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Optimal control method and system for scr denitrification system

A technology of system optimization and control method, applied in the field of SCR denitration system, can solve problems such as affecting the control efficiency and rationality of SCR denitration system, and unable to optimize control of system real-time parameters.

Active Publication Date: 2016-06-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] However, the control method of the SCR denitrification system commonly used at present cannot optimize the control according to the real-time parameters of the system, thus affecting the control efficiency and rationality of the SCR denitrification system

Method used

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  • Optimal control method and system for scr denitrification system
  • Optimal control method and system for scr denitrification system
  • Optimal control method and system for scr denitrification system

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Embodiment Construction

[0075] see figure 1 , figure 1 It is a schematic flow chart of the optimal control method for the SCR denitrification system of the present invention.

[0076] The method for optimizing the control of the SCR denitrification system comprises the following steps:

[0077] S101, when the nitrogen-ammonia ratio is greater than 1 and less than 1, measure and obtain NO reflection parameters of the SCR denitrification system at a preset temperature;

[0078] S102, calculate the apparent reaction rate constant K of NO at each temperature when the nitrogen-ammonia ratio is greater than 1 according to the following formula NO :

[0079] K N O = - u l n ( 1 - η ) ( 1 - ...

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Abstract

The invention provides a selective catalytic reduction (SCR) denitration system optimizing control method and a system thereof. The SCR denitration system optimizing control method comprises the steps of obtaining reflecting parameters of NO of an SCR denitration system under a preset temperature by measurement respectively when the nitrogen-ammonia ratio is larger than 1 and smaller than 1; calculating apparent reaction rate constant KNO of NO under various obtained temperatures, activation energy of adsorption rate constants of NH3 under various temperatures and pre-exponential factors according to the obtained reflecting parameters, establishing a control model of an infinitesimal volume of a reactor of the SCR denitration system, and performing power optimizing control on the SCR denitration system. Accordingly, Optimizing control can be performed on the SCR denitration system on the basis of SCR denitration system real-time kinetic parameters, and control efficiency and rationality on the SCR denitration system can be improved.

Description

technical field [0001] The invention relates to the technical field of SCR denitrification systems, in particular to an optimal control method for an SCR denitrification system and an optimal control system for an SCR denitrification system. Background technique [0002] The principle of SCR (Selective Catalytic Reduction, selective catalytic reduction method) is that under the action of a catalyst, the reducing agent NH3 reduces NO and NO2 to N2 at 290-400 ° C, and almost no oxidation reaction of NH3 occurs, thereby improving the selection of N2 Sex, reducing the consumption of NH3. [0003] With the wide application of SCR denitrification system in thermal power plants in my country, the problems of operation and management of SCR catalyst and denitrification system have become increasingly prominent. The optimal scheduling of the SCR denitrification system is related to the normal operation of the SCR denitrification system, and also related to cost control. [0004] Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 李德波
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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