CN203810038U - Self-balancing re-liquefying system - Google Patents
Self-balancing re-liquefying system Download PDFInfo
- Publication number
- CN203810038U CN203810038U CN201420222996.6U CN201420222996U CN203810038U CN 203810038 U CN203810038 U CN 203810038U CN 201420222996 U CN201420222996 U CN 201420222996U CN 203810038 U CN203810038 U CN 203810038U
- Authority
- CN
- China
- Prior art keywords
- lng
- heat exchanger
- storage tank
- tank
- control valve
- 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
- 239000000446 fuel Substances 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims description 10
- 239000003949 liquefied natural gas Substances 0.000 abstract description 63
- 239000007789 gas Substances 0.000 abstract description 11
- 238000002309 gasification Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses a self-balancing re-liquefying system, by virtue of which, the pressure in a fuel storage cabin keeps a relatively low level during sailing. An LNG (Liquefied Natural Gas) lightering pump of the re-liquefying system is connected with a daily tank; the top of an LNG storage tank is connected with a compressing unit; the compressing unit is connected with a generator unit and further is connected with the daily tank through a pressure control valve and a sleeve pipe type heat exchanger in sequence; the daily tank is connected with a master machine through an LNG pressurizing pump and two sleeve pipe type heat exchanger; when compressed BOG (Boil Off Gas) cannot be completely consumed by the generator unit, the redundant high-temperature BOG enters the outer pipes of the sleeve pipe type heat exchangers through the bypass of the pressure control valve; the BOG in sleeve pipes is cooled by virtue of the coolness formed by gasification of low-temperature LNG discharged by the LNG pressurizing pump; spraying is carried out at the bottom of the daily tank to realize re-liquefying. According to the self-balancing re-liquefying system, the redundant BOG in the LNG storage tank is re-liquefied; meanwhile, the cold energy generated by gasification of LNG in a gas supply system is used for reducing the pressure of the LNG storage tank and increasing the time of pressure accumulation of the LNG storage tank during stop in a harbor.
Description
Technical field
The utility model relates to a kind of self-balancing type liquefaction system again, makes fuel storage cabin internal pressure when navigation, keep reduced levels always.
Background technique
In recent years, along with pollution of atmosphere is day by day serious, the whole world is to the day by day serious lattice of the control of the gas discharging of boats and ships.The developed countries such as America and Europe have set up the control zone of oneself, reach at the appointed time TierII and TierIII emission standard.For solving the severe contamination problem in the Changjiang river and Zhujiang River waters, Chinese Government, in 12 planning, has planned " gasification the Changjiang river " and " the gasification Zhujiang River " engineering.
Boats and ships natural gas fuel can reduce more than 30% carbon emission and the fuel cost of discharged nitrous oxides, more than 98% sulfide emission and 30% left and right.Therefore, boats and ships use instead rock gas be fuel be energy-saving and emission-reduction, improve transport benefits the most directly, effective measures.In recent years, nearly all shipowner is transformed into its existing ship to take the boats and ships that LNG is main fuel considering, is at least transformed into take the boats and ships that LNG is auxiliary fuel, to use LNG in emission control district, Neng various countries, reaches emission standard.Nearly all shipyard all be take the various boats and ships that LNG is fuel consider building, and China first take the double fuel tugboat project that LNG is main fuel and be successfully delivered for use.
LNG Liquefied natural gas aboard ship stores, and concerning with MAN ME-GI main frame, the processing of BOG flash steam is a difficult problem.General liquefaction system is again set, and shipbuilding cost can increase greatly; BOG flash steam is directly compressed to 300bar, and not only compressor cost is high, and power consumption is also very large.
Summary of the invention
In order to solve problems of the prior art, the utility model provides a kind of self-balancing type liquefaction system again, being used for solving BOG flash steam in storage cabin cannot all be consumed by generator set, and lower storage cabin pressure while keeping navigation, reaches longer stopping the port pressure accumulation time.
The technical solution adopted in the utility model is: a kind of self-balancing type is liquefaction system again, it comprises LNG storage tank, at LNG storage tank Inner, be provided with LNG transportation by lighter pump and upper spraying tube, it also comprises compressor unit, LNG suction booster, working tank, the first bushing formula heat exchanger and the second bushing formula heat exchanger, described LNG transportation by lighter pump adopts pipeline to be connected with working tank through the first control valve, the first control valve adopts pipeline to be connected with upper spraying tube through upper spray control valve, the top of described LNG storage tank adopts pipeline to be connected with compressor unit through the second control valve, compressor unit adopts pipeline to be connected with generator unit through the 3rd control valve, also successively through pressure controlled valve, the first bushing formula heat exchanger is connected with working tank, described working tank adopts pipeline successively through LNG suction booster, the first bushing formula heat exchanger is connected with the fuel feed pipe of main frame with the second bushing formula heat exchanger.
The beneficial effects of the utility model are: this self-balancing type again LNG transportation by lighter pump of liquefaction system is connected with working tank, the top of LNG storage tank is connected with compressor unit, compressor unit is connected with generator unit, compressor unit is also connected with working tank through pressure controlled valve, the first bushing formula heat exchanger successively, and working tank is connected with the fuel feed pipe of main frame through LNG suction booster, the first bushing formula heat exchanger and the second bushing formula heat exchanger.When generator unit cannot all consume the BOG flash steam after compression, unnecessary high temperature BOG flash steam enters in the outer tube of the first bushing formula heat exchanger by pressure controlled valve bypass, the LNG that utilizes LNG suction booster the to discharge low temperature formed cold energy that gasifies carries out cooling down to the BOG flash steam in sleeve pipe, spray realization liquefy in working tank bottom.This again liquefaction system realized unnecessary BOG flash steam in LNG storage tank liquefied again, utilize the cold energy that in air supply system, LNG gasification produces simultaneously, reduce LNG pressure of storage tank and increase stopping the port pressure accumulation time of LNG storage tank.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated
Fig. 1 is a kind of self-balancing type fundamental diagram of liquefaction system again.
In figure: 1, LNG transportation by lighter pump, 1a, the first control valve, 2, LNG storage tank, 3, compressor unit, 3a, the second control valve, 4, LNG suction booster, 5, working tank, 5a, lower spray pipeline, 5b, safety valve, 6, the first bushing formula heat exchanger, the 7, second bushing formula heat exchanger, 8, generator unit, 8a, the 3rd control valve, 9, pressure controlled valve, 10, upper spraying tube, 10a, upper spray control valve.
Embodiment
Fig. 1 shows a kind of self-balancing type fundamental diagram of liquefaction system again.In figure, self-balancing type again liquefaction system comprises LNG storage tank 2, compressor unit 3, LNG suction booster 4, working tank 5, the first bushing formula heat exchanger 6 and the second bushing formula heat exchanger 7, at LNG storage tank 2 Inner, is provided with LNG transportation by lighter pump 1 and upper spraying tube 10.LNG transportation by lighter pump 1 adopts pipeline to be connected with working tank 5 through the first control valve 1a, the first control valve 1a adopts pipeline to be connected with upper spraying tube 10 through upper spray control valve 10a, the top of described LNG storage tank 2 adopts pipeline to be connected with compressor unit 3 through the second control valve 3a, compressor unit 3 adopts pipeline to be connected with generator unit 8 through the 3rd control valve 8a, also successively through pressure controlled valve 9, the first bushing formula heat exchanger 6 is connected with working tank 5, described working tank 5 adopts pipeline successively through LNG suction booster 4, the first bushing formula heat exchanger 6 is connected with the fuel feed pipe of main frame with the second bushing formula heat exchanger 7.
Adopt the above-mentioned self-balancing type work self-balancing type working principle of liquefaction system again of liquefaction system again:
(a) compressor unit 3 is compressed to 6-6.5bar by the interior BOG flash steam of LNG storage tank 2, and after temperature is increased to 25-40 ℃, supply generator unit 8 is used.
(b) LNG transportation by lighter pump 1 continuous operation is lightered the interior LNG liquid of LNG storage tank 2 in working tank 5, a LNG liquid sprays in LNG storage tank 2 through upper spraying tube 10 by upper spray control valve 10a, regulate and inject working tank 5 flows, the interior liquid level of working tank 5 is maintained to a constant liquid level.I.e. " injection amount "+" the unnecessary BOG flash steam of compressor unit "=" LNG suction booster discharge capacity "=" main frame consumption ".Pressure in working tank 5 depends on the unnecessary BOG flash steam flow that compressor unit 3 is discharged, and is conventionally controlled at 0-6.5bar.G, and when pressure is during higher than 6.5bar, compressor 3 can reduce discharge capacity automatically, and working tank 5 internal pressures are maintained in 6.5bar.
(c) LNG suction booster 4 is the LNG liquid in working tank 5 (132 ℃) to be pressurized to 300bar be drained into heating/gasification in the first bushing formula heat exchanger 6 and the second bushing formula heat exchanger 7 afterwards, the final main frame of supplying with uses, supply gas pressure is 300bar, and feed air temperature is 20 ℃.
(d) pressure set-point of pressure controlled valve 9 is 6.2bar, when compressor goes out pressure and reaches 6.2bar, pressure controlled valve 9 is opened, and the unnecessary BOG flash steam that cannot be consumed by generator unit is bypassed to the outer pipeline of the first bushing formula heat exchanger 6 and carries out heat exchange with the LNG liquid that LNG suction booster 4 is discharged.The first bushing formula heat exchanger 6 outlet BOG flash steam temperature are about-70 ℃, and cooled BOG flash steam enters into working tank 5 by lower spray pipeline 5a and completes self-balancing type and liquefy.
Below in conjunction with operation technique, require to be further detailed:
One, compressor unit
Adopt one or more levels without oily piston type, one or more levels oil free screw formula, one or more levels is without the centrifugal gas at normal temperature compressor of oil.When adopting two stage compressor, gas discharged by compressor and/or intergrade heat energy can both be for heating suction gas, and when the advantage of employing multistage compressor is to compress same units arrival setting value, required energy is far smaller than the energy that single stage compressor consumes.And carry out cryogenic natural gas that Multi-stage heating can make to suck to reach satisfied temperature more stable sucking gas with discharging gas and intergrade.This compressor unit by the BOG flash steam in storage tank release compression after send in heat exchanger.
Two, heat exchanger
Native system heat exchanger is bushing formula heat exchanger, be divided into two sections, one section is the first bushing formula heat exchanger 6, inner tube medium is LNG liquid, and medium in the outer layer sleeve normal temperature BOG flash steam after to be compressor process, another section is the second bushing formula heat exchanger 7, and inner tube medium is LNG/NG, and medium in outer layer sleeve is water glycol.This design of heat exchanger pressure is 300bar.Normal temperature BOG flash steam and low temperature LNG liquid by double pipe heat exchanger carry out exchange heat, make the temperature of normal temperature BOG flash steam gas be reduced to-70 ℃.
Native system also can adopt shell pipe type, board-like and other forms of heat exchanger.
Three, LNG pump
LNG transportation by lighter pump 1 is lightered the LNG liquid in LNG storage tank 2 in working tank 5, and maintains the liquid level of a setting, and the injection amount that LNG transportation by lighter pump 1 injects in working tank 5 regulates by upper spray control valve 10a; LGN suction booster 4 is pressurized to 300bar by LNG liquid in working tank 5 and is drained into successively and in the first bushing formula heat exchanger 6 and the second bushing formula heat exchanger 7, supplies with main frame and use.
Claims (1)
1. self-balancing type liquefaction system again, it comprises LNG storage tank (2), at LNG storage tank (2) Inner, be provided with LNG transportation by lighter pump (1) and upper spraying tube (10), it is characterized in that: further comprising compressor unit (3), LNG suction booster (4), working tank (5), the first bushing formula heat exchanger (6) and the second bushing formula heat exchanger (7), described LNG transportation by lighter pump (1) adopts pipeline to be connected with working tank (5) through the first control valve (1a), the first control valve (1a) adopts pipeline to be connected with upper spraying tube (10) through upper spray control valve (10a), the top of described LNG storage tank (2) adopts pipeline to be connected with compressor unit (3) through the second control valve (3a), compressor unit (3) adopts pipeline to be connected with generator unit (8) through the 3rd control valve (8a), also successively through pressure controlled valve (9), the first bushing formula heat exchanger (6) is connected with working tank (5), described working tank (5) adopts pipeline successively through LNG suction booster (4), the first bushing formula heat exchanger (6) is connected with the fuel feed pipe of main frame with the second bushing formula heat exchanger (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420222996.6U CN203810038U (en) | 2014-05-04 | 2014-05-04 | Self-balancing re-liquefying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420222996.6U CN203810038U (en) | 2014-05-04 | 2014-05-04 | Self-balancing re-liquefying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810038U true CN203810038U (en) | 2014-09-03 |
Family
ID=51448786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420222996.6U Expired - Fee Related CN203810038U (en) | 2014-05-04 | 2014-05-04 | Self-balancing re-liquefying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203810038U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953848A (en) * | 2014-05-04 | 2014-07-30 | 国鸿液化气机械工程（大连）有限公司 | Self-balancing re-liquefying system and work method thereof |
| CN107339608A (en) * | 2017-01-23 | 2017-11-10 | 中国海洋石油总公司 | Defeated system outside a kind of liquefied natural gas receiving station |
| CN107366572A (en) * | 2017-08-25 | 2017-11-21 | 成都华气厚普机电设备股份有限公司 | A kind of LNG power supply boats |
-
2014
- 2014-05-04 CN CN201420222996.6U patent/CN203810038U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953848A (en) * | 2014-05-04 | 2014-07-30 | 国鸿液化气机械工程（大连）有限公司 | Self-balancing re-liquefying system and work method thereof |
| CN107339608A (en) * | 2017-01-23 | 2017-11-10 | 中国海洋石油总公司 | Defeated system outside a kind of liquefied natural gas receiving station |
| CN107339608B (en) * | 2017-01-23 | 2023-03-14 | 中国海洋石油集团有限公司 | External transportation system of liquefied natural gas receiving station |
| CN107366572A (en) * | 2017-08-25 | 2017-11-21 | 成都华气厚普机电设备股份有限公司 | A kind of LNG power supply boats |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103953848A (en) | Self-balancing re-liquefying system and work method thereof | |
| CN104265512A (en) | High-pressure/low-pressure gas supply system of ship power plant | |
| CN105324302B (en) | Ship and boil-off gas processing system and method for ship | |
| CN203162531U (en) | High-pressure gas supply system of marine power plant | |
| US9739420B2 (en) | Liquefied gas treatment system for vessel | |
| CN110905693B (en) | High-pressure gas supply system capable of efficiently utilizing cold energy of LNG (liquefied natural gas) fuel | |
| CN204060975U (en) | A kind of high voltage/low voltage fuel gas supply system of Ship Power Equipment | |
| CN105683039A (en) | Fuel gas supply system for liquid gas transportation vessel | |
| CN105863888A (en) | Fuel gas supply system for an internal combustion engine | |
| CN110748439B (en) | Low-pressure gas supply system capable of efficiently utilizing cold energy of LNG (liquefied natural gas) fuel | |
| CN203810038U (en) | Self-balancing re-liquefying system | |
| KR20210011490A (en) | A LNG Carrier | |
| CN205090187U (en) | Marine LNG fuel gas supply system | |
| CN104197635B (en) | A kind of LNG fuels and energies ship harbour stops re-liquefied system and liquifying method | |
| CN204099891U (en) | A kind of LNG low-temperature storage tank | |
| KR101441244B1 (en) | A Treatment System of Liquefied Natural Gas | |
| CN108367800A (en) | Steamer including engine | |
| CN108137145A (en) | It is that the purpose at least supplying engine is used for the method and apparatus for handling boil-off gas | |
| CN104165103B (en) | An internal combustion engine, and a method of supplying such engine with gaseous fuel | |
| CN209196537U (en) | A kind of re-liquefied fuel dispensing system of small-sized LNG fuel ship BOG | |
| CN103615659A (en) | Gasification and self-supercharging device for LNG (Liquefied Natural Gas) | |
| KR101732554B1 (en) | Fuel gas supplying system in ships | |
| CN103382930B (en) | System utilizing normal temperature compressor to process low temperature gas | |
| KR102053927B1 (en) | A Treatment System of Liquefied Natural Gas | |
| KR102025785B1 (en) | A Treatment System of Liquefied Natural Gas |
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: 20140903 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |