加氢装置中紧急放空环节气动切断阀的应用

Application of Pneumatic On-off Valve in Emergency Blow-down of Hydrogenation Installation

加氢反应是在高温、高压环境下进行,并且有易燃易爆气体参与的过程,所以安全措施至关重要。紧急放空是加氢装置安全措施中非常重要的一个环节,系统在着火、泄漏、超温等紧急情况下,或者在循环氢压缩机停机时,为了降低系统内温度并且减缓或停止反应,需要开启紧急放空装置。从工程角度系统地分析了紧急放空气动切断阀选型、双电磁阀实现形式以及在紧急放空情况下的联锁逻辑和操作。

Hydrogenation reaction is conducted under high temperature and high pressure with inflammable and explosive gas in the process. Safety countermeasures are very important. Emergency blow-down plays a very important role in safety system of hydrogenation reaction. Emergency blow-down installation needs to be started when the reaction is in dangerous situation such as catching fire, leaking, over temperature, or recycle hydrogen compressor shutdown to slow down or stop reaction and make sure that temperature is under control. Selection of pneumatic on-off valve type, realization form of double solenoid valve, interlock logic and operation under emergency blow-down condition are analyzed systematically from the point of engineering.