Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (6): 1-64.

• PROCESSING •     Next Articles

Application of vacuum flash evaporation-mechanical compression technology in low-temperature heat recovery system of refining and chemical enterprises

Zhang Wenzheng   

  1. SINOPEC Guangzhou Engineering Co., Ltd., Guangzhou, Guangdong 510620
  • Online:2025-06-15 Published:2025-06-20

负压闪蒸－机械压缩技术应用于炼化企业低温热回收系统

张文正   

  1. 中石化广州工程有限公司，广东省广州市 510620
  • 作者简介:张文正，高级工程师，本科，毕业于中国石油大学（华东）热能工程专业，主要从事石油化工热能工程设计工作。联系电话：020-22192805，E-mail：zhangwz.lpec@sinopec.com。
  • 基金资助:
    中国石化科技开发项目（24019B190）

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Abstract:

Taking a certain refining enterprise as an example, the application of vacuum flash evaporation-mechanical compression technology in low-temperature heat recovery system has been discussed. Combining the characteristics of low-temperature heat, under the condition of flash evaporation temperature of 72℃, the recovery and utilization of low-grade heat significantly improve energy utilization efficiency, reduce energy consumption and carbon emissions. The application results show that the 95℃ heat medium water generates 0.45MPa steam through vacuum flash evaporation-mechanical compression, which can reduce the amount of steam purchased by enterprises by 107.75t/h, reduce the consumption of circulating water by 5440t/h, and reduce carbon emissions by 111720TPY. The economic and emission reduction benefits are significant.

Key words: vacuum flash evaporation, mechanical compression, refining and chemical enterprise, low-temperature heat recovery system, steam system, steam cost

摘要：

以某炼化企业为例，探讨了负压闪蒸－机械压缩技术在低温热回收系统的应用，结合炼化企业低温热特点，在闪蒸温度为72℃条件下，通过回收和利用低品位余热，显著提高了能源利用效率，降低了能耗和碳排放。结果表明，95℃热媒水通过负压闪蒸－机械压缩产生0.45MPa蒸汽，可减少企业107.75t/h外购蒸汽量，减少循环水消耗5440t/h，减少碳排放111720t/a，经济效益和减排效益显著。

关键词: 负压闪蒸, 机械压缩, 炼化企业, 低温热回收系统, 蒸汽系统, 蒸汽成本