燃料与化工 ›› 2019, Vol. 50 ›› Issue (4): 13-17.

• 煤焦技术 • 上一篇    下一篇

焦炉上升管换热器综合传热系数的计算与讨论

黄海清1  邹声华1  沈毅2  赵勇2   

  1. 1.湖南科技大学土木工程学院, 湘潭411201;2.湖南华菱节能环保科技有限公司, 长沙411100
  • 出版日期:2019-07-23

Calculation and discussion for comprehensive heat transfer coefficient of riser heat exchanger

Huang Haiqing1  Zou Shenghua1  Shen Yi2  Zhao Yong2   

  1. 1.School of Civil Engineering, Hunan University of Science and Technology,Xiangtan 411201,China;
    2.Hunan Hualing Energy Saving and Environmental Protection Technology Co.,Ltd.,Changsha 411100,China
  • Online:2019-07-23

摘要:

计算了焦炉上升管换热器在1个炼焦周期的对流传热量和辐射传热量,换热器的平均综合传热系数为52.8 W/(m2·K)。整个炼焦过程荒煤气为流动充分发展的阶段,辐射传热量与荒煤气的流动状态无关。在炼焦后期,荒煤气流量下降,传热量下降,会造成上升管内壁温度发生变化,可以通过强化荒煤气与上升管内壁的辐射传热和适当提高荒煤气流量来减缓内壁温度发生突变的现象。

Abstract:

The convective heat transfer and radiation heat transfer of coke oven riser heat exchanger are calculated in one coking cycle.The averagecomprehensive heat transfer coefficient of heat exchanger is 52.8 W/(m2·K).In the whole coking process, the gas flow is fully developed, andthe radiation heat transfer has nothing to do with the flow state of the gas.In the later period of coking, the decrease of gas flow rate andthe decrease of heat transfer will result in the change of the wall temperature of the ascension pipe.In the late coking period, the sudden change of temperature in the inner wall can be reduced by strengthening the radiation heat transfer between the crude gas and the inner wallof the riser and increasingthe flow rate of the crude gas properly.

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