利用高压LNG冷能分离轻烃的工艺流程
Process flow for separating light hydrocarbons using high-pressure LNG cold energy
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- 引用格式:
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白宇恒,傅敬强,李龙,汪贵,王科,田静,刘家洪.利用高压LNG冷能分离轻烃的工艺流程[J].天然气与石油,2025,43(4):32-37.doi:10.3969/j.issn.1006-5539.2025.04.005
BAI Yuheng, FU Jingqiang, LI Long, WANG Gui, WANG Ke, TIAN Jing, LIU Jiahong.Process flow for separating light hydrocarbons using high-pressure LNG cold energy[J].Natural Gas and Oil,2025,43(4):32-37.doi:10.3969/j.issn.1006-5539.2025.04.005
- DOI:
- 10.3969/j.issn.1006-5539.2025.04.005
- 作者:
- 白宇恒1 傅敬强2 李龙1 汪贵1 王科1 田静1 刘家洪1
BAI Yuheng1, FU Jingqiang2, LI Long1, WANG Gui1, WANG Ke1, TIAN Jing1, LIU Jiahong1
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司, 四川 成都 610041; 2. 中国石油西南油气田公司, 四川 成都 610051
1. CPECC Southwest Company, Chengdu, Sichuan, 610041, China; 2. PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, 610051, China
- 关键词:
- LNG富液;轻烃回收;高压LNG;冷能利用
Rich LNG liquid; Light hydrocarbon recovery; High-pressure LNG; Cold energy utilization
- 摘要:
- 液化天然气(Liquefied Natural Gas,LNG)蕴含了大量冷能,利用这部分冷能以很低的能耗即可获得高附加值的轻烃产品,具有良好的社会效益和经济效益。为匹配现有LNG接收站闪蒸气(Boil-off Gas,BOG)再冷凝回收工艺流程,将LNG中所含轻烃全部回收,提出了一种以高压LNG为原料,利用LNG冷能分离轻烃的新工艺流程。采用商业工艺计算软件,以某LNG接收站富液为例进行了模拟计算,并对关键运行参数进行了分析研究。研究结果表明,采用新工艺流程,轻烃回收率高达98.77%,单位轻烃回收能耗仅594 MJ/t,新工艺系统可更好匹配现有LNG接收站BOG再冷凝回收工艺流程及运行方式,各项指标均达到了国内外先进水平。研究结果可为现有LNG接收站扩建轻烃回收装置提供借鉴。
LNG contains a large amount of cold energy. Utilizing this cold energy can produce high-added-value light hydrocarbon products with very low energy consumption, offering significant economic and social benefits. In order to match the existing BOG re-condensation recovery processes in LNG receiving terminals and completely recover all light hydrocarbons contained in LNG, a new process using high-pressure LNG as feedstock to separate light hydrocarbons by utilizing LNG cold energy is proposed. Commercial process simulation software was used to conduct calculations using rich LNG liquid from a specific LNG receiving terminal as an example, and key operating parameters were analyzed and studied. The results show that the new process system achieves a high light hydrocarbon recovery rate of 98.77%, with unit energy consumption of only 594 MJ/t for light hydrocarbon recovery. The new process system can better match the existing BOG re-condensation recovery process flow and operation mode of LNG receiving terminals, with all performance indicators reaching advanced level at home and abroad. The research results can provide valuable reference for the expansion of the light hydrocarbon recovery units at LNG receiving terminals.
