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Numerical Modelling of Effect of Heat-insulation on Combustion in Coal-fired Furnaces

In order to solve the difficulties encountered when determinig accurately the area and position of heat-insulation on furnace's waterwall, a three dimensional numerical modelling method of combustion process in furnaces is put forward on the basis of the conventional thermal calculation of boilers, and the method was used to simulate the furnace combustion of a 130 t/h P.C fired boiler. The modelling shows that it can analyze quantitatively the effect of the heat-insulation on temperature distribution in furnaces and combustion efficiency, and the modelling results are consistent well with the reality, therefore, it is effective and reliable.