A method for controlling the flow of sewage in a drainage system into a sewage main pipe during rainfall

Abstract

The invention discloses a method for controlling the flow of sewage in a drainage system into a sewage main pipe during rainfall. The method of the invention utilizes the existing resources to the maximum extent, and through reasonable allocation, the water quality in each rain sewage treatment unit is improved. Poor and heavily polluted initial rain is discharged into the main sewage pipe through the sewage interceptor of the diversion facility, and then enters the sewage treatment plant for treatment, and the middle and late rainwater with better water quality and less pollution is discharged through the outlet pipe of the diversion facility to In the natural water body or into the pipeline of the natural water body, at the same time, the sewage in the sewage pipe connected to the sewage pipeline is discharged into the sewage main pipe, and then enters the sewage treatment plant for treatment. It can reduce the pollution degree of sewage to each rainwater treatment unit as much as possible, and at the same time, it can also discharge clean rainwater into natural water bodies, avoiding the aggravation of the load of sewage treatment plants in rainy days due to the mixture of the two, so that the existing resources can be maximized. Optimization.

Description

technical field [0001] The invention belongs to the technical field of regulation and control of drainage systems, and in particular relates to a method for controlling the flow of sewage in a drainage system into a main sewage pipe when it rains. Background technique [0002] In the current society, urbanization is developing more and more rapidly, the area of ​​the city is getting larger and larger, the structure of the urban drainage pipe network is becoming more and more complex, and the treatment pressure of the urban water treatment system is increasing. [0003] The traditional urban pipe network system uses a large rainwater treatment system to be responsible for a large catchment area. Because the catchment area is too large, the delay time of rainwater in the pipeline or surface runoff is not fully considered, resulting in initial rainwater Mixed with the later rainwater in large quantities. For example, a city has built a storage tank in an area close to the urba...

AI Technical Summary

Problems solved by technology

But for area M, a large amount of later clean rainwater in area M is also discharged into the urban sewage treatment plant during the time when the storage tank discharges the initial rainwater in area N. Such discharge will cause great damage to the urban sewage system dealing with stress

In addition, the pipe network in M ​​area and N area is generally connected during actual operation. Due to the difference in distance and the retention effect on the road, the initial rainwater in N area may seriously pollute the later clean rainwater in M ​​area, which will also lead to rainwater discharge. The irrationality of the situation

As for the domestic sewage that must be discharged to the sewage pipeline of the sewage treatment plant, the flow rate that can be discharged to the sewage treatment plant is bound to be limited. If waterlogging occurs, the pollution in the area will be greatly increased.

[0005] At present, a technical solution to the above-mentioned problems has been proposed in the prior art, that is, the urban pipe network system is re-divided according to the unit area by means of fragmentation processing, but the current pipe network system is usually suitable for sunny weather When the rain falls, due to the limited processing capacity of the sewage treatment plant in the pipe network, the maximum flow rate of the main sewage pipe is limited; when heavy rain and heavy rain occur, the water in each unit area (such as domestic sewage, initial Rainwater and mid-late rainwater) are discharged to the sewage treatment plant at the same time, resulting in different degrees of waterlogging disasters in each unit area