Biological tank process optimization and operation control system and its control method

Abstract

The invention discloses a biological tank process optimization and operation control system which comprises an intelligent biological process optimization and dynamic course control system, an SCADA / DCS (supervisory control and data acquisition / distribute control system) and an execution mechanism, wherein the intelligent biological process optimization and dynamic course control system is responsible for on-line course control on dynamic conditions and non-linear variation characteristics of fed water and microorganism activities of a sewage plant, and is used for providing process operation parameters after the dynamic condition optimization as target control values to a biological tank control system in real time; the SCADA / DCS is used for transmitting monitoring data to the intelligent biological process optimization and dynamic course control system, used for receiving data calculated and processed by using the intelligent biological process optimization and dynamic course control system, and used for controlling the execution mechanism finally; the execution mechanism is used for transmitting detected data to the intelligent biological process optimization and dynamic course control system, and used for executing process operation parameter instructions transmitted from the SCADA / DCS. Viewing from process optimization operation, intelligent precise automatic control on operation of a biological tank of the sewage plant can be achieved, and the purposes of energy conservation and emission reduction can be achieved.

Description

technical field [0001] The invention relates to the field of sewage pond water quality control, in particular to a biological pond process optimization and operation control system and a control method thereof. Background technique [0002] With the rapid development of urbanization, the amount of industrial wastewater and domestic sewage is increasing, and the amount of effluent pollution is required to be further reduced, which brings increasing pressure on urban sewage treatment plants. The State Environmental Protection Administration issued the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) in December 2002, and it came into effect on July 1, 2003. Compared with this standard, most sewage treatment plants have gaps in the discharge of ammonia nitrogen, total nitrogen and total phosphorus. At the same time, due to the lack of construction funds and the heavy operating costs after the construction of the plant, it has become an indisputa...

AI Technical Summary

Problems solved by technology

[0006] 1. Relying on the experience of on-site personnel to set the operating parameters of the biological pool of the sewage treatment plant (a fixed aeration rate, maintaining a fixed DO setting value, and a fixed internal return flow rate), there is no dynamic setting based on the real-time influent load ;

[0007] 2. The traditional PI / PID control based on feedback has hysteresis and oscillation;

[0008] 3. For dissolved oxygen control, the existing blower pressure control, through constant pressure control, each control area operates independently and affects each other, and the blower is passively adjusted, which is difficult to stabilize;

[0009] 4. Lack of complete and systematic biological process control, no internal reflux IRQ control, or no DO and IRQ associated control;

[0010] 5. Frequent operation of blowers, control valves, frequency converters and other equipment will cause major mechanical damage

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