低浓度煤层气深冷液化工艺研究
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- 英文论文题名：Study on cryogenic liquefaction technique of low concentration coalbed methane
- 论文作者：陈金华 ; 肖露 ; 令狐磊
- 英文论文作者：Chen Jinhua ; Xiao Lu ; Linghu Lei ; National Key Lab of Gas Disaster Monitoring and Emergency Technology ; Gas Research Branch ; Chongqing Research Institute Company Limited ; China Coal Technology and Engineering Group
- 年：2016
- 作者机构：瓦斯灾害监控与应急技术国家重点实验室;中国煤炭科工集团重庆研究院有限公司瓦斯研究分院;
- 论文关键词：低浓度煤层气 ; 深冷液化 ; 原料气浓度 ; CH_4回收率
- 英文论文关键词：low concentration coalbed methane ; cryogenic liquefaction ; raw gas concentration ; recovery rate of CH_4
- 会议召开时间：2016-11-29
- 会议录名称：第三届煤炭科技创新高峰论坛——煤炭绿色开发与清洁利用技术与装备论文集
- 语种：中文
- 分类号：TE646
- 学会代码：ZGMT
- 会议名称：第三届煤炭科技创新高峰论坛——煤炭绿色开发与清洁利用技术与装备
- 会议地点：中国北京
- 主办单位：中国煤炭工业协会、中国煤炭科工集团有限公司、中国煤炭学会、煤炭科学研究总院
- 学会名称：中国煤炭学会
- 页数：7
- 文件大小：625k
- 原文格式：O
- 会议级别：全国
摘要
为了验证低浓度煤层气浓缩制取液化天然气(LNG)技术的可行性,研发了低浓度煤层气深冷液化制取LNG中试装置,围绕该装置在运行过程中的安全和能耗问题,开展了液化工艺参数试验研究,为液化装置的放大设计及安全运行操作提供依据。装置运行及相关爆炸试验情况表明:低浓度煤层气深冷液化制取LNG在技术上是可行的;CH_4的回收率受气源条件的波动影响较敏感,而产品纯度受这种波动影响不大;精馏塔温度对CH_4的回收率和产品纯度影响较大,操作中应根据原料气CH_4含量的变化、原料气流量的变化及冷量是否充足等因素进行调整。该技术推广后,可有效解决CH_4体积分数大于25%的低浓度煤层气利用问题,在一定程度上可缓解我国天然气供应不足的现状。
In order to verify the liquefaction natural gas(LNG) technology feasibility with low concentration coalbed methane concentration,a LNG pilot device with a preparation of the low concentration coalbed methane cryogenic liquefaction was established.Around the safety and energy consumption problems of the device in the operation process,a experiment study on the liquefaction technique parameters was conducted to provide references to the enlarged design and safety operation of the liquefaction device.The device operation and the related explosion experiment condition showed that LNG made from the cryogenic liquefaction of the low concentration coalbed methane was feasible in technology.The recovery rate of the methane would be surged and sensitive by the gas source condition and the product purity would not be highly surged.The temperature of the distillation tower would have high influences to the methane recovery rate and the product purity and in the operation,according to the raw gas methane content variation,raw gas flow variation and cold quantity sufficient or not and other factors,adjustments should be conducted.After the technology promoted,the utilization problems of the low concentration coalbed methane when the methane volume fraction higher than 25%could be effectively solved.Thus,on certain degree,the insufficient natural gas supply status in China could be released.
In order to verify the liquefaction natural gas(LNG) technology feasibility with low concentration coalbed methane concentration,a LNG pilot device with a preparation of the low concentration coalbed methane cryogenic liquefaction was established.Around the safety and energy consumption problems of the device in the operation process,a experiment study on the liquefaction technique parameters was conducted to provide references to the enlarged design and safety operation of the liquefaction device.The device operation and the related explosion experiment condition showed that LNG made from the cryogenic liquefaction of the low concentration coalbed methane was feasible in technology.The recovery rate of the methane would be surged and sensitive by the gas source condition and the product purity would not be highly surged.The temperature of the distillation tower would have high influences to the methane recovery rate and the product purity and in the operation,according to the raw gas methane content variation,raw gas flow variation and cold quantity sufficient or not and other factors,adjustments should be conducted.After the technology promoted,the utilization problems of the low concentration coalbed methane when the methane volume fraction higher than 25%could be effectively solved.Thus,on certain degree,the insufficient natural gas supply status in China could be released.
引文
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[6]李磊.低浓度瓦斯发电技术研究现状及展望[J].矿业安全与环保,2014(2):86-89.Li Lei.Present situation and prospects of power generation technology with low-concentration gas[J].Mining Safety&Environmental Protection,2014(2):86-89.
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[12]王长元,张武,熊云威,等.低浓度煤层气含氧液化冷箱试验参数研究[J].矿业安全与环保,2014,41(8):26-28.Wang Changyuan,Zhang Wu.Xiong Yunwei.et al.Study on test parameters of oxygen liquefaction cold box for low-concentration coal-bed methane[J].Mining Safety&Environmental Protection,2014,41(8)-.26-28.
[2]申宝宏,刘见中,雷毅.我国煤矿区煤层气开发利用技术现状及展望[J].煤炭科学技术,2015,43(2):1-4.Shen Baohong,Liu Jianzhong,Lei Yi.Present status and prospects of coalbed methane development and utilization technology of coal mine area in China[J].Coal Science and Technology,2015,43(2):1-4.
[3]曲思建,董卫国,李雪飞,等.低浓度煤层气脱氧浓缩工艺技术开发与应用[J].煤炭学报,2014,39(8):1539-1544.Qu Sijian,Dong Weiguo,Li Xuefei,et al.Research and application of the low concentrated coalbed methane upgrading technique[J].Journal of China Coal Society,2014,39(8):1539-1544.
[4]Ren J,Xie C.Lin J Y,eZ al.Co-utilization of two coal mine residues:non-catalytic deoxygenation of coal mine methane over coal gangue[J].Process Safety&Environmental Protection,2013,92(6):896-902.
[5]康建东,兰波,邹维峰.煤矿五床式乏风瓦斯蓄热氧化装置设计与应用[J].煤炭科学技术,2015,43(2):136-139.Kang Jiandong,Lan Bo,Zou Weifeng.Design and application on five-bed type thermal accumulation oxidized device of mine ventilationair methane[J].Coal Science and Technology,2015,43(2):136-139.
[6]李磊.低浓度瓦斯发电技术研究现状及展望[J].矿业安全与环保,2014(2):86-89.Li Lei.Present situation and prospects of power generation technology with low-concentration gas[J].Mining Safety&Environmental Protection,2014(2):86-89.
[7]Ikealumba W C,Wu H.Some recent advances in liquefied natural gas(LNG)production,spill,dispersion,and safety[J].Energy Fuels,2014,28(6):3556-3586.
[8]Li Q Y.Wang L,Ju Y L.Analysis of flammability limits for the liquefaction process of oxygen-bearing coal-bed methane[J].Ciesc Journal,2011,62(5):1471-1477.
[9]Castillo L.Dorao C A.On the conceptual design of pre-cooling stage of LNG plants using propane or an ethane/propane mixture[J].Energy Conversion&Management,2013(65):140-146.
[10]Castillo L.Dahouk M M.Scipio S D,et al.Conceptual analysis of the precooling stage for LNG processes[J].Energy Conversion&Management,2013,?66(2):41-47.
[11]王长元,张武,陈久福,等.煤矿区低浓度煤层气含氧液化工艺技术研究[J].矿业安全与环保,2011,38(8):1-3.Wang Changyuan,Zhang Wu.Chen Jiufu,et al.Research on oxygen-containing liquefaction technology for low-concentration coal-bed gas in coal mining area[J].Mining Safety&Environmental Protection,2011,38(8):1-3.
[12]王长元,张武,熊云威,等.低浓度煤层气含氧液化冷箱试验参数研究[J].矿业安全与环保,2014,41(8):26-28.Wang Changyuan,Zhang Wu.Xiong Yunwei.et al.Study on test parameters of oxygen liquefaction cold box for low-concentration coal-bed methane[J].Mining Safety&Environmental Protection,2014,41(8)-.26-28.