WO2022189619A1 - Verfahren und vorrichtung zur rückverflüssigung von bog - Google Patents
Verfahren und vorrichtung zur rückverflüssigung von bog Download PDFInfo
- Publication number
- WO2022189619A1 WO2022189619A1 PCT/EP2022/056317 EP2022056317W WO2022189619A1 WO 2022189619 A1 WO2022189619 A1 WO 2022189619A1 EP 2022056317 W EP2022056317 W EP 2022056317W WO 2022189619 A1 WO2022189619 A1 WO 2022189619A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- coolant
- bog
- flow
- pressure
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 177
- 239000007788 liquid Substances 0.000 claims abstract description 87
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000007906 compression Methods 0.000 claims abstract description 38
- 230000006835 compression Effects 0.000 claims abstract description 37
- 239000002826 coolant Substances 0.000 claims description 107
- 239000012071 phase Substances 0.000 claims description 20
- 239000007791 liquid phase Substances 0.000 claims description 17
- 239000013535 sea water Substances 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 6
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 2
- 239000003990 capacitor Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 47
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 27
- 230000005494 condensation Effects 0.000 description 11
- 238000009833 condensation Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 239000001294 propane Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 244000069218 Heracleum sphondylium ssp montanum Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000013022 venting 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
- F17C9/04—Recovery of thermal energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
- B63J2/14—Heating; Cooling of liquid-freight-carrying tanks
-
- 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
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0326—Valves electrically actuated
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, e.g. LPG, GPL
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/01—Intermediate tanks
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0408—Level of content in the vessel
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/061—Level of content in the vessel
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/05—Improving chemical properties
- F17C2260/056—Improving fluid characteristics
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/033—Treating the boil-off by recovery with cooling
- F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/037—Treating the boil-off by recovery with pressurising
-
- 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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
Definitions
- the invention relates to a process for the reliquefaction of BOG (Boil Off Gas), the (particularly) volatile components such. B. ethane, and to a device for carrying out the method.
- BOG is vaporized liquefied gas. Liquid gases and thus BOG are usually mixtures of substances with components whose evaporation temperatures usually differ from one another.
- BOG is caused by the unavoidable heat input into the liquid gas tanks (hereinafter also referred to as tanks for short), in which liquid gas is either stored on the mainland or e.g. B. is transported on ships or carried as fuel for own consumption, and / or in the pipelines in which LPG flows. Lately, an increased proportion of volatile components has been found more and more often in liquid gas.
- LPG tank loads e.g. commercial propane
- ethane content ranging from 5% moles in the tank liquid up to 8% moles in the tank liquid
- the long-established reliquefaction processes in transport are no longer able to condense the increased proportion of volatile components. So-called non-condensable fractions are formed.
- Venting to atmosphere for the first period of operation is an effective remedial measure when the amount of non-condensables is low (e.g. residual nitrogen from tank purge). It cannot be used when the non-condensable component is a regular part of the cargo and thus the amount of gas to be vented would become too large.
- Residual gas condensers are heat exchangers that are charged with the non-condensable gas fraction from the condenser via an automatically or manually operated vent valve on the condenser.
- This heat exchanger cools the gas mixture, which is almost below the final pressure of the compressor, to a temperature level close to the saturation temperature of the tank.
- the BOG concentration of ethane for a 5% ethane load at fully cooled tank condition (1 bar a) is about 26%. At 36 °C, this mixture can easily be handled by a 2-stage compressor with a maximum delivery pressure of 21 bar a.
- the object of the present invention is to propose a method and a device with which BOG, which has a higher proportion of volatile components, can also be reliquefied and which are economical. According to the invention, this object is achieved by a method according to claim 1 and a device according to claim 11.
- BOG which has a high content of volatile components
- the invention is based on the knowledge that the liquid phase fraction in a partially condensed fluid can be increased in a simple manner if a liquid receiving container for receiving the partially condensed fluid is a target liquid level and for the final pressure a maximum final pressure, i.e. a limit final pressure, is specified and the exit of the fluid from a cooling device which is connected downstream of the fluid receptacle and in which the fluid is cooled at a temperature specified as a function of the final pressure, exclusively depending on whether the target liquid level is reached or exceeded or is released by reaching the limit final pressure.
- a maximum final pressure i.e. a limit final pressure
- the actuator is opened again, even if the target liquid level in the Fluid receiving container has not yet been reached again, and due to the complete or at least extensive condensation, a completely or largely liquid flow of fluid emerges from the cooling device.
- the volatile fraction in the BOG drops again, the gas phase fraction in the partially condensed fluid also decreases and the liquid level in the fluid receiver continues to rise and the final compression pressure falls again.
- the actuator is closed and remains closed until the liquid level again reaches the desired liquid level. In this way it is prevented that fluid with an appreciable proportion of the gas phase is passed on from the cooling device.
- the actuator is only opened again when the liquid level reaches or exceeds the target liquid level. The opening can take place in a continuous control loop.
- the actuator is preferably a valve.
- the forwarding of the fluid flow cooled in the cooling device can be controlled in a cost-effective manner with a valve.
- the valve can be part of the cooling device and can be arranged directly at its fluid flow outlet.
- the valve can also be arranged in a fluid flow outlet line which is in flow communication with the fluid flow outlet of the heat exchanger. It is also conceivable that the valve is part of a liquid gas tank or a consumer into which the cooled fluid flow is to be introduced.
- the actuator is a volumetric conveyor, such as a turbine, which then z. B. is speed controlled and at "zero" speed stops the flow of chilled fluid, d. H. stops.
- the cooling takes place by means of a coolant circuit in which a
- Coolant flows through a heat exchanger, the fluid stream from step i) being introduced into the heat exchanger and the cooled fluid stream being discharged from the heat exchanger. In this way, the fluid flow can be cooled in a cost-effective manner.
- a liquid coolant advantageously flows through the heat exchanger and the coolant is stored in a coolant reservoir, the coolant being in its liquid phase in the lower region of the coolant reservoir and in its liquid phase in the upper region gas phase.
- a liquid coolant ensures good heat transfer, and a coolant reservoir ensures that the heat exchanger always has an adequate supply of coolant.
- the coolant reservoir can be structurally separate from the heat exchanger, which means that a high degree of flexibility is achieved in the spatial arrangement and maintenance and repair work is facilitated.
- the method has the features of claim 6 and the device has the features of claim 17.
- the BOG is compressed in a two-stage process, and reliquefied BOG is used as the coolant.
- the gaseous fluid entering the heat exchanger from the fluid receiving container is under a particularly high pressure and the pressure drop and thus the temperature drop for the re-liquefied BOG entering the coolant circuit is also high particularly large, so that the gaseous BOG will condense completely or at least almost completely in the heat exchanger.
- the cooling device for cooling the fluid flow emerging from the fluid receiving container is preferably a thermosiphon cooling system.
- the technical effort for cooling is kept relatively low.
- the finally compressed BOG stream is preferably condensed in the condenser using sea water, since this is particularly cost-effective.
- FIG. 1 shows a flow diagram of a first embodiment of one according to the invention
- the exemplary embodiments of the devices 1 according to the invention shown in the figures have a compressor 2, a condenser 3, a fluid receptacle 4, a cooling device 5 and an actuator 6, which is designed as a valve and is arranged in a fluid flow outlet line 7.
- the compressor 2 has an inlet 8 for a BOG flow 9 .
- This inlet 8 can, for example, be in flow connection with the gas phase area of a liquid gas tank.
- the BOG stream 9 is compressed to a final pressure in the compressor 2 in its final compression stage 10 .
- the final pressure depends on the composition of the mixture of substances that makes up BOG flow 9 and increases with the proportion of volatile components in the mixture of substances or in BOG flow 9.
- a two-stage or multi-stage compressor 2 is shown in the exemplary embodiment illustrated in FIG. In this case, the only compression stage is the final compression stage 10.
- the final compression stage 10 has an outlet 11 for the finally compressed BOG flow 9 , which is flow-connected to a BOG flow inlet 12 of the condenser 3
- the final compressed BOG flow 9 is cooled at a temperature that is predetermined independently of the final pressure.
- the condenser 3 can be seawater-cooled.
- the specified limit final pressure is not sufficient to condense all volatile components of the BOG stream with the existing condenser temperature, so that the BOG stream 9 is only partially condensed.
- the BOG flow emerging from the condenser 3 is generally referred to as the fluid flow 9a since it can contain liquid and/or gaseous components.
- the associated outlet is therefore referred to as the fluid flow outlet 14 .
- the fluid flow outlet 14 of the condenser 3 is in flow connection 16 with a fluid flow inlet 15 of the fluid receiving container 4.
- the fluid receptacle 4 has a fluid flow outlet 17 which is above a predetermined fluid receptacle volume 18 of the fluid receptacle 4 and is in flow connection 20 with a fluid flow inlet 19 of the cooling device 5 .
- a target liquid level 23 is at the level of the upper edge of the fluid flow outlet 17 or at a predetermined level distance above it.
- a level sensor 24 for measuring the liquid level is also arranged in the fluid holding tank 4 .
- the measurement signals are sent to a valve control device 6a, with which the valve 6 in the fluid flow outlet line can be brought into an open position or into a closed position downstream of the cooling device.
- the cooling device 5 has the already mentioned fluid flow inlet 19 and a fluid flow outlet 25 which is in flow connection 26 with the fluid flow outlet line 7 .
- the fluid flow 9a is cooled down to a temperature which corresponds to the saturation temperature of the fluid flow 9a at a pressure which is lower than the final pressure.
- the BOG stream 9 referred to as fluid stream 9a from the point of exit from the condenser 3—is under the final pressure.
- This discharge pressure is measured by a pressure sensor 27 placed anywhere in the region extending from the exit of the BOG stream 9 from the final compression stage 10 of the compressor 2 to the valve 6 in the fluid stream discharge line 7 downstream of the cooling device 5 and is under the final pressure.
- this pressure sensor 27 can be arranged in the fluid receptacle 4 .
- the measurement signals are forwarded to a valve control device 6a, with which the valve 6 in the fluid flow outlet line 7 can be brought into an open position or into a closed position, with BOG being reliquefied in an open position being fed to a further use, for example being introduced into a liquid gas tank .
- the actuator or valve position is therefore controlled by means of the measurement signals from both the level sensor 24 and the pressure sensor 27, as follows:
- the actuator or the valve 6 in the fluid flow outlet line 7 is brought into an open position when a) the liquid level corresponds at least to the target liquid level 23 and/or b) the final pressure reaches the limit final pressure.
- the actuator or the valve 6 in the fluid flow outlet line 7 is brought into its closed position when the liquid level drops below the setpoint liquid level 23 and the final pressure is below the final pressure limit. If the proportion of non-condensed BOG increases (e.g. because the proportion of volatile components in the BOG has increased or because the seawater 28 has become warmer in a seawater-cooled condenser 3), the gas phase proportion 22 in the fluid increases (and thus the liquid phase portion 21 from) and the final pressure increases. If the liquid level drops below the target liquid level 23 and then further below the upper edge of the fluid flow outlet opening 17 of the fluid receptacle 4, the boundary between the gas phase 22 and the liquid phase 21 of the fluid is initially in the area of the fluid flow outlet opening 17 of the fluid holding tank 4. In this case, a mixture of gas and liquid exits the fluid holding tank 4 and enters the cooling device 5.
- the proportion of non-condensed BOG increases (e.g. because the proportion of volatile components in the BOG has increased or because the seawater 28 has become warmer in a seawater
- the final pressure increases with an increasing proportion of non-condensed components in the BOG and on the other hand the liquid level in the fluid receptacle 4 rises, so that over time at least one of the two above under A)a) and A)b) reached the states described and the actuator or the valve 6 is opened again.
- FIG. 1 shows an exemplary embodiment of a device 1 according to the invention with an external cooling device 5 .
- the cooling device 5 has a heat exchanger 29 which has an inlet 30 and an outlet 31 for coolant 32 and an inlet 33 and an outlet 34 for the fluid flow 9a and 9b.
- the heat exchanger 29 is part of an external coolant circuit.
- the fluid flow inlet 33 of the heat exchanger 29 is in flow communication 20 with the fluid flow outlet 17 of the fluid receiving vessel 4, and the fluid flow outlet 34 of the heat exchanger 29 is connected to the fluid flow outlet line 7 of the cooling device.
- reliquefied BOG is used as coolant 32 .
- the cooling device 5 has a heat exchanger 29 which has an inlet 30 and an outlet 31 for coolant 32 and an inlet 33 and an outlet 34 for the fluid flow 9a and 9b.
- the heat exchanger 29 is part of a coolant circuit 35.
- the fluid flow inlet 33 of the heat exchanger 29 is in flow connection 20 with the fluid flow outlet 17 of the fluid receiving container 4, and the fluid flow outlet 34 of the heat exchanger 29 is connected to the fluid flow outlet line 7 of the cooling device .
- the fluid receptacle 4 also has a bottom outlet 36, which thus forms a second outlet of the fluid receptacle 4, specifically exclusively for reliquefied BOG, ie exclusively for a liquid flow.
- the bottom outlet 36 is connected to the coolant inlet 38 of a coolant reservoir 39 via a feed line 37 .
- this coolant inlet 38 is arranged in the bottom of the coolant reservoir 39 .
- the coolant 32 i. H. the reliquefied BOG used for this partly evaporates again in the coolant circuit 35 (in particular in the heat exchanger 29), so that the coolant 32 is present in the liquid phase in the lower region 40 of the coolant reservoir 39 and in the gas phase in its upper region 41.
- the coolant reservoir 39 has a coolant outlet 42, which lies above the coolant inlet 30 of the heat exchanger 29 and is in flow connection 43 with it.
- a coolant level sensor 44 is arranged in the coolant reservoir 39 for measuring the fill level 45, d. H. the level, the liquid phase of the coolant 32.
- a feed valve 46 is arranged in the feed line 37 .
- the measurement signals from the coolant level sensor 44 are forwarded to a valve control device 46a, with which the feed valve 46 can be brought into an open position or a closed position, with BOG reliquefied in the open position being fed into the coolant reservoir 39 as coolant 32.
- the fill level 45 of the liquid phase of the coolant 32 in the coolant reservoir 39 is regulated by opening and closing the feed valve 46 such that the coolant outlet 42 of the coolant reservoir 39 is always in the liquid phase area 40 . This ensures that sufficient liquid coolant 32 is always supplied to the heat exchanger 29 .
- the coolant outlet 31 of the heat exchanger 29 is in flow connection 47 with the feed line 37 downstream of the feed valve 46.
- the coolant circuit 35 works like a thermosiphon cooling system.
- the compressor 2 is designed in two stages.
- Compression stage 48 has the inlet 8 for the BOG flow 9 to be compressed and compresses the BOG flow 9 to an intermediate pressure which is lower than the final pressure.
- the second compression stage is the final compression stage 10 and compresses the intermediately compressed BOG flow to the final pressure and has the outlet 11 for the finally compressed BOG flow.
- the gas phase region 41 of the coolant reservoir 39 has an outlet 49 connected to the BOG flow between FIGS. Compression stage 48 and the final compression stage 10 is in flow communication 50. Therefore, on the one hand, evaporated coolant, i. H. gaseous BOG, from the coolant reservoir 39 into the BOG flow between the 1st compression stage 48 and the final compression stage 10 are introduced. On the other hand, at the point of introduction 51 between 1 . Compression stage 10 and the final compression stage 10 also prevail in the coolant reservoir 39 and thus in the entire coolant circuit Iauf 35. The boundary between the final pressure and intermediate pressure in the feed line 37 is the feed valve 46.
- the fluid flow 9a or the finally compressed BOG flow 9 is under the final pressure, i. H. maximum below the specified limit final pressure.
- the fluid stream 9a flowing from the fluid receiving container 4 to the heat exchanger 29 is at the limit final pressure, and the comparatively low temperature level in the coolant circuit 35, the fluid stream 9a is cooled to a temperature close to the saturation temperature of the fluid stream 9a at intermediate pressure. so that the gas phase portion of the fluid flow 9a will condense in this state and through the open valve 6 (at the final limit pressure) in the fluid flow outlet line 7, only or almost exclusively reliquefied BOG is passed on, for example discharged into a tank.
- this valve 6 is closed again until the target liquid level 23 in the fluid receptacle 4 is reached again and the valve 6 is opened again.
- the measures according to the invention for the reliquefaction of BOG are further illustrated below with reference to the exemplary embodiment shown in FIG. 2 with a numerical example.
- the BOG to be reliquefied is discharged from an LPG tank for propane and the condenser 3 is sea water cooled.
- the following liquid and gas compositions as well as pressure and temperature conditions in the individual process steps/device elements are based on flash calculations using NIST (National Institute of Standards and Technology) data: a) in the liquid gas tank from which BOG is taken for reliquefaction Liquid: Propane
- Liquid content (condensate): ethane content approx. 25% mol
- Gas content ethane content approx. 45% mol
- the saturation pressure for the gas fraction on the fluid side is around 10 bar a. Since the final pressure on the fluid side is 21 bar a, the gas content in the fluid is completely liquefied.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020237033349A KR20230154445A (ko) | 2021-03-11 | 2022-03-11 | Bog를 재액화하기 위한 방법 및 장치 |
JP2023555361A JP2024512400A (ja) | 2021-03-11 | 2022-03-11 | Bogを再液化するための方法および装置 |
CN202280020299.XA CN116964372A (zh) | 2021-03-11 | 2022-03-11 | 用于bog的再液化的方法和设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021105999.2A DE102021105999B4 (de) | 2021-03-11 | 2021-03-11 | Verfahren und Vorrichtung zur Rückverflüssigung von BOG |
DE102021105999.2 | 2021-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022189619A1 true WO2022189619A1 (de) | 2022-09-15 |
Family
ID=80978988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/056317 WO2022189619A1 (de) | 2021-03-11 | 2022-03-11 | Verfahren und vorrichtung zur rückverflüssigung von bog |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2024512400A (de) |
KR (1) | KR20230154445A (de) |
CN (1) | CN116964372A (de) |
DE (1) | DE102021105999B4 (de) |
WO (1) | WO2022189619A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012143699A1 (en) | 2011-04-19 | 2012-10-26 | Liquid Gas Equipment Limited | Method of cooling boil off gas and an apparatus therefor |
DE102013101414A1 (de) | 2013-02-13 | 2014-09-11 | Brandenburgische Technische Universität Cottbus-Senftenberg | Vorrichtung zur Herstellung von Agglomeraten |
EP3521155A1 (de) * | 2016-09-29 | 2019-08-07 | Daewoo Shipbuilding & Marine Engineering Co., Ltd. | Vorrichtung und verfahren zur wiederverflüssigung von abdampf eines schiffes |
WO2019234025A1 (en) * | 2018-06-04 | 2019-12-12 | Wärtsilä Gas Solutions Norway AS | Method and system for storage and transport of liquefied petroleum gases |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2246875A (en) | 1939-04-03 | 1941-06-24 | Phillips Petroleum Co | Method and apparatus for loading receptacles with volatile liquids |
US4249387A (en) | 1979-06-27 | 1981-02-10 | Phillips Petroleum Company | Refrigeration of liquefied petroleum gas storage with retention of light ends |
DE102013010414B4 (de) | 2013-06-21 | 2016-05-12 | Tge Marine Gas Engineering Gmbh | Rückverflüssigung von Boil-Off-Gasen |
GB201414893D0 (en) | 2014-08-21 | 2014-10-08 | Liquid Gas Equipment Ltd | Method of cooling boil off gas and apparatus therefor |
KR102265257B1 (ko) | 2016-03-07 | 2021-06-16 | 현대중공업 주식회사 | 증발가스 재액화 시스템 및 선박 |
-
2021
- 2021-03-11 DE DE102021105999.2A patent/DE102021105999B4/de active Active
-
2022
- 2022-03-11 JP JP2023555361A patent/JP2024512400A/ja active Pending
- 2022-03-11 WO PCT/EP2022/056317 patent/WO2022189619A1/de active Application Filing
- 2022-03-11 CN CN202280020299.XA patent/CN116964372A/zh active Pending
- 2022-03-11 KR KR1020237033349A patent/KR20230154445A/ko unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012143699A1 (en) | 2011-04-19 | 2012-10-26 | Liquid Gas Equipment Limited | Method of cooling boil off gas and an apparatus therefor |
US9823014B2 (en) * | 2011-04-19 | 2017-11-21 | Babcock Ip Management (Number One) Limited | Method of cooling boil off gas and an apparatus therefor |
DE102013101414A1 (de) | 2013-02-13 | 2014-09-11 | Brandenburgische Technische Universität Cottbus-Senftenberg | Vorrichtung zur Herstellung von Agglomeraten |
EP3521155A1 (de) * | 2016-09-29 | 2019-08-07 | Daewoo Shipbuilding & Marine Engineering Co., Ltd. | Vorrichtung und verfahren zur wiederverflüssigung von abdampf eines schiffes |
WO2019234025A1 (en) * | 2018-06-04 | 2019-12-12 | Wärtsilä Gas Solutions Norway AS | Method and system for storage and transport of liquefied petroleum gases |
Also Published As
Publication number | Publication date |
---|---|
JP2024512400A (ja) | 2024-03-19 |
DE102021105999A1 (de) | 2022-09-15 |
CN116964372A (zh) | 2023-10-27 |
KR20230154445A (ko) | 2023-11-08 |
DE102021105999B4 (de) | 2022-09-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH703773B1 (de) | Verfahren zum Verflüssigen einer kohlenwasserstoffreichen Einsatzfraktion. | |
EP0874188B1 (de) | Verfahren zum Aufbereiten von tiefgekühltem Flüssiggas | |
DE112019005717T5 (de) | Fluid-bypass-verfahren und -system zur steuerung der temperatur eines nicht-petroleum-kraftstoffs | |
EP4367449A1 (de) | Vorkühlkreis und verfahren zur helium-kälteversorgung | |
DE102017008210B4 (de) | Vorrichtung und Verfahren zum Befüllen eines mobilen Kältemitteltanks mit einem kryogenen Kältemittel | |
EP2057381B1 (de) | Verfahren zur zyklischen kolbenlosen kompression des gasphase tiefkalt verflüssigter gase | |
DE102021105999B4 (de) | Verfahren und Vorrichtung zur Rückverflüssigung von BOG | |
EP1180637A2 (de) | Vorrichtung und Verfahren zur druckgeregelten Versorgung aus einem Flüssiggastank mit einem Wärmetauscher | |
DE102010000946A1 (de) | Tankanlage für das Verflüssigen von Boil-Off Gas nebst Verfahren | |
DE102021001650B4 (de) | Verfahren und Vorrichtung zur Rückverflüssigung von BOG | |
DE1245396C2 (de) | Verfahren zur Zwischenlagerung von Erdgas | |
DE4440405C1 (de) | Verfahren zum Zwischenspeichern eines Kältemittels | |
DE3225300C2 (de) | ||
EP0711967A2 (de) | Verfahren zum Verflüssigen einer unter Druck stehenden kohlenwasserstoffreichen Fraktion | |
EP3450819B1 (de) | Verfahren zum befüllen eines mobilen kältemitteltanks mit einem kryogenen kältemittel | |
WO2006082122A1 (de) | Verfahren und vorrichtung zum befüllen von druckbehältern mit nicht verflüssigten gasen oder gasgemischen | |
EP2906350A2 (de) | Verfahren und vorrichtung zum regasifizieren von tiefkalt verflüssigtem gas | |
EP3913273A1 (de) | Brenngasversorgungssystem und verfahren zum versorgen eines hochdruck-gaseinspritzmotors mit brenngas | |
DE19719376C2 (de) | Verfahren und Vorrichtung zum Anwärmen eines aus einem Speicherbehälter abgezogenen verflüssigten Gases oder Gasgemisches | |
DE102022205134B3 (de) | Druckaufbausystem und Druckaufbauverfahren zum Entnehmen eines Druckgases aus einer Speichervorrichtung zur Aufbewahrung eines Flüssiggases | |
AT512979B1 (de) | Verfahren und Vorrichtung zum Regasifizieren von tiefkalt verflüssigtem Gas | |
WO2022028734A1 (de) | Verfahren und eine vorrichtung zur bereitstellung eines kryogenen gases | |
DE2630010A1 (de) | Speichertankanlage fuer fluessiggas | |
WO2023041401A1 (de) | Vorrichtung und verfahren zum betanken eines fahrzeugtanks mit komprimiertem gasförmigem wasserstoff | |
DE2630009A1 (de) | Tankbehaelteranlage fuer fluessiggas |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22713652 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280020299.X Country of ref document: CN Ref document number: 2023555361 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 20237033349 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22713652 Country of ref document: EP Kind code of ref document: A1 |