Drainage system used in cities, towns and communities

Abstract

The invention requests to protect a drainage system used in cities, towns and communities, which is formed by connecting at least a co-line divided-flow dual-layer drainage pipe and channel or a common drainage pipe and channel with a rainwater-sewage compound dual-layer manhole. An intercepting rainwater-sewage compound dual-layer drainage manhole can be arranged on the drainage system accordingto the requirement so as to realize that the initial surface runoff is intercepted into a sewage pipe and channel and is delivered to a sewage treatment plant to be treated, and a non-intercepting rainwater-sewage compound dual-layer drainage manhole can be arranged according to the requirements of direction change, gradient change, connector change, pipe and channel intersection, examination andrepair of linear pipes and channels every certain distance and other special purposes. The drainage system can realize individual delivery and drainage of the rainwater and sewage by layers on the same pipeline and has the characteristics of simple pipelines, few manholes, low investment, operation and maintenance cost, capability of reducing the pollution effects of first rain runoff in an economic and effective manner, and no rainwater-sewage interflow and overflow water pollution, etc.

Description

technical field [0001] The invention belongs to the technical fields of urban drainage systems and environmental protection, and in particular relates to a drainage system. Background technique [0002] At present, there are mainly two systems in the field of urban drainage: the confluence system and the diversion system. The former is to transport and discharge rainwater and urban sewage in the same pipeline, and the latter is to transport rainwater and urban sewage separately in two pipeline systems. and emissions. At present, they all have certain defects and deficiencies respectively. [0003] For the intercepting combined drainage system, the main problems are: (1) There is rain-sewage combined overflow water in the rainy season, which contains a large amount of organic matter, suspended solids (SS) and pathogenic microorganisms, and is directly discharged into the water body without treatment. The pollution effect is large; (2) When the drainage pipeline is far away ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the serious pollution of the combined overflow water in the above-mentioned intercepting combined drainage system and the great impact on the operation of the sewage plant, the high cost of the pipeline network of the separated drainage system, the large underground space occupation, the large impact on traffic during maintenance, and the prominent initial rainwater runoff pollution , and the problems of building overflow water storage tanks and initial rain runoff storage tanks are expensive and occupy valuable urban land. Based on the idea of ​​intercepting small flow initial ground runoff on the same line, the present invention proposes a double-layer rain-sewage composite drainage inspection Drainage systems for towns and communities based on wells or further combined with the same line split double-deck drainage pipes and canals

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