水煤浆气化烧嘴冷却水腔应力的有限元分析  

Finite Element Analysis of Cooling Water Chamber Stress of Coal Water Slurry Gasification Burner

作　　者：李兵科[1] 于晓东 谭永华[2] 钱永康[1] Li Bingke;Yu Xiaodong;Tan Yonghua;Qian Yongkang(Beijing Aerospace Propulsion Institute,Beijing 100076,China;Academy of Aerospace Propulsion Technology,Xi'an Shaanxi 710100,China)

机构地区：[1]北京航天动力研究所,北京100076 [2]航天推进技术研究院,陕西西安710100

出　　处：《煤化工》2020年第5期25-31,共7页Coal Chemical Industry

摘　　要：以水煤浆气化炉工艺烧嘴冷却水腔为研究对象,基于ANSYS建立了冷却水腔的三维有限元模型,结合热分析,采用热-力耦合方法,计算了烧嘴冷却水腔在纯热载荷和热-力耦合作用下的热应力分布,并对其强度进行了分析。在热分析中考虑了炉内高温烟气的辐射换热和对流换热,并考虑了冷却水的强制对流换热。计算分析结果表明,最大的热应力位于冷却水腔与烧嘴外喷嘴出口处的倒圆角处的环带,该环带处极易发生应力疲劳破坏,与实际烧嘴外喷嘴裂纹出现的位置相符度很高,验证了该数值模拟模型的正确性。Taking the cooling water chamber of coal water slurry gasifier process burner as the research object,a three-dimensional finite element model of the cooling water chamber was established based on ANSYS.Combined with thermal analysis and thermal mechanical coupling method,the thermal stress distribution of the burner cooling water chamber under pure thermal load and thermal mechanical coupling was calculated,and its strength was analyzed.In the thermal analysis,the radiation and convection heat transfer of high temperature flue gas and forced convection heat transfer of cooling water were considered.The results of calculation and analysis showed that the maximum thermal stress was located in the ring at the fillet of the cooling water chamber and the nozzle outlet of the burner,where the stress fatigue failure was easy to occur,which was in good agreement with the actual crack location.This validated the correctness of the numerical simulation model.

关 键 词：水煤浆气化 工艺烧嘴 冷却水腔 应力 有限元分析 纯热载荷 热-力耦合 

分 类 号：TQ545[化学工程—煤化学工程]