International Journal of Oil, Gas and Coal Engineering

| Peer-Reviewed |

Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning

Received: 21 August 2018    Accepted: 04 September 2018    Published: 12 October 2018
Views:       Downloads:

Share This Article

Abstract

Before cooling, the LNG tank is filled with nitrogen. During the test run, the tank will be gradually cooled from normal temperature to - 162 C. A large amount of BOG with high nitrogen content will be discharged to the torch in a short time, resulting in a great waste of resources. This paper discusses the difficulty of BOG recovery in LNG tank cooling by studying the conventional methods of LNG tank commissioning. Full nitrogen replacement and "BOG+LNG" tank cooling process are adopted before commissioning. The utilization efficiency of cold energy in receiving station is improved, the flow rate of BOG in receiving station is reduced, and the B in cooling process of LNG tank is realized. BOG zero emissions. The results showed that: (1) nitrogen in LNG tank could be fully replaced by "top intake and bottom exhaust" replacement method; (2) BOG + LNG cooling process could cool the tank, and effectively reduce the BOG flow rate in the cooling process of LNG tank to meet the processing capacity of receiving station and realize zero BOG emission in the cooling process of LNG tank. The technology of LNG tank zero emission commissioning has great reference value for the tank cooling of new storage tanks or receiving stations with the capacity of gasification and outward transportation. At the same time, "top intake bottom exhaust" nitrogen replacement, "BOG + LNG" cooling process has certain enlightenment for optimizing LNG tank design.

DOI 10.11648/j.ogce.20180606.13
Published in International Journal of Oil, Gas and Coal Engineering (Volume 6, Issue 6, November 2018)
Page(s) 142-149
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

LNG Tank, Pre-cool Down, Nitrogen Purge, BOG Zero Emission, Dynamic Simulation

References
[1] Xing Yun. Constructing laws and standardization system in Chinese liquefied natural gas industry [J]. CIESC Journal, 2009, 60(2):1-8.
[2] Wang Liangjun, Liu Yang, Luo Zaiyuan, Liu Shan, Zhao Chunyu. Cooling techniques for ground large scale full capacity LNG storage tanks [J]. NATURAL GAS INDUSTRY, 2010, 30(1):93-95, 147.
[3] GB/T 20368-2006, Production, storage and handling of liquefied natural gas(LNG)[S]. STANDARDS PRESS OF CHINA, 2006.
[4] Tan Tian'en, Mai Benxi, Ding Huihua. Principles of Chemical Engineering[M]. Chemical industry press, 2002.
[5] Cheng Yongqiang, Tian shizhang, Wei nianying. Relevant Problems of Storage Tank Cooling down in Commissioning of LNG Terminal [J]. Oil and Gas Storage and Transportation, 2013, 32(5): 517-520.
[6] Wang Hongwen, Zhan Zhengkun. Physical Chemistry [M]. Higher Education Press, 2002.
[7] Gu Anzhong, Lu Xuesheng, Wang Rongshun. Technology of Liquefied Natural Gas[M]. CHINA machine press, 2004.
[8] Deng Wenyuan, Tian Lianjun, Tong Wenlong, Li Ning, Guo Kaihua, Li Wenfeng. Dynamic simulation of pre-cooling processes for large-scale LNG storage tanks[J]. CIESC Journal, 2015, 66(S2): 399-404.
[9] Zhang Shaozhi, Wang Jianfeng, Chen Guangming. Curve-fit of zeotropic mixed refrigerant two-phase-region thermodynamic properties[J]. Fluid Machinery, 2000, 28(10): 59-61.
[10] Wang Jiqiang, Ye Jianqiang. Calculation of large LNG tanks cooling-down process andusage amount of coolant[J]. Cryogenic Technology, 2015 (6): 36-39.
[11] Li Yang, Wei Wei, Wang Cai Li. Numerical Simulation and experiment on heat transfer of cushion of low temperature insulation cylinder [J]. Low temperature and superconductivity, 2008, 36(1): 9-12.
[12] Liu Nai Ling, Zhang Xu. Study on atomization characteristics of pressure fine mist nozzle[J]. Journal of Tongji University, 2005, 33(12): 1677-1679.
[13] Liu Nai Ling, Zhang Xu. Distribution of Droplet Distribution of Spiral Nozzle and Fitting of Empirical Formula of Droplet Diameter[J]. Experimental Fluid Mechanics, 2006, 20(3): 8-12.
[14] Hu Junquan, Xu Banglin. The emulating calculation of LNG cargo hold cooling-down system[J]. Marine Technology, 2004 (4): 24-25.
[15] Wang Zhongcheng, Li Pinyou, Jin Guoping. The CFD simulatin of LNG cargo cooling-down coolant[J]. Journal of Shanghai Maritime University, 2010, 31(4): 49-53.
[16] [16 ]Luo Tianlong, Chen Shuping, Yao Shuting, Yu Chunliu, Jin Shufeng. Calculation of LNG spherical tanks cooling-down[J]. Cryogenics and Superconductivity, 2014, 42(1): 21-24.
[17] Liu Wanshan, Lu Chao, Lv Jun. Study of LNG terminal tanks cooling-down simulation[J]. Gas and Heat, 2014, 34(6): 1-4.
[18] Chen Shuai, Gong Ming, Wei Nianying, et al. Calculation of Minimum Outward Transport Volume at LNG Receiving Station under Different Operating Parameters [J]. Oil and Gas Storage and Transportation, 2015, 34(3):303-309
[19] Chen Liqiong, Han Xiaoyu, Huang Kun, et al. Study on recovery process of evaporation gas from LNG storage [J]. Petroleum and Natural Gas Chemical Industry, 20i5, 44 (1):39-44.
[20] Yang Zhi Guo, Li Ya Jun. Optimization of Re - Condensation Process in LNG Terminal[J]. Modern Chemical Industry, 2009, 29(11): 74-79.
[21] Deng Liqiang, Li Ning, Guo Kaihua Dynamic simulation analysis of LNG receiver's re condenser under off design conditions[J]. Petroleum and natural gas chemical industry 2016.04 (7): 31- 37.
Author Information
  • Golden Bay Lng Ltd, Zhuhai, China

  • Golden Bay Lng Ltd, Zhuhai, China

  • Guangdong Power Grid Ltd, Guangzhou, China

  • Golden Bay Lng Ltd, Zhuhai, China

Cite This Article
  • APA Style

    Kong Linghai, Li Wenfeng, Deng Wenyuan, Tong Wenlong. (2018). Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning. International Journal of Oil, Gas and Coal Engineering, 6(6), 142-149. https://doi.org/10.11648/j.ogce.20180606.13

    Copy | Download

    ACS Style

    Kong Linghai; Li Wenfeng; Deng Wenyuan; Tong Wenlong. Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning. Int. J. Oil Gas Coal Eng. 2018, 6(6), 142-149. doi: 10.11648/j.ogce.20180606.13

    Copy | Download

    AMA Style

    Kong Linghai, Li Wenfeng, Deng Wenyuan, Tong Wenlong. Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning. Int J Oil Gas Coal Eng. 2018;6(6):142-149. doi: 10.11648/j.ogce.20180606.13

    Copy | Download

  • @article{10.11648/j.ogce.20180606.13,
      author = {Kong Linghai and Li Wenfeng and Deng Wenyuan and Tong Wenlong},
      title = {Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {6},
      number = {6},
      pages = {142-149},
      doi = {10.11648/j.ogce.20180606.13},
      url = {https://doi.org/10.11648/j.ogce.20180606.13},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ogce.20180606.13},
      abstract = {Before cooling, the LNG tank is filled with nitrogen. During the test run, the tank will be gradually cooled from normal temperature to - 162 C. A large amount of BOG with high nitrogen content will be discharged to the torch in a short time, resulting in a great waste of resources. This paper discusses the difficulty of BOG recovery in LNG tank cooling by studying the conventional methods of LNG tank commissioning. Full nitrogen replacement and "BOG+LNG" tank cooling process are adopted before commissioning. The utilization efficiency of cold energy in receiving station is improved, the flow rate of BOG in receiving station is reduced, and the B in cooling process of LNG tank is realized. BOG zero emissions. The results showed that: (1) nitrogen in LNG tank could be fully replaced by "top intake and bottom exhaust" replacement method; (2) BOG + LNG cooling process could cool the tank, and effectively reduce the BOG flow rate in the cooling process of LNG tank to meet the processing capacity of receiving station and realize zero BOG emission in the cooling process of LNG tank. The technology of LNG tank zero emission commissioning has great reference value for the tank cooling of new storage tanks or receiving stations with the capacity of gasification and outward transportation. At the same time, "top intake bottom exhaust" nitrogen replacement, "BOG + LNG" cooling process has certain enlightenment for optimizing LNG tank design.},
     year = {2018}
    }
    

    Copy | Download

  • TY  - JOUR
    T1  - Research and Application of Commissioning Technology for LNG Tank Zero Discharge Commissioning
    AU  - Kong Linghai
    AU  - Li Wenfeng
    AU  - Deng Wenyuan
    AU  - Tong Wenlong
    Y1  - 2018/10/12
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ogce.20180606.13
    DO  - 10.11648/j.ogce.20180606.13
    T2  - International Journal of Oil, Gas and Coal Engineering
    JF  - International Journal of Oil, Gas and Coal Engineering
    JO  - International Journal of Oil, Gas and Coal Engineering
    SP  - 142
    EP  - 149
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20180606.13
    AB  - Before cooling, the LNG tank is filled with nitrogen. During the test run, the tank will be gradually cooled from normal temperature to - 162 C. A large amount of BOG with high nitrogen content will be discharged to the torch in a short time, resulting in a great waste of resources. This paper discusses the difficulty of BOG recovery in LNG tank cooling by studying the conventional methods of LNG tank commissioning. Full nitrogen replacement and "BOG+LNG" tank cooling process are adopted before commissioning. The utilization efficiency of cold energy in receiving station is improved, the flow rate of BOG in receiving station is reduced, and the B in cooling process of LNG tank is realized. BOG zero emissions. The results showed that: (1) nitrogen in LNG tank could be fully replaced by "top intake and bottom exhaust" replacement method; (2) BOG + LNG cooling process could cool the tank, and effectively reduce the BOG flow rate in the cooling process of LNG tank to meet the processing capacity of receiving station and realize zero BOG emission in the cooling process of LNG tank. The technology of LNG tank zero emission commissioning has great reference value for the tank cooling of new storage tanks or receiving stations with the capacity of gasification and outward transportation. At the same time, "top intake bottom exhaust" nitrogen replacement, "BOG + LNG" cooling process has certain enlightenment for optimizing LNG tank design.
    VL  - 6
    IS  - 6
    ER  - 

    Copy | Download

  • Sections