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一、余热利用的重要性节能是我们能源工作者最关心的课题,而余热利用又是节能工作中的重要一环。各种工业锅炉、窖炉、化工反应炉、加热炉等从烟气中带走了大量余热,多数工业炉排烟温度偏高。据调查,排烟温度高于200℃的占一半以上,有的高达600℃,甚至有的高达1000℃。我国仅工业锅炉就有20万台,每年耗用2亿吨标准煤。如能降低排烟温度50～100℃,则每年可节约1000万吨标煤,价值5亿元左右。四川省工业锅炉约一万台,其效率多在50～60％,排烟温度一般为200～300℃,若每台工业锅炉平均按3t/h计,又若全省三分之一的工业锅炉装上热管换热器后效率提高6％,
First, the importance of waste heat utilization Energy-saving is our energy workers are most concerned about the issue, and waste heat utilization is an important part of energy-saving work. A variety of industrial boilers, pit furnaces, chemical reactors, furnaces and so away from the flue gas a lot of waste heat, the majority of industrial furnace exhaust gas temperature is high. According to the survey, the exhaust gas temperature above 200 ℃ accounted for more than half, some up to 600 ℃, and some even up to 1000 ℃. China has only 200,000 industrial boilers, consuming 200 million tons of standard coal each year. If you can reduce the exhaust temperature of 50 ~ 100 ℃, the annual savings of 10 million tons of standard coal, the value of 500 million yuan. About 10,000 units are used in industrial boilers in Sichuan Province, with an efficiency of more than 50-60% and an exhaust gas temperature of generally 200-300 ° C. If the average boiler capacity is 3t / h for each industrial boiler, and if one-third of the industrial area Boiler installed heat pipe heat exchanger efficiency increased by 6%