关键词: 浅冷油吸收法, C₁/C₂分离装置, 不饱和干气, 饱和干气, 富烃干气, 乙烯回收率, 乙烷回收率, 综合能耗,

Abstract:

This article introduces a newly built 0.9 MM TPY C₁/C₂ separation unit using shallow cold oil absorption dry gas recovery technology in a certain company, and summarizes the performance calibration results of the unit. Based on the characteristics of dry gas, the six feedstocks of dry gas are classified into three types: unsaturated dry gas, saturated dry gas, and hydrocarbon rich dry gas. With shallow cold oil absorption technology as the core, the above three types of refinery dry gas recovery routes are integrated through system integration to obtain products such as rich ethylene gas, rich ethane gas, light hydrocarbons and hydrogen, organically connecting the refining unit and downstream chemical units. The unit operates stably after operation, with a load rate of 89%. The performance calibration results indicate that the product distribution meets the indicator requirements, and the recovery rates of ethylene and ethane reaching 91.91% and 98.37% respectively, both higher than the performance guarantee values. This indicates that the selection of the process technology route and engineering design of the unit are completely feasible, and it has a good demonstration effect on large-scale complex feedstock C₁/C₂ separation units in China.

Key words: shallow cold oil absorption method, C₁/C₂ separation unit, unsaturated dry gas, saturated dry gas, rich hydrocarbon dry gas, ethylene recovery rate, ethane recovery rate, comprehensive energy consumption,