Quicksand filter for sewage treatment

Abstract

The invention relates to the field of sewage treatment equipment and discloses a quicksand filter for sewage treatment, which comprises a box body, a sand washer is arranged at the top of an inner cavity of the box body, the bottom end of the sand washer is communicated with a lifting pipe extending to the bottom of the inner cavity of the box body, a water guide pipe is arranged on the outer side of the lifting pipe, and one side of the top of the water guide pipe is communicated with a water inlet pipe. A case is arranged at the bottom of an inner cavity of the box body, a driving motor is arranged in the case, an output shaft of the driving motor is fixedly connected with a rotating vertical shaft, the top end of the rotating vertical shaft extends to the top of an inner cavity of the lifting pipe, and the outer side of the rotating vertical shaft is fixedly sleeved with a spiral auger. According to the quicksand filter for sewage treatment, the case, the rotary vertical shaft and the spiral auger are used for replacing the existing structural design of pumping and lifting gravel, and the sand guide mechanism is linked, so that the amount of water pumped into the sand washer in the box body is effectively reduced, the sand washing efficiency is improved, and the waste of water resources is reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment equipment, in particular to a quicksand filter for sewage treatment. Background technique [0002] Quicksand filter is a commonly used equipment for water treatment and sewage purification, which is used to remove solid suspended matter and colloidal impurities in water, and the existing quicksand filter is continuous and does not need to be shut down to wash sand. The raw water enters the filter through the water inlet pipe and the water distributor located at the bottom of the filter. The water flows countercurrently through the gravel filter bed from bottom to top. The filtered filtrate gathers at the top of the filter and flows out through the overflow port. The polluted sand at the bottom is lifted to the sand washer on the top of the filter by the air lift pump, the pollutants are separated from the active sand by turbulent flow, the impurities are discharged through the outlet of the cleanin...

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Problems solved by technology

[0003] However, the sand in the existing quicksand filter is lifted into the sand washing device by the lift pump at the bottom to wash the sand, which makes a large amount of water pumped into the sand washing device by the lift pump, resulting in the cleaning of the sand and gravel. The efficiency is reduced, resulting in waste of water resources, and the sand guiding umbrella block of the existing quicksand filter is fixed under the water distributor, which makes it easy for the sand to agglomerate and block the outer edge of the bottom of the sand guiding umbrella block and the box body The gap on the inner wall cannot fall into the bottom of the box cavity, which affects the cleaning of sand and gravel, resulting in poor subsequent sewage treatment effect

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