Method and device for protecting boiler heating surface wall temperature

Abstract

The invention relates to a boiler heating surface wall temperature protection method and device. The method comprises the following steps that 1, historical combustion adjusting working conditions areclustered, and the combustion adjusting working conditions are divided into a plurality of groups of different combustion working conditions; 2, for each combustion working condition, a machine learning model of the risk coefficient of the heating surface is established, and a heating surface risk coefficient model library is formed; 3, based on a combustion working condition and a heating surface risk coefficient model library, the optimal energy flow distribution of the heated surface of the current real-time working condition is optimized, and the optimal energy flow distribution of the heating surface is obtained; and 4, soot blowers in different areas can be adjusted according to the optimal energy flow distribution of the heating surface, and the soot blowing strength in different areas can be adjusted, so that the energy flow distribution of the heating surface can be optimized, and a protection strategy for the wall temperature of a boiler steam-water pipeline can be obtained.The method is based on energy flow clustering and distribution soot blowing, starting from the historical operation data of the site, and on the basis that the boundary conditions of the combustion system are fixed, the soot blowing force in different areas is adjusted so as to optimize the energy flow distribution of the heating surface, and a protection strategy for the wall temperature of theboiler steam-water pipeline is obtained.

Description

technical field [0001] The invention belongs to the field of boiler heating surface wall temperature protection, and in particular relates to a boiler heating surface wall temperature protection method and device. Background technique [0002] With the rapid development of the power industry and the increasing requirements for energy conservation and environmental protection, my country's generator sets have entered a stage of development with large capacity and high parameters. Boilers are one of the three major auxiliary machines in thermal power plants. In order to adapt to changes in capacity, the number of tube panels on the heating surface along the width of the furnace increases, and the number of tube coils between the same panels also increases, which intensifies the flue width caused by boiler combustion. The uneven distribution of flue gas velocity and temperature leads to more prominent thermal deviation between tube panels and tube coils. The reasons for the th...

AI Technical Summary

Problems solved by technology

[0004] To sum up, with the increase of unit capacity, the safety of boiler heating surface tube wall is particularly important. The current research focuses on monitoring the heating surface wall temperature, and there is a lack of practical and effective strategies to protect the heating surface wall temperature safety, and the field operation conditions are complex.

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