天津南部煤层富氧-海水地下气化模拟试验研究
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摘要
为了获取天津南部地区煤层地下气化最佳工艺参数,利用O2-CO2-海(清)水作为气化剂开展了煤炭地下气化模拟试验,研究了不同富氧浓度(40%～纯氧)气化参数的函数变化规律以及海水的催化作用,并根据质量守恒定律对最佳富氧浓度下煤炭地下气化模拟试验数据进行矫正,推算出现场生产出口煤气的参数。试验结果表明:天津南部地区煤层利用海水进行地下气化的最佳富氧浓度为80%,煤气组分H2体积分数为31.38%、CO为34.4%、CH4为5.03%、热值为9.6 MJ/Nm3;富氧浓度低于80%时,生产煤气中有效组分含量及热值与富氧浓度呈正相关;富氧浓度大于80%时,随着富氧浓度增加,有效组分含量及热值均呈缓慢下降趋势;海水气化有助于提高煤气热值和有效组分的含量,与清水气化相比分别提高18.62%和6.88%。
In order to get the optimum technical parameters of underground coal gasification( UCG) in southern Tianjin,it carry out the model test of UCG by using O2-CO2-sea( fresh) water which belong to the gasification agents,and research the linear function change rule of gasification parameters under the conditions of different contents of oxygen enrichment( 40% ～ 100%) and the catalysis of sea water.According to law of conservation of mass,it corrected the test data of UCG model to the optimum oxygen enrichment concentration,and calculated the parameters of export gas in the site.The results show that the optimum oxygen enrichment concentration of UCG using sea water is80% for the southern Tianjin coal bed and H2 is 31.38%,CO is 34.4%,CH4 is 5.03% and calorific value is 9.6 MJ/Nm3 in the coal gas produced in the site; active component content,calorific value and oxygen enrichment concentration appeared positive correlation while the oxygen enrichment concentration is less than 80%; the active component content and the calorific value appeared slow descending tendency along with increasing of oxygen enrichment while it is more than 80%; sea water as gasification agent is conductive to enhance the calorific value and active component content,which increase 18.62% and 6.88% respectively.
In order to get the optimum technical parameters of underground coal gasification( UCG) in southern Tianjin,it carry out the model test of UCG by using O2-CO2-sea( fresh) water which belong to the gasification agents,and research the linear function change rule of gasification parameters under the conditions of different contents of oxygen enrichment( 40% ～ 100%) and the catalysis of sea water.According to law of conservation of mass,it corrected the test data of UCG model to the optimum oxygen enrichment concentration,and calculated the parameters of export gas in the site.The results show that the optimum oxygen enrichment concentration of UCG using sea water is80% for the southern Tianjin coal bed and H2 is 31.38%,CO is 34.4%,CH4 is 5.03% and calorific value is 9.6 MJ/Nm3 in the coal gas produced in the site; active component content,calorific value and oxygen enrichment concentration appeared positive correlation while the oxygen enrichment concentration is less than 80%; the active component content and the calorific value appeared slow descending tendency along with increasing of oxygen enrichment while it is more than 80%; sea water as gasification agent is conductive to enhance the calorific value and active component content,which increase 18.62% and 6.88% respectively.
引文
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[16]王张卿,梁杰,梁鲲,等.鄂庄烟煤地下气化反应区分布与工艺参数的关联特性[J].煤炭学报,2015,40(7):1677-1683.WANG Zhangqing,LIANG Jie,LIANG Kun,et al. Correlation characteristics of reaction zone distribution and technical parameters during UCG of Ezhuang bituminous coal[J].Journal of China Coal Society,2015,40(7):1677-1683.
[17]刘淑琴,梁杰,余力.煤炭地下气化中CO2反应特性及影响因素[J].中国矿业大学学报,2000,29(6):606-609.LIU Shuqin,LIANG Jie,YU Li. Reaction character and influence factor of CO2in underground coal gasification[J]. Journal of China University of Mining&Technology,2000,29(6):606-609.
[18]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):125-129.LIU Shuqin,CHEN Feng,PANG Xulin,et al.Analysis on reaction process of underground coalgasification and stable control technique[J].Coal Science and Technology,2015,43(1):125-129.
[19]席建奋,梁杰,王张卿,等.煤炭地下气化温度场动态扩展对顶板热应力场及稳定性的影响[J].煤炭学报,2015,40(8):1949-1955.XI Jianfen,LIANG Jie,WANG Zhangqing,et al.Effect of temperature field dynamic expansion of underground coal gasification on thermal stress field and stability of roof[J].Journal of China Coal Society,2015,40(8):1949-1955.
[20]梁新星,梁杰.劣质瘦煤地下气化工艺试验研究[J].煤炭科学技术,2014,42(S1):274-280.LIANG Xinxing,LIANG Jie. Study on inferior lean coal underground gasification[J]. Coal Science and Technology,2014,42(S1):274-280.
[21]梁杰,席建奋,孙加亮,等.鄂庄薄煤层富氧地下气化模型试验[J].煤炭学报,2007,32(10):1032-1034.LIANG Jie,XI Jianfen,SUN Jialiang,et al. Experiment on underground coal gasification of the thin coal seam in Ezhuang[J].Journal of China Coal Society,2007,32(10):1032-1034.
[22]李悦.海水主要成分的平衡分布计算及其在渤海中的应用[J].海洋科学,1992(3):31-35.LI Yue.The calculation of the equilibrium distribution of dissolved species in sea water and its application to Bohai Sea[J]. Marine Sciences,1992(3):31-35.
[2] FRIEDMANN S J,UPADHYE R,KONG FM.Prospects for underground coal gasification in carbon-constrained world[J]. Energy Procedia,2009(1):4551-4557.
[3] BHUTTO A W,BAZMI A A,ZAHEDI G. Underground coal gasification:from fundamentals to applications[J]. Progress in Energy and Combustion Science,2013,39:189-214.
[4] PERKINS G,SAHAJWALLA V. A mathematical model for the chemical reaction of a semi-infinite block of coal in underground coal gasification[J].Energy&Fuels,2005,19(4):1679-1692.
[5]谢和平,高峰,鞠杨,等.深地煤炭资源流态化开采理论与技术构想[J].煤炭学报,2017,42(3):547-556.XIE Heping,GAO Feng,JU Yang,et al.Theoretical and tech nological conception of the fluidization mining for deep coal resources[J].Journal of China Coal Society,2017,42(3):547-556.
[6]梁杰.煤炭地下气化过程稳定性及控制技术[M].徐州:中国矿业大学出版社,2001.
[7]梁杰.煤炭地下气化技术进展[J].煤炭工程,2017,49(8):1-8.LIANG Jie.Development overview of underground coal gasification technology[J].Coal Engineering,2007,32(10):1032-1034.
[8]刘淑琴,张尚军,牛茂斐,等.煤炭地下气化技术及其应用前景[J].地学前缘,2016,23(3):97-102.LIU Shuqin,ZHANG Shangjun,NIU Maofei,et al. Technology process and application prospect of underground coal gasification[J].Earth Science Frontiers,2016,23(3):97-102.
[9]马保国,徐立,李相国,等.碱/碱土金属盐对高灰分煤粉燃烧的催化作用[J].煤炭科学技术,2007,35(9):69-72.MA Baoguo,XU Li,LI Xiangguo,et al. Catalysis of alkali/alkaliearth metal salt on combustion behavior of high ash coal[J]. Coal Science and Technology,2007,35(9):69-72.
[10]王志刚,曹健,江胜国,等.天津市煤炭地下气化可行性研究[R].天津:天津华北地质勘查局地质研究所,2017.
[11]王志刚,付小锦,江胜国.煤炭地下气化技术在天津地区的应用研究[J].煤炭与化工,2015,38(9):31-34.WANG Zhigang,FU Xiaojin,JIANG Shengguo.Application of underground coal gasification technology in Tianjin Area[J]. Coal and Chemical Industry,2015,38(9):31-34.
[12]王志刚,曹健,付小锦,等.天津西部地区山西组页岩气富集条件及勘探方向[J].煤炭科学技术,2017,45(11):31-36.WANG Zhigang,CAO Jian,FU Xiaojin,et al. Enrichment conditions and exploration direction of Shanxi formation shale gas in the west Area of Tianjin[J]. Coal Science and Technology,2017,45(11):31-36.
[13]陈峰,潘霞,刘洪涛,等.O2/CO2煤炭地下气化模型试验[J].煤炭学报,2015,38(S2):495-500.CHEN Feng,PAN Xia,LIU Hongtao,et al. O2/CO2underground coal gasification model test[J]. Journal of China Coal Society,2015,38(S2):495-500.
[14]赵娟,刘洪涛,潘霞,等.不同富氧条件下O2/CO2地下气化试验效果研究[J].煤炭科学技术,2017,45(6):214-220.ZHAO Juan,LIU Hongtao,PAN Xia,et al. Study on O2/CO2underground coal gasification effect with different oxy-enriched conditions[J].Coal Science and Technology,2017,45(6):214-220.
[15]刘淑琴,梁杰,常建,等.华亭煤纯氧-水蒸汽地下气化模型试验研究[J].东南大学学报:自然科学版,2003,33(3):355-358.LIU Shuqin,LIANG Jie,CHANG Jian,et al. UCG model test of Huating coal with oxygen-steam as gasification agent[J].Journal of Southesat University:Natural Science Edition,2003,33(3):355-358.
[16]王张卿,梁杰,梁鲲,等.鄂庄烟煤地下气化反应区分布与工艺参数的关联特性[J].煤炭学报,2015,40(7):1677-1683.WANG Zhangqing,LIANG Jie,LIANG Kun,et al. Correlation characteristics of reaction zone distribution and technical parameters during UCG of Ezhuang bituminous coal[J].Journal of China Coal Society,2015,40(7):1677-1683.
[17]刘淑琴,梁杰,余力.煤炭地下气化中CO2反应特性及影响因素[J].中国矿业大学学报,2000,29(6):606-609.LIU Shuqin,LIANG Jie,YU Li. Reaction character and influence factor of CO2in underground coal gasification[J]. Journal of China University of Mining&Technology,2000,29(6):606-609.
[18]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):125-129.LIU Shuqin,CHEN Feng,PANG Xulin,et al.Analysis on reaction process of underground coalgasification and stable control technique[J].Coal Science and Technology,2015,43(1):125-129.
[19]席建奋,梁杰,王张卿,等.煤炭地下气化温度场动态扩展对顶板热应力场及稳定性的影响[J].煤炭学报,2015,40(8):1949-1955.XI Jianfen,LIANG Jie,WANG Zhangqing,et al.Effect of temperature field dynamic expansion of underground coal gasification on thermal stress field and stability of roof[J].Journal of China Coal Society,2015,40(8):1949-1955.
[20]梁新星,梁杰.劣质瘦煤地下气化工艺试验研究[J].煤炭科学技术,2014,42(S1):274-280.LIANG Xinxing,LIANG Jie. Study on inferior lean coal underground gasification[J]. Coal Science and Technology,2014,42(S1):274-280.
[21]梁杰,席建奋,孙加亮,等.鄂庄薄煤层富氧地下气化模型试验[J].煤炭学报,2007,32(10):1032-1034.LIANG Jie,XI Jianfen,SUN Jialiang,et al. Experiment on underground coal gasification of the thin coal seam in Ezhuang[J].Journal of China Coal Society,2007,32(10):1032-1034.
[22]李悦.海水主要成分的平衡分布计算及其在渤海中的应用[J].海洋科学,1992(3):31-35.LI Yue.The calculation of the equilibrium distribution of dissolved species in sea water and its application to Bohai Sea[J]. Marine Sciences,1992(3):31-35.