CN104019627A - 移动式小型撬装lng液化装置 - Google Patents
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- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 17
- 238000005261 decarburization Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000023556 desulfurization Effects 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 101
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 54
- 230000008929 regeneration Effects 0.000 claims description 41
- 238000011069 regeneration method Methods 0.000 claims description 41
- 238000004140 cleaning Methods 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 40
- 238000001179 sorption measurement Methods 0.000 claims description 40
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 32
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 claims description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 27
- 239000001569 carbon dioxide Substances 0.000 claims description 27
- 239000004215 Carbon black (E152) Substances 0.000 claims description 24
- 229930195733 hydrocarbon Natural products 0.000 claims description 24
- 150000002430 hydrocarbons Chemical class 0.000 claims description 24
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 239000001294 propane Substances 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 15
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 claims description 14
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 10
- 150000001412 amines Chemical class 0.000 claims description 10
- 230000001172 regenerating effect Effects 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 8
- 239000012267 brine Substances 0.000 claims description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 4
- 239000010808 liquid waste Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/0045—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by vaporising a liquid return stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
- F25J1/0055—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream originating from an incorporated cascade
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
- F25J1/0212—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a single flow MCR cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0244—Operation; Control and regulation; Instrumentation
- F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
- F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
- F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0259—Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0291—Refrigerant compression by combined gas compression and liquid pumping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/66—Separating acid gases, e.g. CO2, SO2, H2S or RSH
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/68—Separating water or hydrates
Abstract
本发明公开了移动式小型撬装LNG液化装置,它包括以下撬装模块:第一撬装模块:过滤计量脱酸撬;它包括过滤计量调压单元、第一脱碳单元和第二脱碳单元;第二撬装模块:脱水脱硫撬;第三撬装模块:冷箱液化撬;第四撬装模块:LNG储存撬;它包括BOG回流单元和冷剂存储单元;上述连续的撬装模块之间通过高压软管与快速接头连接。本发明具有以下有益效果:1、快速落座,主要体现在设备的布局平衡了撬间重量,使得撬的每个支持点最大重量化、类同化,能够便于落入基础,保证稳定性,同时降低了基础的要求,一般要求基础夯实垒平即可;2、撬间快速连接;3、撬间单元标准化,可实现撬块二次利用,能以最小的代价、最短的时间适应新的工况。
Description
技术领域
本发明涉及一种LNG液化装置,具体为一种移动式小型撬装LNG液化装置。
背景技术
小型撬装LNG液化装置机动灵活,可采集边远零散小气田、煤层气等气源,针对我国天然气资源现状开发极具战略价值。而国内此项技术受制于原料天然气预处理及液化流程计算极其困难,现多采用国外初步设计及液化工艺,实际未能实现移动撬装(多为落地式小型LNG液化工厂,小储量气源采完后基建便浪费),且投资较高、不可移动、能耗较高。现有技术主要液化流程及其缺陷:C3/MRC丙烷预冷混合制冷剂流程设备复杂、能耗低(适应大型LNG装置),不适合撬装型,失去了丙烷预冷的混合制冷剂循环在与膨胀机液化流程竞争时没有多少优势。N2-CH4膨胀机液化流程紧凑、运行灵活、适应性强,但是能耗高(适应于中小型机动LNG装置)。
发明内容
本发明的目的是为了提供一种移动式小型撬装LNG液化装置,以解决现有技术的上述问题。
本发明的目的是通过以下技术方案来实现的。
移动式小型撬装LNG液化装置,它包括以下撬装模块:
第一撬装模块:过滤计量脱酸撬;它包括过滤计量调压单元、第一脱碳单元和第二脱碳单元;
第二撬装模块:脱水脱硫撬;
第三撬装模块:冷箱液化撬;
第四撬装模块:LNG储存撬;它包括BOG回流单元和冷剂存储单元;
上述连续的撬装模块之间通过高压软管与快速接头连接。
所述的过滤计量调压单元包括一原料气气液分离器、原料气压缩机、原料气冷却器和原料气过滤器;所述的原料气气液分离器的顶部设有出料口,分别连通BOG系统和原料气压缩机;经压缩的原料气经过原料气冷却器冷却,再进入原料气过滤器;经过滤的原料气自过滤器顶端进入吸收塔。
所述的第一脱碳单元包括吸收塔、吸收塔顶冷却器、吸收塔顶过滤器和闪蒸罐;经过滤的原料气自吸收塔底部进入,吸收塔顶部依次与吸收塔顶冷却器和吸收塔顶过滤器连通,吸收塔顶过滤器顶部与脱硫脱汞塔系统连通,底部与闪蒸罐连通;闪蒸罐的顶部与外界连通,底部与贫富液换热器连接。
所述的第二脱碳单元包括贫富液换热器、二氧化碳再生塔、二氧化碳冷却器、二氧化碳气液分离器和贫胺缓冲罐;所述的贫富液换热器设有三个出料口,分别与二氧化碳再生塔的上部、底部、贫液冷却器连通;二氧化碳再生塔顶部依次与二氧化碳冷却器和二氧化碳气液分离器连通;二氧化碳气液分离器的底部与贫胺缓冲罐连通;贫液冷却器与贫胺缓冲罐连通。
所述的脱水脱硫撬包括脱硫脱汞塔、两个吸附净化塔、再生气吸附净化塔;再生气加热器、再生气液分离器、净化气过滤器、冷冻盐水冷却器和再生废液分离器;所述的脱硫脱汞塔底部为进料口,顶部为出料口,所述出料口分别与其中两个吸附净化塔的底部连接;两个吸附净化塔的顶部出料口通过净化气过滤器与净化气去液化单元;所述的再生气吸附净化塔与再生气加热器串联,再生气加热器分别接入两个吸附净化塔的出料口;再生气吸附净化塔的底部接入两个吸附净化塔的进料口;再生气吸附净化塔底部依次通过再生气冷却器、冷冻盐水冷却器与再生气液分离器连接;再生气液分离器的顶部接入吸附净化塔的进料口,底部排出废液。
所述的冷箱液化撬包括主换热器、重烃分离器、重烃复热器、冷剂吸入罐、MR一级分离器、MR二级分离器、MR后冷却器、MR增压泵、MR中间冷却器、高压压缩机、低压压缩机;所述的主换热器的一个换热管与净化器过滤器连通,该换热管与重烃分离器串联处理后与LNG储罐连接;重烃分离器的底部依次与重烃复热器和重烃储罐连接;乙烯储罐、丙烷储罐、异戊烷储罐和氮气平衡罐混合后与主换热器的其他换热管连接并形成循环;所有的冷却剂接入冷剂吸入罐,冷剂吸入罐的顶部依次连接低压压缩机、MR中间冷却器和MR一级分离器、高压压缩机、MR后冷却器和MR二级分离器;MR二级分离器的顶部和底部分别与重烃复热器连接;MR后冷却器与冷剂吸入罐连通;MR一级分离器的底部与MR增压泵连接,MR增压泵与MR后冷却器连接。
所述的BOG回流单元包括BOG平衡罐和BOG空温式换热器;所述的BOG平衡罐分别与原料气气液分离器的顶部、LNG储罐连接;所述的冷剂存储单元包括乙烯储罐、丙烷储罐和异戊烷储罐;乙烯储罐、丙烷储罐和异戊烷储罐分别通过乙炔空温式换热器、丙烷吸附净化器和异戊烷吸附净化器,然后接入冷剂吸入罐。
本发明具有快速落座(基础)、撬间快速连接、撬间单元标准化的有益效果:
1、快速落座主要体现在与基础的配合上,和传统的超过1.5m基础浇筑相比,由于我们设备的布局平衡了撬间重量,使得撬的每个支持点最大重量化、类同化,能够便于落入基础,保证稳定性,同时降低了基础的要求,一般要求基础夯实垒平即可;
2、撬间快速连接主要是利用高压软管以及快速接头;
3、撬间单元标准化是在上一条的基础上实现部分系统标准化,这主要是为了撬块二次利用时能以最小的代价、最短的时间适应新的工况。
附图说明
图1为本发明的第一撬装模块过滤计量调压单元装置流程示意图;
图2为本发明的第一撬装模块第一脱碳单元装置流程示意图;
图3为本发明的第一撬装模块第二脱碳单元装置流程示意图;
图4为本发明的第二撬装模块装置流程示意图;
图5为本发明的第三撬装模块装置流程示意图;
图6为本发明的第四撬装模块装置流程示意图;
图中,的箭头号表示管中介质流向。
图中:101、原料气气液分离器102、原料气压缩机103、原料气冷却器104、原料气过滤器105、吸收塔106、吸收塔顶冷却器107、吸收塔顶过滤器108、闪蒸罐109、贫富液换热器110、二氧化碳再生塔111、二氧化碳冷却器112、二氧化碳气液分离器113、贫胺缓冲罐114、贫液冷却器
201、脱硫脱汞塔202、两个吸附净化塔203、再生气吸附净化塔204、再生气加热器205、再生气液分离器206、净化气过滤器207、冷冻盐水冷却器208、再生废液分离器209、再生气冷却器
301、主换热器302、重烃分离器303、重烃复热器304、冷剂吸入罐305、MR一级分离器306、MR二级分离器307、MR后冷却器308、MR增压泵309、MR中间冷却器310、高压压缩机311、低压压缩机312、重烃储罐
401、BOG平衡罐402、BOG空温式换热器403、乙烯储罐404、丙烷储罐405、异戊烷储罐406、乙炔空温式换热器407、丙烷吸附净化器408、异戊烷吸附净化器。
具体实施方式
下面结合附图与具体实施例进一步阐述本发明的技术特点。
移动式小型撬装LNG液化装置,它包括以下撬装模块:
第一撬装模块:过滤计量脱酸撬;它包括过滤计量调压单元、第一脱碳单元和第二脱碳单元;
第二撬装模块:脱水脱硫撬;
第三撬装模块:冷箱液化撬;
第四撬装模块:LNG储存撬;它包括BOG回流单元和冷剂存储单元;
上述连续的撬装模块之间通过高压软管与快速接头连接。
如图1所示,所述的过滤计量调压单元包括一原料气气液分离器、原料气压缩机、原料气冷却器和原料气过滤器;所述的原料气气液分离器的顶部设有出料口,分别连通BOG系统和原料气压缩机;经压缩的原料气经过原料气冷却器冷却,再进入原料气过滤器;经过滤的原料气自过滤器顶端进入吸收塔。
所述的第一脱碳单元包括吸收塔、吸收塔顶冷却器、吸收塔顶过滤器和闪蒸罐;经过滤的原料气自吸收塔底部进入,吸收塔顶部依次与吸收塔顶冷却器和吸收塔顶过滤器连通,吸收塔顶过滤器顶部与脱硫脱汞塔系统连通,底部与闪蒸罐连通;闪蒸罐的顶部与外界连通,底部与贫富液换热器连接。
所述的第二脱碳单元包括贫富液换热器、二氧化碳再生塔、二氧化碳冷却器、二氧化碳气液分离器和贫胺缓冲罐;所述的贫富液换热器设有三个出料口,分别与二氧化碳再生塔的上部、底部、贫液冷却器连通;二氧化碳再生塔顶部依次与二氧化碳冷却器和二氧化碳气液分离器连通;二氧化碳气液分离器的底部与贫胺缓冲罐连通;贫液冷却器与贫胺缓冲罐连通。
如图2所示,所述的脱水脱硫撬包括脱硫脱汞塔、两个吸附净化塔、再生气吸附净化塔;再生气加热器、再生气液分离器、净化气过滤器、冷冻盐水冷却器和再生废液分离器;所述的脱硫脱汞塔底部为进料口,顶部为出料口,所述出料口分别与其中两个吸附净化塔的底部连接;两个吸附净化塔的顶部出料口通过净化气过滤器与净化气去液化单元;所述的再生气吸附净化塔与再生气加热器串联,再生气加热器分别接入两个吸附净化塔的出料口;再生气吸附净化塔的底部接入两个吸附净化塔的进料口;再生气吸附净化塔底部依次通过再生气冷却器、冷冻盐水冷却器与再生气液分离器连接;再生气液分离器的顶部接入吸附净化塔的进料口,底部排出废液。
如图3所示,所述的冷箱液化撬包括主换热器、重烃分离器、重烃复热器、冷剂吸入罐、MR一级分离器、MR二级分离器、MR后冷却器、MR增压泵、MR中间冷却器、高压压缩机、低压压缩机;所述的主换热器的一个换热管与净化器过滤器连通,该换热管与重烃分离器串联处理后与LNG储罐连接;重烃分离器的底部依次与重烃复热器和重烃储罐连接;乙烯储罐、丙烷储罐、异戊烷储罐和氮气平衡罐混合后与主换热器的其他换热管连接并形成循环;所有的冷却剂接入冷剂吸入罐,冷剂吸入罐的顶部依次连接低压压缩机、MR中间冷却器和MR一级分离器、高压压缩机、MR后冷却器和MR二级分离器;MR二级分离器的顶部和底部分别与重烃复热器连接;MR后冷却器与冷剂吸入罐连通;MR一级分离器的底部与MR增压泵连接,MR增压泵与MR后冷却器连接。
如图4所示,所述的BOG回流单元包括BOG平衡罐和BOG空温式换热器;所述的BOG平衡罐分别与原料气气液分离器的顶部、LNG储罐连接;所述的冷剂存储单元包括乙烯储罐、丙烷储罐和异戊烷储罐;乙烯储罐、丙烷储罐和异戊烷储罐分别通过乙炔空温式换热器、丙烷吸附净化器和异戊烷吸附净化器,然后接入冷剂吸入罐。
Claims (7)
1.移动式小型撬装LNG液化装置,其特征在于:它包括以下撬装模块:
第一撬装模块:过滤计量脱酸撬;它包括过滤计量调压单元、第一脱碳单元和第二脱碳单元;
第二撬装模块:脱水脱硫撬;
第三撬装模块:冷箱液化撬;
第四撬装模块:LNG储存撬;它包括BOG回流单元和冷剂存储单元;
上述连续的撬装模块之间通过高压软管与快速接头连接。
2.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的过滤计量调压单元包括一原料气气液分离器、原料气压缩机、原料气冷却器和原料气过滤器;所述的原料气气液分离器的顶部设有出料口,分别连通BOG系统和原料气压缩机;经压缩的原料气经过原料气冷却器冷却,再进入原料气过滤器;经过滤的原料气自过滤器顶端进入吸收塔。
3.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的第一脱碳单元包括吸收塔、吸收塔顶冷却器、吸收塔顶过滤器和闪蒸罐;经过滤的原料气自吸收塔底部进入,吸收塔顶部依次与吸收塔顶冷却器和吸收塔顶过滤器连通,吸收塔顶过滤器顶部与脱硫脱汞塔系统连通,底部与闪蒸罐连通;闪蒸罐的顶部与外界连通,底部与贫富液换热器连接。
4.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的第二脱碳单元包括贫富液换热器、二氧化碳再生塔、二氧化碳冷却器、二氧化碳气液分离器和贫胺缓冲罐;所述的贫富液换热器设有三个出料口,分别与二氧化碳再生塔的上部、底部、贫液冷却器连通;二氧化碳再生塔顶部依次与二氧化碳冷却器和二氧化碳气液分离器连通;二氧化碳气液分离器的底部与贫胺缓冲罐连通;贫液冷却器与贫胺缓冲罐连通。
5.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的脱水脱硫撬包括脱硫脱汞塔、两个吸附净化塔、再生气吸附净化塔;再生气加热器、再生气液分离器、净化气过滤器、冷冻盐水冷却器和再生废液分离器;所述的脱硫脱汞塔底部为进料口,顶部为出料口,所述出料口分别与其中两个吸附净化塔的底部连接;两个吸附净化塔的顶部出料口通过净化气过滤器与净化气去液化单元;所述的再生气吸附净化塔与再生气加热器串联,再生气加热器分别接入两个吸附净化塔的出料口;再生气吸附净化塔的底部接入两个吸附净化塔的进料口;再生气吸附净化塔底部依次通过再生气冷却器、冷冻盐水冷却器与再生气液分离器连接;再生气液分离器的顶部接入吸附净化塔的进料口,底部排出废液。
6.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的冷箱液化撬包括主换热器、重烃分离器、重烃复热器、冷剂吸入罐、MR一级分离器、MR二级分离器、MR后冷却器、MR增压泵、MR中间冷却器、高压压缩机、低压压缩机;所述的主换热器的一个换热管与净化器过滤器连通,该换热管与重烃分离器串联处理后与LNG储罐连接;重烃分离器的底部依次与重烃复热器和重烃储罐连接;乙烯储罐、丙烷储罐、异戊烷储罐和氮气平衡罐混合后与主换热器的其他换热管连接并形成循环;所有的冷却剂接入冷剂吸入罐,冷剂吸入罐的顶部依次连接低压压缩机、MR中间冷却器和MR一级分离器、高压压缩机、MR后冷却器和MR二级分离器;MR二级分离器的顶部和底部分别与重烃复热器连接;MR后冷却器与冷剂吸入罐连通;MR一级分离器的底部与MR增压泵连接,MR增压泵与MR后冷却器连接。
7.根据权利要求1所述的移动式小型撬装LNG液化装置,其特征在于:所述的BOG回流单元包括BOG平衡罐和BOG空温式换热器;所述的BOG平衡罐分别与原料气气液分离器的顶部、LNG储罐连接;所述的冷剂存储单元包括乙烯储罐、丙烷储罐和异戊烷储罐;乙烯储罐、丙烷储罐和异戊烷储罐分别通过乙炔空温式换热器、丙烷吸附净化器和异戊烷吸附净化器,然后接入冷剂吸入罐。
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