Composite filter

Abstract

The invention discloses a composite filter, relates to filtering equipment which is used for treating industrial water and deep well water, and aims to provide the composite filter which is high in filtering efficiency, good in effect, low in cost, long in service life and small in size. The composite filter comprises a tank body, wherein a water outlet is formed in the top of the tank body; an water outlet channel is arranged in the tank body; the water outlet is communicated with the water outlet channel; filter elements are arranged in the middle of the tank body; the filter elements are cone-shaped bodies which are placed horizontally; the tops of the cone-shaped bodies are communicated with the water outlet channel; the bottoms of the cone-shaped bodies are mounted on the tank bodies; a separating layer is arranged under the filter elements; a vertical water inlet channel is formed in the center of the separating layer; an annular filter cavity is formed by the inner side of the separating layer, the outer side of the water inlet channel and the inner wall, being in contact with the separating layer, of the tank body; the annular filter cavity is filled with gravel; meshes of which the diameters are smaller than that of the gravel, are formed in the surface of a low separating plate of the separating layer; a water inlet and a gravel-changing operating opening are formed in the lower part of the tank body.

Description

technical field [0001] The invention relates to a filtering device, in particular to a composite filter used for industrial water and deep well water treatment. Background technique [0002] At present, most of the filters on the market are filters with a single structure, and there are many types, but the filtering function is single. For example, a simple centrifugal filter can only filter impurities with a density greater than water, a simple sand filter can only filter floating objects, and a simple mesh filter and disc filter can only be used as a single-stage filter. Filtration efficiency and functionality are limited. In order to improve the filtration efficiency, precision and flow rate, multiple filter devices with multiple functions must be used in combination to achieve this. For example, the commonly used combinations include gravel filter with disc filter, gravel filter with net filter, centrifugal filter with disc filter, centrifugal filter with net filter, e...

AI Technical Summary

Problems solved by technology

For example, the commonly used combinations include gravel filter with disc filter, gravel filter with net filter, centrifugal filter with disc filter, centrifugal filter with net filter, etc., which not only increases the equipment occupation It also increases the cost of the system and is cumbersome to maintain. At the same time, it increases the frequency of backwashing, reduces the utilization rate of equipment, reduces the filtration efficiency, and increases the cost of users. It cannot achieve the purpose of efficient irrigation.

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