轻烃回收DHX工艺优化及应用
Optimization and Application of DHX Process for Light Hydrocarbon Recovery
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- 引用格式:
-
肖乐,尹奎,吴明鸥,涂洁,王刚,马枭. 轻烃回收DHX工艺优化及应用[J].天然气与石油,2020,38(5):36-42.doi:10.3969/j.issn.1006-5539.2020.05.007
Xiao Le, Yin Kui, Wu Ming'ou , Tu Jie, Wang Gang, Ma Xiao.Optimization and Application of DHX Process for Light Hydrocarbon Recovery[J].Natural Gas and Oil,2020,38(5):36-42.doi:10.3969/j.issn.1006-5539.2020.05.007
- DOI:
- 10.3969/j.issn.1006-5539.2020.05.007
- 作者:
- 肖乐1，尹奎1，吴明鸥2，涂洁1，王刚1，马枭2
Xiao Le1, Yin Kui1, Wu Ming'ou 2, Tu Jie1, Wang Gang1, Ma Xiao2
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司, 2. 中国石油西南油气田公司天然气研究院
China Petroleum Engineering & Construction Corp. Southwest Company, Chengdu, Sichuan, 610041, China 2. Research Institute of Natural Gas Technology，PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, 610213, China
- 关键词:
- 轻烃回收;DHX工艺;优化;C3收率;LPG
Light hydrocarbon recovery; DHX process; Optimization; C3 recovery rate; LPG
- 摘要:
- 为将国外某轻烃回收厂处理规模扩能至283×104 m3/d(100MMSCFD),同时满足C3收率≥95%、C4收率≥98.5%、利用部分己建设备设施的要求,需对该厂原有的油吸收+丙烷预冷+J-T阀节流制冷工艺进行优化。通过轻烃回收DHX工艺对比,选用了一种丙烷制冷+膨胀机制冷+脱乙烷塔顶气冷凝回流的DHX工艺。该工艺实现了脱乙烷塔顶气两步冷却,有效提高了C3收率。经工艺优化后,轻烃回收厂C3收率由原来的60.1%提高至95.5%,C4收率由原来的61.3%提高至99.7%,LPG产量为210 t/d,增产约130 t/d,达到设计值要求,经济效益显著提高。该工艺方案可为类似工程的设计及优化提供参考。
A process optimization has been applied on an existing oil absorption, propane pre-cooling and J-T valve throttling refrigeration process to upgrade the capacity of an overseas light hydrocarbon recovery plant to 2.83 million m3/d (100MMSCFD), and meet the requirement of C3recovery rate ≥ 95%, C4recovery rate ≥ 98.5%,while utilizing parts of the equipment and facilities of existing plant.Compared with DHX process for light hydrocarbon recovery, a DHX process with propane refrigeration, expander refrigeration and deethanizer overhead gas condensation and reflux was selected.This process realizes two-step cooling of the overhead gas of the deethanizer,and effectively improves the C3recovery rate.After process optimization, the C3recovery rate of the light hydrocarbon recovery plant was increased from the 60.1% to 95.5%,C4recovery rate was increased from the 61.3% to 99.7%,LPG production rate improved to 210t/d,with increasing approximately 130t/d. The design value requirements have been met, and the economic benefits have been significantly improved.The process is a good reference for the design and optimization of similar projects.
