A high-efficiency backwash-free high-precision filter

Abstract

The invention discloses a high-efficiency backwash-free high-precision filter, which belongs to the technical field of high-precision filters. The filtering mechanism comprises three or more stacked perforated plates. For filter holes with particle diameters, the distance D between the centers of the adjacent filter holes is greater than or equal to twice the diameter of the filter holes d, the perforated plate is provided with a pre-compression mechanism, and the adjacent perforated plates pass through the The tightening mechanism can be slidably and tightly connected, and through the relative dislocation movement between the adjacent perforated plates, the two adjacent filter holes are staggered to form more than two filtrate holes with different pore sizes, and the pore size of the filtrate holes gradually decreases from top to bottom. Small, and the filtrate pores are connected to form a filtrate channel. The invention has high-precision filtration capability, is convenient for cleaning, and does not need backwashing.

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 of filler type and microporous material type. The filler type filter produces a small pore size filtration channel through the accumulation of filter material or extrusion of filter material, and the pore size retains particles in the water to achieve filtration of fluid; Pore ​​filter uses microporous material as filter medium, forms required filtering micropores during material production, and realizes filtration of fluid by intercepting particulate matter through the pore size. [0003] However, the high-precision filter is different from the ordinary filter, which can be disassembled and cleaned at will. The precision of the structure of the high-precision filter is extremely high, so it is difficult to carry out internal cleaning, a...

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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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