Swirl filter and sewage purification method therefor

Abstract

The invention discloses a swirl filter, which comprises a water inlet pipe, a filter drum, a filling barrel, a filter net, a central water outlet pipe, a cover plate and a sludge diversion plate, wherein the water inlet pipe is of a helical structure and is arranged to communicate with an inner cavity of the filter drum along the tangential direction of the filter drum; the whole filling barrel is an annular barrel with an opening in the top and the outer wall is a cone; the filling barrel is located in the inner cavity of the filter drum and an annular space is formed between the outer wall of the filling barrel and the outer wall of the filter drum. The invention further provides a sewage purification method. Sewage enters a barrel in a tangential form and forms swirling flow, heavy particles naturally fall off and the filter net is not easily bruised or blocked, so that the life of the filter is prolonged and the filter effect is improved. In addition, the filter drum is in a conical form, and is capable of assisting the heavy particles in naturally falling off, and the sludge diversion plate is also arranged at the lower part of the filter, so that the falling heavy particles can be automatically discharged out of the filter, and the filter has the advantages of adaptive capacity and a high treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a cyclone filter and a method for purifying sewage. Background technique: [0002] Eutrophication refers to the fact that a large amount of nitrogen, phosphorus and other elements are discharged into the surface water body with slow flow rate and long renewal cycle, which makes algae and other aquatic organisms grow and reproduce in large quantities, so that the rate of organic matter production far exceeds the consumption rate. , the accumulation of organic matter in the water body and the process of destroying the aquatic ecological balance. Under suitable conditions, algae, especially blue-green algae, reproduce and grow abnormally, and form a layer of blue-green and foul-smelling floating foam on the water surface, that is, "water bloom", which releases stench and deteriorates the water quality. In severe cases, the water will also be exhausted. Oxygen ki...

AI Technical Summary

Problems solved by technology

Among them, the purification of river water mainly adopts ecological processes such as ecological floating islands and artificial wetlands, but these processes are slow to take effect and occupy a large area

Due to the low content of organic matter in urban water bodies, high ratios of nitrogen to carbon and phosphorus to carbon, it is uneconomical and less effective to use the activated sludge method for conventional urban sewage treatment.

In addition, during the working process of the existing filter, the sewage water contains sediment that has not been fully separated. After the filter is used for a period of time, certain dirt will inevitably adhere to the filter screen, which will reduce the filtering effect and require frequent cleaning. The backwash filter screen is time-consuming and labor-intensive, and it is not convenient to operate

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