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论述了我国层燃、半悬浮燃烧、悬浮燃烧,各种燃烧方式的优缺点,不同燃料应采用不同的燃烧方式;400多台燃煤工业锅炉测试表明:我国燃煤工业锅炉的运行效率普遍低于设计效率,从2 t/h到20 t/h以上燃煤工业锅炉,随容量的增加锅炉运行效率从68.03%到80.59%,各种能量损失中漏风引起的热损失最大,最高达21%,可采用膜式水冷壁、先进的炉排密封技术和自控技术解决漏风问题,排烟温度热损失次之,最高达5%,采用增加锅炉尾部受热面和新的循环系统来降低排烟温度;用典型案例证明了能效分析应从能源的开采、运输、利用、污染物控制全系统成本考虑,而不应从单一用能设备的效率高低来评价。
The advantages and disadvantages of stratified combustion, semi-suspension combustion, suspension combustion and various combustion modes in China are discussed. Different types of combustion should be adopted for different fuels. Tests on more than 400 coal-fired industrial boilers show that the operating efficiency of coal-fired industrial boilers in our country is generally low In the design efficiency, from 2 t / h to above 20 t / h for coal-fired industrial boilers, the boiler operating efficiency increased from 68.03% to 80.59% with the increase of capacity, and the heat loss caused by air leakage was the highest among various energy losses, up to 21% , Can use membrane water wall, advanced grate seal technology and automatic control technology to solve the problem of air leakage, exhaust heat temperature, followed by heat loss up to 5%, by increasing the rear of the boiler heating surface and a new heating system to reduce the exhaust temperature It is proved by the typical case that energy efficiency analysis should be based on the control of the whole system cost of energy exploitation, transportation, utilization and pollutants rather than the efficiency of single energy-using equipment.