某天然气液化工艺冷箱积液分析及排除

Analysis and elimination of cold box abnormal liquid-flooding innatural gas liquefaction process

关键词:  冷箱  积液  液化工艺  混合制冷剂  温度梯度 

Key words:  cold box  liquid-flooding  liquefaction process  mixed refrigerant  temperature gradient

摘要:

某工艺是一套国内外应用广泛的天然气液化工艺技术,具有工艺流程简单、布置紧凑、设备数量少等优点,但该工艺因冷箱(板翅式换热器)容易积液,导致装置减产或生产中断的问题。描述了珠海天然气液化装置冷箱积液时的工艺现象(压力、液位、压差、温度等),分析了产生积液的原因,并提出了处理方法,为同类装置及时判断及科学处理冷箱积液问题提供了参考。 

Abstract:

The MRC technology is a widely used natural gas liquefaction technology, and it has the advantages of simple process, compact layout, less equipment, etc., but the liquid-flooding phenomenon of cold box (plate-fin heat exchanger) occurs easily, which leads to the yield reduction or production interruption. This article describes the cold box liquid-flooding phenomenon of Zhuhai natural gas liquefaction plant, such as pressure, liquid level, differential pressure and temperature, analyses the reasons and proposals treatment methods. It is helpful for similar LNG plants to judge and handle the cold box liquid-flooding problem in time.