Research and Treatment of the Large Temperature Difference of Water Cooling Wall in Front Wall Caused by Structural Effect of Supercritical W-Type Flame Boiler
To solve the problem of frequent water wall tube overtemperature and tube failure of the front water wall of a boiler,the thermal deviation from two aspects of heat transfer outside the pipe and heat absorption inside the pipe were analyzed.It is found that the water wall with the rifled tube has self-compensation characteristics.Through numerical simulation experiments,it is found that the change of temperature field and airflow field caused by structural effect has significant influence on the thermal deviation.It is the main reason for the deformation and leakage of the water wall.Then,the treatment schemes such as differential distribution of secondary air,thermal insulation coating of the front water wall and optimization of the combustion zone are put forward,which successfully control the problem of overtemperature tube failure of the water wall.
万方数据
维普
