Self-cleaning filtering device

Abstract

The invention relates to a self-cleaning filtering device. The device comprises a tank body, wherein a cavity is formed in the tank body; the tank body comprises an upper necking part and a middle endpart, the diameter of an upper end cavity of the upper necking part is smaller than that of a lower end cavity, the lower end of the upper necking part is connected with the upper end of the middle end part, a filtering material is placed in the cavity, an inner cavity of the upper necking part is communicated with a water outlet pipe, and an inner cavity of the middle end part is communicated with a water inlet pipe. During working of the self-cleaning filtering device, the squeezed degree of the filtering material on the lower end surface of the upper necking part is small, the porosity islarge, and large-particle impurities can be filtered out; the squeezed degree of the filtering material on the upper end surface of the upper necking part is large, the porosity is small, small-particle impurities can be filtered out, and deep filtration can be effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a self-cleaning filter device. Background technique [0002] In petroleum, chemical and other industrial enterprises, cooling water accounts for approximately 87.3% to 90.1% of industrial water use. Considering economic benefits, social benefits and environmental protection, cooling water should be recycled. [0003] At present, in industrial water treatment technology, side filter is mainly used to remove suspended solids, and the basic forms include sand filter, fiber bundle filter and disc filter. [0004] Due to the increase of the concentration ratio of the sand filter tank, the biological slime will also increase. After a period of operation, the sand filter will form a compaction, resulting in perforation of the filter layer, which cannot guarantee the effect of filtration and backwashing; the disk type tank is purely mechanical. Filtration, the filtration effect ...

AI Technical Summary

Problems solved by technology

[0004] Due to the increase in the concentration ratio of the sand filter tank, the biological slime will also increase. After a period of operation, the sand filter will form a compaction, resulting in perforation of the filter layer, which cannot guarantee the effect of filtration and backwashing; the disc type tank is purely mechanical. Filtration, the filtration effect on microorganisms is not obvious; the fiber bundle tank has the advantages of small filtration resistance, high filtration speed, and large sewage interception capacity, but because the filtration water flow direction of the existing equipment is from top to bottom, the backwash water flow direction is Bottom-up, so the fiber bundles are not easy to clean, and auxiliary facilities such as air bags or machinery are needed to adjust the density of the fiber bundles, which makes the structure of the water treatment equipment complex, prone to failure, affects the efficiency of water treatment, and consumes a lot of water

In summary, the lag in the development of filtration technology has restricted the further development of industrial water treatment technology, and the removal of suspended solids is a key problem in industrial water treatment operations.

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