VFL (vertical flow labyrinth) water flow structure, device, system and method for sewage treatment

Abstract

The invention provides a VFL water flow structure for sewage treatment. The VFL water flow structure for sewage treatment is a bent flow channel water flow structure and comprises a flow guide wall structure positioned in a sewage treatment tank, and the lower end of the flow guide wall structure is fixedly connected with the bottom of the sewage treatment tank. The flow guide wall structure divides the sewage treatment tank into an anaerobic zone, an anoxic zone and an aerobic zone which are connected in sequence, and a flow guide channel is arranged between the front end of the anaerobic zone and the front end of the aerobic zone. A sewage flow guide structure is arranged in the flow guide channel, the sewage flow guide structure comprises a plurality of first flow guide plates and second flow guide plates, which are arranged at intervals, and the first flow guide plates and the second flow guide plates divide the flow guide channel into a plurality of sequentially-communicated multi-grid areas. The lower portion of each first flow guide plate is provided with a lower penetrating channel. The lower end of each second guide plate is fixedly connected with the bottom of the sewagetreatment tank, and an upper sewage crossing channel is formed in each second guide plate. The water flow structure has the advantages of being low in cost, simple in structure, convenient to use, free of electromechanical equipment and convenient to maintain and overhaul.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a VFL vertical flow labyrinth water flow structure, device, system and method for sewage treatment. Background technique [0002] At present, the activated sludge method is widely used in sewage treatment, AO process, A 2 The O process is widely used. The sewage needs to pass through the anaerobic pond, the anoxic pond and the aerobic pond in turn, and the activated sludge contained in the sewage treatment pond is used to biodegrade the organic pollutants in the sewage. During the sewage treatment process, it is necessary to maintain the suspension of activated sludge and prevent it from settling to the bottom of the tank. Generally, an aeration pipe is usually installed in the aerobic tank to supplement the required dissolved oxygen for the aerobic tank, and at the same time use the air bubbles generated by aeration to disturb the sludge. Keep activated sludge in suspe...

AI Technical Summary

Problems solved by technology

[0004] 1. The energy consumption of the submersible stirring motor is high during operation, which virtually increases the operating cost of the sewage treatment plant;

[0005] 2. Since the submersible mixing motor is installed at the bottom of the pool, it is subject to strong water body and biological corrosion, and the sewage treatment plant needs to maintain it irregularly, which increases the maintenance cost of the equipment

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