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›› 2006, Vol. 6 ›› Issue (2): 267-271.

• 系统与集成 • 上一篇    下一篇

乙烯急冷-延迟焦化集成节能流程

曹新波,汤志刚,段占庭,袁乃驹   

  1. 清华大学化工系
  • 出版日期:2006-04-20 发布日期:2006-04-20

An Energy-saving Process Integrated by Ethylene Quenching Section and Delayed Coking Unit

CAO Xin-bo,TANG Zhi-gang,DUAN Zhan-ting,YUAN Nai-ju   

  1. Department of Chemical Engineering, Tsinghua University
  • Online:2006-04-20 Published:2006-04-20

摘要: 提出了一种新的高温气体余热回收方法?利用余热作为吸热化学反应的热源,使余热物理 转化为反应产物所增加的化学 . 作为实例,提出了利用延迟焦化反应回收乙烯裂解气余热的新工艺?乙烯急冷-延迟焦化集成节能流程. 结果表明,对于产60 kt/a乙烯的单台裂解炉,可配套处理量为880 kt/a的延迟焦化装置,并使裂解气急冷过程的 回收率由64.0%提高到74.4%. 该工艺具有设备投资低、稳定运行周期长等优点.

关键词: 余热, 节能, 化学, 乙烯急冷, 延迟焦化

Abstract: A new method involved in waste heat recovery of high temperature gas, using waste heat as the heat source of an endothermic reaction so as to transfer physical exergy of the waste heat into chemical exergy of the reaction products, was presented in this paper. As an example, a novel process, the energy-saving process integrated by ethylene quenching section and delayed coking unit, was introduced to recover waste heat of the ethylene pyrolysis gas by delayed coking reaction. The results indicated that a pyrolyzer with annual ethylene capacity of 60 kt can match a delayed coking unit with annual process capacity of 880 kt. And the exergy recovery rate of the quenching process can be increased from 64.0% to 74.4%. Besides, this integrated process will have the advantages of lower equipment investment, longer steady running period, etc.

Key words: waste heat, energy saving, chemical exergy, ethylene pyrolysis gas quenching, ethylene pyrolysis gas quenching