Method and device for quickly treating and recycling sewage of car washing tank

Abstract

The invention discloses a method and a device for quickly treating and recycling sewage in a car washing tank. Sewage in the car washing tank is pumped by a sewage pump to enter a centrifugal drum through a grid and a doser, whether a flocculating agent is added or not is selected by the doser as required before the sewage enters the centrifugal drum, and the sewage flows to the periphery of the bottom through a water distributor after entering the centrifugal drum; after full filling, the sewage pump is stopped, the centrifugal drum is started, sewage is subjected to mud-water separation through density difference under the centrifugal effect, impurities including mud and sand are gradually enriched on the inner wall, clear water is left in the center, and after stable operation, the sewage pump and the drainage pump synchronously work at equal flow; and newly injected sewage is squeezed in and is kept at the lower part of the center under the action of self sedimentation and a flow baffle, the same amount of squeezed clean water is discharged back to the car washing tank from the upper part of the center by the drainage pump, mud-water separation and water circulation are stopped after water in the car washing tank is qualified, and impurities and a small amount of residual water in the centrifugal drum are cleaned. The device is good in sludge-water separation effect, high in treatment efficiency, simple in structure, easy to operate and high in practicability.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method and a device for rapid treatment and reuse of sewage from a car washing tank. Background technique [0002] The car wash tank on the construction site is frequently used. The turbidity of the sewage in the car wash tank is very high and contains a lot of sediment and other impurities. Therefore, the natural settlement effect is poor and the treatment is difficult. Direct discharge will bring serious environmental problems, but if it is not treated in time, it will It is not conducive to dust control at the construction site; in addition, frequent replacement of the water in the car wash tank is also a great waste of water resources. [0003] At present, precipitation, filtration and other treatment technologies are commonly used for sewage at construction sites. These treatment technologies have a long treatment process, complex equipment structure and many op...

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Problems solved by technology

[0002] The car washing tank on the construction site is frequently used. The turbidity of the sewage in the car washing tank is very high and contains a lot of impurities such as sediment. Therefore, the natural settlement effect is poor and the treatment is difficult. Direct discharge will bring serious environmental problems, but if it is not treated in time, it will cause serious environmental problems. It is not conducive to the control of dust on the construction site; in a...

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