摘要
旋转填料床(RPD)是一种利用强大离心力促使重力加速度g增大以强化气液传质的设备。由于描述常规填料接触塔中气液吸收过程的理论与模型基本都不适用于RPD,故多年来虽开展了大量RPD相关研究,但其实际应用却十分有限。以往的试验数据表明:RPD作为强化传质设备,不适用于净化气TEG深度脱水和原料天然气选吸脱硫。用RPD替代SCOT法尾气处理工艺中的选吸脱硫塔以进一步降低CO2共吸收率的思路是正确的,但必须同时严格控制贫液质量和贫液入塔温度。RPD的商业化应用当前存在两方面风险:实际风险主要是旋转设备机械设计的可靠性,包括密封、轴承和转子的稳定性;潜在风险则来自对过程原理还缺乏深刻了解。
Rotating packed bed(RPB) is a kind of equipment which can intensify gas-liquid mass transfer by utilizing strong centrifugal force to prompt gravity g to magnify. Theories and models describing gas-liquid absorption process in conventional packing contact tower are basically not suitable for RPB. Even a lot of researches have been conducted in recent years, but up to now its practical application is very limited. Experimental data show that as a kind of intensified mass transfer equipment, RPB is not suitable for TEG deep dehydration of purified gas and selective desulfurization of feed gas. It is a good idea to replace selective desulfuration tower with RPB in SCOT tail gas treatment to reduce CO2 co-absorption rate, but lean solution quality and solution temperature must be strictly controlled. At present, such two kinds of risks way exist in PRB commercial application as real risks and potential risks. The former mainly results from reliability of rotating equipment, including stability of seal, bearings and rotor and the latter mainly results from lack of deep understanding in principle of transfer processes.
出处
《天然气与石油》
2014年第1期53-57,10-11,共5页
Natural Gas and Oil
关键词
旋转填料床
超重力技术
选吸脱硫
尾气处理
深度脱水
Rotating packing bed(RPD)
High gravity technology
Selective desulfurization
Tail gas treatment
Deep dehydration
作者简介
陈赓良（1940-）,男,上海人,教授级高级工程师,主要从事天然气处理与加工科研工作.
