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...

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