CN204345255U - Unload liquid-phase tube thread control device in a kind of LNG skid station - Google Patents
Unload liquid-phase tube thread control device in a kind of LNG skid station Download PDFInfo
- Publication number
- CN204345255U CN204345255U CN201420426525.7U CN201420426525U CN204345255U CN 204345255 U CN204345255 U CN 204345255U CN 201420426525 U CN201420426525 U CN 201420426525U CN 204345255 U CN204345255 U CN 204345255U
- Authority
- CN
- China
- Prior art keywords
- valve
- liquid phase
- pipeline
- liquid
- cooling
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to natural gas storage field application, is a kind of LNG skid station unloading unit specifically.Comprise liquid phase main valve, liquid phase pipeline and gradient pipeline cooling device; Described liquid phase main valve is manual major axis stop valve, and one end connects tank car liquid phase interface or liquid phase pneumatic valve, and the other end connects the liquid phase pipeline of unload flexible pipe, slowly opens, opened manually speed and opening degree during operation; Described liquid phase pipeline lateral gap is enclosed with gradient pipeline cooling device, described gradient pipeline cooling device is by inlet valve, feed liquor nitrogen valve, cooling tube chamber, outlet valve, go out nitrogen valve composition, described inlet valve is connected with cooling official jargon by the first threeway with feed liquor nitrogen valve, is positioned at nearly liquid phase main valve one end; Described outlet valve, go out nitrogen valve by the second threeway with cooling official jargon be connected, be positioned at liquid phase main valve one end far away; By first carrying out cold water cooling, then carrying out the gradient cooling mode of liquid nitrogen cooling, pipeline quenching when avoiding precooling, extending pipeline working life.
Description
Technical field
The utility model relates to natural gas storage field application, is unload liquid-phase tube thread control device in a kind of LNG skid station specifically.
Background technique
LNG skid-mounted gas filling station maneuverability, takes up an area few.Do not rely on gas distributing system, only need deliver LNG as source of the gas with LNG tank car.In standing, all manufacturing equipments are all arranged on a sledge block, and overall dimensions is less; Control system is arranged in the standard container of a repacking; Before filling LNG, the overall gross mass of gas station is light, is very suitable for using car carrying.Gas station place can be changed at any time according to the market demand, particularly suitable in city, applied range.
Need before LNG unloads to input duct precooling, prior art first opens unloading deck from pressurization system to tank car supercharging, unloading deck vaporizer vaporization ability is 200 standard cubes m/h, add less about 1 ~ 2 side of gas-phase space in tank car, need the pipeline of precooling longer, need a large amount of BOG, with the BOG limited amount that unloading deck gasification produces, not forming convection current with BOG, slowly, not thoroughly, and there is the blind area between blind area feed liquor one-way valve to unloading deck liquid inlet control valve in precooling speed.If precooling is not thorough, because the temperature difference is too large, serious expanding with heat and contract with cold makes pipe deforming, departs from buttress, even causes pipeline burst, lead to security incident.
What the employing of liquid phase main valve was unloaded at LNG skid station built at present simultaneously is pneumatic valve, pneumatic valve can pneumatic also can be manual, when unloading according to operating process of unloading, liquid-phase tube valve operation will slowly be opened, pneumatic valve operation is difficult to grasp aperture and easily causes pipeline quenching and damage pipeline, frequent action pneumatic valve also can cause pneumatic valve to be not closed completely, and maintenance expenses is higher, engineering time is longer.
Model utility content
The utility model is flexible operation when being unloaded liquid by cold-peace pre-after pneumatic valve being changed into manual major axis stop valve, adds gradient pipeline cooling device, can not cause pipeline quenching, easy to maintenance, cost is low when unloading; Can ensure that safety is unloaded, and ensures gas station safe operation.
The utility model for achieving the above object, provides a kind of LNG skid station to unload liquid-phase tube thread control device, comprising: liquid phase main valve, liquid phase pipeline and gradient pipeline cooling device; Described liquid phase main valve is manual major axis stop valve, and one end connects tank car liquid phase interface or liquid phase pneumatic valve, and the other end connects the liquid phase pipeline of unload flexible pipe, slowly opens, opened manually speed and opening degree during operation; Described liquid phase pipeline lateral gap is enclosed with gradient pipeline cooling device, described gradient pipeline cooling device is by inlet valve, feed liquor nitrogen valve, cooling tube chamber, outlet valve, go out nitrogen valve composition, described inlet valve is connected with cooling official jargon by the first threeway with feed liquor nitrogen valve, is positioned at nearly liquid phase main valve one end; Described outlet valve, go out nitrogen valve by the second threeway with cooling official jargon be connected, be positioned at liquid phase main valve one end far away; By first carrying out cold water cooling, then carrying out the gradient cooling mode of liquid nitrogen cooling, pipeline quenching when avoiding precooling, extending pipeline working life.
Further, described go out liquid nitrogen valve be connected with compression refigerating machine, the described compression refigerating machine described reflux pump that is connected with reflux pump is connected with liquid nitrogen container and keeps malleation to liquid nitrogen container, forms peripheral passage, prevents liquid nitrogen from flowing into frostbite operator convenient cooling simultaneously in air.
Further, described outlet valve is connected with refrigerator, and described refrigerator is connected with reflux pump, and described reflux pump is connected with water pot and keeps malleation to water pot, forms peripheral passage, convenient cooling.
Further, described liquid phase main valve 1 place is also provided with LNG leakage alarming device 4, when valve closing is tight or appearance is leaked, and alarm, avoid the generation of security incident.
During use, stop to specified position at shipping container or tank car that LNG is housed, connect ground wire, then unload flexible pipe is connected, when carrying out pipeline section and meeting the cold stage, first open inlet valve and outlet valve carries out pipeline cooling, then open aerating equipment and carry out pressure pipeline precooling, open feed liquor nitrogen valve simultaneously and go out liquid nitrogen valve, carrying out circulation temperature lowering, crack liquid-phase tube valve after gas phase purges, to unloading, liquid phase flexible pipe purges, and after gas-liquid equilibrium, unloads, after unload unload flexible pipe, complete operation of this time unloading.
The beneficial effects of the utility model are: flexible operation when pre-cold-peace unloads liquid after 1, pneumatic valve being changed into manual major axis stop valve, can accomplish slowly to open liquid-phase tube valve, avoid pipeline quenching; 2, gradient pipeline cooling device better can protect pipeline, extends pipeline working life; 3, each maintenance of valve is convenient, can ensure that safety is unloaded, ensure the safe operation of gas station after adding warning device.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model;
In figure: 1 liquid phase main valve, 2 liquid phase pipelines, 3 gradient pipeline cooling devices, 31 inlet valves, 32 feed liquor nitrogen valves, 33 cooling tube chambers, 34 outlet valves, 35 go out nitrogen valve, 36 first threeways, 37 second threeways, 4LNG leakage alarming device.
embodiment
Make the object of the utility model embodiment, technological scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1:
Automobile-used liquid phase valve device is unloaded at LNG skid station as shown in Figure 1, comprising: liquid phase main valve 1, liquid phase pipeline 2 and gradient pipeline cooling device 3; Described liquid phase main valve 1 is manual major axis stop valve, and one end connects tank car liquid phase interface or liquid phase pneumatic valve, and the other end connects the liquid phase pipeline 2 of unload flexible pipe, slowly opens, opened manually speed and opening degree during operation; Described liquid phase pipeline 2 lateral gap is enclosed with gradient pipeline cooling device 3, described gradient pipeline cooling device 3 is by inlet valve 31, feed liquor nitrogen valve 32, cooling tube chamber 33, outlet valve 34, go out nitrogen valve 35 and form, described inlet valve 31 is connected with cooling official jargon 33 by the first threeway 36 with feed liquor nitrogen valve 32, is positioned at nearly liquid phase main valve 1 one end; Described outlet valve 34, go out nitrogen valve 35 by the second threeway 37 with cooling official jargon 33 be connected, be positioned at liquid phase main valve 1 one end far away; By first carrying out cold water cooling, then carrying out the gradient cooling mode of liquid nitrogen cooling, pipeline quenching when avoiding precooling, extending pipeline working life.Described liquid phase main valve 1 place is also provided with LNG leakage alarming device 4, when valve closing is tight or appearance is leaked, and alarm, avoid the generation of security incident.
Again inlet valve 31 is connected with water pot, feed liquor nitrogen valve 33 is connected with liquid nitrogen container, go out liquid nitrogen valve 35 to be connected with compression refigerating machine, the described compression refigerating machine described reflux pump that is connected with reflux pump is connected with liquid nitrogen container and keeps malleation to liquid nitrogen container, form peripheral passage, prevent liquid nitrogen from flowing into frostbite operator convenient cooling simultaneously in air.Be connected with refrigerator by outlet valve 34, described refrigerator is connected with reflux pump simultaneously, and described reflux pump is connected with water pot and keeps malleation to water pot, forms peripheral passage, and convenient cooling, reduces water resource waste.
During use, stop to specified position at shipping container or tank car that LNG is housed, connect ground wire, then unload flexible pipe is connected, when carrying out pipeline section and meeting the cold stage, first open cold valves and water reflux valve carries out pipeline cooling, then open aerating equipment and carry out pressure pipeline precooling, open liquid nitrogen valve and liquid nitrogen reflux valve simultaneously, carry out circulation temperature lowering, crack liquid-phase tube valve after gas phase purges, to unloading, liquid phase flexible pipe purges, and after gas-liquid equilibrium, unloads, after unload unload flexible pipe, complete operation of this time unloading.
Below the utility model is described in detail, the above, be only the preferred embodiment of the utility model, when not limiting the scope of the present invention, namely allly do impartial change according to the application's scope and modify, all should still belong in the utility model covering scope.
Claims (5)
1. unload a liquid-phase tube thread control device in LNG skid station, it is characterized in that: comprise liquid phase main valve (1), liquid phase pipeline (2) and gradient pipeline cooling device (3); Described liquid phase main valve (1) is hand stop valve, and one end connects tank car liquid phase interface or liquid phase pneumatic valve, and the other end connects the liquid phase pipeline (2) of unload flexible pipe; Described liquid phase pipeline (2) lateral gap is enclosed with gradient pipeline cooling device (3), described gradient pipeline cooling device (3) is by inlet valve (31), feed liquor nitrogen valve (32), cooling tube chamber (33), outlet valve (34), go out nitrogen valve (35) composition, described inlet valve (31) is connected with cooling official jargon (33) by the first threeway (36) with feed liquor nitrogen valve (32), is positioned at nearly liquid phase main valve (1) one end; Described outlet valve (34), go out nitrogen valve (35) by the second threeway (37) with cooling official jargon (33) be connected, be positioned at liquid phase main valve (1) one end far away.
2. unload liquid-phase tube thread control device in LNG skid station as claimed in claim 1, it is characterized in that: described in go out nitrogen valve (35) and be connected with compression refigerating machine, the described compression refigerating machine described reflux pump that is connected with reflux pump is connected with liquid nitrogen container and keeps malleation to liquid nitrogen container.
3. unload liquid-phase tube thread control device in LNG skid station as claimed in claim 1 or 2, and it is characterized in that: described outlet valve (34) is connected with refrigerator, and described refrigerator is connected with reflux pump, described reflux pump is connected with water pot and keeps malleation to water pot.
4. unload liquid-phase tube thread control device in LNG skid station as claimed in claim 1 or 2, it is characterized in that: described liquid phase main valve (1) place is also provided with LNG leakage alarming device (4).
5. unload liquid-phase tube thread control device in LNG skid station as claimed in claim 3, it is characterized in that: described liquid phase main valve (1) place is also provided with LNG leakage alarming device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420426525.7U CN204345255U (en) | 2014-07-30 | 2014-07-30 | Unload liquid-phase tube thread control device in a kind of LNG skid station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420426525.7U CN204345255U (en) | 2014-07-30 | 2014-07-30 | Unload liquid-phase tube thread control device in a kind of LNG skid station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204345255U true CN204345255U (en) | 2015-05-20 |
Family
ID=53228523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420426525.7U Expired - Fee Related CN204345255U (en) | 2014-07-30 | 2014-07-30 | Unload liquid-phase tube thread control device in a kind of LNG skid station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204345255U (en) |
-
2014
- 2014-07-30 CN CN201420426525.7U patent/CN204345255U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105510140B (en) | A kind of pressure-resistant explosion bulge test system and method for low-temperature deep pressure vessel | |
| WO2008091373A3 (en) | Container for transport and storage for compressed natural gas | |
| CN110094207B (en) | Artificial stratum freezing system and method for low-temperature nitrogen circulating refrigeration | |
| WO2017040550A1 (en) | Gas fueling systems and methods with minimum and/or no cooling | |
| BR112016023537B1 (en) | Tool, system and method for draining and refilling cryogenic fuel in a vehicle tank | |
| FI3640128T3 (en) | Re-liquefaction system of evaporative gas and ship | |
| CN204345255U (en) | Unload liquid-phase tube thread control device in a kind of LNG skid station | |
| CN110805831A (en) | Recovery process and device for liquid-phase ethane pipeline emptying liquid | |
| KR101606574B1 (en) | Loading And Unloading System For CGL Ship | |
| CN204387677U (en) | A kind of skid-mounted gas filling station | |
| CN208703560U (en) | A kind of LNG Quick-unloading system recycling BOG gas | |
| KR200439454Y1 (en) | Evaporator and evaporating system | |
| KR20180073014A (en) | Gas supplying apparatus | |
| WO2016088159A1 (en) | Equipment safety management device, equipment safety management method, and natural gas liquefaction device | |
| CN203687642U (en) | Liquid nitrogen water circulation device | |
| CN209943989U (en) | Liquid hydrocarbon pipeline structure with precooling line | |
| EP2364413B1 (en) | Method to increase gas mass flow injection rates to gas storage caverns using lng | |
| CN104565809B (en) | CNG (compressed natural gas) filling and CNG liquefying filling combined device | |
| KR20190137463A (en) | Device for preventing water hammering of pipe, and the method | |
| CN207018716U (en) | A kind of decompressor | |
| CN104514980A (en) | Liquefied natural gas unloading booster skid | |
| US2537815A (en) | Gas distribution method and apparatus | |
| KR101599359B1 (en) | Vessel for supplying liquefied fuel gas | |
| US2956413A (en) | Method and apparatus for dispensing liquid fuel | |
| CN204005227U (en) | A kind of cryogenic gas condensation cycle system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20170730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |