Technip制氢工艺多工况原料气压缩机故障原因分析及解决方案

REASON ANALYSIS ON FAILURE OF MULTI-CONDITION FEED GAS COMPRESSOR FOR HYDROGEN PRODUCTION PROCESS AND THE SOLUTION

福建某石化企业40×10^(3)m ^(3)/h(标准状态)制氢装置的2台原料气往复压缩机(25-K-111A/B)在正常生产运行期间周期性发生设备故障,只能采用定期切换备用机交替维修的方式维持安全生产。针对上述问题,结合生产运行情况复算多工况条件下机组性能参数,分析原因并排除故障。结果表明,制氢装置在液体进料工况下长时间运行,偏离了原设计运行主工况,且该工艺流程中配置的2台多工况压缩机组也满足不了液体进料工况条件下长时间运行的要求。压缩机在该工况运行期间,十字头销荷载反向角等关键性能参数偏离机组设计的要求,造成机体主要零部件受损。经比选,采用整机返厂、整体原样修复并新增2台撬装小流量压缩机组以满足液体进料工况配氢的解决方案,既准确解决了机组故障,又完善优化了工艺流程。该案例可为制氢装置同类设备问题的解决提供借鉴。

Two feed gas reciprocating compressors(25-K-111A/B)in a 40×10^(3)Nm^(3)/h hydrogen production plant of a petrochemical enterprise in Fujian Province has periodic equipment failures during normal production and operation,so it is only necessary to switch the standby machine for alternate maintenance regularly to maintain safe production.Aiming at the above problem,this paper analyzed the causes of the failures and eliminated the failures through recalculating the unit performance parameters under multiple working conditions in combination with the production and operation conditions.The results show that the hydrogen production unit deviated from the original designed main operating conditions after it had run for a long time under liquid feed conditions.Besides,the two multi-condition compressor units configured in the process flow couldn't meet the requirements of long-term operation under the condition of liquid feeding.During the operation of the compressor under this working condition,the key performance parameters such as the crosshead pin load reversal angle deviated from the requirements of the unit design,resulting in damage to the main components of the body.After comparison and selection,the whole machine was returned to the factory and was repaired as it was;two skid-mounted small flow compressor units were added to meet the liquid feeding conditions for hydrogen distribution.This solution not only solved the unit failure accurately,but also optimized the process flow.This case can provide reference for solving the problems of similar equipment in hydrogen production plants.