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Flexible regulation and control method for CO2 trapping system of coal-fired power plant for strictly controlling carbon emission

A coal-fired power station, strictly controlled technology, applied in the direction of control/regulation system, general control system, instrument, etc., can solve problems such as capture rate fluctuations, achieve the effect of reducing fluctuations and improving dynamic adjustment quality

Pending Publication Date: 2021-09-03
江苏舜高智能科技有限公司
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Problems solved by technology

[0004] The invention provides a coal-fired power station CO that strictly controls carbon emissions 2 The flexible control method of the capture system aims to solve the CO 2 The problem of large fluctuations in the key index of capture rate

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  • Flexible regulation and control method for CO2 trapping system of coal-fired power plant for strictly controlling carbon emission
  • Flexible regulation and control method for CO2 trapping system of coal-fired power plant for strictly controlling carbon emission
  • Flexible regulation and control method for CO2 trapping system of coal-fired power plant for strictly controlling carbon emission

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] see figure 1 , the present invention provides a technical solution: a coal-fired power station that strictly controls carbon emissions 2 The flexible control method of the capture system includes the following steps:

[0044] Step S1: Select CO as a large coal-fired power station 2 The controlled variables and control variables of the capture system, the main steam pressure, the enthalpy value of the intermediate point, the power generation of the unit, the capture rate and the reboiler temperature are selected as the CO of the large coal-fired power station. 2 For the controlled variable...

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Abstract

The invention is suitable for the technical field of thermotechnical automatic control, and provides a flexible regulation and control method for a CO2 trapping system of a coal-fired power plant for strictly controlling the carbon emission. The method comprises the following steps: S1, selecting a controlled variable and a control variable of a large coal-fired power plant CO2 capture system; s2, under the open-loop condition, inputting M sequence signals into the coal feeding amount, the water feeding flow, the opening degree of a main steam valve, the barren solution flow and the steam extraction flow of a reboiler; and s3, utilizing an n4sid algorithm in an MATLAB identification toolbox to obtain a state space model of the CO2 capture system of the coal-fired power plant. By establishing a predictive controller based on an amplification state space model, the control problems of strong coupling, large delay and strong system constraint of the CO2 capture system of the coal-fired power plant can be effectively solved, the dynamic adjustment quality is improved, meanwhile, soft constraint of output variables is added to performance indexes, the capture rate of the system is maintained between [ymin, ymax], the fluctuation of the CO2 capture rate is greatly reduced, and the strict control of carbon emission is realized.

Description

technical field [0001] The invention belongs to the technical field of thermal automatic control, in particular to a CO 2 Capture system flexible control method. Background technique [0002] In order to realize the development goal of "carbon peaking and carbon neutrality" as soon as possible, it is necessary to control the CO2 of coal-fired thermal power units. 2 largest single source for CO 2 capture, and develop strict CO 2 Emission Standards. Post-combustion CO based on chemical solvent absorption 2 Due to its technical maturity, capture has become the mainstream technology in the current pilot operation. [0003] At the same time, new energy sources such as solar energy and wind energy have the characteristics of discontinuity, volatility, and uncertainty, making it difficult to achieve continuous and stable power supply. For this reason, coal-fired thermal power units need to have deep peak-shaving capabilities to maintain the balance between supply and demand of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 李明亮廖霈之
Owner 江苏舜高智能科技有限公司
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