Drainage control method for sewage pumping station

Abstract

The invention discloses a drainage control method for a sewage pumping station. The method specifically comprises the following steps: 1, increasing a variable frequency pump; 2, adding a target valueof "constant liquid level" in a stepped liquid level threshold; 3, obtaining liquid level information of a collecting basin through a liquid indicator by a controller, and implementing a control strategy of "liquid level high opening and low closing" when the liquid level change caused by the change of the sewage inflow rate exceeds the established liquid level threshold of a switching pump; and4, acquiring the liquid level information of the collecting basin through the liquid indicator by the controller, and implementing a control strategy of "constant liquid level" when the liquid level change caused by the change of the sewage inflow rate dose not exceed the established liquid level threshold of the switching pump. On the basis of retaining the safety of the traditional control method, the drainage control method for a sewage pumping station provided by the invention complies with small fluctuation of the inflow through stepless variable flow of the variable frequency pump, and complies with large fluctuation of the inflow through the switch pump, which improves the drainage fluency of the sewage pumping station and meets the demand for water supply and drainage under the current situation of "large flow, weak regulation, and fluctuation".

Description

technical field [0001] The invention relates to the field of sewage transport in drainage pipe networks, in particular to a drainage control method for sewage pumping stations. Background technique [0002] Urban drainage system is an important urban infrastructure, including drainage pipe network and sewage treatment plant, which is responsible for the collection, transmission and treatment of urban domestic sewage and industrial wastewater. The sewage pumping station is an important transfer link in the drainage network. The sump of the pump station plays a certain role in regulating and storing during the transfer process, reducing the impact of inflow changes on the pump unit. Existing sewage pumping station drainage generally adopts the traditional control method of "high level open and low close", and the flow rate is increased or decreased by the level of the liquid level, which is simple and has certain safety. [0003] However, with the rapid development of urbani...

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Problems solved by technology

[0003] However, with the rapid development of urbanization, the water consumption has increased, the amount of sewage has increased, and the pipeline / pump station has been improved to a certain extent. However, due to the constraints of geographical space and environmental impact assessment, the capacity of the sump is rarely expanded, resulting in the weakening of the regulation and storage function. Station transfer pressure increases

Due to the unstable flow of sewage or rainwater entering the pump station, traditional control methods can easily cause problems such as frequent start and stop of the pump unit, high liquid level, sewage overflow, etc.

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