Fuzzy prediction and compensation control method of tower top temperature for sintering flue gas desulfurization process

A technology for tower top temperature and fuzzy prediction, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as disturbance, low system stability, excessive fluctuation of disturbance factors, etc., and achieve the effect of suppressing the influence

Inactive Publication Date: 2011-12-07
CENT SOUTH UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fuzzy prediction and compensation control method for tower top temperature oriented to the sintering flue gas desulfurization process. The problem that the system stability is too low due to too large
[0007] A tower top temperature fuzzy prediction and compensation control method for the sintering flue gas desulfur

Method used

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  • Fuzzy prediction and compensation control method of tower top temperature for sintering flue gas desulfurization process
  • Fuzzy prediction and compensation control method of tower top temperature for sintering flue gas desulfurization process
  • Fuzzy prediction and compensation control method of tower top temperature for sintering flue gas desulfurization process

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Embodiment 1

[0043] Such as figure 1 The flow chart of the circulating fluidized bed flue gas desulfurization process is shown. The flue gas enters from the bottom of the desulfurization tower. The desuperheating water and desulfurizer are sprayed from the throat of the desulfurization tower under high-pressure air, and a mist-like area is formed above the throat. , the high-temperature flue gas entering the tower passes through the Venturi at the throat, and then sprays out at a high speed to fully contact and react with the water above and the desulfurizer, and the heat of the flue gas is gradually transferred to the desuperheating water through the water spray cooling method, and the temperature of the flue gas Gradually decrease. At present, in this research field, the detection value of the tower top temperature is generally used as a measure of the temperature environment in the entire tower. After a large number of experiments and field actual project experience, it is concluded that...

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Abstract

The invention discloses a method for vaguely predicting, compensating and controlling tower top temperature during desulfurization of sintering flue gas. Aiming at the problem that the tower top temperature cannot be stably controlled due to the influence of system time delay and external disturbance during desulfurization of the sintering flue gas, the method comprises the following steps of: building a prediction model of the tower top temperature by using a heat transfer mechanism; designing a vague prediction and compensation controller of the tower top temperature by taking the difference between a prediction value and a set value as input; and compensating water injection quantity by using model rule. By the method, main disturbance in a system is introduced into the prediction model, and a compensation value is calculated according to the difference between the prediction value and the set value, so the problems of poor stability of the system caused by large fluctuation of disturbance factors and the time delay of the system are solved.

Description

technical field [0001] The invention relates to a tower top temperature fuzzy prediction compensation control method for sintering flue gas desulfurization process. Background technique [0002] As an important link in iron and steel smelting, sintering is the second largest energy consumer in iron and steel production. Sulfur dioxide (SO 2 ) emissions accounted for the first place in the total emissions, and its energy-saving and emission-reduction plays an important role in the energy-saving and emission-reduction of the iron and steel industry. At present, in the sintering desulfurization process, the semi-dry circulating fluidized bed is an important process. This process uses quicklime slurry to combine with SO 2 A chemical reaction occurs to absorb SO 2 role to reduce SO 2 Concentration, because the chemical reaction is an exothermic reaction, a relatively low temperature environment is an important factor determining the desulfurization efficiency. In engineering, ...

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Application Information

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IPC IPC(8): G05B13/04
Inventor 吴敏曹卫华赖旭芝王春生安剑奇徐艳阳
Owner CENT SOUTH UNIV
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