最大规模浅冷油吸收法C_(1)/C_(2)分离技术工业应用实践

Large scale industrial application practice of C_(1)/C_(2)separation technology by shallow cold oil absorption method

某公司采用浅冷油吸收法干气回收专利技术新建了一套C_(1)/C_(2)分离装置,以正丁烷为吸收剂吸收干气中的碳二馏分,再以重石脑油为吸收剂回收燃料气中夹带的碳四馏分,得到富乙烷气、轻烃和粗氢气分别送入乙烯装置、液化气分离装置和PSA装置。该分离装置规模达到了1.6 Mt/a,可以实现将20 Mt/a炼化一体化项目中炼油装置的干气全部加工。装置投产运行1年后进行了标定,结果显示,乙烷回收率和纯度分别达到了92.7%和93.7%,产品分布良好,综合能耗达标,表明该技术的选择成熟可靠,值得推广应用。

A company has built a new set of C_(1)/C_(2)separation unit using the patented shallow cold oil absorption method for dry gas recovery technology licensed by Beijing Research Institute of Chemical Industry,which uses n-butane as the absorbent to absorb C_(2)fraction in the dry gas,and then uses heavy naphtha as the absorbent to recover C4 fractions entrained in the fuel gas to obtain ethane-rich gas,light hydrocarbon and crude hydrogen,which are sent to the ethylene unit,liquefied gas separation unit and PSA unit,respectively.The scale of the unit reaches 1.6 Mt/a,which can process all the dry gas of the refining unit in the 20 Mt/a refining and chemical integration project.The unit runs stably after startup,and is calibrated after one year of operation.The results show that the recovery rate and purity of ethane reaches 92.7%and 93.7%,respectively.The product distributes well,and the comprehensive energy consumption meets the standard.It is verified that this technology is mature and reliable,and it is worthy of popularization and application.