石油化工设计 ›› 2025, Vol. 42 ›› Issue (3): 44-48.

• 工程应用 • 上一篇    下一篇

替代氨冷的新型连续重整再接触工艺研究

闫意舒,蔡达理,魏志强   

  1. 中国石化工程建设有限公司,北京市 100101
  • 收稿日期:2025-04-10 出版日期:2025-08-25 发布日期:2025-08-25
  • 作者简介:闫意舒,女,2023年毕业于中国科学院大学化学工程专业,博士,工程师,主要从事重整装置设计与改造研究。联系电话:010-84878208。

Study on New Ammonia-free Refrigeration Processes for Recontacting Section in Continuous Catalytic Reforming Units

Yan YishuCai DaliWei Zhiqiang   

  1. SINOPEC Engineering Incorporation, Beijing, 100101
  • Received:2025-04-10 Online:2025-08-25 Published:2025-08-25

摘要:

针对连续重整装置再接触工艺流程中氨制冷氨回收处理难等问题,提出了再接触吸收塔+溴化锂制冷和低温溴化锂制冷两种替代氨制冷的新工艺。考察了2种新工艺的能耗、CO2排放量、投资和技术经济性,结果表明,与传统工艺相比,2种新工艺均可保证再接触后的氢气纯度,并能有效利用装置低温余热,使装置用电量可降低约40%,能耗降低约2%,节能降碳效果显著,用1-3a即可回收项目静态投资,经济效益可观。

关键词: 连续重整, 再接触, 低温热, 新工艺, 溴化锂制冷, 吸收塔, 节能降碳

Abstract:

In response to the ammonia recovery difficulties in ammonia refrigeration system in the recontacting section of continuous catalytic reforming units, this study proposes two new ammonia-free refrigeration processes, i.e., the recontacting absorber combined with lithium bromide refrigeration and the direct application of low-temperature lithium bromide refrigeration. The energy consumption, CO? emissions, investment and technical-economic performance of the two new processes were evaluated. The results show that, compared to the conventional process, both the two new processes can maintain the hydrogen purity after the recontacting while effectively utilizing the low-temperature waste heat from the unit. The electricity consumption and energy consumption of the unit can be reduced by around 40% and 2%, respectively. Remarkable saving energy and carbon reduction effect can be achieved. The static investment of project can be recovered in 1 to 3 years, indicating significant economic benefits.

Key words: continuous catalytic reforming, recontacting, low temperature heat, new process, lithium bromide refrigeration, absorber, energy saving and carbon reduction