IC200UDD104
IC200UDD104
图3：加氢工艺流程示意图
冷高压分离器D-105液位是通过控制LV11201A与LV11201B两调节阀来实现的，正常生产时，两调节阀互为备用。为防止冷高分D-105液位压空，造成高低压互串，D-105液位底设两个联锁切断阀XV11201和XV11201A，D-105液位设三个液位远传仪表LI11201、LI11202、LI11203进行三取二联锁，当LI11201、LI11202、LI11203有两个低于20%，将联锁关闭XV11201和XV11201A，同时关闭D-105的液位控制阀LV11201A与LV11201B，防止高压介质串入低压引发事故。
IC200UDD104
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