高校化学工程学报2018，Vol.32Issue(1)：60-66,7.DOI:10.3969/j.issn.1003-9015.2018.01.009
火管式废热锅炉管板冷却室内流动、传热与热应力研究
Fluid Flow, Heat Transfer, and Thermal Stress in Tube Sheet Cooling Chamber of Fire Tube Waster Heat Boiler
摘要
Abstract
Three dimensional flow and heat transfer models were established to study tube sheet cooling chamber of fire tube waste heat boilers. The advantages and disadvantages of two cooling water inlets (lateral and downward inlets) were discussed, and effects of process parameters on the heat transfer of cooling chamber were investigated. Simulation results show that the lateral water inlet generates more eddies near the tube wall, intensifies turbulence, and enhances heat transfer when comparing to those of the downward water inlet. The thermal stress increased by 45.4% when the temperature of syngas flow increased from 1373 to 1623 K, while the syngas flow rate has less effect on heat transfer (thermal stress increased by 18.2% when the syngas flow rate increased from 70% to 120%). The thermal stress of the tube wall can be decreased by increasing the inlet temperature of cooling water (it decreased by 11.4% when the temperature increased from 430 to 520 K). Therefore, reduce of syngas flow temperature and increase of cooling water temperature can help to maintain equipment long-term operation.关键词
火管式废热锅炉/管板冷却室/强化传热/热应力Key words
fire tube waste heat boiler/tube sheet cooling chamber/heat transfer enhancement/thermal stress分类
化学化工引用本文复制引用
方浩,代正华,许建良,梁钦锋,于广锁,王辅臣..火管式废热锅炉管板冷却室内流动、传热与热应力研究[J].高校化学工程学报,2018,32(1):60-66,7.基金项目
国家自然科学基金(21776087) （21776087）
国家重点研发计划课题(2017YFB0602604) （2017YFB0602604）
山西省煤基重点科技攻关项目(MH2014-01) （MH2014-01）
中央高校基本科研业务费专项资金(222201717004). （222201717004）
