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介绍燃用低热值燃料的M474型65t/h倒转炉排抛煤机锅炉的设计思路、设计方法、设计特点和运行情况。该型锅炉的成功开发填补了国内65t/h抛煤机锅炉燃用低热值燃料（12500～14500kJ/kg）的一项空白，为我国低热值燃料的有效利用开辟了一条新的途径。
This paper introduces the design method, design method, design features and operation of the Model M474 65t / h inverted coal cooler with low calorific fuel. The successful development of this type of boiler has filled a gap in the low-calorific value fuel (12500 ~ 14500 kJ / kg) for domestic 65t / h boilers, which opens up a new way for the effective utilization of low calorific value fuel in our country.