摘要
水煤浆气化炉在操作参数大幅变化的异常工况下运行时,气化炉温度大幅波动,合成气中可能含有氧气,不利于工厂安全稳定运行。基于气化炉流场分布,在Unisim Hysys软件中建立了水煤浆气化炉的反应器网络模型,以此为基础开发了气化炉的动态模型,研究了煤浆流量和煤浆浓度大幅降低两种异常工况下,气化炉出口合成气温度和组成的动态响应过程。研究结果表明:当煤浆流量降低30%(wt)以上时,气化炉温度超过2000℃,同时合成气中氧气含量不断升高;当煤浆浓度降低到35%(wt)时,合成气中氧气含量达到0.2%(v)左右。实际生产过程中应尽量避免煤浆流量和煤浆浓度的大幅变化。
Large variation of coal gasifier operation conditions can lead to substantial temperature change andpossible oxygen existence in outlet syngas,which is harmful to safe and stable plant operation.A reactornetwork model for coal water slurry(CWS)gasifier was developed using Unisim Hysys based on the velocityprofile of the gasifier,and a dynamic model was also built based on the reactor network model.The dynamicresponses of temperature and outlet syngas composition regarding to CWS feed rate and concentration reductionwere studied.The results show that the outlet syngas temperature is up to2000℃when the CWS feed ratereduces over30%(wt)and the oxygen concentration increases observably.Meanwhile,the oxygen concentrationof the outlet syngas is about0.2%(v)when the CWS concentration reduces to35%(wt).These results indicatethat large variation in CWS feed rate and concentration should be avoided.
作者
张强
孙峰
代正华
许建良
刘海峰
于广锁
ZHANG Qiang;SUN Feng;DAI Zheng-hua;XU Jian-liang;LIU Hai-feng;YU Guang-suo(State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering,Qingdao 266071, China;Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2017年第4期856-862,共7页
Journal of Chemical Engineering of Chinese Universities
基金
化学品安全控制国家重点实验室项目(SKL-028)
上海市科学技术委员会项目(15DZ1200802)
山西省煤基重点科技攻关项目(MH2014-01)
关键词
水煤浆气化炉
异常工况
反应器网络模型
动态模拟
coal water slurry (CWS) gasifier
abnormal operation conditions
the reactor network model
dynamic simulation
