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天然气是以低分子饱和烃为主的烃类气体与少量非烃类气体组成的混合气体,是现代生活的一种清洁燃料,是地球不可再生的资源和人类极为宝贵的财富。天然气中含有大量的水蒸气,在管输时不仅减少了管线的输送能力和气体热值,增加了管线腐蚀,而且当输送条件(压力、温度)发生变化时,水蒸气从天然气中析出,易形成天然气水化合物,堵塞管道、增加管路压降,给天然气处理装置安全平稳运行和外输供气带来很大危害。因此,在天然气加工及轻烃回收装置中,减少脱水系统冻堵显得尤为重要。
Natural gas is a mixed gas composed of low-molecular-saturated hydrocarbons and a small amount of non-hydrocarbon gases. It is a clean fuel in modern life, a non-renewable resource on Earth and an extremely valuable asset to mankind. Natural gas contains a large amount of water vapor, which not only reduces the pipeline’s conveying capacity and gas calorific value during pipe transportation, but also increases pipeline corrosion. When the conditions of transportation (pressure and temperature) change, water vapor is precipitated from natural gas and easily The formation of natural gas hydrates, plugging pipes, increasing pipeline pressure drop, to the natural gas processing unit safe and stable operation and the external gas supply bring great harm. Therefore, in the natural gas processing and light hydrocarbon recovery unit, it is important to reduce the freeze-block in the dehydration system.