石油化工设计 ›› 2025, Vol. 42 ›› Issue (1): 1-5.doi: 10.3969/j.issn.1005-8168.2025.01.001

• 设计技术 •    

天然气液化BOG提氦和冷能回收利用方案及经济性分析

任金平1,2,芦娅妮1,2,杨艳艳1,海明莲1,陈兵3,于春柳1,2,张琪1,2   

  1. 1.陇东学院石油化工学院,甘肃 庆阳 745000;
    2.甘肃省陇东油气资源高效利用重点实验室,甘肃 庆阳 745000;
    3.宁夏天利丰能源利用有限公司,宁夏 吴忠 751000
  • 发布日期:2025-03-03
  • 作者简介:任金平,男,硕士,副教授,研究方向为低温贮运技术与设备
  • 基金资助:
    基金项目:甘肃省青年科技基金计划项目(22JR5RM214),庆阳市青年科技基金项目(QY-STK-2023B-118);庆阳市科技计划项目(QY-STK-2022B-149,QY-STK-2022A-008);陇东学院青年基金项目(XYSK2219)。

Economic Analysis of LNG Boil-off Gas Helium Extraction and Cold Energy Recycling

Ren Jinping1,2, Lu Yani1,2, Yang Yanyan1, Hai Minglian1, Chen Bing3, Yu Chunliu1,2, Zhang Qi1,2   

  1. 1. College of Petroleum and Chemical Engineering, Longdong University, Qingyang, Gansu, 745000;
    2. Gansu Key Laboratory of Efficient Utilization of Oil and Gas Resources in Longdong, Qingyang, Gansu, 745000;
    3. Ningxia Tianlifeng Energy Co., Ltd., Wuzhong, Ningxia, 751000
  • Published:2025-03-03

摘要: 液化天然气(LNG)生产和存储过程中会产生大量蒸发气(BOG),该BOG除蕴含了相当可观的冷能外还属于富氦天然气,具有较大的开发利用价值。文中以鄂尔多斯盆地气田某年产20万tLNG工厂为例,在分析原料天然气、净化天然气、BOG组分及处理工艺的基础上,设计BOG提氦和冷能回收利用工艺流程,并计算投资费用和经济效益。结果显示,在LNG厂建设BOG提氦和冷能回收装置具有很好的经济效益,企业氦气销售可实现年均利润3368.34万元,年回收冷能118.28万kW·h,按电价估算可为企业节约成本49.68万元。

关键词: 天然气液化, BOG, 氦气提纯, 冷能回收, 经济分析

Abstract: During the production and storage of liquefied natural gas (LNG) in LNG plants, a large amount of Boil-off Gas (BOG) will be generated. BOG not only contains considerable cold energy, but also belongs to helium rich natural gas, which has great development and utilization value. Taking a LNG plant with an annual output of 200,000 tons in Ordos Basin as an example, this paper designs the process flow for BOG helium extraction and cold energy recovery and utilization based on the analysis of raw natural gas, purified natural gas, BOG components and treatment technology, and estimates the investment cost and economic benefits. The results show that the construction of BOG helium extraction and cold energy recovery unit in LNG plant has good profitability. The enterprise can achieve an annual average profit of 33,683,400 yuan from helium sales alone and an annual cold energy recovery of 1,182,800 kW·h, reducing the cost by 496,800 yuan based on electricity prices.

Key words: LNG, BOG, helium extraction, cold energy recovery, economic analysis