CN203533190U - 一种lng加注站用罐泵一体式结构 - Google Patents

一种lng加注站用罐泵一体式结构 Download PDF

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CN203533190U
CN203533190U CN201320654627.XU CN201320654627U CN203533190U CN 203533190 U CN203533190 U CN 203533190U CN 201320654627 U CN201320654627 U CN 201320654627U CN 203533190 U CN203533190 U CN 203533190U
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pump
tank
tank body
valve
lng
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王五开
翟兰惠
王红霞
卫丽霞
王春娟
张健
白华琴
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Shijiazhuang Enric Gas Equipment Co Ltd
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Shijiazhuang Enric Gas Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2201/0104—Shape cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
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    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
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    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
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    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
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    • F17C2227/0142—Pumps with specified pump type, e.g. piston or impulsive type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0171—Arrangement
    • F17C2227/0178—Arrangement in the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
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    • F17C2260/035—Dealing with losses of fluid
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
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    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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Abstract

一种LNG加注站用罐泵一体式结构，结构中包括具有绝热层空间的罐体、罐体底端的虹吸包、设在虹吸包中的泵池，虹吸包中的第一段绝热管路接在泵池上的液化LNG入口，泵池的回气口借助第二段绝热管路与罐体连通，关键在于：在罐体与泵池之间的第一段绝热管路上增设开关阀，回气口与罐体之间的第二段绝热管路上增设截断阀；开关阀和截断阀外分别设置绝热装置保护。这种一体式结构可以节省投资、缩短工期，且可借助阀门方便的检修潜液泵。

Description

一种LNG加注站用罐泵一体式结构
技术领域
    本实用新型属于LNG加注站设备的改进，涉及到LNG加注站应用的储罐、注液泵连接结构的改进，特别是LNG加注站中罐、泵一体式结构。
背景技术
LNG加注站使用低温潜液泵为液化天然气汽车加注燃料，通常将LNG储罐和潜液泵池分别独立设置后相互连接，这种方式建站周期长，而且连通的LNG管道需独立绝热保护，建设成本高。
申请号为201320065885.4的中国专利公开了一种高效节能的立式低温储罐，该储罐结构中包括设置在罐体底端的虹吸包、及与虹吸包配套的绝热仓，潜液泵放置在绝热仓中，绝热仓相当于潜液泵池。但是此结构中储罐与潜液泵池进液管路及回气管路上未设置阀门。在潜液泵需要检修时，需要将储罐内液体放空，才可将潜液泵从绝热仓内取出，拆卸检修费时、费力，给使用带来很大的局限性。因此迫切需要一种既节省投资，又能保证潜液泵可单独检修的新结构。
发明内容
为了节省建设时间和成本，并且方便潜液泵的检修，本实用新型设计了一种LNG加注站用罐泵一体式结构；将潜液泵池与储罐一体式装配制造，管路及泵池做成与储罐一体的夹层保冷结构，但是对于阀门采用单独外包保冷层结构；这种结构可以节省投资、缩短工期，方便潜液泵的检修。
本实用新型的技术方案是：一种LNG加注站用罐泵一体式结构，结构中包括具有绝热层空间的罐体、罐体底端的虹吸包、设在虹吸包中的泵池，虹吸包中的第一段绝热管路接在泵池上的液化LNG入口，泵池的回气口借助第二段绝热管路与罐体连通，关键在于：在罐体与泵池之间的第一段绝热管路上增设开关阀，回气口与罐体之间的第二段绝热管路上增设截断阀；开关阀和截断阀外分别设置绝热装置保护。
本实用新型的有益效果是：1、将潜液泵池设置在储罐底部，与储罐一体式装配制造，虹吸包、泵池、管路a、b的绝热层做成与储罐一体的保冷层结构，改变了以往在储罐一侧单独建造的结构，缩短了连接管路，保冷效果好，节约成本和时间；2、在管路a、b上增设阀门不但可以在运行时使整个装置保持现有技术的优点，而且可以克服必须在清罐时才能检修潜液泵的弊端。本装置可以随时将泵池和罐体隔离，阻断低温液体或回馈气体的通路，实现潜液泵的随机维修。现有阀门所采用的单独外包绝热层结构，检修时拆开可使潜液泵快速回温，使检修方便、安全。
附图说明
    图1是本实用新型的结构示意图；
附图中，1是罐体，1-1代表绝热层空间，2是泵池，3是开关阀，4是截断阀，5是充液阀，6是加液阀，7是潜液泵，8是虹吸包，9是回气口，10出液口，11代表隔热装置，a代表第一段绝热管路，b代表第二段绝热管路，c代表第三段绝热管路。
具体实施方式
一种LNG加注站用罐泵一体式结构，结构中包括具有绝热层空间1-1的罐体1、罐体底端的虹吸包8、设在虹吸包中的泵池2，虹吸包8中的第一段绝热管路a接在泵池2上的液化LNG入口，泵池2的回气口9借助第二段绝热管路b与罐体1连通，关键在于：在罐体1与泵池2之间的第一段绝热管路a上增设开关阀3，回气口9与罐体1之间的第二段绝热管路b上增设截断阀4；开关阀3和截断阀4外分别设置绝热装置11保护。
所述第一段绝热管路a之上、截断阀4与泵池2之间引出第三段绝热管路c、并设置充液阀5。泵池2中潜液泵7的出液口10借助加液阀6与分装LNG容器连接。
为了便于将潜液泵取出的维修，在泵池2上设置有绝热夹层结构的检修门12。
具体实施时，参照图1，将泵池2设置在罐体1外壳下封头底部，作为储罐的配套附件，与储罐一体式装配制造。管路连接后，将罐体1的绝热层空间1-1、泵池2、及管路a、b的绝热夹层一体式绝热保冷；然后将开关阀3、截断阀4外包绝热装置11。需要检修潜液泵7时，将开关阀3、截断阀4、充液阀5、加液阀6关闭，阻断低温液体进入泵池2，拆掉开关阀3、截断阀4的绝热装置11， 待潜液泵7升温后，打开检修门12，从泵池2内取出潜液泵7进行检修。保证了在罐体1内有液时，潜液泵7也能够拆卸维修。 

Claims (4)

1.一种LNG加注站用罐泵一体式结构，结构中包括具有绝热层空间（1-1）的罐体（1）、罐体底端的虹吸包（8）、设在虹吸包中的泵池（2），虹吸包（8）中的第一段绝热管路（a）接在泵池（2）上的液化LNG入口，泵池（2）的回气口（9）借助第二段绝热管路（b）与罐体（1）连通，其特征在于：在罐体（1）与泵池（2）之间的第一段绝热管路（a）上增设开关阀（3），回气口（9）与罐体（1）之间的第二段绝热管路（b）上增设截断阀（4）；开关阀（3）和截断阀（4）外分别设置绝热装置（11）保护。
2.根据权利要求1所述的一种LNG加注站用罐泵一体式结构，其特征在于：所述第一段绝热管路（a）之上、截断阀（4）与泵池（2）之间引出第三段绝热管路（c）、并设置充液阀（5）。
3.根据权利要求1所述的一种LNG加注站用罐泵一体式结构，其特征在于：泵池（2）中潜液泵（7）的出液口（10）借助加液阀（6）与分装LNG容器连接。
4.根据权利要求1所述的一种LNG加注站用罐泵一体式结构，其特征在于：所述泵池（2）上设置有绝热夹层结构的检修门（12）。
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