Intelligent control system for sewage treatment plant key process parameters and control method of intelligent control system

Abstract

The invention relates to an intelligent control system for sewage treatment plant key process parameters. Biological tanks are connected with water amount regulation sluice valves respectively, aeration control valves are arranged between an air blower and the biological tanks and between an aeration pipeline and the biological tanks, a secondary sedimentation tank is connected with the biological tanks through sludge reflow control valves, regulation and control factor online data acquisition instrument terminals of the biological tanks, the secondary sedimentation tank, a flocculating sedimentation tank and a disinfection tank are connected with a central PLC, the central PLC is connected with an execution mechanism, and the execution mechanism is connected with the central PLC through a regulation and control period timer. The control method includes the steps that different weights and periods are distributed according to the characteristics of various regulation and control factors and the influence degrees of the regulation and control factors on control values, and periodic step regulation is carried out. The intelligent control system for the sewage treatment plant key process parameters and the control method of the intelligent control system have the advantage that the adaptability to process changes and regulation and control timeliness are improved. A large amount of theoretical calculation is omitted in the regulation and control mode of the system, so that the requirements for the accuracy and completeness of on-line meters are greatly lowered, and the running stability of the system is greatly improved on the basis of existing hardware.

Description

technical field [0001] The invention belongs to a sewage treatment plant, in particular to an intelligent control system and a control method for key process parameters of a sewage treatment plant. Background technique [0002] Sewage treatment plants generally operate continuously for 24 hours, and the operating effect is reflected in the final effluent quality and operating costs. The better the effluent quality and the lower the operating cost, the better the operating effect. The influent water quality and quantity of sewage treatment plants are generally continuous variables with low regularity and difficult to predict. At the same time, changes in influent water quality and quantity have a major impact on effluent water quality and operating costs. In order to improve effluent water quality and reduce operating costs, it is necessary to continuously adjust various process parameters in the water treatment process to cope with changes in influent water quality and quan...

AI Technical Summary

Problems solved by technology

The control method of precise calculation of mathematical model is completely established in theory, but the problem is that the accuracy of online instruments is high, and the butterfly effect is often caused by the error or failure of one instrument, resulting in the entire calculation process and the actual demand value. At the same time, the uncertainty of the influent water quality and quantity of sewage treatment plants and the objective existence of uncertain factors including air pressure, temperature, equipment status, etc., in fact, online instruments cannot ensure accurate measurement of all influencing factors. This contradiction exists The process control method based on mathematical model calculation and adjustment is often paralyzed in actual engineering applications, and it is difficult to meet the needs of stable operation of sewage treatment plants

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