KR102355052B1 - Boil-off gas reliquefaction system with integrated vaporizer and heat exchanger - Google Patents

Boil-off gas reliquefaction system with integrated vaporizer and heat exchanger Download PDF

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Publication number
KR102355052B1
KR102355052B1 KR1020210057531A KR20210057531A KR102355052B1 KR 102355052 B1 KR102355052 B1 KR 102355052B1 KR 1020210057531 A KR1020210057531 A KR 1020210057531A KR 20210057531 A KR20210057531 A KR 20210057531A KR 102355052 B1 KR102355052 B1 KR 102355052B1
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KR
South Korea
Prior art keywords
heat exchanger
boil
gas
liquefied fuel
supplied
Prior art date
Application number
KR1020210057531A
Other languages
Korean (ko)
Inventor
정제헌
최금식
김지상
Original Assignee
선보공업주식회사
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Publication date
Application filed by 선보공업주식회사 filed Critical 선보공업주식회사
Priority to KR1020210057531A priority Critical patent/KR102355052B1/en
Application granted granted Critical
Publication of KR102355052B1 publication Critical patent/KR102355052B1/en
Priority to PCT/KR2022/003368 priority patent/WO2022234941A1/en
Priority to CN202220524930.7U priority patent/CN217624059U/en
Priority to JP2022000833U priority patent/JP3237482U/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • 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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0045—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by vaporising a liquid return stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/023—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the combustion as fuels, i.e. integration with the fuel gas system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • 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
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/043—Localisation of the removal point in the 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F17C2225/046—Localisation of the filling point in the liquid
    • F17C2225/047—Localisation of the filling point in the liquid with a dip tube
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0157—Compressors
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • 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
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    • F17C2265/00—Effects achieved by gas storage or gas handling
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    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/05—Regasification
    • 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
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/08—Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a mixture of) hydrocarbons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to a vaporizer and heat exchanger integrated boil-off gas reliquefaction system, which re-liquefies boil-off gas (BOG) generated from liquefied fuel through a plurality of heat exchangers so as to effectively recycle the same. In particular, by integrating the heat exchanger and the vaporizer that heats the liquefied fuel supplied to a main engine, a boil-off gas reliquefaction facility can be more compact. The vaporizer and heat exchanger integrated boil-off gas reliquefaction system includes: a liquefied fuel tank; a BOG compressor; a heat exchanger; a booster pump; and an integrated heat exchanger.

Description

베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템{BOIL-OFF GAS RELIQUEFACTION SYSTEM WITH INTEGRATED VAPORIZER AND HEAT EXCHANGER}Vaporizer and heat exchanger integrated boil-off gas reliquefaction system {BOIL-OFF GAS RELIQUEFACTION SYSTEM WITH INTEGRATED VAPORIZER AND HEAT EXCHANGER}

본 발명은 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템에 관한 것으로서, 보다 구체적으로는, 액화 연료에서 발생되는 증발가스(BOG)를 다수의 열 교환기를 통해 재액화시켜 효과적으로 재활용되도록 하며, 특히 열교환기와 메인 엔진으로 공급되는 액화 연료를 가온하는 베이퍼라이저를 일체형으로 통합함으로써, 증발 가스 재액화 설비를 보다 컴팩트하게 구현할 수 있도록 하는 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템에 관한 것이다.The present invention relates to a vaporizer and heat exchanger integrated boil-off gas reliquefaction system, and more particularly, to re-liquefy boil-off gas (BOG) generated from liquefied fuel through a plurality of heat exchangers to be effectively recycled, and in particular to a heat exchanger and It relates to a vaporizer and heat exchanger-integrated boil-off gas reliquefaction system that enables a more compact implementation of a boil-off gas reliquefaction facility by integrally integrating a vaporizer that heats liquefied fuel supplied to a main engine.

일반적으로, LNG는 기존의 화석연료 대비 SOx, NOx 및 이산화탄소 등의 유해물질 및 온실가스를 저감시킬 수 있는 청정연료로 부상하고 있으며 육상뿐만 아니라 해양, 즉 조선 및 선박 분야에서도 활용처가 매우 넓어지고 있는 추세이다.In general, LNG is emerging as a clean fuel that can reduce harmful substances such as SOx, NOx and carbon dioxide and greenhouse gases compared to conventional fossil fuels, and its application is very wide not only on land but also in the ocean, that is, in shipbuilding and ship fields. is the trend

액화천연가스인 LNG는 일반적으로 상압 및 섭씨 -162도 근처에서 액체상태로 존재하며, 단열시스템을 갖는 저장 탱크에 저장된 후에 개별 수요처에 공급된다. 참고로 선박에서의 주요 수요처는 보일러, 발전기 엔진, 저압(예, Wartsila사의 X-DF 엔진) 및 고압(예, MAN solution사의 MEGI 엔진 등) 엔진 등이며, 이들 수요처에 5 내지 300바의 범위로 공급되며, 육상에서는 주요 수요처로 연결되는 천연가스의 주배관 공급망의 압력이 나라마다 다르나 통상 70 내지 120 bar 범위에서 운영되고 있다.LNG, which is a liquefied natural gas, generally exists in a liquid state at atmospheric pressure and near -162 degrees Celsius, and is stored in a storage tank with an insulated system and then supplied to individual consumers. For reference, the main customers in ships are boilers, generator engines, low-pressure (eg, Wartsila's X-DF engine) and high-pressure (eg, MEGI engine of MAN solution, etc.) engines, etc. It is supplied, and the pressure of the main pipeline supply chain of natural gas connected to the main demand on land varies from country to country, but it is usually operated in the range of 70 to 120 bar.

저장탱크 내부에 저장된 LNG는 단열재 사용을 통해 열유입이 억제되어 있으나 대기온도와 탱크 내부의 온도차이로 인해 불가피하게 열유입이 될 수밖에 없으며, 최근 단열기술의 발달로 선박에 사용되는 멤브레인 탱크의 경우 일일 기준 저장된 LNG의 0.15 vol%가 전후의 증발량을 갖도록 설계할 수 있다. 증발된 증발가스는 BOG 압축기에 의해 압축되며, 탱크에 저장된 LNG는 저압펌프 및 고압펌프를 통해 주배관 공급망의 압력으로 승압된 후, 기화되어 송출된다.The LNG stored inside the storage tank is suppressed from heat inflow through the use of insulating materials, but due to the temperature difference between the air temperature and the tank, it inevitably causes heat inflow. It can be designed so that 0.15 vol% of LNG stored on a daily basis has the amount of evaporation before and after. The evaporated BOG is compressed by the BOG compressor, and the LNG stored in the tank is pressurized to the pressure of the main pipeline supply network through a low-pressure pump and a high-pressure pump, and then vaporized and sent out.

증발가스 재액화장치는 저압펌프로 1차 승압된 LNG가 해당 압력에서 온도 증가가 미미하여 과냉 상태를 유지하는 특성을 이용하는 것이다. 즉, 1차 승압된 LNG와 가압된 BOG를 서로 직접 접촉시킴으로써 승압된 압력에서 LNG의 과냉(Sub-cooled)된 현열(Sensible heat)로 BOG를 냉각/액화하는 장치이다. 이 과정에서 일정량의 BOG는 액화되고, 고압펌프를 통해 2차 승압되어 주엔진에 연료로 공급되거나, LNG 저장 탱크로 회수될 수 있다.The boil-off gas reliquefaction apparatus utilizes the characteristic of maintaining a supercooled state because the temperature increase of the LNG, which is first boosted by a low pressure pump, is insignificant at the corresponding pressure. That is, it is a device for cooling/liquefying BOG with sub-cooled sensible heat of LNG at the pressurized pressure by directly contacting the primary boosted LNG and the pressurized BOG with each other. In this process, a certain amount of BOG is liquefied, and the second pressure is boosted through a high-pressure pump to be supplied as fuel to the main engine, or may be recovered to an LNG storage tank.

일반적으로, 열교환기를 통해 배출되는 액화 연료는 베이퍼라이저(vaporizer)라고 하는 기화기를 통해 메인 엔진에서 필요로 하는 형태로 형태 변환되어 공급된다. 이때, 열교환기의 후단에 별도의 베이퍼라이저를 구비하여야 한다는 점에서 증발 가스 재액화 설비 규모가 그만큼 커지게 되는데, 선박 내에서 증발 가스 재액화 설비를 배치하기 위한 공간은 한정되어 있다는 점에서, 현재 전체적인 설비 규모의 컴팩트화가 요구되고 있는 실정이다.In general, liquefied fuel discharged through a heat exchanger is converted into a form required by a main engine and supplied through a vaporizer called a vaporizer. At this time, the scale of the boil-off gas reliquefaction facility increases that much in that a separate vaporizer must be provided at the rear end of the heat exchanger. There is a demand for compactness of the facility scale.

한국공개특허 제10-2018-0093405호Korean Patent Publication No. 10-2018-0093405

본 발명은 전술한 문제점을 해결하기 위한 것으로, 액화 연료에서 발생되는 증발가스(BOG)를 다수의 열 교환기를 통해 재액화시켜 효과적으로 재활용되도록 하며, 특히 열교환기와 메인 엔진으로 공급되는 액화 연료를 가온하는 베이퍼라이저를 일체형으로 통합함으로써, 증발 가스 재액화 설비를 보다 컴팩트하게 구현할 수 있도록 하는 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템을 제공하고자 한다.The present invention is to solve the above-mentioned problems, and to re-liquefy boil-off gas (BOG) generated from liquefied fuel through a plurality of heat exchangers so as to be effectively recycled, and in particular, to heat the liquefied fuel supplied to the heat exchanger and the main engine. An object of the present invention is to provide a vaporizer and heat exchanger integrated boil-off gas reliquefaction system that enables a more compact implementation of the boil-off gas reliquefaction facility by integrating the vaporizer into an integrated body.

본 발명의 일 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)은 액화 연료 탱크(110), 상기 액화 연료 탱크(110)와 연결되며, 상기 액화 연료 탱크(110) 내 증발가스(BOG)를 압축하여 선박 내 보조 엔진 방향으로 공급하는 증발가스 압축기(120), 상기 액화 연료 탱크(110)와 연결되며, 상기 액화 연료 탱크(110) 내 마련된 인 탱크 펌프(110a)를 통해 공급되는 액화 연료와 일측을 통해 공급되는 증발가스(BOG)를 서로 열교환 시킴으로써, 공급되는 증발가스 내 냉열을 회수하는 열교환기(130), 상기 열교환기(130)를 통해 배출되는 액화 연료를 가압하여 선박 내 메인 엔진 방향으로 공급하는 부스터 펌프(140) 및 상기 부스터 펌프(140)와 메인 엔진 사이에 마련되며, 상기 부스터 펌프(140)를 통해 공급되는 액화 연료와 상기 증발가스 압축기(120)를 통해 공급되는 증발가스를 서로 열교환 시킴으로써 공급되는 증발가스 내 냉열을 회수하고, 동시에 상기 부스터 펌프(140)를 통해 공급되는 액화 연료를 가온하여 기화시키는 통합형 열교환기(150)를 포함하는 것을 특징으로 할 수 있다.The vaporizer and heat exchanger integrated BOG reliquefaction system 100 according to an embodiment of the present invention is connected to a liquefied fuel tank 110 and the liquefied fuel tank 110 , and the boil-off gas in the liquefied fuel tank 110 . BOG compressor 120 for compressing and supplying BOG in the direction of the auxiliary engine in the ship, connected to the liquefied fuel tank 110, and supplied through the in-tank pump 110a provided in the liquefied fuel tank 110 The heat exchanger 130 that recovers the cooling heat in the supplied boil-off gas by exchanging heat between the liquefied fuel and the boil-off gas (BOG) supplied through one side, pressurizing the liquefied fuel discharged through the heat exchanger 130 to pressurize the ship The booster pump 140 is supplied to the main engine and is provided between the booster pump 140 and the main engine, and the liquefied fuel supplied through the booster pump 140 and the boil-off gas compressor 120 are supplied through the booster pump 140 . It may include an integrated heat exchanger 150 that recovers the cooling heat in the BOG supplied by exchanging heat with each other, and at the same time heats and vaporizes the liquefied fuel supplied through the booster pump 140. .

일 실시예에서, 상기 통합형 열교환기(150)는 상기 통합형 열교환기(150)를 관통하는 공급 라인(151) 및 상기 공급 라인(151)을 통과하는 가온 냉매인 글리콜 워터를 공급하는 글리콜 워터 공급부를 포함하는 것을 특징으로 할 수 있다.In one embodiment, the integrated heat exchanger 150 includes a supply line 151 passing through the integrated heat exchanger 150 and a glycol water supply unit for supplying glycol water that is a warming refrigerant passing through the supply line 151 . It may be characterized by including.

일 실시예에서, 상기 글리콜 워터 공급부는 회수되는 글리콜 워터를 재가열하여 기 설정된 가온 온도가 유지되도록 하는 글리콜 워터 가열 장치를 포함하는 것을 특징으로 할 수 있다.In one embodiment, the glycol water supply unit may include a glycol water heating device for reheating the recovered glycol water to maintain a preset heating temperature.

본 발명의 일 측면에 따르면, 액화 연료에서 발생되는 증발가스(BOG)를 다수의 열 교환기를 통해 재액화시켜 효과적으로 재활용되도록 하며, 특히 열교환기와 메인 엔진으로 공급되는 액화 연료를 가온하는 베이퍼라이저를 일체형으로 통합함으로써, 증발 가스 재액화 설비를 보다 컴팩트하게 구현할 수 있는 이점을 가진다.According to one aspect of the present invention, boil-off gas (BOG) generated from liquefied fuel is re-liquefied through a plurality of heat exchangers to be effectively recycled, and in particular, a vaporizer for heating the heat exchanger and the liquefied fuel supplied to the main engine is integrated. By integrating, it has the advantage that the boil-off gas reliquefaction facility can be implemented more compactly.

또한 본 발명의 일 측면에 따르면, 자연적으로 발생되는 증발가스를 이용하는 중소형 액화 연료 추진 선박에서도 운항조건에 구애받지 않고 효과적으로 증발가스를 재액화하여 연료로써 재활용할 수 있도록 하며, 이를 통해 선박의 운항비용 및 벙커링 비용이 절감되도록 하는 이점을 가진다.In addition, according to one aspect of the present invention, even in small and medium-sized liquefied fuel propulsion vessels using naturally occurring BOG, the BOG can be effectively re-liquefied and recycled as fuel regardless of operating conditions, and through this, the operating cost of the vessel and bunkering costs are reduced.

도 1은 본 발명의 일 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.
도 2는 다른 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.
도 3은 또 다른 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.1 is a diagram illustrating the configuration of a vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to an embodiment of the present invention.
2 is a view showing the configuration of the vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to another embodiment.
3 is a diagram illustrating the configuration of a vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to another embodiment.

이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시한다. 그러나 하기의 실시예는 본 발명을 보다 쉽게 이해하기 위하여 제공되는 것일 뿐, 실시예에 의해 본 발명의 내용이 한정되는 것은 아니다.Hereinafter, preferred examples are presented to help the understanding of the present invention. However, the following examples are only provided for easier understanding of the present invention, and the content of the present invention is not limited by the examples.

도 1은 본 발명의 일 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.1 is a diagram illustrating the configuration of a vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to an embodiment of the present invention.

도 1을 살펴보면, 본 발명의 일 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)은 크게 액화 연료 탱크(110), 증발가스 압축기(120), 열교환기(130), 부스터 펌프(140) 및 통합형 열교환기(150)를 포함하여 구성될 수 있다.Referring to FIG. 1 , the vaporizer and heat exchanger integrated BOG reliquefaction system 100 according to an embodiment of the present invention is largely a liquefied fuel tank 110 , a BOG compressor 120 , a heat exchanger 130 , and a booster pump. 140 and may be configured to include an integrated heat exchanger 150 .

먼저, 액화 연료 탱크(110)는 선박의 추진 동력원인 메인 엔진 및 보조 엔진에서 필요로 하는 액화 연료를 저장하는 저장 공간을 의미한다. 이때, 액화 연료라 함은 LNG, 액화 수소와 같이 액화 상태의 모든 연료를 포괄하는 의미로 해석될 수 있다.First, the liquefied fuel tank 110 means a storage space for storing the liquefied fuel required by the main engine and the auxiliary engine, which are the propulsion power sources of the ship. In this case, the liquefied fuel may be interpreted as encompassing all fuels in a liquefied state, such as LNG and liquefied hydrogen.

액화 연료 탱크(110) 내에는 액화 연료가 저장되어 있으며, 이때 액화 연료 탱크(110)의 내측 하부에는 액화 연료를 열교환기(130) 방향으로 가압 공급하기 위한 인 탱크 펌프(In tank pump)(110a)가 마련된다. 따라서, 인 탱크 펌프(110a)를 통해 끌어 올려진 액화 연료는 열교환기(130)와 연결된 연결 라인을 통해 열교환기(130) 방향으로 공급되며, 열교환기(130)를 통해 증발가스(BOG)와 열교환 후 통합형 열교환기(150)를 향해 배출된다. 한편, 인 탱크 펌프(110a)의 가압력은 5bar 내지 20bar가 적용될 수 있다.Liquefied fuel is stored in the liquefied fuel tank 110 , and in this case, an In tank pump 110a for supplying the liquefied fuel under pressure in the direction of the heat exchanger 130 in the inner lower portion of the liquefied fuel tank 110 . ) is provided. Accordingly, the liquefied fuel pulled up through the in-tank pump 110a is supplied to the heat exchanger 130 through a connection line connected to the heat exchanger 130 , and boil-off gas (BOG) and After heat exchange, it is discharged toward the integrated heat exchanger 150 . Meanwhile, the pressure of the in-tank pump 110a may be 5 bar to 20 bar.

액화 연료 탱크(110) 내 액화 연료는 액화 연료 탱크(110) 내에서 증발가스 형태로 기화되면서 액화 연료 탱크(110) 내 압력을 높이게 된다. 따라서, 본원발명에서는 이러한 증발가스를 증발가스 압축기(120) 방향으로 공급하게 된다.The liquefied fuel in the liquefied fuel tank 110 is vaporized in the form of boil-off gas in the liquefied fuel tank 110 to increase the pressure in the liquefied fuel tank 110 . Accordingly, in the present invention, such boil-off gas is supplied in the direction of the boil-off gas compressor 120 .

증발가스 압축기(120)는 액화 연료 탱크(110)와 연결 라인을 통해 연결되며, 액화 연료 탱크(110) 내 증발가스를 압축하여 보조 엔진 방향으로 공급하는 역할을 한다. 증발가스 압축기(120)의 가압력은 일반적으로 5bar 내지 10bar가 적용된다. 이러한 증발가스 압축기(120)는 일 실시예에서 인터쿨러(inter cooler)가 적용될 수 있다.The BOG compressor 120 is connected to the liquefied fuel tank 110 through a connection line, and serves to compress BOG in the liquefied fuel tank 110 and supply it in the direction of the auxiliary engine. The pressurization pressure of the boil-off gas compressor 120 is generally applied to 5 bar to 10 bar. The BOG compressor 120 may be applied with an inter cooler (inter cooler) in one embodiment.

일 실시예에서, 증발가스 압축기(120)의 후단에는 쿨러(미도시)가 추가로 마련될 수 있다. 쿨러는 증발가스 압축기(120)를 통해 가압된 증발가스를 냉각시켜 보조 엔진에서 필요로 하는 연료 온도를 맞추는 역할을 한다. 이때, 쿨러는 수냉식 쿨러 및 공냉식 쿨러 중 어느 하나 이상이 적용될 수 있다.In one embodiment, a cooler (not shown) may be additionally provided at the rear end of the boil-off gas compressor 120 . The cooler cools the BOG pressurized through the BOG compressor 120 to adjust the fuel temperature required by the auxiliary engine. In this case, as the cooler, any one or more of a water-cooled cooler and an air-cooled cooler may be applied.

열교환기(130)는 인 탱크 펌프(110a)를 통해 공급되는 액화 연료와, 증발가스 압축기(120)를 통해 공급되는 증발 가스를 열교환 시킴으로써, 증발 가스가 가진 냉열을 액화 연료 방향으로 회수시키는 역할을 한다. 이때, 열교환기(130)를 통해 액화 연료 탱크(110)로 배출되는 연결 라인에는 감압밸브가 적용될 수 있으며, 추가적으로는 기액분리기(미도시)도 적용될 수 있다.The heat exchanger 130 exchanges heat between the liquefied fuel supplied through the in-tank pump 110a and the boil-off gas supplied through the boil-off gas compressor 120, thereby recovering the cooling heat of the boil-off gas toward the liquefied fuel. do. At this time, a pressure reducing valve may be applied to the connection line discharged to the liquefied fuel tank 110 through the heat exchanger 130 , and a gas-liquid separator (not shown) may additionally be applied.

감압밸브는 줄-톰슨 효과를 이용한 줄-톰슨(Joule-Thomson) 밸브가 적용될 수 있으며, 이는 제1 열교환기(130)를 통해 냉각된 증발가스를 1 내지 10bar 압력으로 감압하여 압력을 급감시키게 되고, 이 경우 온도가 함께 하강되면서 증발가스가 액화되어 액화 연료 탱크(110)에 저장되는 것이다. 또한, 일 실시예에서 감압밸브는 팽창기가 적용될 수도 있다. 이때, 일 실시예에서 감압밸브의 특성 상 증발가스 전체를 재액화시키는 것이 아닌 부분적으로 재액화시킨다는 점에서 기체 상태의 증발가스와 액체 상태의 연료가 혼재한 상태가 된다. 따라서, 감압밸브의 후단에는 기액분리기를 설치하여 감압에 의해 부분적으로 액화된 증발가스를 기체 및 액체로 분리하고, 각 상태에 따른 분기 라인을 형성하여 액체 형태의 연료만을 액화 연료 탱크(110)로 회수할 수 있다.As the pressure reducing valve, a Joule-Thomson valve using the Joule-Thomson effect may be applied, which reduces the pressure rapidly by reducing the boil-off gas cooled through the first heat exchanger 130 to a pressure of 1 to 10 bar. , in this case, the boil-off gas is liquefied as the temperature is lowered and stored in the liquefied fuel tank 110 . In addition, in an embodiment, the pressure reducing valve may be applied with an expander. At this time, according to the characteristic of the pressure reducing valve, the gaseous BOG and the liquid fuel are mixed in that the BOG is partially reliquefied rather than reliquefied in its entirety. Therefore, a gas-liquid separator is installed at the rear end of the pressure reducing valve to separate BOG partially liquefied by decompression into gas and liquid, and branch lines according to each state are formed so that only liquid fuel is transferred to the liquefied fuel tank 110 . can be recovered

부스터 펌프(140)는 열교환기(130)와 연결된 연결 라인을 통해 액화 연료를 공급받은 후 액화 연료를 가압하여 통합형 열교환기(150) 방향으로 공급하는 역할을 하며, 이때 부스터 펌프(140)의 가압력은 5bar 내지 600bar가 될 수 있다. 부스터 펌프(140)를 통해 가압 후 배출되는 액화 연료는 통합형 열교환기(150)를 거치게 된다.The booster pump 140 serves to supply the liquefied fuel through the connection line connected to the heat exchanger 130 by pressurizing the liquefied fuel and supplying the liquefied fuel in the direction of the integrated heat exchanger 150 , in which case the pressing force of the booster pump 140 . may be 5 bar to 600 bar. The liquefied fuel discharged after pressurization through the booster pump 140 passes through the integrated heat exchanger 150 .

통합형 열교환기(150)는 부스터 펌프(140)와 선박의 메인 엔진 사이에 마련되며, 부스터 펌프(140)를 통해 공급되는 액화 연료와 증발가스 압축기(120)를 통해 공급되는 증발가스를 서로 열교환 시킴으로써 증발가스 내 냉열을 회수하는 역할과, 동시에 부스터 펌프(140)를 통해 공급되는 액화 연료를 가온하여 기화시키는 역할을 역할을 한다.The integrated heat exchanger 150 is provided between the booster pump 140 and the main engine of the ship, and exchanges heat between the liquefied fuel supplied through the booster pump 140 and the boil-off gas supplied through the boil-off gas compressor 120 with each other. It serves to recover the cooling heat in the boil-off gas, and at the same time serves to heat and vaporize the liquefied fuel supplied through the booster pump 140 .

이러한 통합형 열교환기(150)는 통합형 열교환기(150)를 일측에서 타측으로 관통하는 공급 라인(151)과, 공급 라인(151)을 통과하여 흐르는 가온 냉매인 글리콜 워터를 공급하기 위한 글리콜 워터 공급부(미도시)를 포함하여 구성된다. 이때 글리콜 워터는 섭씨 50도 전후의 온도에 해당하기 때문에, 부스터 펌프(140)를 통해 공급되는 액화 연료를 기화시키게 되는 것이다.The integrated heat exchanger 150 includes a supply line 151 passing through the integrated heat exchanger 150 from one side to the other side, and a glycol water supply unit ( not shown) is included. At this time, since the glycol water corresponds to a temperature of about 50 degrees Celsius, the liquefied fuel supplied through the booster pump 140 is vaporized.

한편, 글리콜 워터 공급부는 회수되는 글리콜 워터를 재가열하여 기 설정된 가온 온도(예를 들어, 섭씨 50도 전후)가 유지되도록 하는 글리콜 워터 가열 장치(미도시)를 포함할 수 있다.Meanwhile, the glycol water supply unit may include a glycol water heating device (not shown) that reheats the recovered glycol water to maintain a preset heating temperature (eg, around 50 degrees Celsius).

글리콜 워터 가열 장치는 온도 센서(미도시)를 포함하며, 온도 센서를 통해 공급 라인(151)을 통과하는 글리콜 워터의 온도를 상시 센싱한 후, 기 설정된 온도 이하로 떨어지는 경우 글리콜 워터 가열 장치를 가열시키게 되는 것이다.The glycol water heating device includes a temperature sensor (not shown), and after constantly sensing the temperature of the glycol water passing through the supply line 151 through the temperature sensor, when the temperature falls below a preset temperature, the glycol water heating device is heated will be made

일 실시예에서, 증발가스가 보조 엔진 방향으로 공급될 경우에는 보조 엔진 전단에 트림 히터(Trim heater)(미도시)가 마련될 수 있으며, 트림 히터를 통해 보조 엔진에서 필요로 하는 연료 온도로 가온될 수 있다. 여기에서, 보조 엔진이라 함은 발전 엔진(Generator Engine 또는 보일러(Boiler)를 구동하기 위한 엔진 등을 의미할 수 있다.In one embodiment, when BOG is supplied in the direction of the auxiliary engine, a trim heater (not shown) may be provided at the front end of the auxiliary engine, and is heated to the fuel temperature required by the auxiliary engine through the trim heater. can be Here, the auxiliary engine may mean an engine for driving a generator engine or a boiler (Boiler).

또한, 일 실시예에서는 통합형 열교환기(150)의 공급 라인(151)과 배치되어 통합형 열교환기(150)를 관통하는 추가 공급 라인(미도시)가 마련될 수 있으며, 이때 추가 공급 라인을 통과하여 앞서 살펴본 트림 히터에 의해 가열된 증발 가스가 공급될 수 있다. 이 경우, 트림 히터에 의해 가열된 증발 가스가 가지는 열이 공급 라인(151)을 통해 공급되는 글리콜 워터를 추가로 가열시킬 수도 있는 것이다.In addition, in one embodiment, an additional supply line (not shown) that is disposed with the supply line 151 of the integrated heat exchanger 150 and passes through the integrated heat exchanger 150 may be provided, at this time passing through the additional supply line The boil-off gas heated by the trim heater described above may be supplied. In this case, the heat of the boil-off gas heated by the trim heater may further heat the glycol water supplied through the supply line 151 .

한편, 일 실시예에서 본 발명에서는 열교환기(130)를 통해 냉각된 증발가스를 감압밸브를 거쳐 액화 연료 탱크(110)로 공급하지 않고 곧바로 이를 부스터 펌프(140)으로 재공급할 수도 있다.Meanwhile, in the present invention, the boil-off gas cooled through the heat exchanger 130 may be directly re-supplied to the booster pump 140 without supplying it to the liquefied fuel tank 110 through the pressure reducing valve.

도 2는 다른 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.2 is a diagram illustrating the configuration of a vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to another embodiment.

도 2를 살펴보면, 본 발명의 다른 실시예에 따르면, 열교환기(130)를 통해 냉각된 증발가스는 곧바로 부스터 펌프(140)와 연결되어 부스터 펌프(140)의 연결 라인으로 공급됨으로써 액화 연료와 혼합되어 부스터 펌프(140) 방향으로 공급될 수도 있다.Referring to FIG. 2 , according to another embodiment of the present invention, BOG cooled through the heat exchanger 130 is directly connected to the booster pump 140 and supplied to the connection line of the booster pump 140 to be mixed with liquefied fuel. It may be supplied in the direction of the booster pump 140 .

또한, 다른 실시예에서 본 발명에서는 열교환기(130) 대신 혼합기가 적용될 수도 있다.Also, in another embodiment, a mixer may be applied instead of the heat exchanger 130 in the present invention.

도 3은 또 다른 실시예에 따른 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템(100)의 구성을 도시한 도면이다.3 is a view showing the configuration of the vaporizer and heat exchanger integrated boil-off gas reliquefaction system 100 according to another embodiment.

도 3을 살펴보면, 다른 구성들은 모두 동일한 상태에서 열교환기(130)가 혼합기(130')로 변경될 수 있다.Referring to FIG. 3 , the heat exchanger 130 may be changed to the mixer 130 ′ in all other configurations being the same.

혼합기(130')는 액화 연료 탱크(110)로부터 공급되는 액화 연료와 통합형 열교환기(150)를 통해 공급되는 냉각된 증발 가스를 혼합하여 부스터 펌프(140) 방향으로 공급하게 된다.The mixer 130 ′ mixes the liquefied fuel supplied from the liquefied fuel tank 110 and the cooled boil-off gas supplied through the integrated heat exchanger 150 and supplies it to the booster pump 140 .

상기에서는 본 발명의 바람직한 실시예를 참조하여 설명하였지만, 해당 기술 분야의 숙련된 당업자는 하기의 청구의 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

100: 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템
110: 액화 연료 탱크
120: 증발가스 압축기
130: 열교환기
130': 혼합기
140: 부스터 펌프
150: 통합형 열교환기
151: 공급 라인100: vaporizer and heat exchanger integrated boil-off gas reliquefaction system
110: liquid fuel tank
120: boil-off gas compressor
130: heat exchanger
130': mixer
140: booster pump
150: integrated heat exchanger
151: supply line

Claims (3)

액화 연료 탱크(110);
상기 액화 연료 탱크(110)와 연결되며, 상기 액화 연료 탱크(110) 내 증발가스(BOG)를 압축하여 선박 내 보조 엔진 방향으로 공급하는 증발가스 압축기(120);
상기 액화 연료 탱크(110)와 연결되며, 상기 액화 연료 탱크(110) 내 마련된 인 탱크 펌프(110a)를 통해 공급되는 액화 연료와 일측을 통해 공급되는 증발가스(BOG)를 서로 열교환 시킴으로써, 공급되는 증발가스 내 냉열을 회수하는 열교환기(130);
상기 열교환기(130)를 통해 배출되는 액화 연료를 가압하여 선박 내 메인 엔진 방향으로 공급하는 부스터 펌프(140); 및
상기 부스터 펌프(140)와 메인 엔진 사이에 마련되며, 상기 부스터 펌프(140)를 통해 공급되는 액화 연료와 상기 증발가스 압축기(120)를 통해 공급되는 증발가스를 서로 열교환 시킴으로써 상기 증발가스 압축기(120)로부터 공급되는 증발가스 내 냉열을 회수하고, 동시에 상기 부스터 펌프(140)를 통해 공급되는 액화 연료를 가온하여 기화시키는 통합형 열교환기(150);를 포함하고,
상기 통합형 열교환기(150)는
상기 통합형 열교환기(150)를 관통하는 공급 라인(151)를 포함하고,
상기 열교환기(130)를 통해 냉각된 증발가스는
상기 부스터 펌프(140)와 연결되어 상기 부스터 펌프(140)의 연결 라인으로 공급됨으로써 상기 액화 연료와 혼합되어 부스터 펌프(140) 방향으로 공급되고,
상기 열교환기는 액화 연료 탱크(110)로부터 공급되는 액화 연료와 통합형 열교환기(150)를 통해 공급되는 냉각된 증발 가스를 혼합하여 상기 부스터 펌프(140) 방향으로 공급하는 것을 특징으로 하는, 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템.
liquefied fuel tank 110;
a boil-off gas compressor 120 connected to the liquefied fuel tank 110, compressing boil-off gas (BOG) in the liquid fuel tank 110 and supplying it to the auxiliary engine in the ship;
It is connected to the liquefied fuel tank 110 and is supplied by exchanging heat between the liquefied fuel supplied through the in-tank pump 110a provided in the liquefied fuel tank 110 and the boil-off gas (BOG) supplied through one side with each other. a heat exchanger 130 for recovering cooling heat in the boil-off gas;
a booster pump 140 that pressurizes the liquefied fuel discharged through the heat exchanger 130 and supplies it to the main engine in the ship; and
The BOG compressor 120 is provided between the booster pump 140 and the main engine and exchanges heat between the liquefied fuel supplied through the booster pump 140 and the BOG supplied through the BOG compressor 120 with each other. ), an integrated heat exchanger 150 that recovers the cooling heat in the boil-off gas supplied from and at the same time heats and vaporizes the liquefied fuel supplied through the booster pump 140;
The integrated heat exchanger 150 is
and a supply line 151 passing through the integrated heat exchanger 150,
The boil-off gas cooled through the heat exchanger 130 is
It is connected to the booster pump 140 and supplied to the connection line of the booster pump 140, so that it is mixed with the liquefied fuel and supplied in the direction of the booster pump 140,
The heat exchanger mixes the liquefied fuel supplied from the liquefied fuel tank 110 and the cooled boil-off gas supplied through the integrated heat exchanger 150 and supplies it in the direction of the booster pump 140, vaporizer and heat exchange Air-integrated boil-off gas reliquefaction system.
 제1항에 있어서,
상기 통합형 열교환기(150)는,
상기 공급 라인(151)을 통과하는 가온 냉매인 글리콜 워터를 공급하는 글리콜 워터 공급부;를 포함하는 것을 특징으로 하는, 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템.
According to claim 1,
The integrated heat exchanger 150,
A vaporizer and heat exchanger integrated boil-off gas reliquefaction system comprising a; glycol water supply unit for supplying glycol water, which is a warming refrigerant, passing through the supply line (151).
 제2항에 있어서,
상기 글리콜 워터 공급부는,
회수되는 글리콜 워터를 재가열하여 기 설정된 가온 온도가 유지되도록 하는 글리콜 워터 가열 장치;를 포함하는 것을 특징으로 하는, 베이퍼라이저 및 열교환기 통합형 증발 가스 재액화 시스템.3. The method of claim 2,
The glycol water supply unit,
A vaporizer and heat exchanger integrated boil-off gas reliquefaction system comprising a; a glycol water heating device that reheats the recovered glycol water to maintain a preset heating temperature.
KR1020210057531A 2021-05-03 2021-05-03 Boil-off gas reliquefaction system with integrated vaporizer and heat exchanger KR102355052B1 (en)

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PCT/KR2022/003368 WO2022234941A1 (en) 2021-05-03 2022-03-10 Vaporizer- and heat exchanger-integrated boil-off gas re-liquefaction system
CN202220524930.7U CN217624059U (en) 2021-05-03 2022-03-11 Vaporizer and heat exchanger integrated boil-off gas reliquefaction system
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