Collaborative optimization type control system for sewage treatment process
A process control system and sewage treatment technology, which is applied in the field of water treatment, can solve problems such as difficult optimization and control of the sewage treatment process, and achieve the effects of ensuring efficient and stable operation, improving effluent water quality, and saving operating costs
Active Publication Date: 2018-11-06
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] The sewage treatment process is a complex industrial system with obvious characteristics of high nonlinearity and time-varying nature. Moreover, the sewage treatment process contains different dynamic response times and has multiple performance evaluation indicators, which makes the optimal control of the sewage treatment process have many difficult problems.
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[0071] (1) Sewage treatment process control system architecture design, specifically:
[0072] 1) The sewage treatment process control system includes server, PLC control cabinet, blower, redox potential electrode sensor at the anaerobic end, dissolved oxygen sensor at the aerobic end, suspended solids sensor at the aerobic end, temperature sensor at the effluent end, effluent The pH sensor at the end, the ammonia nitrogen sensor at the end of the water outlet, the total nitrogen sensor at the end of the water outlet, and the chemical oxygen demand sensor at the end of the water outlet; among them,
[0073] The server is the operation center of the sewage treatment control system, and its function is to optimize the control program and realize the monitoring function;
[0074] The function of the PLC control cabinet is to complete the automatic detection, monitoring and control of the status and operation status of the equipment in the sewage treatment process;
[0075] As th...
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The invention designs a collaborative optimization type control system for sewage treatment process so that problems that the performance indexes of different time scales of the current sewage treatment process can not be described easily and the optimized set value of the control variable can not be obtained easily can be solved. Dynamic characteristics of performance indexes of different time scales are obtained by a two-layer model; according to a collaborative optimization algorithm based a data-driven auxiliary model, the two-layer optimization model is optimized; optimized set values ofdissolved oxygen and nitrate nitrogen are obtained in real time; tracking controlling is carried out on the obtained optimized set values according to a predictive control strategy. Therefore, problems that the dynamic characteristics of performance indexes can not be described easily and the real-time optimized set value can not be obtained easily in sewage treatment optimization control are solved. The results demonstrates that the relationship between performance indexes can be balanced, the operation cost is lowered based on improvement of the water quality, the control precision of the system is improved, and the high-efficiency and stable operation of the control system are ensured when the system is applied.
Description
technical field [0001] The invention utilizes a collaborative optimization control system to complete the coordination of performance indexes of different time scales, realizes real-time optimal control of the sewage treatment process, and improves the system performance of the sewage treatment process. The designed collaborative optimization control system is applied to the time-varying sewage treatment process, and the dissolved oxygen S O concentration and nitrate nitrogen S NO Concentration real-time tracking control. The system can not only solve the problem of synergy between performance indicators and different time scales, but also effectively save operating costs, improve effluent water quality, and ensure efficient and stable operation. It is an important branch of the advanced manufacturing technology field, which belongs to both the control field and the water treatment field. . Background technique [0002] The process of sewage treatment is to use physical r...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 韩红桂张璐乔俊飞
Owner BEIJING UNIV OF TECH