CN106641701B - A kind of hydrate BOG retracting devices - Google Patents
A kind of hydrate BOG retracting devices Download PDFInfo
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- CN106641701B CN106641701B CN201611117323.4A CN201611117323A CN106641701B CN 106641701 B CN106641701 B CN 106641701B CN 201611117323 A CN201611117323 A CN 201611117323A CN 106641701 B CN106641701 B CN 106641701B
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- reactor
- hydrate
- water
- gas
- bog
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- 239000007789 gas Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 230000003446 memory effect Effects 0.000 claims abstract description 4
- 238000005057 refrigeration Methods 0.000 claims description 13
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 230000036571 hydration Effects 0.000 claims 1
- 238000006703 hydration reaction Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 239000003345 natural gas Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000032258 transport Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000004677 hydrates Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
-
- 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of hydrate BOG retracting devices, Application of Hydrate technical field.BOG gases are entered by gas handling system in reactor, and form micro-bubble by disperser is combined generation hydrate to swim on liquid level in reactor with water.And fluid level control system is to provide enough cold water in reactor liquid level is kept to be maintained at appropriate height.Promote decomposition of hydrate to deflate to carrying out changing water heating in reactor by cold rinse bank and room temperature sink when use, decompose gas and use is discharged by outlet system.Fluid level control system solves the problems, such as that the water surface declines caused Hydrate Plugging air inlet in reactor；Cold rinse bank recycles the liquid in reactor, recycles, and accelerates the generation of hydrate while saving cold energy using the memory effect of hydrate, improves economy；Room temperature sink carries out reactor to change water, changes the temperature in reactor to control the decomposition of hydrate in reactor.Cooling system according to circumstances utilizes the waste cold of LNG, improves energy efficiency.
Description
Technical field
The invention belongs to Application of Hydrate technical fields, are related to a kind of hydrate BOG retracting devices.
Background technology
Increasingly serious with environmental problem, seriously polluted fossil energy is gradually replaced by more clean natural gas
Generation.Especially exist《It reaches an agreement in Paris》After signature, under the main trend of the world and the leading of national policy, Natural Gas Demand is rapid
Development；With the continuing to optimize of natural gas exploiting method, the revolutionary progress of shale gas exploitation, the price of natural gas gradually drops
Low, price advantage makes natural gas more be received by the market；The reserves of natural gas are huge simultaneously, and especially China's natural gas reserves are more
It is above petroleum reserves.Therefore, the purposes of natural gas is more and more extensive.
With increasing for natural gas dosage, the shipping storage technology of natural gas is also subject to the people's attention, in addition to pipeline
Other than conveying, with the most ripe of LNG the relevant technologies development.In terms of transport, for pipe natural gas, LNG is more
It is safe, flexible, while being also the only resource of transport by sea.Therefore LNG transports also become the hot issue studied at present.Big
While measuring LNG transports, the problem of BOG, can not also avoid so far.BOG is by the LNG evaporations in low-temperature storage tank and low-temperature tanker
It generates, Daily boil-off-rate is 0.3% or so, and in the case of LNG amount transports, BOG is a very considerable energy.Usual feelings
Under condition, BOG is by blow valve direct emission, and directly emptying not only causes the waste of the energy, but will aggravate greenhouse effects.
Therefore how effective recycling BOG is the current energy problem for being badly in need of solving and environmental problem.
The presence of gas hydrates demonstrate hydrate can effective natural gas-storing, this give the present invention provides
Theoretical foundation.The formation condition ratio LNG of gas hydrates is more easily reachd, therefore hydrate is a kind of relatively inexpensive day
Right gas storage method.
Invention content
The present invention provides a kind of hydrate BOG retracting devices, and one is provided to be based on hydrate BOG recovery technologies
Industrialized device can be achieved in kind, and can be recycled to raw material.
Technical scheme of the present invention：
A kind of hydrate BOG retracting devices, including reactor, cooling system, fluid level control system, cold rinse bank, room temperature
Sink, gas handling system and outlet system；
BOG recycle and reuses carry out in the same reactor, which is made of high pressure resistant stainless steel, are placed in absolutely
In the pressure vessel of heat, it is filled with refrigerating fluid between pressure vessel and reactor, refrigeration is provided by cooling system；Reactor lower part be equipped with into
Gas port, setting filter and disperser at air inlet, disperser are used for disperseing BOG gases, and filter prevents hydrate solids from falling
Entering air inlet causes gas handling system to block；It is provided with gas outlet above reactor side, by the BOG gases being stored in reactor point
Solution, and inject gas pipeline network or caisson；Tetrahydrofuran is added in the reactor and the mixing of lauryl sodium sulfate is molten
Liquid, for promoting hydrate to generate；
Gas handling system is equipped with first gas booster pump, and gas boosting pump is connected with reactor, is equipped with check-valves therebetween
Door；First gas booster pump controls gas pressure within the required range, and BOG gases enter reaction after gas boosting pump pressurization
Device；
Outlet system one end is connected with reactor, is equipped with the first controllable valve between；Outlet system other end root
Gas pipeline network or caisson are connected according to situation, and the BOG of collection discharges at any time to be incorporated to pipe network or realize other utilizations；
Fluid level control system is the water receiver made of high pressure resistant stainless steel, and water receiver is arranged in pressure vessel, water receiver
It is filled with refrigerating fluid between pressure vessel, refrigeration is provided by cooling system；It is connected with reactor side top at the top of water receiver, makes in the two
Portion's pressure is consistent；It is connected with reactor side-lower below water receiver, is equipped with the second controllable valve therebetween, utilizes connection
Device principle keeps reactor liquid level in the reasonable scope, realizes automatic liquid surface control, ensures that water is sufficient in reactor, and will not be because
Hydrate generates and blocks air intake；
Cooling system be reactor, fluid level control system and cold rinse bank refrigeration, according to actual conditions using LNG waste cold or
In addition freezed using refrigeration machine；
Cold rinse bank is made of high pressure resistant stainless steel, and cold rinse bank is arranged in pressure vessel, is filled between water receiver and pressure vessel
Refrigerating fluid provides refrigeration by cooling system；It is connected with reactor bottom at the top of cold rinse bank, passes through third controlled valve in connecting line
Door controls whether to be connected to；Cold water trench bottom is connected with reactor side-lower, and second liquid booster pump is equipped in pipeline, passes through control
Second liquid booster pump processed controls whether to be connected to；Cold rinse bank recycles reactor inner cold water, is saving energy
While, the memory effect for decomposing water also quickly generates conducive to hydrate.
Room temperature sink is made of high pressure resistant stainless steel, and room temperature sink top is connected with reactor bottom, in connecting line
It controls whether to be connected to by the 4th controllable valve；Room temperature bottom of gullet is connected with reactor side-lower, and first is equipped in pipeline
Liquid booster pump controls whether to be connected to, by room temperature sink and cold rinse bank in reactor by controlling the first liquid booster pump
Inflow and outflow of water heating is carried out to promote decomposition of hydrate, safe and energy consumption is low, while the decomposition hydrate that heats up may be implemented to react
From being pressurized in device, reduce the energy consumption using booster pump.
Beneficial effects of the present invention：Hydrate natural gas-storing gas is applied on BOG gases, it can be by hydrate
Method natural gas-storing is widely used in LNG storage transports, simple in structure, and the collection and utilization of BOG is in the same reactor
In, and THF/SDS mixed solutions are added in the reactor, it can solve that gas hydrates formation speed is slow, period length
Disadvantage.In addition, being equipped with fluid level control system, solve asking for Hydrate Plugging air inlet caused by the water surface declines in reactor
Topic；It is respectively arranged below with cold rinse bank and room temperature sink in device simultaneously, cold rinse bank can recycle the liquid in reactor,
It recycles, the generation of hydrate can be accelerated while saving cold energy using the memory effect of hydrate, improve economy；
Room temperature sink carries out reactor to change water, changes the temperature in reactor to promote the decomposition of hydrate in reactor, this method
Safe and energy consumption is low, while decomposition of hydrate can also be realized in reactor from being pressurized, and the energy consumption of booster pump is saved.Cooling system
The waste cold that LNG can according to circumstances be utilized, improves energy efficiency.
Description of the drawings
Fig. 1 is a kind of hydrate BOG retracting device structure diagrams.
Fig. 2 is a kind of hydrate BOG retracting device structural schematic diagrams.
In figure：1 reactor；2 pressure vessels；3 filters and disperser；4 water receivers；
5 refrigeration machines；6-1 gas boostings pump；The first liquid booster pumps of 6-2；6-3 second liquid booster pumps；
7 room temperature sinks；The first controllable valves of 8-1；The second controllable valves of 8-2；8-3 third controllable valves；
The 4th controllable valves of 8-4；9 check valves；10 cold rinse banks.
Specific implementation mode
Describe the specific implementation mode of the present invention in detail below in conjunction with technical solution and attached drawing.
Fig. 1 show a kind of hydrate BOG retracting devices structure diagram operation principle block diagram, and the course of work is：
After placing THF mixing SDS solution in reactor, BOG gases are entered by gas handling system in reactor, are formed by disperser small
Bubble is combined generation hydrate to swim on liquid level in reactor with water.And fluid level control system is to be provided in reactor enough
Cold water keep liquid level be maintained at appropriate height.By cold rinse bank and room temperature sink to carrying out changing water liter in reactor when use
Temperature promotes decomposition of hydrate aerogenesis, decomposes gas and use is discharged by outlet system.
Fig. 2 show a kind of hydrate BOG retracting device schematic diagrames.
(1) course of work is in reactor：After being packed into THF mixing SDS solution first in reactor, it is all to close device
Valve.Refrigerating fluid is filled between reactor and pressure vessel, under cryogenic high pressure, hydrate is easier to generate.Open second
Controllable valve 8-2 makes liquid level and level balance in water receiver in reactor.Air inlet is opened, check valve 9 is opened, passes through gas
BOG is pressurized to appropriate pressure and is injected into reactor by body booster pump 6-1.BOG after supercharged passes through the filter above air inlet
And disperser 3 is diffused in 180 ° in the form of micro-bubble into reactor solution.BOG bubbles are high in accelerating agent and low temperature
Hydrate is generated with hydrone under the action of pressure, since the density of hydrate is less than the density of water, hydrate will float on liquid level,
So as to avoid hydrate the problem of inlet generation causes inlet to block.As BOG gases endlessly enter
In reactor, hydrate is continuously generated, and is reached predetermined amount or is carried out decomposing outlet process when needing.
(2) decomposing outlet process is：All valves in closing system close refrigeration machine 5, open third controllable valve 8-3,
Cold water in reactor is discharged into cold rinse bank 10, when liquid level is slightly above filter and disperser 3, closes third controlled valve
Door 8-3 stops discharge cold water；Start the first liquid booster pump 6-2, the normal-temperature water in room temperature sink 7 is increased by the first liquid
Press pump 6-2 is entered in reactor 1, promotes the decomposition of hydrate by the variation of temperature, reactor is injected into according to normal-temperature water
In water control the temperature in reactor, to control the decomposition of hydrate, can also be by being injected into room temperature in reactor
The amount of water controls the pressure in reactor, realizes from being pressurized.The first liquid is closed when reactor pressure reaches required pressure
Body booster pump 6-2 opens the first controllable valve 8-1, the gas in reactor is drained by outlet system in gas pipeline network
Or other gas storage systems.
(3) circulating water process is：After equal outlets process, all valves are closed.Start second liquid booster pump 6-
3, the cold water in cold rinse bank 10 is injected by second liquid booster pump 6-3 in reactor 1 and is recycled.Open second
Liquid level in water tank 4 is connected to by controllable valve 8-2 with the liquid level in reactor 1.
Claims (1)
1. a kind of hydrate BOG retracting devices, which is characterized in that hydrate BOG retracting devices include reactor, cooling
System, fluid level control system, cold rinse bank, room temperature sink, gas handling system and outlet system；
BOG recycle and reuses carry out in the same reactor, which is made of high pressure resistant stainless steel, are placed in thermal insulation
In pressure vessel, it is filled with refrigerating fluid between pressure vessel and reactor, refrigeration is provided by cooling system；Reactor lower part is equipped with air inlet
Mouthful, setting filter and disperser at air inlet, disperser are used for disperseing BOG gases, and filter prevents hydrate solids from falling into
Air inlet causes gas handling system to block；It is provided with gas outlet above reactor side, by the BOG gases being stored in reactor point
Solution, and inject gas pipeline network or caisson；Tetrahydrofuran is added in the reactor and the mixing of lauryl sodium sulfate is molten
Liquid, for promoting hydrate to generate；
Gas handling system is equipped with first gas booster pump, and gas boosting pump is connected with reactor, is equipped with check valve therebetween；The
Within the required range by gas pressure control, BOG gases enter reactor to one gas boosting pump after gas boosting pump pressurization；
Outlet system one end is connected with reactor, is equipped with the first controllable valve between；The outlet system other end is according to feelings
Condition connects gas pipeline network or caisson, and the BOG of collection discharges at any time to be incorporated to pipe network or realize other utilizations；
Fluid level control system is the water receiver made of high pressure resistant stainless steel, and water receiver is arranged in pressure vessel, water receiver and pressure
It is filled with refrigerating fluid between power shell, refrigeration is provided by cooling system；It is connected with reactor side top at the top of water receiver, makes pressure inside the two
Power is consistent；It is connected with reactor side-lower below water receiver, is equipped with the second controllable valve therebetween, utilizes linker original
Reason keeps reactor liquid level in the reasonable scope, realizes automatic liquid surface control, ensures that water is sufficient in reactor, and will not be because of hydration
Object generates and blocks air intake；
Cooling system is reactor, fluid level control system and cold rinse bank refrigeration, according to actual conditions using the waste cold or in addition of LNG
Freezed using refrigeration machine；
Cold rinse bank is made of high pressure resistant stainless steel, and cold rinse bank setting is filled with refrigeration in pressure vessel, between water receiver and pressure vessel
Liquid provides refrigeration by cooling system；It is connected with reactor bottom at the top of cold rinse bank, is gated by third controlled valve in connecting line
Whether system is connected to；Cold water trench bottom is connected with reactor side-lower, and second liquid booster pump is equipped in pipeline, passes through control the
Two liquid booster pumps control whether to be connected to；Cold rinse bank recycles reactor inner cold water, is saving the same of energy
When, the memory effect for decomposing water also quickly generates conducive to hydrate；
Room temperature sink is made of high pressure resistant stainless steel, and room temperature sink top is connected with reactor bottom, passes through in connecting line
4th controllable valve controls whether to be connected to；Room temperature bottom of gullet is connected with reactor side-lower, and the first liquid is equipped in pipeline
Booster pump controls whether to be connected to, by room temperature sink and cold rinse bank to carrying out in reactor by controlling the first liquid booster pump
Inflow and outflow of water heats up to promote decomposition of hydrate, while the decomposition hydrate that heats up may be implemented in reactor from supercharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117323.4A CN106641701B (en) | 2016-12-07 | 2016-12-07 | A kind of hydrate BOG retracting devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117323.4A CN106641701B (en) | 2016-12-07 | 2016-12-07 | A kind of hydrate BOG retracting devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106641701A CN106641701A (en) | 2017-05-10 |
| CN106641701B true CN106641701B (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611117323.4A Active CN106641701B (en) | 2016-12-07 | 2016-12-07 | A kind of hydrate BOG retracting devices |
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| CN110529742B (en) * | 2019-09-27 | 2020-11-24 | 昆明理工大学 | LNG automobile-mounted heat-insulation gas cylinder evaporation gas recycling system |
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|---|---|---|---|---|
| US6644039B2 (en) * | 2000-12-21 | 2003-11-11 | Corken, Inc. | Delivery system for liquefied gas with maintained delivery tank pressure |
| JP2008275127A (en) * | 2007-05-07 | 2008-11-13 | Kagla Vaportech Corp | Liquefied gas transferring and filling device |
| CN201964142U (en) * | 2011-01-24 | 2011-09-07 | 成都深冷科技有限公司 | LNG (liquefied natural gas) pump-free aeration equipment with function of BOG (boil off gas) recovery |
| CN205014028U (en) * | 2015-10-15 | 2016-02-03 | 晋城华港燃气有限公司 | System is utilized to high efficiency of LNG storage tank BOG cold energy |
| CN205209070U (en) * | 2015-12-21 | 2016-05-04 | 刘印同 | Low boiling gas liquefaction and low temperature container BOG retrieve device with pressure boost |
| CN205279602U (en) * | 2015-12-02 | 2016-06-01 | 重庆耐德能源装备集成有限公司 | BOG recovery system |
-
2016
- 2016-12-07 CN CN201611117323.4A patent/CN106641701B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6644039B2 (en) * | 2000-12-21 | 2003-11-11 | Corken, Inc. | Delivery system for liquefied gas with maintained delivery tank pressure |
| JP2008275127A (en) * | 2007-05-07 | 2008-11-13 | Kagla Vaportech Corp | Liquefied gas transferring and filling device |
| CN201964142U (en) * | 2011-01-24 | 2011-09-07 | 成都深冷科技有限公司 | LNG (liquefied natural gas) pump-free aeration equipment with function of BOG (boil off gas) recovery |
| CN205014028U (en) * | 2015-10-15 | 2016-02-03 | 晋城华港燃气有限公司 | System is utilized to high efficiency of LNG storage tank BOG cold energy |
| CN205279602U (en) * | 2015-12-02 | 2016-06-01 | 重庆耐德能源装备集成有限公司 | BOG recovery system |
| CN205209070U (en) * | 2015-12-21 | 2016-05-04 | 刘印同 | Low boiling gas liquefaction and low temperature container BOG retrieve device with pressure boost |
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| Publication number | Publication date |
|---|---|
| CN106641701A (en) | 2017-05-10 |
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