针对常规气体分馏工艺流程中物料加热过程换热温差大、加热能级严重不匹配的问题，提出一种气体分馏塔物料梯级加热的方法，可大幅度提高该加热环节的效率；在此基础上，针对气体分馏塔塔顶物料散热造成的热能浪费，提出了一种基于第一类吸收式热泵的气体分馏塔物料梯级加热方法，通过回收塔顶物料余热，较大幅度地降低工艺蒸汽的消耗，进而显著提高气体分馏工艺的能源利用效率。对银川某炼油化工公司气体分馏系统进行改造，使该系统的工艺蒸汽消耗量减少22％，每年可节约运行费用398万元。%Aiming at large heat transfer temperature difference and serious mismatch of heating en﹣ergy level in conventional gas fractionation process,a cascade heating method using first type absorption heat pump for gas fractionation column effluent was proposed. By the method the exergy efficiency of gas fractionation process is greatly improved through diminishing heat dissipation in the top of fractiona﹣ting tower,reducing steam consumption and recovering waste heat. After revamping the gas fractiona﹣tion system in a refining & chemical company in Yinchuan,the steam consumption can be reduced by 22%,and save the operating cost about 3. 98 million Yuan annually.
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