleaning filter is a separation equipment using of porous filter media, retain a mixture of solid particles in liquid and solid particles, and to achieve solid-liquid separated. Ancient China had used filtering technology in the production, two hundred years BC, has been paper made of plant fiber. Most of the period filters were for gravity filtration, then pressure filtration was used to improve the filtration rate, in turn, a vacuum filter. The early 20th century invention of the vacuum drum filter self-cleaning filter to achieve a continuous operation. Since then, various types of continuous self-cleaning filter have emerged. Intermittent operation of the self-cleaning filter to automate due to be developed, more and more filter area. To obtain a low moisture content of the residues, mechanical squeezing of the self-cleaning filters have been developed. Using a filter media to separate the container into upper and lower chamber, it constitutes a simple filter. Adding the suspension to the chamber, under pressure through the filter medium into the inferior vena become the filtrate, the solid particles are trapped on the filter media surface becoming residues. In the filtration process, the surface of the filter media residues accumulated gradually thickening, the resistance of liquid through filter cake layer will be increased, the filtration rate decreases. When the filter chamber filled with filter cake or the filtration rate is too small, stop filter to remove residues, for filter media regeneration, in order to complete a filtration cycle. Liquid through the filter cake layer and filter medium must be overcome resistance, so both sides of the filter media must have a pressure difference, which is the driving force for filtration. Increasing the pressure difference can speed up filtering, but the particles deformation after compression are easy to plug porous filter media in the large pressure difference, filter but slow. Suspension filtration has filter residue layer, deep filter and filter screen three ways. In practice, the filtering process, the three methods are often simultaneously or one after another. Self-cleaning strainer capacity depends on the filtration rate. Suspension of solid particles is in a large, uniform size, the filter pore residues are smoother, and the rate of filtrate through the filter cake layer is larger. Applications coagulant will be fine particles synthesis of a large set of clumps, help to improve the filtration rate. According to different methods of driving force to obtain filtered, self-cleaning filter divide into gravity filter, vacuum self-cleaning filter and pressure self-cleaning filter three types. Gravity filters are having the aid of gravity and with the suspension potential difference formed on the filter media filter pressure as the driving force, usually intermittent operation. Vacuum filter form negative pressure as a driving force for filtration in filtrate outlet. This self-cleaning filter is divided into two kinds of batch operation and continuous operation. Intermittent operation of the vacuum self-cleaning filter can filter various concentrations of the suspension, continuous operation of the vacuum self-cleaning filter for filtering solid particles containing more thick suspension. Pressure filter form pressure at the inlet of suspension, or applied mechanical squeezing force as a filter driver to the wet materials, for applications that require greater filtration pressure suspension, also divided into two kinds of continuous operation and intermittent operation The developing new type of filtration equipments including: mechanical press filtration equipment; dynamic self-cleaning filter which can achieve residue-free layer; large-scale filtration equipment which used in washing coal, sewage treatment, chemical and oil industry. Use of computer controlled filter operation is the development direction of filtration equipment. Shenzhen Yongli Filter Co., Ltd is the china filters exporter of filters, including diesel filter, water separator, air oil separator , hydraulic filters and many other filters. If you have any needs,please contact us.
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separator, separated, filter, strainer, gravity filter, vacuum filter, pressure filter, self-cleaning filter,
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