CN221196997U - BOG recycling process system for liquefied natural gas filling wharf - Google Patents
BOG recycling process system for liquefied natural gas filling wharf Download PDFInfo
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- CN221196997U CN221196997U CN202323400391.XU CN202323400391U CN221196997U CN 221196997 U CN221196997 U CN 221196997U CN 202323400391 U CN202323400391 U CN 202323400391U CN 221196997 U CN221196997 U CN 221196997U
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- bog
- lng
- storage tank
- vacuum
- winding heat
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title claims abstract description 34
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 239000003949 liquefied natural gas Substances 0.000 title abstract description 55
- 238000003860 storage Methods 0.000 claims abstract description 56
- 238000004804 winding Methods 0.000 claims abstract description 37
- 238000010926 purge Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 10
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000005431 greenhouse gas Substances 0.000 abstract description 3
- 239000005420 bog Substances 0.000 description 58
- 239000007789 gas Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a BOG recycling process system for a liquefied natural gas filling wharf, which comprises the following steps: the high-vacuum multilayer winding heat-insulating storage tank is used for collecting BOG generated in the whole operation process and performing preliminary liquefaction; the high-lift double-layer pump well is positioned inside the high-vacuum multi-layer winding heat-insulating storage tank; a vacuum tube unit connected with the high vacuum multilayer winding heat insulation storage tank and the filling hose; the BOG liquefaction unit is connected with the high-vacuum multilayer winding heat-insulating storage tank and is used for BOG liquefaction or reliquefaction to generate supercooled LNG, so that the average temperature of the LNG in the tank can be reduced; and the NG purging unit is connected with the filling hose and is used for purging LNG which does not enter the storage tank of the filled ship in the filling hose. The utility model can reduce the cooling cost, reduce the emission of greenhouse gases and has great economic and social benefits.
Description
Technical Field
The utility model relates to the technical field of liquefied natural gas fuel filling for ships, in particular to a BOG recycling process system for a liquefied natural gas filling wharf.
Background
Liquefied Natural Gas (LNG) is clean energy, is one of main energy sources for replacing coal and petroleum, is a bridge for transition from fossil energy sources to non-fossil energy sources, and is an effective measure for realizing energy conservation, emission reduction, transformation upgrading and energy utilization structure optimization in the water transportation industry.
LNG storage tank pipeline and equipment need carry out LNG cooling before putting into use, because BOG recovery plant and construction period limit, the BOG that the precooling process produced rapidly can't be retrieved or all retrieve mostly, can produce huge waste, also bring certain influence simultaneously for the environment, and the precooling mode of LNG storage tank and BOG are retrieved and are a system engineering, should coordinate the arrangement, coordinate the progress of each engineering detail, make it can "each at its own job" during the debugging, fully play a role. Therefore, the BOG recycling process system for filling the liquefied natural gas fuel is researched, meets the requirements of all parties, can reduce the cooling cost and the emission of greenhouse gases, and has huge economic and social benefits.
Disclosure of utility model
Aiming at the problems, the utility model provides a BOG recycling process system for a liquefied natural gas filling wharf.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
A lng refueling terminal BOG recycling process system, the system comprising:
the high-vacuum multi-layer winding heat-insulating storage tank is used for collecting BOG generated in the whole operation process, primary liquefaction is carried out, LNG in the high-vacuum multi-layer winding heat-insulating storage tank is heated, vaporization is aggravated, pressure is increased, and BOG in the high-vacuum multi-layer winding heat-insulating storage tank is conveyed to the BOG liquefaction unit at the moment;
The high-lift double-layer pump well is positioned in the high-vacuum multi-layer winding heat-insulating storage tank, and the high-vacuum multi-layer winding heat-insulating storage tank provides cryogenic temperature for the high-lift double-layer pump well, so that LNG in the high-lift double-layer pump well cannot be gasified and deteriorated;
The vacuum tube unit is connected with the high-vacuum multilayer winding heat-insulating storage tank and the filling hose and is used for conveying LNG to the wharf through the high-vacuum multilayer winding heat-insulating storage tank;
The BOG liquefaction unit is connected with the high-vacuum multilayer winding heat-insulating storage tank and is used for BOG liquefaction or reliquefaction to generate supercooled LNG, so that the average temperature of the LNG in the tank can be reduced;
And the NG purging unit is connected with the filling hose and is used for purging LNG which does not enter the storage tank of the filled ship in the filling hose.
As the utility model, the utility model has the further technical proposal, and also comprises a ship filling pry group which is connected with the vacuum tube unit.
As the utility model discloses carry out further technical scheme, still include LNG measuring pump sled, it is in boats and ships filling sled group with between the filling hose.
As the utility model discloses carry out further technical scheme, still include the diffusion tower, the diffusion tower with connect through the pipeline that emptys between the system, the pipeline that emptys with be connected with the flare between the diffusion tower.
As the utility model discloses carry out further technical scheme, still include voltage regulator, flowmeter, odorizing, control valve and instrumentation, through voltage regulator, flowmeter, odorizing, control valve and instrumentation will retrieve BOG pressure regulating, measurement, the back of odorizing export to the gas unit, in this embodiment, voltage regulator, flowmeter, odorizing, control valve and instrumentation are not shown in the figure.
Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a BOG recycling process system for a liquefied natural gas filling wharf, which can reduce cooling cost and greenhouse gas emission and has huge economic and social benefits. According to the utility model, BOG generated in the whole operation process is collected to the storage tank of the station through the process system to carry out preliminary liquefaction, so that the purpose of BOG peak regulation is realized. The LNG in the storage tank is heated, vaporization is aggravated, the pressure is increased, the BOG in the storage tank is conveyed to the BOG compression liquefaction device for liquefaction treatment, the purpose of depressurization of the storage tank is achieved, and meanwhile newly-generated supercooled LNG returns to the storage tank, so that the average temperature of the LNG in the storage tank is further reduced. Finally, the economic, efficient and environment-friendly recovery treatment effect on BOG generated in the operation process is realized, and the liquid source of the storage tank can be maintained in a low-temperature state for a long time.
Drawings
Fig. 1 is a schematic structural diagram of a BOG recycling process system for lng fueling terminals.
Reference numerals annotate: 1-high vacuum multilayer winding heat insulation storage tank, 2-high lift double-layer pump well, 3-vacuum tube unit, 4-BOG liquefaction unit, 5-NG purging unit, 6-filling hose, 7-filling ship storage tank, 8-ship filling skid group and 9-LNG metering pump skid.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
As shown in fig. 1, as an embodiment of the present utility model, a lng-filling terminal BOG recycling process system, the system comprising:
The high-vacuum multi-layer winding heat-insulating storage tank 1 is used for collecting BOG generated in the whole operation process, performing preliminary liquefaction, heating LNG in the high-vacuum multi-layer winding heat-insulating storage tank 1, increasing gasification and pressure, and conveying the BOG in the high-vacuum multi-layer winding heat-insulating storage tank 1 to the BOG liquefaction unit 4 at the moment;
The high-lift double-layer pump well 2 is positioned inside the high-vacuum multi-layer winding heat-insulating storage tank 1, and the high-vacuum multi-layer winding heat-insulating storage tank 1 provides cryogenic temperature for the high-lift double-layer pump well 2, so that LNG in the high-lift double-layer pump well 2 cannot be gasified and deteriorated;
A vacuum tube unit 3 connected to the high-vacuum multi-layer wound heat-insulating tank 1 and the filling hose 6, the vacuum tube unit 3 being used for the high-vacuum multi-layer wound heat-insulating tank 1 to deliver LNG to the quay;
The BOG liquefaction unit 4 is connected with the high-vacuum multilayer winding heat-insulating storage tank 1, and the BOG liquefaction unit 4 is used for liquefying or reliquefying BOG to generate supercooled LNG, so that the average temperature of the LNG in the tank can be reduced;
And an NG purge unit 5 connected to the filling hose 6, the NG purge unit 5 being configured to purge LNG within the filling hose 6 that does not enter the tank 7 of the ship under injection.
In this embodiment, a ship filling skid 8 is also included, which is connected to the vacuum tube unit 3.
In this embodiment, an LNG metering pump skid 9 is also included, which is located between the ship filling skid 8 and the filling hose 6.
In this embodiment, still include the blow-off tower, the blow-off tower with connect through the blow-off pipeline between the system, the blow-off pipeline with be connected with the blow-off torch between the blow-off tower. Wherein the bleed tower, vent conduit and vent flare are not shown in the figures.
In this embodiment, the system further includes a pressure regulator, a flow meter, an odorizing valve, a control valve and a detecting instrument, and the recovered BOG is regulated, metered and odorized by the pressure regulator, the flow meter, the odorizing valve, the control valve and the detecting instrument and then is externally output to the gas using unit.
The specific implementation mode of the BOG recycling process system of the liquefied natural gas filling wharf is that BOGs generated in the whole operation process are collected to the high-vacuum multilayer winding heat-insulating storage tank 1 of a station through the process system, preliminary liquefaction is carried out, LNG in the high-vacuum multilayer winding heat-insulating storage tank 1 is heated, gasification is aggravated, pressure is increased, BOGs in the high-vacuum multilayer winding heat-insulating storage tank 1 are conveyed to the BOG liquefaction unit 4 at the moment, re-liquefaction treatment is carried out through the compression liquefaction device, and the purpose of reducing pressure of the high-vacuum multilayer winding heat-insulating storage tank 1 is achieved. After the BOG is treated by the reliquefaction device, the generated supercooled LNG enters the high-vacuum multilayer winding heat insulation storage tank 1, so that the average temperature of the LNG in the tank can be reduced. According to the saturation curve data of LNG, can set up the air inlet pressure in a flexible way, make the reliquefaction device work continuously, continuously import cold energy to reach the purpose that reduces the high vacuum multilayer winding heat insulation storage tank 1 liquid temperature.
In the whole cooling process of the high-vacuum multi-layer winding heat-insulating storage tank 1 and the pipeline, the pressure of the high-vacuum multi-layer winding heat-insulating storage tank 1 must be controlled within the designed operating pressure range of the storage tank, namely, the whole treatment of BOG gas generated in the cooling process is required, so that the BOG can be recovered to the maximum extent by reasonably controlling the cooling rate and starting BOG recovery processes in different modes. For the BOG recovery rate problem under different working conditions, the BOG of the common LNG receiving station adopts a pressurizing recondensing mode, and the BOG cannot be completely recovered due to the limitation of downstream output flow and the discharge of a great amount of BOG in the cooling process, so that the BOG is basically treated by adopting an auxiliary emptying torch mode for the safety of a storage tank, great waste is caused, and simultaneously, the generated carbon dioxide can also assist the greenhouse effect.
The supercooled LNG that BOG reliquefaction generated is retrieved to high vacuum multilayer winding heat-insulating storage tank 1, and high lift double-deck pump well 2 is located the storage tank inside, and high vacuum multilayer winding heat-insulating storage tank 1 provides cryogenic temperature for high lift double-deck pump well 2 for LNG in the high lift double-deck pump well 2 can not gasify and go bad, and high lift double-deck pump well 2 need not to set up alone and keeps homothermal device, energy saving and cost. LNG in the high-vacuum multilayer winding heat-insulating storage tank 1 is conveyed to a wharf through a vacuum tube unit 3 after being pressurized by a ship filling skid group 8, LNG fuel is filled into a ship through a filling hose 6, LNG metering is carried out through an LNG metering pump skid 9 in the filling process, and the LNG metering pump skid 9 is arranged between the ship filling skid group 8 and a pipeline of a storage tank 7 of a filled ship. After the filling operation is completed, residual LNG exists between the rear end of the LNG metering pump skid 9 and the filled ship, and the residual LNG mainly exists in the filling hose 6 but does not enter the filled ship storage tank 7, so that after the filling operation is completed, the filling hose 6 is purged by adopting the NG purging unit 5 before disconnection. In the BOG recycling process, when production equipment is subjected to overpressure, overhauling or faults, an emptying mechanism is started, natural gas in the production equipment is completely emptied in a short time, and the emptied natural gas is collected and conveyed to an emptying torch through an emptying pipeline to be subjected to combustion treatment and is discharged through an emptying tower. Finally, the economic, efficient and environment-friendly recycling effect on BOG generated in the operation process is realized.
Compared with BOG, the BOG reliquefaction scheme can adapt to the fluctuation of BOG production and reduce the tripping frequency of the safety valve. Meanwhile, the operation effect of recovering BOG of the injected ship and selling the BOG for the second time after liquefying the BOG can be achieved. In addition, after newly generated supercooled LNG enters the storage tank, the station liquid source can be further cooled, so that the temperature of the station liquid source is maintained at a lower level, and the sales of the LNG is facilitated.
Therefore, in the process of debugging the receiving station, if the cooling mode and the cooling progress can be reasonably arranged according to the construction and debugging progress, time trial and time trial of the receiving station and the gas transmission trunk line, the generation rate of the BOG is controlled, the BOG is recovered to the greatest extent possible by adopting a reasonable recovery mode, and the debugging cost can be effectively reduced. So this patent proposes to adopt the combination treatment scheme of high vacuum multilayer winding thermal-insulated storage tank 1+ big lift double-deck pump well 2+ vacuum tube unit 3+ BOG liquefaction unit 4+ ng purge unit 5+ diffusing tower, this kind of liquefied natural gas filling pier BOG recycle process equipment is used for the BOG to handle, exports to the gas unit after adjusting pressure, measuring, the odorizing with the BOG in the buffer tank. The equipment comprises equipment such as a pressure regulator, a flowmeter, an odorizing valve, a control valve, a detection instrument and the like.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (5)
1. A lng refueling terminal BOG recycling process system, the system comprising:
The high-vacuum multilayer winding heat-insulating storage tank is used for collecting BOG generated in the whole operation process and performing preliminary liquefaction;
The high-lift double-layer pump well is positioned in the high-vacuum multi-layer winding heat-insulating storage tank, and the high-vacuum multi-layer winding heat-insulating storage tank provides cryogenic temperature for the high-lift double-layer pump well, so that LNG in the high-lift double-layer pump well cannot be gasified and deteriorated;
The vacuum tube unit is connected with the high-vacuum multilayer winding heat-insulating storage tank and the filling hose and is used for conveying LNG to the wharf through the high-vacuum multilayer winding heat-insulating storage tank;
The BOG liquefaction unit is connected with the high-vacuum multilayer winding heat-insulating storage tank and is used for BOG liquefaction or reliquefaction to generate supercooled LNG, so that the average temperature of the LNG in the tank can be reduced;
And the NG purging unit is connected with the filling hose and is used for purging LNG which does not enter the storage tank of the filled ship in the filling hose.
2. The lng refueling dock BOG recycling process system of claim 1, further comprising a ship filling skid connected to the vacuum tube unit.
3. The LNG refueling terminal BOG recycling process system of claim 2, further comprising an LNG metering pump skid positioned between the ship filling skid and the filling hose.
4. The lng refueling dock BOG recycling process system of claim 1, further comprising a purge tower, wherein the purge tower is connected to the system via a purge line, and a purge flare is connected between the purge line and the purge tower.
5. The lng refueling dock BOG recycling process system according to claim 2, further comprising a pressure regulator, a flow meter, a odorizing valve, a control valve and a detecting instrument, wherein the recovered BOG is regulated, metered and odorized by the pressure regulator, the flow meter, the odorizing valve and the detecting instrument and then is externally conveyed to the gas using unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323400391.XU CN221196997U (en) | 2023-12-13 | 2023-12-13 | BOG recycling process system for liquefied natural gas filling wharf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323400391.XU CN221196997U (en) | 2023-12-13 | 2023-12-13 | BOG recycling process system for liquefied natural gas filling wharf |
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| Publication Number | Publication Date |
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| CN221196997U true CN221196997U (en) | 2024-06-21 |
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| CN202323400391.XU Active CN221196997U (en) | 2023-12-13 | 2023-12-13 | BOG recycling process system for liquefied natural gas filling wharf |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120101025A (en) * | 2025-05-09 | 2025-06-06 | 中太能源科技(上海)有限公司 | A BOG dynamic balance treatment system for offshore vessels and land liquid cargo membrane tanks |
| CN121201355A (en) * | 2025-11-26 | 2025-12-26 | 大连船舶海洋工程有限公司 | CO utilizing supercooled liquid2Realization of CO2Method for precooling cargo hold |
| CN121201355B (en) * | 2025-11-26 | 2026-01-30 | 大连船舶海洋工程有限公司 | CO utilizing supercooled liquid2Realization of CO2Method for precooling cargo hold |
-
2023
- 2023-12-13 CN CN202323400391.XU patent/CN221196997U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120101025A (en) * | 2025-05-09 | 2025-06-06 | 中太能源科技(上海)有限公司 | A BOG dynamic balance treatment system for offshore vessels and land liquid cargo membrane tanks |
| CN121201355A (en) * | 2025-11-26 | 2025-12-26 | 大连船舶海洋工程有限公司 | CO utilizing supercooled liquid2Realization of CO2Method for precooling cargo hold |
| CN121201355B (en) * | 2025-11-26 | 2026-01-30 | 大连船舶海洋工程有限公司 | CO utilizing supercooled liquid2Realization of CO2Method for precooling cargo hold |
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