黑水闪蒸系统控制阀碳化钨阀芯设计探讨

摘要

The black water control valve is one of the critical valves in water-coal slurry gasification.Its running reliability affects efficiency of coal gasification plant directly.Due to strong media corrosive,poor working condition,and occurrence of vibration and flashing,which leads Tungsten carbide plugs to be failed or damaged unexpectedly.The black water treatment process in coal chemical industry,and control valve structure characteristics are introduced comprehensively.The common failure forms of tungsten carbide plugs and main influence factors are summarized and discussed.From aspects of material selection and structure design,key points on designing tungsten carbide plugs are expounded deeply.It would be a great guideline and reference to design engineer to improve Tungsten carbide service life,and ensure stable process operation.%黑水控制阀是水煤浆气化工艺关键阀门之一,其运行的可靠性直接影响了煤气化装置的运行效率.由于工作介质具有很强的腐蚀性,工况恶劣,且伴有闪蒸现象和振动发生,导致黑水控制阀碳化钨阀芯会发生难以预测的失效损坏.全面介绍了煤化工黑水处理工艺以及黑水控制阀的结构特点,总结分析了黑水控制阀碳化钨阀芯的常见失效形式及其主要影响因素,并着重从材料及结构设计角度,深入探讨了碳化钨阀芯的设计要点,对工程技术人员正确选择黑水控制阀,提高碳化钨阀芯使用寿命,保证工艺的稳定运行,具有很大的借鉴意义.