In response to the phenomenon of combustion deviation in opposing-fired boilers equipped with side coal bunkers

experimental studies on the uniform distribution of pulverized coal production and transmission are conducted. Measurements and analyses of primary air volume

pulverized coal flow rate

steam temperature

and wall temperature are carried out

and these findings are cross-validated with theoretical calculations of pulverized coal pipeline resistance. The results identify the uneven distribution of pulverized coal as the primary cause of combustion deviation. Through optimization of pulverized coal distributor opening and the zoning control of over-fire air to regulate wall temperatures

feedback from the visualized wall temperature distribution of heat-absorbing surfaces is used to guide combustion adjustment. The test results show that the distribution of pulverized coal directly affects the temperature distribution on the boiler's side walls

subsequently causing steam temperature deviations. Adjustments to the pulverized coal distributors demonstrate a significant effect in mitigating combustion deviation. After the adjustments

the boiler wall temperature distribution become more uniform

the steam temperature deviation reaches the design specification

and the issue of combustion deviation is significantly improved.