CN104132504B - 一种从井场天然气回收混烃的系统及方法 - Google Patents

一种从井场天然气回收混烃的系统及方法 Download PDF

Info

Publication number
CN104132504B
CN104132504B CN201410339760.5A CN201410339760A CN104132504B CN 104132504 B CN104132504 B CN 104132504B CN 201410339760 A CN201410339760 A CN 201410339760A CN 104132504 B CN104132504 B CN 104132504B
Authority
CN
China
Prior art keywords
gas
pressure
temperature
heat exchanger
dethanizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201410339760.5A
Other languages
English (en)
Other versions
CN104132504A (zh
Inventor
王勇
林罡
郭亚红
何茂林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Changqing Technology Engineering Co Ltd
Original Assignee
Xian Changqing Technology Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Changqing Technology Engineering Co Ltd filed Critical Xian Changqing Technology Engineering Co Ltd
Priority to CN201410339760.5A priority Critical patent/CN104132504B/zh
Publication of CN104132504A publication Critical patent/CN104132504A/zh
Application granted granted Critical
Publication of CN104132504B publication Critical patent/CN104132504B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209Natural gas or substitute natural gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0242Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00Processes or apparatus using separation by rectification
    • F25J2200/02Processes or apparatus using separation by rectification in a single pressure main column system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00Processes or apparatus using separation by rectification
    • F25J2200/70Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00Processes or apparatus using other separation and/or other processing means
    • F25J2205/02Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00Processes characterised by the type or other details of the feed stream
    • F25J2210/04Mixing or blending of fluids with the feed stream
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/68Separating water or hydrates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30Compression of the feed stream
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00Processes or apparatus involving steps for expanding of process streams
    • F25J2240/40Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02Recycle of a stream in general, e.g. a by-pass stream

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

本发明属于天然气领域,具体涉及一种从井场天然气回收混烃的系统及方法,包括分离增压单元、蒸馏回收单元,可以广泛应用在国内偏远井场气、放空气、站点伴生气的回收具有良好的经济效益和社会效益;HYSYS软件进行模拟分析对已建或将建深冷装置具有实时调整参数、优化参数、提高产率、降低能耗等设计参考价值。

Description

一种从井场天然气回收混烃的系统及方法
技术领域
本发明属于天然气领域,具体涉及一种从井场天然气回收混烃的系统及方法。
背景技术
井场伴生气中除含有甲烷外,含有一定量的乙烷、丙烷、丁烷、戊烷以及更重烃类。为符合商品天然气质量指标或管输气对烃露点的质量要求,或为获得宝贵的液体燃料和化工原料,需将天然气中的烃类按照一定要求分离与回收。
国内一些天然气井场,存在供电、供水设施跟不上,故不适合建造大型天然气处理装置,更适合建造一些小型化和橇装化的混烃回收装置。由于目前国内没有对该工艺进行研究,混烃回收系统也缺乏理论知识作为依托。
混烃回收工艺是将C3以上的天然气组分进行充分回收,回收到的天然气凝液或直接作为商品,或根据有关产品质量指标进一步分离为乙烷、液化石油气(LPG),也可以是丙烷、丁烷的混合物)及天然汽油(C5以上)等产品。
发明内容
本发明的目的是提供一种从井场天然气回收混烃的系统及方法,该混烃回收工艺方法是将天然气中的丙烷、丁烷等以上重烃回收。
为此本发明提供了一种从井场天然气回收混烃的系统,包括分离增压单元、蒸馏回收单元,
1)分离增压单元:包括依次通过管道联接的气液分离器、换热器一、压缩机一、冷却器一、压缩机二、冷却器二、分子筛干燥器,所述分子筛干燥器气体出口联接在换热器一加热管进口,换热器一加热管出口依次联接换热器二节流阀、低温分离器,所述换热器二进口联接低温分离器顶部,所述换热器二出口联接出气管道;
2)蒸馏回收单元:包括脱乙烷塔,所述脱乙烷塔底部联接平衡器,所述平衡器联接出气管道。
所述脱乙烷塔顶部联接在气液分离器下部,所述脱乙烷塔与气液分离器之间还设置有循环器。
所述的换热器一、换热器二为板翅式换热器。
一种从井场天然气回收混烃的方法,包括以下步骤:
1)常温常压下原料气首先进入气液分离器上部,除去其中的水分和杂质;原料气在气液分离器内达到气液相平衡后,分离出的部分气相,温度达到17~18℃,压力达到1.4~1.6MPa,从气液分离器顶部依次进入换热器一,温度达到36~38℃,压力达到1.4~1.6MPa,进入压缩机一,温度达到85~86℃,压力达到2.4~2.5MPa,进入冷却器一,温度达到40~45℃,压力达到2.4~2.5MPa,进入压缩机二,温度达到105~110℃,压力达到4.7~4.9MPa,进入冷却器二,最终温度达到40~45℃,压力4.7~4.9MPa;进入分子筛干燥器脱掉原料气里面的游离水;
2)经过增压和脱水后的原料气,再返回换热器一给原料气提供热量,温度达到20~25℃,压力达到4.5~4.8MPa,再进入换热器二降温至-60~-65℃进入节流阀,节流阀在气体节流处形成局部收缩,使得流速增加、温度和压力降低,降温至-70~-74℃进入低温分离器进行低温闪蒸;
气液分离器操作温度17~18℃,压力1.4~1.6MPa;
3)闪蒸后的原料气温度-70~-75℃,压力3.5~3.8MPa从低温分离器下部进入脱乙烷塔;脱乙烷塔下部产品外输至下游;
脱乙烷塔塔内重沸器中乙烷的摩尔分数控制在5%~15%,脱乙烷塔塔内精馏操作压力1.5~1.7MPa,温度65~70℃。
所述低温分离器顶部出来的气体温度-70~-75℃,压力3.5~4.0MPa,进入换热器二换热后,温度降为15~20℃,压力3.5~4.0MPa外输至下游。
本发明的有益效果是:本发明提供的这一种从井场天然气回收混烃的系统及方法,包括分离增压单元、蒸馏回收单元,可以广泛应用在国内偏远井场气、放空气、站点伴生气的回收具有良好的经济效益和社会效益;HYSYS软件进行模拟分析对已建或将建深冷装置具有实时调整参数、优化参数、提高产率、降低能耗等设计参考价值。
下面结合实施例附图对本发明做进一步说明。
附图说明
图1是一种从井场天然气回收混烃的系统及方法的实施例示意图;
图中:1、原料气;2、气液分离器;3、换热器一;4、压缩机一;5、冷却器一;6、压缩机二;7、冷却器二;8、分子筛干燥器;9、平衡器;10、脱乙烷塔;11、低温分离器;12、节流阀;13、换热器二;14、循环器。
具体实施方式
实施例1:
如图1所示的一种从井场天然气回收混烃的系统,包括分离增压单元、蒸馏回收单元,其特征在于:
1)分离增压单元:包括依次通过管道联接的气液分离器2、换热器一3、压缩机一4、冷却器一5、压缩机二6、冷却器二7、分子筛干燥器8,所述分子筛干燥器8气体出口联接在换热器一3加热管进口,换热器一3加热管出口依次联接换热器二13、节流阀12、低温分离器11,所述换热器二13进口联接低温分离器11顶部,所述换热器二13出口联接出气管道;
2)蒸馏回收单元:包括脱乙烷塔10,所述脱乙烷塔10上部与低温分离器11底部联接,所述脱乙烷塔10底部联接平衡器9,所述平衡器9联接出气管道。
所述脱乙烷塔10顶部联接在气液分离器2下部,所述脱乙烷塔10与气液分离器2之间还设置有循环器14。
所述的换热器一3、换热器二13为板翅式换热器。
一种从井场天然气回收混烃的方法,包括以下步骤:
1)常温常压下原料气1首先进入气液分离器2上部,除去其中的水分和杂质;原料气1在气液分离器2内达到气液相平衡后,分离出的部分气相从气液分离器2顶部依次进入换热器一3、压缩机一4、冷却器一5、压缩机二6,冷却器二7,最终温度达到40~45℃,压力4.7~4.9MPa;进入分子筛干燥器8脱掉原料气(1)里面的游离水;
2)经过增压和脱水后的原料气1,再返回换热器一3给原料气1提供热量,温度达到20~25℃,压力达到4.5~4.8MPa,再进入换热器二13降温至-60~-65℃进入节流阀12,节流阀12在气体节流处形成局部收缩,使得流速增加、温度和压力降低,降温至-70~-74℃进入低温分离器11进行低温闪蒸;
气液分离器(2)操作温度17~18℃,压力1.4~1.6MPa;
3)闪蒸后的原料气1温度-70~-75℃,压力3.5~3.8MPa从低温分离器11下部进入脱乙烷塔10;脱乙烷塔10下部作为产品外输至下游;
脱乙烷塔10塔内重沸器中乙烷的摩尔分数控制在5%~15%,脱乙烷塔10塔内精馏操作压力1.5~1.7MPa,温度65~70℃。
所述低温分离器11顶部出来的气体温度-70~-75℃,压力3.5~4.0MPa,进入换热器二13换热后,温度降为15~20℃,压力3.5~4.0MPa外输至下游。
本发明提供的这一种从井场天然气回收混烃的系统及方法,可以广泛应用在国内偏远井场气、放空气、站点伴生气的回收具有良好的经济效益和社会效益。
常温常压下从边远井口出来的原料气1首先进入气液分离器2,在气液分离器2内达到气液相平衡后,分离出部分气相(温度17.8℃,压力1.5MPa),进入板翅式换热器一3,换热后物流温度38℃,压力1.49MPa,进入压缩机一4进行压缩,压缩完物流温度85.3℃,压力2.42MPa,再进入冷却器一5进行冷却,冷却后物流温度40℃,压力2.4MPa,再进入压缩机二6进行压缩,二次压缩后物流温度109℃,压力4.8MPa,再进入冷却器二7进行冷却,二次冷却后物流温度40℃,压力4.8MPa,然后进入分子筛干燥器8脱掉天然气里面的游离水,返回板翅式换热器一3给原料气1温度提供热量,出来物流温度21.6℃,压力4.78MPa,再进入板翅式换热器二13降温至-65℃再进入节流阀12,节流阀12在气体节流处形成局部收缩,使得流速增加温度和压力降低,降温至-73.8℃。节流后的天然气进入低温分离器11进行低温闪蒸。
闪蒸是气相和液相进入容器空间,在一定的压力和温度下,气液两相迅速分离。闪蒸后的物流温度-73.8℃,压力3.8MPa,
进入脱乙烷塔10,脱乙烷塔内重沸器中乙烷的摩尔分数控制在5%~15%,脱乙烷塔内精馏压力控制在1.5MPa~1.52MPa,塔内温度控制在67.4℃,混烃得到大部分回收,经测定混烃的饱和蒸汽压在37.8℃下为0.78MPa,满足液化天然气规范的要求,经平衡器9外输至下游。(规范要求产品混烃饱和蒸汽压≦1.6MPa,常压水露点≦-60℃)。
脱乙烷塔10顶部出来的气相物流温度-58.1℃,压力1.5MPa经过循环器14返回到分离器2;气液分离器2分离出的水由下部排出。
低温分离器11顶部出来的气相物流温度(-70~-75℃,压力3.5~4.0MPa)进入换热器13复热后,物流温度(15~20℃,压力3.5~4.0MPa)外输至下游。
分子筛干燥器8脱出的水由下部排出。
表1是混烃回收产品组分表;表2是外输干气组分表。
表1 混烃回收产品组分表
组分 CH4 C2H6 C3H8 iC4 nC4 iC5 nC5 CO2 N2
分数 0 0.1 0.2084 0.3356 0.0053 0.0072 0.2312 0 0
表2外输干气组分表
组分 CH4 C2H6 C3H8 iC4 nC4 iC5 nC5 CO2 N2
分数 0.9157 0.022 0.0017 0.0008 0.0001 0 0 0 0
从表中看出回收的混烃产品中,丙烷以上的组分为78.77%,外输干气中甲烷、乙烷的总组分为93.77%,丙烷以上组分回收率高。
通过对边远井场的天然气组分进行分析,提出了一种混烃回收的系统方法。采用国际上著名的HYSYS软件进行模拟分析研究,研究后表明:采用该系统所得到的混烃产品(饱和蒸汽压≦1.6MPa,混烃常压水露点≦-60℃)满足规范要求,研究提出的混烃回收系统装置能根据不同场站,适应不同气源。该混烃回收系统可以广泛应用在国内偏远井场气、放空气、站点伴生气的回收具有良好的经济效益和社会效益。

Claims (1)

1.一种从井场天然气回收混烃的方法,其特征是:该方法所采用的一种从井场天然气回收混烃的系统,包括分离增压单元、蒸馏回收单元,分离增压单元:包括依次通过管道联接的气液分离器(2)、换热器一(3)、压缩机一(4)、冷却器一(5)、压缩机二(6)、冷却器二(7)、分子筛干燥器(8),所述分子筛干燥器(8)气体出口联接在换热器一(3)加热管进口,换热器一(3)加热管出口依次联接换热器二(13)、节流阀(12)、低温分离器(11),所述换热器二(13)进口联接低温分离器(11)顶部,所述换热器二(13)出口联接出气管道;蒸馏回收单元:包括脱乙烷塔(10),所述脱乙烷塔(10)上部与低温分离器(11)底部联接,所述脱乙烷塔(10)底部联接平衡器(9),所述平衡器(9)联接出气管道;所述脱乙烷塔(10)顶部联接在气液分离器(2)下部,所述脱乙烷塔(10)与气液分离器(2)之间还设置有循环器(14);所述的换热器一(3)、换热器二(13)为板翅式换热器;
该方法包括以下步骤:1)常温常压下原料气(1)首先进入气液分离器(2)上部,除去其中的水分和杂质;原料气(1)在气液分离器(2)内达到气液相平衡后,分离出的部分气相,温度达到17~18℃,压力达到1.4~1.6MPa,从气液分离器(2)顶部依次进入换热器一(3),温度达到36~38℃,压力达到1.4~1.6MPa,进入压缩机一(4),温度达到85~86℃,压力达到2.4~2.5MPa,进入冷却器一(5),温度达到40~45℃,压力达到2.4~2.5MPa,进入压缩机二(6),温度达到105~110℃,压力达到4.7~4.9MPa,进入冷却器二(7),最终温度达到40 ~ 45℃,压力4.7 ~ 4.9MPa ;进入分子筛干燥器(8)脱掉原料气(1)里面的游离水;2)经过增压和脱水后的原料气(1),再返回换热器一(3)给原料气(1)提供热量,温度达到20 ~ 25℃,压力达到4.5 ~ 4.8MPa,再进入换热器二(13)降温至-60 ~ -65℃进入节流阀(12),节流阀(12)在气体节流处形成局部收缩,使得流速增加、温度和压力降低,降温至-70 ~ -74℃进入低温分离器(11)进行低温闪蒸;气液分离器(2)操作温度17 ~ 18℃,压力1.4 ~1.6MPa ;3)闪蒸后的原料气(1)温度-70 ~ -75℃,压力3.5 ~ 3.8MPa 从低温分离器(11)下部进入脱乙烷塔(10);脱乙烷塔(10)下部产品外输至下游;脱乙烷塔(10)塔内重沸器中乙烷的摩尔分数控制在5% ~ 15%,脱乙烷塔(10)塔内精馏操作压力1.5 ~ 1.7MPa,温度65 ~ 70℃;所述低温分离器(11)顶部出来的气体温度-70 ~ -75℃,压力3.5 ~4.0MPa,进入换热器二(13)换热后,温度升为15 ~ 20℃,压力3.5 ~ 4.0MPa 外输至下游。
CN201410339760.5A 2014-07-17 2014-07-17 一种从井场天然气回收混烃的系统及方法 Active CN104132504B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410339760.5A CN104132504B (zh) 2014-07-17 2014-07-17 一种从井场天然气回收混烃的系统及方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410339760.5A CN104132504B (zh) 2014-07-17 2014-07-17 一种从井场天然气回收混烃的系统及方法

Publications (2)

Publication Number Publication Date
CN104132504A CN104132504A (zh) 2014-11-05
CN104132504B true CN104132504B (zh) 2017-04-19

Family

ID=51805283

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410339760.5A Active CN104132504B (zh) 2014-07-17 2014-07-17 一种从井场天然气回收混烃的系统及方法

Country Status (1)

Country Link
CN (1) CN104132504B (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152702B (zh) * 2015-04-23 2019-01-22 廊坊河忠新能源科技有限公司 利用液氮制冷回收油田伴生气中轻烃的方法和设备
CN105157350A (zh) * 2015-10-23 2015-12-16 重庆耐德工业股份有限公司 脱除天然气中重烃的工艺与系统
CN115450603A (zh) * 2022-10-11 2022-12-09 贵州航天天马机电科技有限公司 一种井口高压天然气自动净化及降压发电系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103822438A (zh) * 2012-11-16 2014-05-28 中国石油天然气股份有限公司 一种浅冷轻烃回收工艺方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2732743Y (zh) * 2004-09-17 2005-10-12 西安长庆科技工程有限责任公司 轻烃回收综合装置
CN201678635U (zh) * 2010-03-18 2010-12-22 中国石油化工集团公司 轻烃回收装置
CN201722353U (zh) * 2010-06-18 2011-01-26 霸州市利华燃气储运有限公司 油田伴生气的中压浅冷净化系统
JP4745456B1 (ja) * 2010-12-02 2011-08-10 キャメロンジャパン株式会社 Lpg留分回収装置
CN202016987U (zh) * 2011-01-18 2011-10-26 青岛汇森能源设备有限公司 轻烃回收装置
CN102351625B (zh) * 2011-08-19 2013-11-27 西安长庆科技工程有限责任公司 油田伴生气乙烷回收系统
CN202297494U (zh) * 2011-09-30 2012-07-04 上海森鑫新能源科技有限公司 油田伴生气混合烃回收设备
CN202390376U (zh) * 2011-10-31 2012-08-22 上海森鑫新能源科技有限公司 油田伴生气稳定混合烃回收设备
CN204141934U (zh) * 2014-07-17 2015-02-04 西安长庆科技工程有限责任公司 一种从井场天然气回收混烃的系统

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103822438A (zh) * 2012-11-16 2014-05-28 中国石油天然气股份有限公司 一种浅冷轻烃回收工艺方法

Also Published As

Publication number Publication date
CN104132504A (zh) 2014-11-05

Similar Documents

Publication Publication Date Title
CN204141934U (zh) 一种从井场天然气回收混烃的系统
CN102351625B (zh) 油田伴生气乙烷回收系统
US10760851B2 (en) Simplified method for producing a methane-rich stream and a C2+ hydrocarbon-rich fraction from a feed natural-gas stream, and associated facility
CN106831300B (zh) 一种乙烷回收联产液化天然气的装置与方法
CN101392981B (zh) 利用液化天然气冷量获得液氮的方法及装置
CN103880577B (zh) 用于甲醇制丙烯及甲醇制烯烃的反应产物分离系统
CN105037069B (zh) 一种高压天然气的乙烷回收方法
CN105716371A (zh) 一种混合冷剂制冷天然气轻烃回收的方法及装置
CN104807288B (zh) 高压天然气的凝液回收方法
CN104132504B (zh) 一种从井场天然气回收混烃的系统及方法
CN102408910A (zh) 复合冷剂制冷二次脱烃轻烃回收方法及装置
CN107940893A (zh) 采用冷能轻烃回收的lng冷能梯级利用方法
CN103453730A (zh) 一种带有轻烃回收的天然气液化方法及其装置
CN204981793U (zh) 一种lng冷能应用于油田伴生气的处理装置
CN102304010A (zh) 采用精馏和吸收分离低碳烯烃混合气体的方法
CN109028758A (zh) 一种采用混合冷剂制冷的天然气乙烷回收装置及方法
CN103868324B (zh) 小型撬装式混合制冷剂天然气液化和ngl回收一体系统
CN103175380B (zh) 低浓度煤层气含氧深冷液化制取lng装置
CN214735563U (zh) 一种油田伴生气生产轻烃和lng的系统
CN106595223B (zh) 一种回收天然气中碳三以上重烃的系统和方法
CN104140349A (zh) 一种新型液化天然气的轻烃分离系统及方法
CN203837413U (zh) 一种从天然气提取乙烷混烃的装置
CN203454604U (zh) 带有轻烃回收的天然气液化装置
CN103773529B (zh) 一种撬装式伴生气液化系统
CN202246578U (zh) 复合冷剂制冷二次脱烃轻烃回收装置

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant