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[1]陈仕林,孙兆虎,宫敬.煤层气小型撬装液化装置的优化[J].油气储运,2016,35(5):542-546.[doi:10.6047/j.issn.1000-8241.2016.05.018]
　CHEN Shilin,SUN Zhaohu,GONG Jing.Optimization of small-scale skid-mounted liquefaction device for coalbed methane[J].Oil & Gas Storage and Transportation,2016,35(5):542-546.[doi:10.6047/j.issn.1000-8241.2016.05.018]

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煤层气小型撬装液化装置的优化

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 35 期数: 2016年第5期页码: 542-546 栏目: 出版日期: 2016-05-25

Title:: Optimization of small-scale skid-mounted liquefaction device for coalbed methane

作者:: 陈仕林¹; 2; 孙兆虎³; 宫敬¹; 1. 中国石油大学(北京)机械与储运工程学院;
2. 中联煤层气有限责任公司;
3. 中国科学院理化技术研究所

Author(s):: CHEN Shilin¹; 2; SUN Zhaohu³; GONG Jing¹; 1. College of Mechanical and Transportation Engineering, China University of Petroleum (Beijing);
2. China United Coalbed Methane Co. Ltd.;
3. Technical Institute of Physics and Chemistry, China Academy of Sciences

关键词:: 煤层气; 撬装液化装置; 液化循环流程; 制冷剂; 深度分离; 冷箱; 换热器

Keywords:: CBM; skid-mounted liquefaction device; liquefaction cycle; refrigerant; deep separation; cold box; heat exchanger

分类号:: TE832

DOI:: 10.6047/j.issn.1000-8241.2016.05.018

摘要:: 煤层气田具有多井、低压、低产等特点,小规模先导试验井组和偏远气井单独建设管道输送系统经济性较差,导致产出气不能通过集输管道进行有效外输。提出了适合煤层气撬装液化装置的新型混合工质制冷剂液化流程:对原料气进行预冷,利用低温将原料气中杂质析出,然后吸附进入第一显热换热器/第二显热换热器中,并进行脱除;利用原燃料气进行复温吹洗,脱除的杂质随燃料气进入发电机燃烧,第一显热换热器与第二显热换热器交替运行,使其前处理流程更加简单。针对煤层气撬装液化装置使用油润滑螺杆压缩机驱动的方式,提出了混合工质制冷剂节流制冷机结构,实现润滑油与制冷剂的深度分离。对于冷箱结构,采用板翅式换热器与微细管结构绕管式换热器相结合的优化方式。研制了煤层气撬装液化试验样机,试验运行测试结果表明:该装置最小比功耗为0.612(kW·h)/m³,其液化性能指标与日处理量10×10⁴ m³ 的集中式液化装置的性能相当。

Abstract:: Coalbed methane (CBM) fields are characterized by multiple wells, low pressure and low production. It is not economical to build an independent pipeline system for small pilot wells or remote wells, so the produced gas can not be transported efficiently via gas pipelines. In this paper, a new type of mixed refrigerant liquefaction process suitable for CBM skid-mounted liquefaction device was put forward. First, the feed gas is pre-cooled so that the impurities in the feed gas can be precipitated under the effect of low temperature. Second, the impurities are adsorbed into the first/second sensible heat exchanger for removal. And third, the original fuel gas is used for polythermal flush and the removed impurities flow into electric generators together with the fuel gas for combustion. The first and the second sensible heat exchangers run alternatively. Therefore, this pretreatment process becomes simpler. For CBM skid-mounted liquefaction devices which are driven by oil lubricated screw compressors, a J-T refrigerator structure with mixed refrigerant was proposed to separate lubricant from refrigerant deeply. The cold box structure was optimized by combining a plate-fin heat exchanger with a spiral tube heat exchanger with micro tube structure. Finally, a CBM skid-mounted liquefaction prototype was developed and then trial run tests were carried out. It is shown that its minimum unit power consumption is 0.612 (kW·h)/m³ and its liquefaction performance index is equivalent to that of centralized device with treatment rate of 10×10⁴ m³.

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备注/Memo

收稿日期:2015-12-24;改回日期:2016-3-4。
基金项目:国家科技重大专项课题“煤层气田低压集输工艺技术及关键设备研究”,2011ZX05039-001。
作者简介:陈仕林,男,工程师,在读博士生,1983年生,2007年硕士毕业于中国石油大学(华东)油气储运工程专业,现主要从事煤层气田地面集输相关技术的研究工作。地址:北京市东城区安外大街甲88号1001室,100011。电话:010-64299994,Email:chenshilin0720@163.com

更新日期/Last Update: 1900-01-01