Air volume control system

Abstract

The invention provides an air volume control system. The system comprises an activated sludge oxygen consumption respiration rate meter, an industrial computer, an electric gas flow regulating valve,an air flow meter and a blower; the activated sludge oxygen consumption respiration rate meter is arranged at the tail end of an anoxic tank, and detects an OUR value of the sewage entering an aeration tank in real time; the industrial computer converts the OUR value into a required gas volume, then a required gas volume signal is transmitted to a blower control cabinet to adjust the blower and output the required gas volume; a control system adjusts the air volume of each aeration branch pipe by adjusting the opening degree of the valve and makes the sum of the air volumes of the branch pipesequal to the total gas volume value. The control system can effectively shorten the time lag of a sewage biochemical treatment system, reduce the repeated periodic oscillation of the system, and prolong the service life of the system; the influence of external interference factors is effectively reduced, and stable running of the system is ensured.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an air volume control system. Background technique [0002] Traditional sewage treatment plants that use bottom aeration generally adjust the aeration volume of the blower based on experience. This control method relies on manual experience and cannot perform real-time online control according to fluctuations in influent water quality and water volume, resulting in blower operation. High energy consumption and unstable effluent quality. In recent years, various precision aeration or control systems for precise aeration have been continuously pushed to the market. These aeration control systems are either based on the single-stage or multi-stage linkage PID control of the blower to the DO meter or the ammonia nitrogen online detector, or based on the activated sludge mathematical model ASM to simulate and calculate the aeration amount according to the quality and quantity of the i...

AI Technical Summary

Problems solved by technology

For the former, because the sewage biochemical treatment system is a system with a large time lag, it is difficult to adjust the PID in place in the shortest time, resulting in repeated periodic oscillations of the control system, making it difficult to achieve the control target and reduce the service life of the equipment; for the latter On the one hand, the ASM model mechanism itself is still under development, and the model itself has many parameters, while the sewage treatment system is a complex and changeable system, too many external interference factors are not conducive to the stable operation of the control system

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