Sewage treatment device and combined system sewage discharge system

Abstract

The sewage treatment device comprises a first vertical shaft and a second vertical shaft which form a communicating vessel, the upper portion of the first vertical shaft is connected with a water inlet pipe, the upper portion of the second vertical shaft is connected with a water outlet pipe, and the bottom elevation of the water inlet pipe is higher than that of the water outlet pipe; and a filter layer is also formed in the second vertical shaft. The sewage treatment device further comprises a backwashing pump and an air blower, a water collecting pipe and an aeration pipe are arranged on the lower portions of the first vertical shaft and the second vertical shaft, the water collecting pipe is connected to the backwashing pump, an air blower pipe is connected to the air blower, and after the backwashing pump is started, filtered water on the upper portion of the second vertical shaft is reversely sucked to conduct backwashing on the filtering layer of the second vertical shaft. The water collecting pipe is used for collecting dirty water after backwashing, and the efficient filtering efficiency of the filtering layer is recovered through backwashing. The invention further discloses a combined system sewage discharge system, the sewage treatment device is connected in the combined system pipe network, overflow sewage can be effectively treated, and pollution of the overflow sewage is avoided.

Description

technical field [0001] The invention belongs to the technical field of sewage discharge and treatment, and relates to a sewage discharge and treatment device. Background technique [0002] After the rainfall occurs, the flow in the combined pipeline will increase with the increase of rainfall. When the pipeline flow exceeds the design capacity of the sewage treatment plant or sewage collection system, the excess part is directly discharged by overflow, which is called combined overflow. stream pollution. [0003] In recent years, most of the newly built urban drainage pipe networks have adopted the rain and sewage diversion system. However, due to historical reasons, most of the old urban areas in China still retain the combined drainage system. In the process of black and odorous water treatment and sponge city construction, some small and medium-sized cities are constrained by the local government’s financial or underground pipeline constraints, and it is difficult to ef...

AI Technical Summary

Problems solved by technology

In the process of black and odorous water treatment and sponge city construction, some small and medium-sized cities are constrained by the local government's finances or the tightness of underground pipes. It is difficult to effectively promote the transformation of the combined pipeline system, and its sewage overflow is more common. Smell" has become a "pain point" that management units cannot comfort, seriously restricting the improvement of water environment

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