Efficient backwash-free high-precision filter

Abstract

The invention discloses an efficient backwash-free high-precision filter, which belongs to the technical field of high-precision filters, and is characterized in that a filtering mechanism comprises more than three layers of laminated perforated plates, and the perforated plates are uniformly provided with filtering holes of which the hole diameters are greater than the diameter of the maximum particulate matters to be filtered, the distance D between the centers of the adjacent filtering holes is larger than or equal to two times of the diameter d of the filtering holes, pre-pressing mechanisms are arranged on the perforated plates, the adjacent perforated plates are tightly connected in a sliding mode through the pre-pressing mechanisms, and the adjacent perforated plates move relativelyin a staggered mode. More than two filtrate holes with different hole diameters are formed between every two adjacent filter holes in a staggered manner, the hole diameters of the filtrate holes aregradually reduced from top to bottom, and the filtrate holes are communicated to form a filtrate channel. The filter has high-precision filtering capacity, is convenient to clean and does not need tobe backwashed.

Description

technical field [0001] The invention relates to the technical field of high-precision filters, in particular to a backwash-free self-adjusting high-precision filter. Background technique [0002] At present, high-precision filters are mainly composed of packing type and microporous material type. The packing type filter generates a small-diameter filter flow channel through the accumulation of filter material or extrusion of filter material, and filters the fluid through the interception of particles in the water through the pore size; The pore filter uses microporous material as the filter medium, and the required filter pores are formed during the production of the material, and the fluid is filtered by trapping particles through the pore size. [0003] However, the high-precision filter is different from the ordinary filter and can be disassembled and cleaned at will. The precision of the structure of the high-precision filter is extremely high, which also makes it diffic...

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Problems solved by technology

[0003] However, the high-precision filter is different from the ordinary filter and can be disassembled and cleaned at will. The precision of the structure of the high-precision filter is extremely high, which also makes it difficult to clean internally, and the cleaning cost is high. In order to To maintain high-efficiency and precise filtering effect, frequent cleaning is required

[0004] One of them is a packing filter, which adopts the deep filtration mode, and requires high-pressure head water or compressed air to backwash the filter material, which will generate a large amount of waste water after cleaning once, and the energy consumption is extremely high; and the filter material is difficult to clean during use Thorough cleaning is prone to hardening and partial flow of the filter material, and the filter material needs to be replaced regularly, resulting in heavy maintenance workload and high cost

The other is a microporous filter. The required microporous material is produced by the filter material through complex processes such as weaving or sintering. The cost of the material is high and the investment is huge. However, the pore size of the microporous filter is small. High-pressure water or compressed air must be used for backwashing, which consumes a lot of energy, and this material is easy to absorb dirt, requiring frequent backwashing, and sometimes when the microporous filter is blocked by fine particles and chemical sediments, it is difficult to clean and restore. It needs to be soaked with chemicals, which is difficult and expensive to maintain

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