Main Problems and Countermeasures of Underground Coal Gasification Industrial and Technological Development

doi:10.3969/j.issn.1002-302x.2020.03.07

Abstract

Abstract: Underground coal gasification can bring about clean production and utilization of coal resources, offering new substitute strategic energy. Underground coal gasification technology came under study and field experiment in foreign countries as early as the 1930s. Roadway and shallow-layer drilling were adopted as the main underground coal gasification process. The underground coal gasification FEOL of shallow-layer drilling is basically mature at the present time, but no breakthrough has been made in the technology for large-scale development. Industrialization process is sluggish owing to some restrictions, such as environmental policies, the conditions of resources and technological limitations. It is necessary to make breakthroughs in a series of areas, such as geological assessment and selection of sites, basic experiment, construction of gasifier, gasification operational control process, comprehensive application of crude gas, downhole engineering technology, and large-scale development technology. In addition, some problems need to be solved, such as greenhouse gas emission and economic feasibility of projects. Underground coal gasification will be developed from the shallow layers to the middle and deep layers, while treatment technology of crude gas is developed towards deep processing and comprehensive application from single power generation. With the strategic demand, resources foundation and technological conditions for underground coal gasification, the large-scale petroleum enterprises should take advantage of their upstream and downstream integration to establish the integrated operational model of scientific research, experiment, production as well as engineering and technological services, thus accelerating commercialized development process of underground coal gasification and leading industrial development.

摘要： 煤炭地下气化可实现煤炭资源清洁开采和利用，催生新的战略替代能源。国外自20世纪30年代开始了煤炭地下气化技术研究和现场试验，主要采用巷道式及浅层钻井式煤炭地下气化工艺。目前，浅层钻井式煤炭地下气化前端工艺基本成熟，但规模化开发技术尚未突破，受环保政策、资源条件、技术局限等因素限制，工业化进展缓慢，还需要在地质评价和选址、基础实验、气化炉建造、气化运行控制工艺、粗煤气综合利用、井下工程技术、规模化开发技术等方面取得进一步突破，并解决温室气体排放及项目经济性等问题。煤炭地下气化未来将由浅层向中深层发展，粗煤气处理技术将由单一发电向深加工、综合利用方向发展。大型石油企业具有发展煤炭地下气化的战略需求、资源基础和技术条件，应发挥上下游一体化综合优势，建立科研、试验、生产及工程技术服务一体化运营模式，加快推进煤炭地下气化商业化开发进程，引领产业发展。

关键词: 煤炭地下气化, 钻井式工艺, 中深层, 二氧化碳资源化利用, 能源替代

CLC Number:

Han Jun, Fang Huijun, Yu Yueyu, Xu Xiaohu, Wang Chuangye, Liu Meng, Liu Danlu. Main Problems and Countermeasures of Underground Coal Gasification Industrial and Technological Development[J]. Petroleum Science and Technology Forum, 2020, 39(3): 50-59.

韩　军　方惠军　喻岳钰　徐小虎　王创业　刘　猛　刘丹璐. 煤炭地下气化产业与技术发展的主要问题及对策[J]. 石油科技论坛, 2020, 39(3): 50-59.

References

[1]陈石义, 李乐忠, 崔景云, 等. 煤炭地下气化(UCG)技术现状及产业发展分析[J]. 资源与产业, 2014, 16(5): 129-135. Chen Shiyi, Li Lezhong, Cui Jingyun, et al. Advances of underground coal gasification(UCG) and industrial development[J]. Resources & Industries,2014,16(5): 129-135.
[2]胡鑫蒙, 赵迪斐, 郭英海, 等. 我国煤炭地下气化技术(UCG)的发展现状与展望: 来自首届国际煤炭地下气化技术与产业论坛的信息[J]. 非常规油气, 2017, 4(1): 108-115. Hu Xinmeng, Zhao Difei, Guo Yinghai, et al. Present development situation and prospect of underground coal gasification (UCG) technology in China: Information from the 1st International Academic Forum for Underground Coal Gasification Technology and Industry[J]. Unconventional Oil & Gas, 2017, 4(1): 108-115.
[3]国家发展改革委，国家能源局. 关于印发《能源技术革命创新行动计划（2016-2030年）》的通知[EB/OL]. (2016-04-07). http://www.nea.gov.cn/2016-06/01/c_135404377.htm. National Development and Reform Commission, National Energy Administration. Circular on printing and issuance of “Action Plan (2016-2030) for Energy Technological Revolution and Innovation[EB/OL]. (2016-04-07). http://www.nea.gov.cn/2016-06/01/c_135404377.htm.
[4]邹才能,陈艳鹏,孔令峰,等.煤炭地下气化及对中国天然气发展的战略意义[J].石油勘探与开发,2019,46(2): 195-204. Zou Caineng, Chen Yanpeng, Kong Lingfeng, et al. Underground coal gasification and its strategic significance to the development of natural gas industry in China[J]. Petroleum Exploration and Development, 2019, 46(2): 195-204.
[5]Siemens C W. On the regenerative gas furnace as applied to the manufacture of cast steel[J]. Journal of the Chemical Society, 1868, 21:279-310.
[6]杨兰和, 梁杰, 余力, 等. 徐州马庄煤矿煤炭地下气化试验研究[J]. 煤炭学报, 2000, 25(1): 86-90. Yang Lanhe, Liang Jie, Yu Li, et al. The test study on underground coal gasification at Mazhuang Coal Mine in Xuzhou[J]. Journal of China Coal Society, 2000, 25(1): 86-90.
[7]杨兰和, 梁杰, 尹雪峰. 煤炭地下气化制氢技术理论与实践[J]. 煤炭科学技术, 2000, 28(6): 37-39,56. Yang Lanhe, Liang Jie, Yin Xuefeng. Theory and practices of nitrogen making with underground coal gasified gas[J]. Coal Science and Technology, 2000, 28(6): 37-39, 56.
[8]张明, 王世鹏. 国内外煤炭地下气化技术现状及新奥攻关进展[J]. 探矿工程(岩土钻掘工程), 2010, 37(10): 14-16. Zhang Ming, Wang Shipeng. Technical situation of underground coal gasification in China and abroad and the study progress of ENN[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling), 2010, 37(10): 14-16.
[9]陈峰, 潘霞, 庞旭林. 新奥无井式煤炭地下气化试验进展及产业化规划[J]. 煤炭科学技术, 2013, 41(5): 19-22. Chen Feng, Pan Xia, Pang Xulin. Progress and industrialization plan of ENN’s no mine shaft type underground coal gasification[J]. Coal Science and Technology, 2013, 41(5): 19-22.
[10] Blinderman M S, Klimenko A Y. Underground coal gasification and combustion[M]. London: Woodhead Publishing, 2017: 11-13, 137.
[11]刘淑琴, 周蓉, 潘佳, 等. 煤炭地下气化选址决策及地下水污染防控[J]. 煤炭科学技术, 2013, 41(5): 23-27, 62. Liu Shuqin, Zhou Rong, Pan Jia, et al. Location selection and groundwater pollution prevention & control regarding underground coal gasification[J]. Coal Science and Technology, 2013, 41(5): 23-27, 62.
[12]Magnani C F, Ali S M. Mathematical modeling of the stream method of underground coal gasification[J]. Society of Petroleum Engineers Journal, 1975,15(5):425-436.
[13]Magnani C F. Mathematical foundations of the process of underground gasification of coal[D]. Pennsylvania State University, 1973.
[14]Loison R. Heat transfer into the earth surrounding an underground gasification system[J]. Journal of the Institute of Fuel, 1953,26:5-10.
[15]Gunn R D, Whitman D L. An in situ coal gasification model (forward mode) for feasibility studies and design[R]. Laramie Energy Research Center, Rep. LERC/RJ-76/2,1976,7:10-15.
[16]Thorsness C B, Grens E A, Sherwood A. One-dimensional model for in situ coal gasification[J]. Work,1978(1):3.
[17]Jennlngs J W. Texas A&M project status: Underground lignite gasification[C]. 3rd Annual Underground Coal Conversion Symposium, Fallen Leaf Lake,1977.
[18]Perkins G, Sahajwalla V. Steady-state model for estimating gas production from underground coal gasification[J]. Energy and Fuel, 2008,22(6):3902-3914.
[19]杨兰和,刘淑琴,梁杰.煤炭地下气化动态温度场及浓度场数值分析[J].中国矿业大学学报,2003,32(4):349-353. Yang Lanhe, Liu Shuqin, Liang Jie. Numerical analysis of dynamic temperature field and concentration field in the process of underground coal gasification[J]. Journal of China University of Mining & Technology, 2003,32(4):349-353.
[20]梁杰，王张卿.煤炭地下气化基础：基于三区分布的煤炭地下气化物料与能量平衡模型[M].北京：科学出版社,2017. Liang Jie,Wang Zhangqing. Foundation for underground coal gasification: underground coal gasification, materials and energy equilibrium model based on three-zone distribution[M]. Beijing: Science Press,2017.
[21]毛飞.煤炭地下气化是我国化石原料供给侧创新方向[J].天然气工业,2016,36(4):103-111. Mao Fei. Underground coal gasification (UCG): A new trend for the supply-side economics of fossil fuels[J]. Natural Gas Industry, 2016, 36(4): 103-111.
[22]邹才能, 赵群, 陈建军, 等. 中国天然气发展态势及战略预判[J]. 天然气工业, 2018, 38(4): 1-11. Zou Caineng, Zhao Qun, Chen Jianjun, et al. Natural gas in China: Development trend and strategic forecast[J]. Natural Gas Industry, 2018, 38(4): 1-11.
[23]孔令峰, 朱兴珊, 展恩强, 等. 深层煤炭地下气化技术与中国天然气自给能力分析[J]. 国际石油经济, 2018, 26(6): 85-94. Kong Lingfeng, Zhu Xingshan, Zhan Enqiang, et al. Suggestions on China’s natural gas self-sufficiency by deep coal underground gasification technology[J]. International Petroleum Economics, 2018, 26(6): 85-94.
[24]中国煤炭地质总局. 中国煤炭资源赋存规律与资源评价[M]. 北京：科学出版社, 2016. China National Administration of Coal Geology. China occurrence regularity of coal resources and resource evaluation[M]. Beijing: Science Press, 2016.
[25]Perkins G, Sahajw A V. Modelling of heat and mass transport phenomena and chemical reaction in underground coal gasification[J]. Chemical Engineering Research and Design, 2007, 85(3): 329-343.
[26]段天宏. 煤炭地下气化的热解模型实验及气化指标研究[D]. 徐州: 中国矿业大学, 2014. Duan Tianhong. Study on pyrolysis model experiments and gasification indexes of underground coal gasification[D]. Xuzhou: China University of Mining and Technology, 2014.
[27]Perkins G. Underground coal gasification-Part I: Field demonstrations and process performance[J]. Progress in Energy and Combustion Science, 2018, 67: 158-187.
[28]刘淑琴, 陈峰, 庞旭林, 等. 煤炭地下气化反应过程分析及稳定控制工艺[J]. 煤炭科学技术, 2015, 43(1): 125-128. Liu Shuqin, Chen Feng, Pang Xulin, et al. Analysis on reaction process of underground coal gasification and stable control technique[J]. Coal Science and Technology, 2015, 43(1): 125-128.
[29]Klebingat L E, Bingat S, Kempka T, et al. Optimization of synthesis gas heating values and tar by-product yield in underground coal gasification[J]. Fuel, 2018, 229: 248-261.