A secondary settling tank for continuous sewage biological treatment
A sewage biological treatment and secondary settling tank technology, applied in the field of secondary settling tanks, can solve problems such as changing sludge properties, system sludge loss, and sludge floating, achieving good results, high mud-water separation efficiency, and pool capacity utilization. high effect
Active Publication Date: 2021-03-02
金锣水务有限公司
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[0040] Some embodiments of the present invention will be further introduced below in conjunction with the accompanying drawings, but it is not intended to limit the protection scope of the present invention.
[0041] refer to Figure 1-3 According to the present invention, a secondary settling tank for continuous sewage biological treatment includes a tank body 1 and a water distribution pipe 21 , a diversion tank 22 , a sludge collection tank 31 and a sludge discharge pipe 41 arranged in the tank body 1 . The pool body 1 is a cuboid concrete structure surrounded by the opposite first pool wall 11 and the second pool wall 12 and the opposite third pool wall 13 and the fourth pool wall 14 . The diversion tank 22 is located directly above the mud collection tank 31 so that the mixed solution entering the upper part of the diversion tank 22 through the water distribution pipe 21 flows in a substantially vertical downward plug flow manner, and the mixed solution in the mixed solut...
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Abstract
The invention relates to a secondary settling tank for continuous sewage biological treatment, comprising a tank body, a water distribution pipe, a diversion channel and a mud flow ditch arranged in the tank body, and the flow diversion tank is located at the side of the mud flow ditch Directly above makes the mixed liquid that enters the upper part of the diversion tank through the water distribution pipe flow in a substantially vertical downward plug flow mode, and allows the sludge in the mixed liquid to pass through the diversion tank in an unimpeded manner under the action of gravity And directly fall into the mud flow ditch arranged at the bottom of the pool body, the sludge in the mud flow ditch will flow into the sludge collection tank under the action of gravity in a non-stirring manner and then be discharged from the pool body. The beneficial effects of the secondary settling tank of the present invention include that the separation of mud and water is mainly carried out in the diversion tank without being disturbed by the flow of mixed liquid in other parts of the tank body, so that the residence time of the sludge in the secondary settling tank is much shorter than that of the hydraulic retention of the secondary settling tank Time, the secondary settling tank has high pool capacity utilization rate, simple structure, convenient installation and operation, high mud-water separation efficiency and good effect, etc.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a secondary sedimentation tank for continuous sewage biological treatment. Background technique [0002] The solid-liquid separation system (secondary sedimentation tank) is the core part of sewage biological treatment (activated sludge process). The efficient and rapid separation of sludge from the mixed liquor in the secondary settling tank often determines the success or failure of sewage biological treatment. For example, if the sludge stays in the sedimentation tank for too long, the properties of the sludge will be changed, and it may even cause the sludge to expand, resulting in a large amount of sludge floating in the secondary sedimentation tank. System crashes. Therefore, there is still a need to develop a new secondary settling tank to efficiently and quickly separate the sludge in the mixed liquor. Contents of the invention [0003] An object of the present invent...
Claims
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IPC IPC(8): B01D21/02C02F3/12
CPCB01D21/02C02F3/12Y02W10/10
Inventor 李进民周连奎李大勇
Owner 金锣水务有限公司