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连续退火炉热效率一般较低,如何提高能源利用率显得尤为重要。以国内某企业现有热镀锌连续退火炉为分析对象,通过总结大量理论计算结果和现场实际生产数据,得出结论,认为与其它余热回收方式相比较,低压换热器余热回收技术是最经济、最便捷的余热回收方式,排烟温度最低可以降低到80℃。另外分析了蓄热式燃烧技术在连续退火炉的应用特点,认为这种技术不如低压换热器余热回收方式稳定,产品成本也没有优势。
Continuous annealing furnace thermal efficiency is generally low, how to improve energy efficiency is particularly important. Based on the analysis of a large number of theoretical calculation results and the actual production data in the field, the conclusion is drawn from the existing hot-dip galvanizing continuous annealing furnace in a certain domestic enterprise that the waste heat recovery technology of the low-pressure heat exchanger is the best compared with other waste heat recovery methods Economical, the most convenient waste heat recovery, exhaust gas temperature can be reduced to 80 ℃. In addition, the application characteristics of regenerative combustion technology in continuous annealing furnace are analyzed. It is considered that this technique is not as stable as waste heat recovery method of low pressure heat exchanger and has no advantage in product cost.