乙烯装置利用LNG冷能冷系统开车及故障分析

乙烯工业 ›› 2023, Vol. 35 ›› Issue (4): 23-31.

乙烯装置利用LNG冷能冷系统开车及故障分析

陈德明，董子伟，侯楠

中国石油化工股份有限公司天津分公司，天津 300271

收稿日期:2022-07-10 修回日期:2023-09-10 出版日期:2023-12-25 发布日期:2023-12-19
作者简介:陈德明，男，1992 年毕业于天津石化职工大学，主要从事乙烯装置管理工作，高级工程师。

Start-up of Cold Separation System in Ethylene Plant Based on LNG Cold Energy Utilization and the Failure Analysis

Chen Deming, Dong Ziwei, Hou Nan

SINOPEC Tianjin Company, Tianjin, P.C.300271

Received:2022-07-10 Revised:2023-09-10 Online:2023-12-25 Published:2023-12-19

摘要/Abstract

摘要：

介绍了国内首套基于LNG冷能利用的乙烯工艺，采用甲醇作为中间冷媒进行间接换热，实现LNG接收站内冷量和乙烯装置之间冷热互供。冷媒温度的梯级利用，替代了原丙烯及乙烯制冷压缩机的部分用户，极大地降低了制冷压缩机的功耗，分离单元能耗降低约为11％，乙烯装置的综合能耗（标油）低至497 kg/t乙烯。甲醇冷媒系统将是乙烯装置平稳运行的关键所在，通过对冷媒开车和典型的事故工况进行分析，为乙烯装置运行提供思路。

关键词: LNG冷能 , 甲醇冷媒 , 开车 , 故障分析

Abstract:

This paper introduces the first ethylene process in China based on LNG cold energy utilization, which uses methanol as an intermediate refrigerant for indirect heat exchange, thereby realizing the mutual supply of cold and heat between the cooling capacity in the LNG receiving station and the ethylene plant. The cascade utilization of refrigerant temperature replaces some users of the original propylene and ethylene compressor, greatly reducing the power consumption of refrigeration compressors. The energy consumption of separation system is reduced by about 11％, and the comprehensive energy consumption of ethylene plant is as low as 497 kgEO/t ethylene. The methanol refrigerant system will be the key to the smooth operation of ethylene plant. Through the analysis of refrigerant start-up and typical accident conditions, some ideas are provided for the operation of ethylene plant.

Key words: LNG cold energy, methanol refrigerant, start-up, failure analysis

陈德明, 董子伟, 侯楠. 乙烯装置利用LNG冷能冷系统开车及故障分析[J]. 乙烯工业, 2023, 35(4): 23-31.

Chen Deming, Dong Ziwei, Hou Nan. Start-up of Cold Separation System in Ethylene Plant Based on LNG Cold Energy Utilization and the Failure Analysis[J]. Ethylene Industry, 2023, 35(4): 23-31.

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