Sewage disposal process multi-purpose control method based on nonlinear model prediction
A nonlinear model, a technology for sewage treatment, applied in the field of water treatment, which can solve the problems of uncertainty, inability to dynamically reflect the implied relationship between operating variables and control targets, and different contents.
Active Publication Date: 2013-07-10
BEIJING UNIV OF TECH
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[0004] Although the traditional switch control or PID control is a widely used control method at present, because the dissolution process of oxygen is affected by the water quality, temperature and pH value of the incoming water, it is highly nonlinear, strongly coupled, time-varying, and large characteristics such as hysteresis and uncertainty
The traditional switch control or PID control method has poor self-adaption ability and often cannot achieve ideal control effect
At the same time, due to the hysteresis characteristics of the sewage treat
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[0068] The present invention obtains a method based on nonlinear model prediction of dissolved oxygen DO and nitrate nitrogen S in the process of sewage treatment. NO Concentration control method; this control method analyzes the sewage treatment process by constructing the RBF neural network model, and uses the method of model prediction to control the aeration rate and internal circulation return flow in the sewage treatment process, so as to control DO and S NO the purpose of concentration;
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Abstract
The invention provides a sewage disposal process multi-purpose control method based on nonlinear model prediction aiming at the characteristics that a sewage disposal process is high in nonlinearity, strong in coupling, large in time varying and lag, severe in uncertainty and the like. Control of concentration of dissolved oxygen (DO) and nitric nitrogen (SNO) in the sewage disposal process is achieved. According to the control method, a sewage disposal process prediction model is established, a nonlinear model prediction control method is used for multipurpose control, and accordingly control effect is improved, the dissolved oxygen and the nitric nitrogen can meet expected requirements quickly and accurately, and the problem that self-adaptive capacity is bad based on switch control and PID control currently is solved. Experiment results show that the concentration of the dissolved oxygen and the nitric nitrogen can be quickly and accurately controlled through the method, strong self-adaptive capacity is achieved, quality and efficiency of sewage treatment can be improved, sewage treatment cost is lowered, and sewage treatment plant high-efficiency and stable operation is facilitated.
Description
technical field [0001] The invention utilizes a nonlinear model-based predictive control method to realize dissolved oxygen (DO) and nitrate nitrogen (S NO ) concentration control, dissolved oxygen (DO) and nitrate nitrogen (S NO ) concentration directly determines the effect of sewage treatment, and has an important impact on effluent water quality and energy consumption. Dissolved oxygen (DO) and nitrate nitrogen (S NO ) control, as an important part of sewage treatment, 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] With the growth of the national economy and the enhancement of public awareness of environmental protection, sewage treatment automation technology has ushered in unprecedented opportunities for development. The national medium and long-term scientific and technological development plan proposes to research and promote new technologie...
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IPC IPC(8): G05B13/04C02F3/12
CPCY02W10/10
Inventor 韩红桂伍小龙王丽丹乔俊飞
Owner BEIJING UNIV OF TECH
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