摘要
某石化公司催化裂化装置主风机防喘振误动作事故原因是仪表故障,出现假信号,使主风机工作点进入喘振区,导致防喘振阀打开。为提高主风机防喘振控制的可靠性,提出为主风机出口压力增加1个独立测点,将取值方式由2取高改为3取中。对于难以增加独立测点的主风机入口喉部差压,对其变化率增加报警功能,防止主风机防喘振误动作。同时对仪表防冻防凝方案提出了建议。
The causes of anti-surge system malfunction in catalytic cracking unit of a petrochemical company were analyzed.The conclusion wasthat,due to instrument fault,the false signal appeared to make the working point of the main blower entering into the surge zone and caused the anti-surge valve to open.In order to improve the reliability of the main blower anti-surge system,it was proposed to increase an independent measurement point of the main blower,and changedthe value mode from height out of 2 to middle out of 3.Themain blower inlet was difficult to increase the independent measurement point and thus an alarm function should be added,which aimed to prevent anti-surge malfunction and the anti-freezing and anti-coagulation of instruments.
作者
李忠博
Li Zhongbo(PetroChina Jinzhou Petrochemical Company,Jinzhou,121000,China)
出处
《炼油与化工》
2020年第3期36-38,共3页
Refining And Chemical Industry
关键词
主风机
防喘振
误动作
3取中
变化率
main blower
anti-surge
malfunction
middle out of 3
change rate
