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热效率就是锅炉输出的热量占燃料燃烧放出的热量的百分数。影响锅炉热效率的主要因素是排烟热损失、气体不完全燃烧热损失、炉体散热损失。其中排烟热损失是影响热效率的重要因素。通过对各项因素的分析,找出提高锅炉热效率的途径:降低排烟温度和过剩空气系数以降低排烟热焓;选用高效保温材料,提高辅射段、对流段、过渡段保温效果,降低炉体散热损失;调整合理的过剩空气系数,保证锅炉良好燃烧,降低气体不完全燃烧损失。
Thermal efficiency is the percentage of heat that the boiler outputs as a percentage of the heat released by the fuel. The main factors affecting the thermal efficiency of the boiler exhaust heat loss, gas incomplete combustion heat loss, furnace heat loss. Exhaust heat loss is an important factor affecting thermal efficiency. Through the analysis of various factors, find ways to improve the boiler thermal efficiency: reduce the exhaust gas temperature and excess air coefficient to reduce the enthalpy of exhaust gas; use efficient insulation material to improve the insulation section, convection section, transition section insulation effect, reduce Furnace body heat loss; adjust the reasonable excess air coefficient to ensure good combustion of the boiler to reduce the gas incomplete combustion loss.