天然气液化BOG提氦和冷能回收利用方案及经济性分析

doi:10.3969/j.issn.1005-8168.2025.01.001

Petrochemical Design ›› 2025, Vol. 42 ›› Issue (1): 1-5.doi: 10.3969/j.issn.1005-8168.2025.01.001

• DESIGN TECHNOLOGY •

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

Ren Jinping^1,2, Lu Yani^1,2, Yang Yanyan¹, Hai Minglian¹, Chen Bing³, Yu Chunliu^1,2, Zhang Qi^1,2

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

Abstract

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

Ren Jinping, Lu Yani, Yang Yanyan, Hai Minglian, Chen Bing, Yu Chunliu, Zhang Qi. Economic Analysis of LNG Boil-off Gas Helium Extraction and Cold Energy Recycling[J].Petrochemical Design, 2025, 42(1): 1-5.

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

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