Fluidized bed precipitation device and sewage treatment system thereof

Abstract

The invention provides a fluidized bed precipitation device and a sewage treatment system thereof. The fluidized bed precipitation device comprises an outer shell, a cover body, an inner shell, a water collecting tank, a stirrer and a blocking piece; the outer shell is of a hollow structure with an opening in the top, the hollow structure forms a containing cavity, and a sludge discharging deviceis arranged at the bottom of the outer shell; the cover body is connected with the outer shell and seals the opening of the outer shell; the inner shell is arranged on the lower portion of the containing cavity, the inner shell is of a hollow structure with an opening in the top, the hollow structure forms a stirring cavity, the bottom of the inner shell is connected with a water inlet pipe, and the water inlet pipe communicates with the inner shell and the outer shell; the water collecting tank is arranged on the upper portion of the containing cavity, the side wall of the water collecting tank is in sealed connection with the side wall of the outer shell, and a water outlet pipe is connected outside the water collecting tank and provided with a water outlet valve; the stirrer is providedwith a stirring rod which penetrates through the cover body and extends into the stirring cavity; the blocking piece is arranged in the containing cavity and located between the inner shell and the water collecting tank, and the blocking piece is fixedly connected with the side wall of the outer shell. The fluidized bed precipitation device provided by the invention is high in precipitation rateand high in precipitation efficiency, and can provide quality guarantee for sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a fluidized bed sedimentation device and a sewage treatment system thereof. Background technique [0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements of being discharged into a certain water body or reused. Physical, chemical and biological methods are used to treat wastewater to purify wastewater and reduce pollution, so as to achieve wastewater recycling, purpose of reuse. At present, the fluidized bed is a widely used sewage treatment process. The fluidized bed is a reactor that uses gas or liquid to pass through the granular solid layer to keep the solid particles in a state of suspension and movement, and to perform a gas-solid phase reaction process or a liquid-solid phase reaction process. [0003] In the current sewage treatment process, the sedimentation rate and sedimentation effect of the fluidized bed are the m...

AI Technical Summary

Problems solved by technology

However, most of the fluidized bed sedimentation and flocculation in sewage treatment are in one shell at present, the sedimentation rate is slow and the sedimentation effect is poor. In some cases, the flocs in the suspension layer will penetrate the suspension layer and enter the upper water removal layer. Affect the purification quality of upper water

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