Novel small gas-water backwashing filtration tank

Abstract

The invention discloses a novel small gas-water backwashing filtration tank, which comprises a tank body, wherein the tank body can be divided into 2-6 filtration grids, a filtration area of each filtration grid is not more than 30 m<2>, and the filtration grid is provided with a water inlet area, a filtration area, and a water and gas distribution area. According to the present invention, with an optimal design of a filtration head, filtration head clogging can be effectively prevented, and a rebuilding period of the filtration tank can be substantially prolonged, wherein the rebuilding period can be more than five years; with optimal designs of various positions of the tank body, a backwashing effect can be increased, energy saving and consumption reduction can be provided, and filtration material loss can be effectively prevented; the special water inlet distribution groove, a weir plate and a V-shaped groove of a V-shaped filtration tank are eliminated, and untreated water is assigned to various filtration grids only by adopting a water inlet total pipe and a water inlet branch pipe combination manner, such that the requirement of uniform water entering can be basically achieved, and a tank body structure is simplified; and backwashing water is uniformly distributed through the water and gas distribution area on the bottom of the tank, and backwashing gas is uniformly distributed through gas distribution manifolds outside the tank, such that the tank body structure is further simplified, an occupation area is reduced, and a cost is reduced.

Description

Technical field [0001] The invention relates to the field of water treatment technology, in particular to a new type of small air-water backwash filter tank. Background technique [0002] Filters are commonly used water treatment equipment for civil water supply, industrial water supply, wastewater treatment, environmental engineering, etc., relying on the interception, adsorption, and precipitation of filter materials to filter water. In the process, suspended solids, colloids and other Impurities are adsorbed by the filter material or removed by the gap barrier, and the water becomes clean. After the filter has been running for a period of time, the space for holding dirt between the filter layers gradually becomes smaller, the head loss of the filtered water becomes larger, and the filtered water becomes less and less, which reduces the filtering effect, or the quality of the effluent deteriorates, and the filtering fails. Flush to remove the dirt accumulated on the filter ma...

AI Technical Summary

Problems solved by technology

[0004] The existing V-shaped filter or air-water backwash filter has complex structure, high operation and maintenance requirements, high civil construction cost, and large floor area; its backwash process has large water consumption, large equipment investment, high operating cost and complicated operation And many other problems, it is difficult to promote to towns and small industrial and mining. When it is used for iron-containing groundwater or industrial wastewater treatment, there are still problems such as easy blockage of conventional filter heads.

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