Thermal power plant boiler NOx emission control method under variable-load working conditions

Abstract

The invention provides a thermal power plant boiler NOx emission control method under variable-load working conditions. The method comprises the steps of (1) establishing a boiler load prediction model and an NOx emission prediction model; (2) solving the optimum control quantity of a thermal power plant boiler according to prediction results of the boiler load prediction model and the NOx emission prediction model in order to meet the requirement for boiler load and achieve an optimized target of minimizing NOx emissions; and (3) issuing the optimum control quantity of the thermal power plant boiler to the thermal power plant boiler so as to control operation of the thermal power plant boiler. In order to meet the requirements for low NOx emissions of a thermal power plant and control operation parameters reasonably, the control parameters of the minimum NOx emissions can be obtained while the thermal power plant boiler load is guaranteed, so that the power generation efficiency is improved, NOx emissions are reduced, and the production requirements are met.

Description

technical field [0001] The invention relates to the technical field of NOx emission control, in particular to a NOx emission control method for thermal power plant boilers under variable load conditions. Background technique [0002] Pollutants emitted by power plant boilers mainly include NOx and SO 2 At present, desulfurization technology has been widely used in power plants and achieved good results, while the control of NOx emissions is still in its infancy. Since most of the parameters in the boiler operation will affect the NOx emissions and there is a complex coupling relationship between the operating parameters of the thermal power plant boilers, it has brought great difficulties to the prediction and control of the NOx emissions of the boilers. [0003] Reasonable control of boiler operating parameters can ensure the best NOx emission under the premise of meeting the boiler load, effectively reduce the emission of boiler combustion pollutants, and improve boiler o...

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Problems solved by technology

[0002] Pollutants emitted by power plant boilers mainly include NOx and SO 2 At present, desulfurization technology has been widely used in power plants and has achieved good results, while the control of NOx emissions is still in its infancy

Since most of the parameters in the boiler operation will affect the NOx emissions and there is a complex coupling relationship between the operating parameters of the thermal power plant boilers, it has brought great difficulties to the prediction and control of the NOx emissions of the boilers.

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