CN205226877U - Gaseous recovery reliquefaction device of liquefied natural gas evaporation - Google Patents
Gaseous recovery reliquefaction device of liquefied natural gas evaporation Download PDFInfo
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- CN205226877U CN205226877U CN201520967227.3U CN201520967227U CN205226877U CN 205226877 U CN205226877 U CN 205226877U CN 201520967227 U CN201520967227 U CN 201520967227U CN 205226877 U CN205226877 U CN 205226877U
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- gas
- boil
- heat exchanger
- liquefied natural
- natural gas
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Abstract
The utility model provides a gaseous recovery reliquefaction device of liquefied natural gas evaporation relates to the gas recovery device field, including gaseous buffer tank of evaporation and the gaseous heat exchanger of evaporation, evaporate gaseous buffer tank and be connected with the liquefied natural gas storage tank, and evaporate and be equipped with the pressure gauge on the gaseous buffer tank, evaporating gaseous heat exchanger and being connected with evaporation gas compressor, just it is equipped with the temperature -sensing ware to evaporate gaseous heat exchanger. The utility model discloses simple structure, reasonable in design can evaporate gas by effective recycling, has stopped energy waste, has avoided to pollute and the potential safety hazard all ring edge borders to economic benefits and the social who is showing has been created.
Description
Technical field
The utility model relates to gas concentration unit technical field, particularly a kind of recovery reliquefaction installation of liquefied natural gas boiloff gas.
Background technique
LNG Liquefied natural gas (LNG) is current a kind of desirable clean fuel.The propagation and employment of LNG Liquefied natural gas (LNG) is the very important task of current raising energy utilization rate and social benefit one.
To be rock gas be cooled to dew point temperature to this LNG Liquefied natural gas (LNG) after purification and the cryogenic liquide that formed, and temperature at ambient pressure be-163 DEG C, and it can be stored in low-temperature storage tank that double-deck centre vacuumizes so that transport with load and unload.
Because the ambient temperature of this storage tank is usually above the LNG temperature in this storage tank, under the action of thermal difference of the LNG temperature in ambient temperature and storage tank, the LNG Liquefied natural gas (LNG) in storage tank can be evaporated and be formed boil-off gas (BOG); In addition, load in liquefied natural gas process in this storage tank, the LNG Liquefied natural gas in this storage tank also can evaporate formation boil-off gas; And As time goes on, the boil-off gas in this storage tank gathers more and more, the temperature and pressure in described storage tank can be made to raise gradually; When this pressure exceedes described tank safety valve cracking pressure, namely this safety valve is opened, and is released by described boil-off gas, thus makes described tank inner pressure be down to rating value, to guarantee the safety of described storage tank.
The boil-off gas that described natural gas vaporization produces belongs to greenhouse gases, and these greenhouse effect are 20 times of carbon dioxide, are directly released in air by boil-off gas, will cause the heavy damage to environment.
At present, in large-scale liquefied natural gas (LNG) tank, be provided with torch and emptying delivery system, be used for collecting and processing releasing of described boil-off gas; And small-sized liquefied natural gas (LNG) tank, normally described boil-off gas is directly released in air.In sum, these boil-off gas are directly released in air, or are burnt by flare system, not only waste a large amount of energy and cause direct economic loss, also can pollute surrounding enviroment simultaneously, and cause a hidden trouble to safety of surrounding environment.
Model utility content
(1) technical problem solved
For the deficiencies in the prior art, the utility model provides a kind of recovery reliquefaction installation of liquefied natural gas boiloff gas, effectively can reclaim boil-off gas, has stopped energy waste, can avoid again the pollution that brings surrounding enviroment and potential safety hazard,
(2) technological scheme
For realizing above object, the utility model is achieved by the following technical programs:
A kind of recovery reliquefaction installation of liquefied natural gas boiloff gas, comprise boil-off gas knock out drum and boil-off gas heat exchanger, described boil-off gas knock out drum is connected with boil-off gas heat exchanger with liquefied natural gas (LNG) tank respectively, and boil-off gas knock out drum is provided with pressure meter, described boil-off gas heat exchanger is connected with boil-off gas compressor, and boil-off gas heat exchanger is provided with temperature inductor.
Preferably, described boil-off gas heat exchanger top the right and left is respectively equipped with liquid nitrogen entrance and liquid nitrogen outlet, and described boil-off gas heat exchanger inside is provided with condenser coil.
Preferably, described liquid nitrogen entrance is connected with condenser coil upper end, and described liquid nitrogen outlet is connected with condenser coil lower end.
Preferably, between described liquefied natural gas (LNG) tank and boil-off gas knock out drum, be provided with pneumatic valve, between described boil-off gas knock out drum and boil-off gas heat exchanger, be provided with pneumatic valve, between described boil-off gas heat exchanger and boil-off gas compressor, be provided with pneumatic valve.
(3) beneficial effect
The recovery reliquefaction installation of the utility model liquefied natural gas boiloff gas, structure is simple, reasonable in design, utilize liquid nitrogen to carry out heat exchange to boil-off gas and reduce its temperature, recompression is reclaimed and is formed liquified natural gas (LNG), effectively can reclaim boil-off gas, stop energy waste, avoid and surrounding enviroment are polluted and potential safety hazard, thus create significant economic benefit and social benefit.
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 only 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, liquefied natural gas (LNG) tank; 2 boil-off gas knock out drums; 21, pressure meter; 3, boil-off gas heat exchanger; 31, liquid nitrogen entrance; 32, liquid nitrogen outlet; 33, condenser coil; 34, temperature inductor; 4, boil-off gas compressor; Q1, Q2, Q3 are pneumatic valve.
Embodiment
For making 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.
With reference to shown in Fig. 1, a kind of recovery reliquefaction installation of liquefied natural gas boiloff gas, comprise boil-off gas knock out drum 2 and boil-off gas heat exchanger 3, boil-off gas knock out drum 2 is connected with boil-off gas heat exchanger 3 with liquefied natural gas (LNG) tank 1 respectively, and boil-off gas knock out drum 2 is provided with pressure meter 21, boil-off gas heat exchanger 3 is connected with boil-off gas compressor 4, and boil-off gas heat exchanger 3 is provided with temperature inductor 34, boil-off gas heat exchanger 3 top the right and left is respectively equipped with liquid nitrogen entrance 31 and liquid nitrogen outlet 32, boil-off gas heat exchanger 3 inside is provided with condenser coil 33, liquid nitrogen entrance 31 is connected with condenser coil 33 upper end, liquid nitrogen outlet 32 is connected with condenser coil 33 lower end, pneumatic valve Q1 is provided with between liquefied natural gas (LNG) tank 1 and boil-off gas knock out drum 2, pneumatic valve Q2 is provided with between boil-off gas knock out drum 2 and boil-off gas heat exchanger 3, pneumatic valve Q3 is provided with between boil-off gas heat exchanger 3 and boil-off gas compressor 4.
The recovery reliquefaction installation of this liquefied natural gas boiloff gas, boil-off gas enters boil-off gas knock out drum 2 by pipeline by liquefied natural gas (LNG) tank 1 and stores.When pressure meter 21 reading on boil-off gas knock out drum 2 is close to maximum value, pneumatic valve Q1 automatically closes and stops carrying boil-off gas to boil-off gas knock out drum 2, meanwhile pneumatic valve Q2 opens automatically, and boil-off gas enters into boil-off gas heat exchanger 3 by boil-off gas knock out drum 2 and carries out heat exchange with liquid nitrogen.When temperature inductor 34 shows that in boil-off gas heat exchanger 3, boil-off gas temperature is lower than-163 DEG C, pneumatic valve Q2 closes and pneumatic valve Q3 opens simultaneously, and boil-off gas forms liquified natural gas by boil-off gas compressor 4 pressure recovery.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment's technological scheme of the utility model.
Claims (4)
1. the recovery reliquefaction installation of a liquefied natural gas boiloff gas, comprise boil-off gas knock out drum (2) and boil-off gas heat exchanger (3), it is characterized in that, described boil-off gas knock out drum (2) is connected with boil-off gas heat exchanger (3) with liquefied natural gas (LNG) tank (1) respectively, and boil-off gas knock out drum (2) is provided with pressure meter (21), described boil-off gas heat exchanger (3) is connected with boil-off gas compressor (4), and boil-off gas heat exchanger (3) is provided with temperature inductor (34).
2. the recovery reliquefaction installation of liquefied natural gas boiloff gas according to claim 1, it is characterized in that, described boil-off gas heat exchanger (3) top the right and left is respectively equipped with liquid nitrogen entrance (31) and liquid nitrogen outlet (32), and described boil-off gas heat exchanger (3) inside is provided with condenser coil (33).
3. the recovery reliquefaction installation of liquefied natural gas boiloff gas according to claim 1, it is characterized in that, described liquid nitrogen entrance (31) is connected with condenser coil (33) upper end, and described liquid nitrogen outlet (32) is connected with condenser coil (33) lower end.
4. the recovery reliquefaction installation of liquefied natural gas boiloff gas according to claim 1, it is characterized in that, pneumatic valve Q1 is provided with between described liquefied natural gas (LNG) tank (1) and boil-off gas knock out drum (2), be provided with pneumatic valve Q2 between described boil-off gas knock out drum (2) and boil-off gas heat exchanger (3), between described boil-off gas heat exchanger (3) and boil-off gas compressor (4), be provided with pneumatic valve Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967227.3U CN205226877U (en) | 2015-11-26 | 2015-11-26 | Gaseous recovery reliquefaction device of liquefied natural gas evaporation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520967227.3U CN205226877U (en) | 2015-11-26 | 2015-11-26 | Gaseous recovery reliquefaction device of liquefied natural gas evaporation |
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| Publication Number | Publication Date |
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| CN205226877U true CN205226877U (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520967227.3U Expired - Fee Related CN205226877U (en) | 2015-11-26 | 2015-11-26 | Gaseous recovery reliquefaction device of liquefied natural gas evaporation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953525A (en) * | 2016-06-24 | 2016-09-21 | 无锡市豫达换热器有限公司 | Novel nitrogen condensation type natural gas heat exchanger |
-
2015
- 2015-11-26 CN CN201520967227.3U patent/CN205226877U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105953525A (en) * | 2016-06-24 | 2016-09-21 | 无锡市豫达换热器有限公司 | Novel nitrogen condensation type natural gas heat exchanger |
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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: 20160511 Termination date: 20161126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |