煤直接液化减压塔进料球阀失效分析及修复

摘要

介绍了煤直接液化工艺流程及其特点。根据减压塔进料球阀的工作参数和功能作用，比照其失效形貌，分析了该球阀发生磨损失效的原因，制定了相应的拆解和修复方案。对修复后的球阀进行检查和试验，以满足标准规范的要求。最后对该球阀的优化运行给出了建议。%The technological process and characteristics of the direct coal liquefaction are introduced. In consideration of the working parameters and functions as well as the failure morphology of the feedstock ball valve in the vacuum tower, the reason of the wear failure is analyzed and the corresponding disassembly and repair scheme are proposed. Then the examinations and tests are performed to meet the requirements of the standards. At last, the advices on the optimal operation are given.