A kind of overturning aquaculture sewage sand filter tank

Abstract

The invention provides a turnover type aquaculture sewage sand filter tank. The turnover type aquaculture sewage sand filter tank comprises an outer truss, a filter tank, a water collection pond and a drainage pipe, wherein the outer truss is connected with water spray pipes; the filter tank is arranged inside the outer truss and provided with a turnover shaft; the water spray pipes are arranged above the filter tank; the water collection pond is arranged below the filter tank and is connected with the drainage pipe; and the inner wall of the filter tank is provided with an anti-corrosion anti-wear coating which is composed of the following components in parts by weight: 15 to 30 parts of magnesium oxide, 50 to 70 parts of aluminum oxide, 5 to 20 parts of silicon dioxide, 5 to 8 parts of cross-linked polyvinylpyrrolidone, 2 to 20 parts of zinc oxide and 2 to 4 parts of magnesium hydroxide whiskers. According to the invention, by adopting double water spray pipes, the sewage discharge speed is improved; the drainage pipe innovatively adopts a form of double valves and double pipelines and can be used to discharge sewage or filtered dirts; and through control and selection of purified water channels, the filtering efficiency is improved. The turnover type aquaculture sewage sand filter tank provided by the invention has the function of rotatably cleaning sand particles; meanwhile, the sand filter tank has the advantages of good anti-wear and anti-corrosion properties, high operation efficiency and long service life.

Description

technical field [0001] The invention belongs to the technical field of seawater sewage sand filter tanks, and in particular relates to a flip-type breeding sewage sand filter tank. Background technique [0002] Seawater filtration technology is one of the most important links in factory farming. As a water purification device, the sand filter has been widely used in circulating aquaculture. The seawater is passed through porous filter materials such as quartz sand, and the suspended pollutants in the water are separated from the seawater by using the interception ability of the filter material, so as to achieve water purification. the goal of. The filtration mechanism of the sand filter can be simply expressed as that the suspended particles pass through the gaps of the filter layer, move from the water, and attach to the surface of the filter material. The complete removal mechanism includes two processes of suspended particles, migration and attachment. At present, sand...

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Problems solved by technology

[0004] The existing technology has improved the working efficiency of the sand filter, and has a simple structure, small size, and high backwash pressure, but the sand filter needs to be backwashed, which consumes a huge amount of backwashing energy, and the inner wall of the sand filter may be worn or corroded if used for a long time , there is no pre-filtration sterilization device, and the corrosion resistance of the inner wall of the sand filter needs to be improved

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