A kind of intelligent ammonia injection control method and intelligent ammonia injection control device

Abstract

The invention discloses an intelligent ammonia injection control method and an intelligent ammonia injection control device, which relate to the technical field of out-of-stock and automatic ammonia injection in thermal power industry; the intelligent ammonia injection control method comprises the following steps: S1, determining analysis and measuring points; S2, according to sampling Interval S Acquisition Time T H Obtain a historical data set from the historical data of each analysis measurement point and NOx emission concentration measurement point in the system; S3, carry out the training of the best prediction model of NOx emission concentration through a deep learning algorithm; S4, deploy the best prediction model on site; S5. Collect the real-time data of each of the analysis and measurement points, and predict the future NOx emission concentration through the best prediction model; the desulfurization and denitrification control system controls the amount of ammonia injection in real time according to the prediction results, so as to realize intelligent quantitative ammonia injection. The intelligent ammonia injection control method of the invention accurately predicts the NOx emission concentration, takes the prediction result as the input of the desulfurization and denitrification control system, realizes precise ammonia injection within the full load range, and completely solves the problems of excessive ammonia injection and insufficient ammonia injection.

Description

technical field [0001] The invention relates to the technical field of out-of-stock and automatic ammonia injection in the thermal power industry, in particular to an intelligent ammonia injection control method and an intelligent ammonia injection control device. Background technique [0002] Driven by economic benefits and increasingly stringent environmental protection requirements, power plants need to improve their competitiveness by continuously improving unit efficiency and reducing pollutant emissions. NOx (nitrogen oxides) is one of the air pollutants emitted by coal-fired boilers in thermal power plants, and its emission has become a key indicator to measure the pros and cons of boiler combustion, and is the basis for judging whether the boiler is running green. SCR destocking ammonia injection system is an effective technology to reduce NOx emission through chemical reaction. It has been widely used in large-scale power plant boilers, and has achieved good results...

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide an intelligent ammonia injection control method, which can accurately predict the NOx emission concentration and implement intelligent ammonia injection, and solve the problem of inconsistency between the real-time ammonia injection amount and the NOx emission concentration; the first aspect of the present invention One purpose is achieved through the following technical solutions:

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