Boiler heating surface wall temperature protection method and device

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 method and device for protecting boiler heating surface wall temperature. 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 large-capacity and high-parameter development. The boiler is one of the three major auxiliary machines of thermal power plants. In order to adapt to the change of capacity, the number of tube panels along the width of the furnace on the heating surface has increased, and the number of tube turns between the same panels has also increased, which intensifies the width of the flue caused by boiler combustion. The flue gas velocity and temperature distribution are not uniform, which causes the thermal deviation between tube panels and tube circles to be mor...

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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