Sewage and rainwater separate drainage system and method for controlling same

Abstract

The invention provides a separate drainage system for sewage and rainwater, which comprises a main sewage pipe on a municipal road, and a sewage treatment plant is arranged at the outlet of the main sewage pipe; The rainwater pipes and sewage pipes in the unit area are connected, and the sewage pipes are connected with the main sewage pipes; the rainwater treatment system is installed at the outlet of the rainwater pipes, and the rainwater treatment system includes diversion equipment and online treatment facilities; the rainwater pipes are connected with the water inlet of the diversion equipment, The first water outlet of the diversion device is connected to the sewage main pipe, the second water outlet is connected to the online treatment facility, and the third water outlet is connected to the rainwater main pipe. The system of the present invention is simple in structure and convenient in construction, and only needs to build diversion equipment and online treatment facilities in the limited area of ​​the community to realize efficient treatment of mixed sewage in the area of ​​the community.

Description

technical field [0001] The invention relates to a diversion drainage pipe network system, in particular to a diversion drainage system and control method for sewage and rainwater. Background technique [0002] Urban municipal drainage systems are mainly divided into combined drainage systems and divergent drainage systems. The earliest combined drainage system is to mix sewage, industrial wastewater and rainwater in the same pipe, and directly discharge it into the nearby water body without any treatment, so that the receiving water body is seriously polluted. Many old cities at home and abroad almost use it this way. The interception combined drainage system is often used now. [0003] The structure of the intercepting combined drainage system is basically the same as that of the traditional combined drainage system. The difference is that the intercepting combined drainage system has an intercepting well between the municipal combined main pipe and the sewage treatment p...

AI Technical Summary

Problems solved by technology

[0004] For this combined drainage system, the main problems are: ① When it rains, non-point source pollution will be generated on residential areas and municipal roads. Although the existing combined drainage system has an interception well at the end for interception, the designed interception The multiple is not enough, so that the interception well fails to intercept the non-point source pollutants, and the non-point source pollutants directly enter the natural water body, causing pollution to the natural water body

② To control non-point source pollution, it is necessary to increase the size of the interception well, increase the size of the interception main pipe, and increase the capacity of the sewage plant

③ The interception of the interception well is controlled extensively, and the initial rainwater cannot be accurately intercepted

There are many problems in this split drainage system: ① Some sewage in the residential area enters the rainwater pipe by mistake, for example, the sewage discharged from the washing machine on the balcony will be directly discharged into the natural water body

The main problems of this drainage system are: ①The entire system cannot effectively intercept non-point source pollutants, and the interception efficiency is low

② Unable to control the sewage entering the rainwater pipe

④ Extensive control of interception wells. On the one hand, it may not be possible to send more initial rainwater to the sewage plant for treatment, causing non-point source pollutants to be discharged into natural water bodies. On the other hand, it may send a large amount of late rainwater to the sewage plant, increasing the sewage The load of the plant reduces the treatment efficiency of the sewage plant

[0007] Generally speaking, the current drainage system has the following problems: first, the non-point source pollution cannot be controlled; second, the control is extensive, and the sewage and initial rainwater cannot be precisely controlled; third, the pipelines are mixed, and the sewage is directly discharged to the Natural water bodies; Fourth, for areas with tight land use, terminal treatment cannot be effectively implemented

[0008] At the same time, the inventors also found that the design of the previous rainwater and sewage pipe network was not perfect enough, and a large number of original rainwater pipes and rainwater main pipes did not separate the collected rainwater from the domestic sewage that was mixed and discharged into it. Sewage and rainwater are directly discharged to remote natural water bodies, causing serious water pollution

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