独立焦化干熄炉效率分析与改良措施  

Efficiency analysis and improvement measures of CDQ chamber in an independent coking plant

作　　者：李火银[1] 王振亚[1] 汤松臻[1] LI Huo-yin;WANG Zhen-ya;TANG Song-zhen(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《中国冶金》2021年第12期67-72,106,共7页China Metallurgy

基　　金：国家自然科学基金资助项目(52006199)。

摘　　要：立足于独立焦化厂的干熄焦余热发电系统,为提高余热回收质量,采用热平衡分析法与[火用]平衡分析法对干熄炉系统的余热回收效率进行了计算与分析。干熄炉系统实际工况下的热效率与[火用]效率分别为79.59%和84.81%,低于设计工况的81.75%和89.06%。实际工况下干熄炉内部换热[火用]损失为9.88%,高于设计工况下的5.46%。分析表明焦炭烧损率是影响干熄炉系统[火用]效率的主要因素,干熄炉内部换[火用]损失降低了干熄炉余热回收效率。优化循环气体的成分、含量和流速是提高干熄炉系统能量回收效率的主要措施。Based on the coke dry quenching(CDQ) waste heat power generation system in an independent coking plant,the waste heat recovery efficiency of CDQ chamber was calculated and analyzed by thermal balance analysis method and exergy balance analysis method to improve the quality of waste heat recovery.The thermal efficiency and exergy efficiency of CDQ chamber system in actual condition were 79.59% and 84.81% respectively,which were lower than 81.75% and 89.06% of design condition.The exergy loss of internal heat transfer for CDQ chamber was 9.88% in actual condition,which was higher than 5.46% in design condition.The analysis shows that the coke burning rate is the main factor affecting the exergy efficiency of dry quenching furnace system,and the exergy loss of internal heat transfer for dry quenching chamber reduces the waste heat recovery efficiency of dry quenching chamber.Optimizing the composition,content and flow rate of circulating gas is the main measure to improve the energy recovery efficiency of CDQ chamber system.

关 键 词：独立焦化 干熄炉 余热回收 热效率 [火用]效率 热平衡 [火用]平衡 

分 类 号：TQ520.5[化学工程—煤化学工程]