Control system and method for flue dynamic air distribution cooperating with SNCR denitration

Abstract

The invention provides a control system and method for flue dynamic air distribution cooperating with SNCR denitration. The control system is composed of a sensing unit, an executing unit and a feedback adjusting unit, wherein the sensing unit comprises a temperature, NO concentration, CO concentration and NH3 concentration detection module, the execution unit comprises a secondary air execution layer, an over fire air execution layer and an SNCR execution layer, and the feedback adjustment unit comprises an instruction layer and a data layer. The control method comprises: detecting the parameters by the sensing unit; analyzing the data and generating a control instruction through the feedback adjustment unit, and storing detection parameters and the control instruction; and dynamically regulating and controlling the air distribution state and the reducing agent injection state through the execution unit. The control system and the control method have a feedback regulation function to realize dynamic regulation and control of combustion and denitration and self-correction of the system, and can be widely applied to the technical field of low-nitrogen combustion and SNCR denitration.

Description

technical field [0001] The invention belongs to the fields of waste low-nitrogen and low-dioxin combustion and flue gas denitrification, and in particular relates to a control system and method for dynamic air distribution in a flue in conjunction with SNCR denitrification. Background technique [0002] With the acceleration of my country's urbanization process, the proposal of urban waste classification, and the implementation of the "zero waste city" construction plan, the upgrading of urban industries and the improvement of the quality of life have caused a surge in urban waste, which has also increased the calorific value of waste. Waste incineration power generation has It has become the main technology for municipal solid waste treatment in my country. According to statistics, the average calorific value of waste in the Yangtze River Delta and Pearl River Delta regions in 2018 was higher than that of domestic waste in other regions of the country, and the calorific valu...

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Problems solved by technology

[0008] However, in the prior art, there are uneven distribution of flue gas in the high-temperature combustion zone, and NO in the local high-temperature combustion zone x Disadvantages of low efficiency due to large amount of production, difficulty in controlling the combustion temperature in the SNCR denitrification area, and insufficient mixing uniformity of flue gas and reducing agent

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