Abstract: Traditional grab-crane weighing systems in municipal solid waste incineration power plants suffer from measurement delays and cumulative errors of 3%-5%, leading to deviations in the calculated furnace-feeding waste amount and limiting the accuracy of real-time combustion-condition regulation. In this study, a real-time combustion adjustment method based on the dynamic coupling of grate speed and waste-bed thickness was developed. A multi-parameter coupling model incorporating effective grate area, waste-bed thickness, waste bulk density and grate speed was established to optimize the coordinated control strategy for combustion air distribution and grate operation. In addition, the correlation characteristic between air-pressure differential and waste-bed thickness was used to realize advanced prediction and regulation of the combustion process. Practical verification showed that, after application of the proposed method, the power generation per ton of waste increased by 14.03 kWh. Based on the furnace-feeding waste amount in a comparable statistical period, the equivalent additional power generation was estimated to be 9.308 9×106 kWh. The power generation efficiency increased from 21.71% to 25.12%, corresponding to a relative increase of 15.71%, while the ignition loss of bottom ash decreased from 3% to 2%. The proposed method can reduce the measurement delay and systematic errors associated with traditional weighing-based metering, improve the refined operation and maintenance level as well as the power generation efficiency of municipal solid waste incineration projects, and provide reliable empirical data and control logic support for the application of intelligent combustion technologies.

Key words: municipal solid waste incineration, bed thickness, combustion regulation, furnace feed waste mass, intelligent combustion technology, power generation efficiency