炼油技术与工程 ›› 2021, Vol. 51 ›› Issue (10): 25-29.

• 加工工艺 • 上一篇    下一篇

膜分离技术在炼油厂氢气回收中的应用研究*

王园园1, 杨晓航1, 郭明钢2   

  1. 1.盘锦浩业化工有限公司,辽宁省盘锦市 124123;
    2.大连理工大学盘锦产业技术研究院,辽宁省盘锦市 124221
  • 收稿日期:2021-04-12 修回日期:2021-07-07 出版日期:2021-10-15 发布日期:2021-11-15
  • 作者简介:王园园,工程师,硕士研究生,2019年毕业于沈阳工业大学化学工程专业,主要研究方向为炼油技术节能降耗。联系电话:13125688729,E-mail:1052014834@qq.com。
  • 基金资助:
    *辽宁省化学助剂合成与分离省重点实验室开放课题基金资助项目(ZJKF2013)。

Application of membrane separation technology in hydrogen recovery in refinery

Wang Yuanyuan1, Yang Xiaohang1, Guo Minggang2   

  1. 1. Panjin Haoye Chemical Co., Ltd., Panjin, Liaoning 124123;
    2. Panjin Industrial Technology Institute, Dalian University of Technology, Panjin, Liaoning 124221
  • Received:2021-04-12 Revised:2021-07-07 Online:2021-10-15 Published:2021-11-15

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摘要： 为解决某炼油厂氢气利用率低的问题,通过分析氢气管网平衡的实际情况提出改进措施:新增一条重整副产氢气直供柴油改质装置管线,并新增一条管线将重整产氢与氢气管网中氢气混合后送入加氢裂化装置;新建膜分离装置,回收柴油改质低分气、加氢裂化低分气、加氢裂化干气、催化裂化干气、气柜气中的氢气。优化后氢气回收率达到88%以上,氢气利用率由原来的81.96%增大至95.15%。同时考察了膜分离单元M-102进膜压力、膜面积的改变对氢气回收率、纯度以及经济效益的影响。结果表明:氢气回收率和纯度都随着进膜压力和膜面积的增大而提高,当M-102的进膜压力为1.34 MPa时,最优膜面积为3 200 m2,每年可回收8.574 4×107 m3氢气,年经济效益为4 612万元。

关键词: 炼油厂, 氢气, 回收与利用, 氢气平衡, 分离膜, 经济效益, 进膜压力, 膜面积

Abstract: In order to solve the problem of low utilization rate of hydrogen in a refinery, the improvement measures are put forward by analyzing the actual situation of hydrogen pipe network balance as follows: adding a new pipeline for direct supply of reforming by-product hydrogen to diesel upgrading unit, and adding a new pipeline for mixing reforming hydrogen with hydrogen in hydrogen pipe network and entering hydrocracking unit; building a new membrane separation unit to recover hydrogen of gas from low pressure separator of diesel upgrading unit, gas from low pressure separator of hydrocracking unit, hydrocracking dry gas, catalytic dry gas and gasholder gas. After optimization, the recovery rate of hydrogen is over 88%, and the utilization rate of hydrogen increases from 81.96% to 95.15%. The results show that the recovery rate and purity of hydrogen increase with the increase of membrane inlet pressure and membrane area. When the inlet pressure of M-102 is 1.34 MPa, the optimal membrane area is 3,200 square meters, 85.744 million cubic meters hydrogen can be recovered every year, and the annual economic benefit is 46.12 million yuan.

Key words: refinery, hydrogen, recovery and utilization, hydrogen balance, membrane of separation, economic benefit, membrane inlet pressure, membranes area