Automatic control system and method for combining constant water level and constant water volume of sewage plant

Abstract

The invention provides a sewage plant constant water level and constant water volume combined automatic control method, the sewage plant is provided with a water inlet pump room and at least one pump station, the water inlet pump room is internally provided with a water inlet pump and a transfer pump, the water inlet pump is used for conveying water into a biological tank in the sewage plant, the flow rate of the water inlet pump is A, the transfer pump is used for transferring water to other sewage plants, and the flow rate of the transfer pump is A; the pump stations independently convey water to the in-plant biological tank, the flow of the pump stations is B, and the in-plant total flow is A + B; the transfer pump executes a constant liquid level control mode, so that the liquid level of the water inlet pump room is kept unchanged; and the water inlet pump executes a constant flow control mode to keep the total flow in the plant constant. According to the automatic control method, the constant water level and constant water volume control mode of the sewage plant can be achieved, production operation is stabilized under the condition that the treatment load of the sewage plant is guaranteed, and the water level of an outer pipe network is reduced.

Description

[0001] This application is a divisional application for the invention patent of the parent case titled "Automatic Control Method Combining Constant Water Level and Constant Water Volume in Sewage Plant"; the application number of the parent application is: CN202010213343.1; the application date of the parent application is: 2020.03 .twenty four. technical field [0002] The invention relates to a water quantity automatic control method in a sewage plant, in particular to an automatic control system and method combining constant water level and constant water quantity in a sewage plant. Background technique [0003] Water volume control is the core element in the production and operation process of the sewage plant. The greater the fluctuation of the influent volume, the greater the time variation coefficient, and the higher the requirements for the control of dissolved oxygen and sludge concentration in the plant. If you want to stabilize the production and operation, the hig...

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Problems solved by technology

At present, the automatic control program of most sewage plant inlet pump rooms only starts and stops according to the liquid level of the inlet pump room to regulate the inflow flow, and cannot match the water delivery volume of the upstream pump station. Often, the water delivery volume of the pump station network exceeds the design load of the sewage plant or The phenomenon of "morning peak and evening peak" has a certain impact on the sewage dispatching of sewage plants and pipe networks

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