干熄焦余热回收与转化系统的效率分析

 根据某钢厂的干熄焦余热回收与利用系统的工艺流程，绘制了能流图和流图。采用热平衡和平衡对干熄焦系统的余热转化效率状况进行研究。结果表明，干熄炉、余热锅炉的热效率分别为82.39%、67.35%，效率分别为82.13%、65.77%，整个系统的热效率和效率分别为74.33%、55.32%。通过分析发现，影响余热回收和利用的主要因素为干熄炉和余热锅炉的内部换热损失，对此提出了一些优化措施，以提高干熄焦系统的能量利用效率。

Efficiency analysis of CDQ waste heat recovery #br# and conversion system

Based on the process of the waste heat recovery from the CDQ and the utilization system， the energy flow diagram and the exergy flow diagram were drawn. The waste heat conversion efficiency of the CDQ system was studied by means of the thermal balance method and the exergy balance method. The results show that the thermal efficiencies of the dry quenching furnace and the waste heat boiler were 82.39% and 67.35%， respectively， and the corresponding energy efficiencies were 82.13% and 65.77%. The thermal efficiency and the system energy efficiency were 74.33% and 55.32%， respectively. Through the exergy analysis calculation， it was found that the two parts， the internal heat transfer process of dry quenching furnace and the waste heat boiler have serious exergy loss. According to the results of the exergy analysis， two main devices of the CDQ waste heat utilization system were optimized to improve the energy utilization efficiency of the dry quenching system.