CN107709150A - Ship including gas handling system - Google Patents

Ship including gas handling system Download PDF

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Publication number
CN107709150A
CN107709150A CN201680033518.2A CN201680033518A CN107709150A CN 107709150 A CN107709150 A CN 107709150A CN 201680033518 A CN201680033518 A CN 201680033518A CN 107709150 A CN107709150 A CN 107709150A
Authority
CN
China
Prior art keywords
gas
pressure
boil
storage tank
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680033518.2A
Other languages
Chinese (zh)
Other versions
CN107709150B (en
Inventor
朴昶球
李东振
李相奉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HD Hyundai Heavy Industries Co Ltd
Original Assignee
Hyundai Heavy Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyundai Heavy Industries Co Ltd filed Critical Hyundai Heavy Industries Co Ltd
Priority claimed from PCT/KR2016/006132 external-priority patent/WO2016200181A1/en
Publication of CN107709150A publication Critical patent/CN107709150A/en
Application granted granted Critical
Publication of CN107709150B publication Critical patent/CN107709150B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B63H21/38—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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • 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
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from 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
    • 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
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. 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
    • 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
    • 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
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—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
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/036—Control means using alarms
    • 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
    • F17C2250/0626—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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating
    • F17C2265/017—Purifying the fluid by separating different phases of a same fluid
    • 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
    • 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
    • F17C2265/038—Treating the boil-off by recovery with expanding
    • 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
    • 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
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

The present invention is a kind of ship including gas handling system, it is characterised in that including：Boil-off gas compressor；Reliquefaction installation, it liquefies the boil-off gas for being not supplied with demand portion；And control unit, in normally-pressured neighbor, when the internal pressure of above-mentioned liquid gas storage tank is preset more than pressure for first, the prompting for asking above-mentioned reliquefaction installation to start is provided to user.

Description

Ship including gas handling system
Technical field
The present invention relates to a kind of ship including gas handling system.
Background technology
Ship is the substantial amounts of mineral of transport, crude oil, natural gas or loads the container of more than thousands of and navigate by water ocean Means of transport, be made up of steel, swum in the state of Water Plane by buoyancy, produced by the rotation by propeller Thrust move.
This ship produces thrust by driving engine, and now, generally, engine moves piston using gasoline or diesel oil And rotate bent axle by the reciprocating motion of piston, thus, propeller can be driven by rotation by the axle being connected with bent axle.
But recently, on conveying liquified natural gas (Liquefied Natural Gas) LNG cargo ships, employ The LNG fuel supply modes of engine are driven by regarding LNG as fuel, in this way, the side that LNG is used as the fuel of engine Formula is also applied on other ships in addition to LNG cargo ships.
It is known that, conventionally, LNG is clean fuel and amount of storage is also enriched than oil, with mining and the development of transportation technology, Its dosage is also sharply increasing.Generally, this LNG drops under conditions of an atmospheric pressure using as the temperature of the methane of principal component Taken care of below to -162 degree with liquid condition, the volume for the methane being liquefied is the body of the gaseous methane under standard state Long-pending 1/600th or so, 1/the 2 of proportion 0.42, about specific gravity of crude.
But in order to drive demand portion and required temperature, pressure etc., may be with the LNG being stored in tank state not Together.Therefore, recently, lasting research and development be controlled to storing the temperature into the LNG of liquid condition, pressure etc. and to demand portion The technology of supply.
In addition, when LNG is carried out into keeping with liquid, with heat leak is produced to tank, a part of LNG is produced by gasification Boil-off gas (BOG：Boil off Gas), conventional, in order to eliminate the breakage risk of tank by reducing the pressure of tank and list Purely boil-off gas is discharged to outside.But recently to making in tank caused boil-off gas re-liquefied and being supplied to demand portion etc. The necessity of the exploitation of application scheme gradually increases.
The content of the invention
Invent problem to be solved
The present invention is proposed to solve the problems, such as described above, its object is to, there is provided one kind includes gas treatment The ship of system, so as to effectively supply liquid gas and/or boil-off gas from liquid gas storage tank to demand portion.
The technical scheme solved the problems, such as
Ship according to an embodiment of the invention including gas handling system, it is characterised in that including：Liquid gas is deposited Storage tank, for storing liquid gas；Boil-off gas compressor, for supplying the evaporation of the liquid gas storage tank to demand portion Gas；Reliquefaction installation, to passing through remaining evaporation of the boil-off gas compressor without being fed into the demand portion Gas is liquefied；And control unit, when by the liquid gas storage tank for it is safe when internal pressure be referred to as normally-pressured neighbor When, when the internal pressure of the liquid gas storage tank reach in the normally-pressured neighbor first preset more than pressure when, The prompting for asking the reliquefaction installation to start is provided to user.
Specifically, in addition to：Pump, for the liquid being stored in demand portion supply in the liquid gas storage tank Change gas, when the internal pressure of the liquid gas storage tank reach in the normally-pressured neighbor first preset pressure when, The control unit provides request by the pump come the prompting to demand portion supply liquid gas to the user.
Specifically, the boil-off gas compressor includes：Main compressor, it is in the internal pressure of the liquid gas storage tank Run all the time in the case of in the normally-pressured neighbor；And auxiliary compressor, the internal pressure of the liquid gas storage tank reach When presetting pressure to second in the normally-pressured neighbor, it is determined whether operation, when the liquid gas storage tank Internal pressure reach in the normally-pressured neighbor second when presetting pressure, the control unit can provide to the user Request by the auxiliary compressor to the demand portion supply boil-off gas prompting and request stop by the pump come to The prompting of the demand portion supply liquid gas.
Specifically, the control unit may include, when the internal pressure of the liquid gas storage tank reaches the normal pressure In the range of the 3rd when presetting pressure, provide the control that request runs the prompting of the reliquefaction installation to the user Portion.
Specifically, set in advance when the internal pressure of the liquid gas storage tank reaches the in the normally-pressured neighbor the 4th During constant-pressure, the control unit can be provided stop supplying to the demand portion by the pump again to the user and liquefied The prompting of gas.
Specifically, can also include：Gas combustion apparatus, will be normal described in the inner pressure ratio of the liquid gas storage tank When the high pressure limit of pressure limit is referred to as the first dangerous pressure scope, described is pressed in the liquid gas storage tank In the case of in the range of one dangerous pressure, the gas combustion apparatus is run.
Specifically, can also include：The mast valve of bending, by first described in the inner pressure ratio of the liquid gas storage tank When the high pressure limit of dangerous pressure scope is referred to as the second dangerous pressure scope, institute is pressed in the liquid gas storage tank In the case of stating in the range of the second dangerous pressure, the mast valve of the bending is opened.
Specifically, can also include：Safety valve, by the described in the inner pressure ratio of the liquid gas storage tank second dangerous pressure When pressure limit when power scope is high is referred to as the 3rd dangerous pressure scope, described is pressed in the liquid gas storage tank In the case of in the range of three dangerous pressures, the safety valve is opened.
Specifically, can also include：Pump, for being stored in demand portion supply in the liquid gas storage tank Liquid gas；And fluid supply apparatus, for supplying oil to the demand portion, by the inner pressure ratio of the liquid gas storage tank When the low pressure limit of the normally-pressured neighbor is referred to as the 4th dangerous pressure scope, in the internal pressure of the liquid gas storage tank In the case of in the range of the 4th dangerous pressure, the demand portion will not connect from the boil-off gas compressor and the pump The liquid gas or the boil-off gas are received, but the oil is received from the fluid supply apparatus.
Invention effect
The ship for including gas handling system of the present invention, by effectively by liquid gas and/or person's boil-off gas from Liquid gas storage tank supplies to demand portion, it is possible to increase the stability of a system and reliability.
Brief description of the drawings
Fig. 1 is the concept map of gas handling system according to an embodiment of the invention.
Fig. 2 a are the concept maps of the gasification system in the gas handling system of the present invention.
Fig. 2 b are the concept maps of the gasification system in the gas handling system of the present invention.
Fig. 2 c are the concept maps of the gasification system in the gas handling system of the present invention.
Fig. 3 is the figure for the internal pressure scope for showing the liquid gas storage tank of the present invention.
Embodiment
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Following liquid gas can be LPG (compressed petroleum gas：Liquefied Petroleum Gas), LNG, second Alkane etc., can example refer to LNG (liquefied natural gas：Liquefied Natural Gas), boil-off gas can refer to by spontaneous vaporization LNG etc. BOG (boil-off gas：Boil Off Gas).
Liquid gas can independently refer to the mixing shape such as liquid condition, gaseous state, liquid and gas with state change State, supercooled state, supercriticality etc., boil-off gas are also such.In addition, the process object of the present invention is not limited to liquid gas Body, can be liquid gas processing system and/or boil-off gas processing system.
Fig. 1 is the concept map of gas handling system according to an embodiment of the invention.
Reference picture 1, gas handling system according to an embodiment of the invention can be mounted on the ships such as LNG cargo ships, bag Include liquid gas storage tank 10, demand portion 20, boil-off gas compressor 30, booster pump 40, high-pressure pump 41, gasifier 42, pressure Gasifier 50.
Hereinafter, each composition of the gas handling system 1 of the embodiment of the invention described above one is illustrated, terminates composition side After the explanation in face, each embodiment of the relation between being formed based on system is illustrated.
In an embodiment of the present invention, First Line can also be included to the 13rd line, i.e. L1~L13.Can be on each line The valve (not shown) of aperture can be adjusted by setting, and can control boil-off gas and/or liquefied gas according to the aperture for adjusting each valve The quantity delivered of body and/or a variety of refrigerants.
Liquid gas storage tank 10 can store the liquid gas of -163 degree.Liquid gas storage tank 10 can be such as independence The tank of type, diaphragm type, compression type etc, as long as liquid gas can be stored, its size, form, structure etc. do not limit particularly System.
The liquid gas of liquid condition and the boil-off gas of gaseous state can be mixed with liquid gas storage tank 10.This It is because being permeated from the heat of outside to liquid gas storage tank 10 and causing liquid gas to be heated, as liquid gas is added There may be boil-off gas for heat.
Now, with the flow increase of boil-off gas, it can turn into and produce the original that the internal pressure of liquid gas storage tank 10 rises Cause, therefore, in order to protect liquid gas storage tank 10 and it is preferred that discharging boil-off gas.So as to which the present invention can be with liquid gas The pressure of storage tank 10 and suitably discharge boil-off gas.
The boil-off gas of discharge can be burnt by gas combustion apparatus 23 described later (Gas Combustion Unit) etc. Fall, be either available for being given to demand portion 20 (engine or turbine, boiler etc.) and being consumed.
In addition, the boil-off gas discharged from liquid gas storage tank 10, by being cooled down by the grade of reliquefaction installation 37 described later It is liquefied to liquid condition (for liquefied boil-off gas ,/class identical with liquid gas from gaseous state below to boiling point Like) carry out afterwards such as to the processing of the recurrence of liquid gas storage tank 10.
Liquid gas storage tank 10 may include insulation and anti-wall portion, to prevent the hot infiltration of outside.
Anti- wall portion is arranged at inner side (side adjacent with liquid gas), the insulation compared with anti-wall portion compared with insulation It is arranged at outside (side adjacent with hull)., can but this can be changed into different according to the structure of liquid gas storage tank 10 Whether it is that diaphragm type, self, compression type etc. are defined as polytype according to liquid gas storage tank 10.
Insulation using the adiabatic liquid gas storage tank 10 of heat-insulating material inside with it is outside.Insulation is by using poly- Urethane foam (PUF：Poly urethane foam), perlite (perlite), a variety of heat-insulating materials such as timber (wood) carry out shape Into heat insulating construction, can possess the metal such as stainless steel (SUS), invar (INVAR).
When liquid gas storage tank 10 is diaphragm type, insulation can be according to Mark III, No.96 etc. conventional widely people The type known determines structure, can be according to MOSS, SPB etc. conventional widely people when liquid gas storage tank 10 is self The type known determines structure.Certainly, insulation will not limit its structure by described example.
Anti- wall portion can come the inside and outside of adiabatic liquid gas storage tank 10 by using non-active gas.Anti- wall portion can Formed with space, the space of anti-wall portion may be formed between the inwall of liquid gas storage tank 10 and insulation and/or liquefied gas Between the outer wall and insulation of body storage tank 10 etc..
The non-active gas such as nitrogen can be charged into anti-wall portion, can by be arranged at outside non-active gas feeder come Supply non-active gas.Now, nitrogen maker (N2generator) can be used in non-active gas feeder.
Demand portion 20, can as the composition for being used to consume liquid gas etc. (liquid gas, boil-off gas or flash gas) Energy or burn-up liquid gas are released to be configured to consume liquid gas etc..
As one, demand portion 20 can use turbine low pressure engine (DFDE：Dual Fuel Diesel Electric, double fuel electric propulsion；DFDG：Dual Fuel Diesel Generator, double-fuel diesel generator；XDF： EXtra long stroke Dual Fuel, ultra-long-stroke double fuel engine machine etc.), reliquefaction installation, boiler, gas burning Device etc. has the low pressure requirements portion of the liquid gas of about 1bar to 10bar (absolute pressure) pressure and uses high pressure engine (ME-GI：MAN Electronically Controlled, Gas Injection engines etc.) etc. have about 200bar extremely The high voltage demands portion of the liquid gas of 400bar (absolute pressure) pressure, the pressure of the liquid gas needed for each demand portion 20 can With difference.
That is, demand portion 20 refers to all compositions for consuming liquid gas etc. in the present invention, and the present invention is not with specific composition Restriction demand portion 20.
Embodiments of the invention have gas supply part, for handling the liquefied gas being stored in liquid gas storage tank 10 Body or boil-off gas.Here, gas supply part is to be used to liquid gas and/or boil-off gas being transferred to the demand such as engine portion 20 composition, it may include boil-off gas compressor 30, booster pump 40, high-pressure pump 41, gasifier 42 etc..
Boil-off gas compressor 30 compresses the boil-off gas discharged from liquid gas storage tank 10.Boil-off gas compressor 30 Can be it is centrifugal, reciprocating etc., can to form boil-off gas compression unit, (symbol not be schemed by multiple boil-off gas compressors 30 Show).
In this case, the multiple boil-off gas compressors 30 for forming boil-off gas compression unit can be set to be centrifugation Formula, be it is reciprocating or it is centrifugal with it is reciprocating and deposit.
As one, boil-off gas compressor 30 includes reciprocating compressor and/or centrifugal compressor, can be set up in parallel Reciprocating compressor and centrifugal compressor, now, the discharge pressure of reciprocating compressor and centrifugal compressor can it is identical or Person differs.
As one, in the present invention boil-off gas compressor 30 can with it is centrifugal be configured to two sections, three sections, five sections, Six sections etc..For each hop count, carried out according only to the type in demand portion 20 and the required condition for the boil-off gas to be supplied Compression, it is big to be not offered as the more big relative discharge pressure of hop count.
In addition, in order to handle the boil-off gas for the low-temperature condition that the pact -100 discharged from liquid gas storage tank 10 is spent, steam Get angry gas compressor 30 can by used at ultra-low temperature compression mechanism into.But if boil-off gas is compressed by boil-off gas compressor 30, can The temperature of boil-off gas can be caused to rise, therefore, the boil-off gas compression of included multistage in boil-off gas compression unit In machine, a part of boil-off gas compressor of upstream is used at ultra-low temperature compressor, and the remaining boil-off gas compressor in downstream can To be normal temperature compressor.
The temperature of boil-off gas rises when if boil-off gas is compressed by boil-off gas compressor 30, the volume of boil-off gas Can be with increasing together, so that the volume increase of boil-off gas.This can increase the unnecessary of boil-off gas compressor 30 and bear Lotus, therefore, can be under the upstream of at least one boil-off gas compressor 30 and/or at least one boil-off gas compressor 30 Trip is provided for the boil-off gas cooler (not shown) for the boil-off gas that cooling is compressed.
Boil-off gas cooler, boil-off gas can be cooled down using a variety of low-temperature receivers, as one, boil-off gas cooler can It is a variety of using seawater, the re-liquefied refrigerant of reliquefaction installation 37, liquid gas, boil-off gas, flash gas etc..
Between each section of boil-off gas compressor 30, can possess surge tank (not in addition to boil-off gas cooler Diagram).The surge tank is to be continually provided boil-off gas and the maintenance to each section of inflow of boil-off gas compressor 30 Supply pressure and set.
The boil-off gas of boil-off gas compressor 30 is flowed into, heat exchange can be carried out with the boil-off gas compressed.Simply, The boil-off gas of boil-off gas compressor 30 is flowed into by heat exchange to be preheated, and therefore, boil-off gas compressor 30 is equal It may be configured as normal temperature compressor.
30 compressible boil-off gas of boil-off gas compressor reaches about 10bar (absolute pressure) to 400bar (definitely Pressure).This can be different for where according to the boil-off gas discharged from boil-off gas compressor 30.
As one, when the boil-off gas compressed in boil-off gas compressor 30 is used for turbine, low pressure engine During the low pressure requirements portion 22 such as (DFDE, DFDG, XDF etc.), reliquefaction installation, boiler, gas combustion apparatus, the boil-off gas compressed The pressure of body can be about 1bar to 10bar (absolute pressure), when the boil-off gas compressed is used for high pressure engine (ME-GI etc.) During Deng high voltage demands portion 21, the pressure of the boil-off gas compressed can be about 200bar to 400bar (absolute pressure).
Certainly, boil-off gas compressor 30 can be set to multistage, and low pressure is compressed into by a part of boil-off gas compressor 30 Boil-off gas, can discharge and be used in low pressure requirements portion 22 to the outside of boil-off gas compressor 30, by remaining evaporation Gas compressor 30 is further compressed into the boil-off gas of high pressure, can be to the outside discharge of boil-off gas compressor 30 and in high pressure Used in demand portion 21.
That is, in the boil-off gas compression unit with the boil-off gas compressor 30 for being arranged to multistage, it is not particularly limited To each demand portion 20 supply the pressure of boil-off gas, the quantity of boil-off gas compressor 30, boil-off gas multi-stage compression Degree etc., can differently it determine.
In order to which boil-off gas is transferred into low pressure requirements by boil-off gas compressor 30 from liquid gas storage tank 10 Portion 22 or high voltage demands portion 21, multiple supply lines (second, can be set from liquid gas storage tank 10 to each demand portion 20 3rd, the five, the seven, the 8th lines (L2, L3, L5, L7, L8) etc.).
Now, the supply line for low pressure requirements portion 22 being connected to from boil-off gas compressor (latter end or stage casing etc.) can be Low pressure supply line (the 3rd line L3), the confession in high voltage demands portion 21 is connected to from boil-off gas compressor 30 (latter end or stage casing etc.) Can be high voltage supply line (the second line L2) to line.Therefore, supply line can be branched off on the basis of boil-off gas compressor 30 Low pressure supply line (the 3rd line L3) and high voltage supply line (the second line L2).
For boil-off gas compressor 30, if boil-off gas is merely through being arranged in the boil-off gas compressor 30 of multistage A part, then boil-off gas can be compressed into low pressure and be supplied along low pressure supply line L3 to low pressure requirements portion 22, if will set The boil-off gas compressor 30 for being set to multistage all passes through, then boil-off gas can be compressed into high pressure and along high voltage supply line L2 Supplied to high voltage demands portion 21.
Boil-off gas compressor 30 can be a part of without using lubricating oil, and remainder uses lubricating oil.As one, If boil-off gas compressor 30 is arranged to five sections, one section to three sections of boil-off gas compressor can be without using lubricating oil (profit Lubricating oil is not mixed into boil-off gas), and four sections to five sections use lubricating oil (lubricating oil is mixed into boil-off gas).This be because Lubricating oil to be needed in high pressure section, so that the pressure with boil-off gas is changed into high pressure and smoothly drives boil-off gas compressor 30 piston.
Certainly, the quantity of boil-off gas compressor 30 is not limited to number as described above, can be in multiple boil-off gas pressures A leading portion part (low pressure stage) uses lubricating oil without using lubricating oil, back segment remaining (high pressure section) in contracting machine 30.
First pressure-reducing valve 341, the evaporation pressurizeed and supplied to reliquefaction installation 37 by boil-off gas compressor 30 can be made Gas decompression or expansion.Although here, not illustrating, the first pressure-reducing valve 341 makes the steaming pressurizeed by boil-off gas compressor 30 Send out gas decompression or expansion and not only supplied to reliquefaction installation 37, can also be supplied to the grade of gas combustion apparatus 23.
Set by the first pressure-reducing valve 341 together with the second pressure-reducing valve 342, can make to be pressurizeed by boil-off gas compressor 30 Boil-off gas multistage decompression or expansion.For example, the first pressure-reducing valve 341 makes the boil-off gas pressurizeed by boil-off gas compressor 30 The boil-off gas decompression for the first time or expand for the first time that body is either supplied in the stage casing branch of boil-off gas compressor 30 Backward reliquefaction installation 37 supply, and in reliquefaction installation 37 by the boil-off gas of heat exchange again by the second pressure-reducing valve 342 Second decompression or second of expansion and it is re-liquefied.
The technology of above-mentioned the first described pressure-reducing valve 341 can be realized by each embodiment by the change of composition.
Gas-liquid separator 35 is from by the first pressure-reducing valve 341 boil-off gas that either the second pressure-reducing valve 342 is depressurized or expanded It is middle to separate gas.Boil-off gas is separated into liquids and gases in gas-liquid separator 35, wherein, liquid is fed into liquefied gas Body storage tank 10, gas can be fed into gas combustion apparatus 23 as flash gas.
Here, the boil-off gas supplied to gas-liquid separator 35 can be by the first pressure-reducing valve 341 or by the second decompression Valve 342 depressurizes and cooled state.For example, boil-off gas can be pressurizeed by the multistage of boil-off gas compressor 30 and have 200bar To 400bar pressure, and reach 45 degree or so of temperature.The boil-off gas of 45 degree or so temperature is risen to via the first decompression Valve 341 and be recovered to reliquefaction installation 37, be fed into second again by the boil-off gas of heat exchange in reliquefaction installation 37 Pressure-reducing valve 342.Now, boil-off gas can be depressurized by the first pressure-reducing valve 341 or the second pressure-reducing valve 342 and being cooled has about The temperature of the 1bar degree of pressure peace treaty -162.3 left and right.
In this way, in the present embodiment, the boil-off gas supplied to gas-liquid separator 35 is by the first pressure-reducing valve 341 or second Pressure-reducing valve 342 depressurizes (or multistage decompression) with the temperature lower than -162 degree, and therefore, about the 30~40% of boil-off gas can It is liquefied.Afterwards, liquefied gas is recycled to liquid gas storage tank 10 by gas-liquid separator 35, and can be incited somebody to action by the 9th line L9 Caused flash gas is supplied to gas combustion apparatus 232 and burnt in gas-liquid separator 35, without losing.
Second pressure-reducing valve 342 is pressurizeed and in reliquefaction installation 37 by the steaming of heat exchange by making by boil-off gas compressor 30 Send out gas decompression or expansion and its at least a portion liquefies.For example, boil-off gas can be pressurised into by the second pressure-reducing valve 342 1bar to 10bar, boil-off gas can be decompressed to 1bar when being liquefied and being transferred to liquid gas storage tank 10, boil-off gas can Reach cooling effect in decompression.
Although here, by the boil-off gas that boil-off gas compressor 30 pressurizes in reliquefaction installation 37 with from liquid gas The boil-off gas that storage tank 10 is supplied to carries out heat exchange and is cooled, but pressure can be maintained from boil-off gas compressor 30 The discharge pressure of discharge.The present embodiment depressurizes boil-off gas using the second pressure-reducing valve 342, so that boil-off gas cools down, thus, Boil-off gas can be made to liquefy.Now, the cooling effect of boil-off gas can increase as the pressure limit being depressurized increases, and make The boil-off gas that can make to be forced into 300bar by boil-off gas compressor 30 for second pressure-reducing valve 342 is decompressed to 1bar.
Second pressure-reducing valve 342 can be made up of Joule Thompson valve.Unlike this, the second pressure-reducing valve 342 can be by expanding machine It is (not shown) to form.In the case of Joule Thompson valve, boil-off gas can be effectively cooled down by depressurizing, so that at least A part of boil-off gas is liquefied.Now, expanding machine can be by expander (Expander；Do not illustrate) form.
On the contrary, expanding machine can just be driven without other electric power, especially, steamed by the way that caused power is used as into driving Get angry the electric power of gas compressor 30, it is possible to increase the efficiency of gas handling system 1.For power transmission, for example, can be in gear Realized after connection or electric conversion by transmitting.
Second pressure-reducing valve 342 as described above can be evaporated in multistage decompression together with the first previously described pressure-reducing valve 341 Gas compressor 30 pressurizes and in reliquefaction installation 37 by the boil-off gas of heat exchange, or can multistage pressurization in boil-off gas pressure The stage casing branch of contracting machine 30 and the boil-off gas being supplied to, this can neatly be fitted according to each embodiment by the change of structure With.
Booster pump 40 (Boosting Pump) and high-pressure pump 41 (High Pressure Pump) can pressurize liquid gas To the pressure needed for demand portion 20, or liquid gas can be pressurizeed into close to the pressure needed for demand portion 20.In the present invention In, demand portion 20 can be high voltage demands portion 21 and low pressure requirements portion 22 etc., due to the liquid gas needed for each demand portion 20 Pressure may be different, therefore, as mentioned, can be made up of booster pump 40 and high-pressure pump 41, can also be only by booster pump 40 Form or be only made up of high-pressure pump 41, can additionally be formed in a variety of forms.That is, the liquid gas that pump 40,41 is pressurizeed Pressure, the required of portion 20 can differently be determined from for 10bar to 400bar (absolute pressure) according to demand, the present invention to this not It is particularly limited.
Now, each booster pump 40 and high-pressure pump 41 can be set to multiple, can be using any pump as mainly use will be another Pump is as standby.It is of course also possible to by driving more than two pumps to reduce load simultaneously.
Liquid gas storage tank 10 can be connected with for line (First Line L1 and the 6th line L6) to supply liquid gas etc., And it can be flowed along multiple described line L1, L6.Now, for supplying line L1, L6 of liquid gas connectable to described later Gasifier 42 and/or demand portion 20, so that liquid gas can be transferred to demand portion 20 from liquid gas storage tank 10.
Line L1, L6 for supplying liquid gas can be connected to from liquid gas storage tank 10 via pump 40,41 The high pressure liquefied gas supply line (First Line L1) in high voltage demands portion 21, and/or person from liquid gas storage tank 10 via pump 40 And it is connected to the low pressure liquefied gas supply line (the 6th line L6) in low pressure requirements portion 22.High pressure liquefied gas confession is provided with the same time In the case of line L1 and low pressure liquefied gas supply line L6, high pressure liquefied gas supply line L1 and low pressure liquefied gas supply line L6 can in a liquefied gas supplying line branch, and can according to demand the required pressure in portion 20 and differently determine branch point (make For one between booster pump 40 and high-pressure pump 41 etc.).
Gasifier 42 heats to liquid gas.The liquid gas stored in liquid gas storage tank 10 is about -160 degree Ultralow temperature, can be 10 to 50 degree (be preferably from about 45 degree) in the required temperature of the liquid gas needed for demand portion 20.Therefore, When liquid gas is transferred into demand portion 20, it is necessary to improve the temperature of liquid gas.
Certainly, although the temperature of liquid gas can rise when being pressurizeed with pump 40,41, not enough fully, because This, other thermal source (steam, ethylene glycol water, seawater, the exhaust of engine, the cooling water of engine, electricity etc.) can be used in gasifier 42 Carry out heats liquefied gas.
In order to supply thermal source to gasifier 42, the present invention may include the heating agent storage tank 421 that gasifies, and gasify heat medium circulation pump 422, gasification heating agent feedway 423, gasify heat exchanger 424.
Gasification heating agent storage tank 421 can stably maintain gas as interim storage as the tank of the gasification heating agent of thermal source Change the quantity delivered of heating agent.
Gasification heat medium circulation pump 422 is to supply gasification heating agent from gasification heating agent storage tank 421 to gasification heat exchanger 424 Composition, can be set to it is multiple and in parallel or in series, when gasify heating agent be gas when, can be by setting thermal source compressor (not Diagram) come substitute gasification heat medium circulation pump 422.
Gasification heating agent feedway 423 heats to gasification heating agent.Gasification heating agent heats in the heat exchanger 424 that gasifies It can be cooled while liquid gas, therefore, it is necessary to cooled gasification heating agent supplemental heat.Therefore, gasify heating agent quilt After the heating such as steam can in the heat exchanger 424 that gasifies heats liquefied gas.
Gasification heating agent feedway 423 may include that the first feedway of multiple gasification heating agents 4231 and gasification heating agent second supply To device 4232.Here, the first feedway of gasification heating agent 4231 and the second feedway of gasification heating agent 4232 can be each The cooling water (Jacket Cooling Water) or seawater of engine, and may be configured as alongside one another or serial.
Now, the heating agent that gasifies can connect gasification heat exchanger 424, gasification heating agent feedway 423, heat of gasification along circulation The circular route GL of the gasification heating agent of matchmaker's circulating pump 422 and gasification heating agent storage tank 421 is flowed, still, by gasification heating agent Circular route GL and connected each composition (gasification heat exchanger 424, gasification heating agent feedway 423, gasification heat medium circulation pump 422 and gasification heating agent storage tank 421) order, can by with accompanying drawing it is differently various in a manner of change.
In addition, gasification heating agent circular route GL can be connected with gasification heating agent branch line (GLb, GBL1, GBL2), suitably to adjust The temperature for the gasification heating agent for saving roundabout gasification heating agent feedway 423 and being supplied to gasification heat exchanger 424, gasification heating agent branch Line (GLb, GBL1, GBL2) can gasify from the gasification heating agent circular route GL branches of the upstream of gasification heating agent feedway 423 The downstream of heating agent feedway 423 is merged into gasification heating agent circular route GL.
Gasify heat exchanger 424, can be by the gasification heating agent of circulation to the liquefaction flowed in liquefied gas supplying line L1 Gas supplies thermal source and the liquid gas that gasifies.The form of the composition of gasification heat exchanger 424 can use shell-and-tube (shell＆tube) Deng a variety of compositions of other heat exchangers, not special restriction.
Gas supply part can also include forced gasification device 50, gas-liquid separator 51, heater.Now, forced gasification device 50th, gas-liquid separator 51, heater can be disposed on the low pressure liquefied gas of low pressure liquefied gas supply line L6 (the 6th line) Supply is formed, and above-described intensifier and high-pressure pump 40,41, gasifier 42 can be to be arranged at high pressure liquefied gas supply line The composition of L1 high pressure liquefied gas supply.
The composition of low pressure liquefied gas supply can supply with high pressure liquefied gas form together with or be separately provided, this can be with The composition in demand portion 20 and differently change, so as to which there is no particular limitation.
Low pressure liquefied gas supply is formed and high pressure liquefied gas supply is configured to that booster pump 40 can be shared.That is, low pressure liquid Change gas feed line and high pressure liquefied gas supply line at least a portion be shared and can be in the downstream branch of booster pump 40.
Forced gasification device 50 gasifies to liquid gas.Forced gasification device 50 can be heated from liquid gas using thermal source Storage tank 10 and/or booster pump 40 are supplied to liquid gas, to be vaporized, now, using to thermal source can exist before this Steam, ethylene glycol water, seawater, the exhaust of engine, the cooling water of engine, electricity in the explanation of gasifier 42 etc..In addition, force gas Thermal source can be shared with gasifier 42 by changing device 50.
Forced gasification device 50 can be connected with low pressure liquefied gas supply line L6, and make gasifying liquefied gas and needed to low pressure Portion 22 is asked to transmit.Now, methane, propane, butane etc. have been mixed into liquid gas, in the liquefied gas heated with forced gasification device 50 In body, methane is gasified, and propane or butane etc. (hereinafter referred to as heavy carbon) can maintain liquid.
Gas-liquid separator 51 (or can be weight carbon separation unit) separation is stayed in vaporized liquid gas with liquid Weight carbon.In the case where substantial amounts of weight carbon flow enters, demand portion 20 (preferred lower pressure demand portion 22) the driving effect of liquid gas is consumed Rate can be lowered.Therefore, by the present invention in that gasifying liquefied gas and separate maintain liquid heavy carbon, improve to demand portion 20 The quality of the liquid gas of supply, so as to improve the drive efficiency in demand portion 20.
Now, gas-liquid separator 51 can be referred to as demister, weight carbon separation unit etc., and the heavy carbon of liquid can be returned to liquid gas Storage tank 10 is transferred into the tank being separately provided, therefore, gas-liquid separator 51, which may be provided with, is connected to liquid gas storage The heavy carbon tropic (not shown) of tank 10.
Heater heats to the liquid gas of separation weight carbon.Although forced gasification device 50 adds to liquid gas Heat, still, vaporized liquid gas have the temperature (as one -100 degree) for making weight carbon be remained using liquid, accordingly, it is possible to The temperature needed for demand portion 20 can be unable to reach.
Therefore, heater can be heated in the same manner as forced gasification device 50 using various heating sources to liquid gas, this When, thermal source can be shared with forced gasification device 50 and/or gasifier 42.
In an embodiment of the present invention, in order to filter the liquid gas being flowed into forced gasification device 50, forced gasification device 50 upstream is also provided with filter (strainer：It is not shown).Filter can be multiple valves and combination of filters Form.
Although being stored with liquid gas in liquid gas storage tank 10,, can because of the multiple fluid returned from outside It can have in the liquid gas that impurity is mixed into inside liquid gas storage tank 10.Therefore, filter, it can sift out and be mixed into liquefied gas Impurity in body, to transmit pure liquid gas to forced gasification device 50.
As illustrated before this, in order to remove weight carbon, the gasification liquid gas of forced gasification device 50 reaches about -100 degree left and right. Now, can be by setting liquid gas adjuster (not shown) to be transmitted to adjust from forced gasification device 50 on forced gasification device 50 To the state (temperature etc.) of weight carbon separation unit and/or the liquid gas of heater.
Gas supply part in the present embodiment can also include H/D compressors 36, reliquefaction installation 37 and return pump 38。
In order that caused boil-off gas is discharged or disappeared but to outside in liquid gas storage tank 10 when fuel stores, H/D compressors 36 can be used for compressing purposes, and the type of the compressor is not limited.
Reliquefaction installation 37 can be carried out re-liquefied by re-liquefied refrigerant to the boil-off gas of surplus, and make its recurrence Into liquid gas storage tank 10.Reliquefaction installation 37 may include that re-liquefied heat exchanger (not shown), re-liquefied refrigerant supply Give device (not shown).
Reliquefaction installation 37 is supplied for re-liquefied boil-off gas cold air, from again by re-liquefied refrigerant supplying device The refrigerant that liquefying refrigerating agent feeding device is supplied to is supplied by other pump (not shown) to re-liquefied heat exchanger, by This, by boil-off gas cool-air feed and can be re-liquefied.
Pump 38 is returned, liquid, the gas can be supplied to liquid gas storage tank 10 in gas-liquid separator 35 by the tenth line L10 Liquid/gas separator 35 is used to that liquid and gaseous state will to be separated into by re-liquefied boil-off gas in reliquefaction installation 37.
Now, in the present invention, (the liquid when supplying liquid not from gas-liquid separator 35 to liquid gas storage tank 10 Supply situation about being interrupted by the pressure gap between gas-liquid separator 35 and the internal pressure of liquid gas storage tank 10), can lead to Cross the 11st line L11 and multiple by-passing valves (not shown) and the recurrence pump 38 as bypass line and can be stored to liquid gas Tank 10 supplies the liquid of gas-liquid separator 35.
Specifically, when the boil-off gas of liquid is stored in gas-liquid with the pressure of the internal pressure more than liquid gas storage tank 10 When in separator 35, it can be supplied by the tenth line L10 to liquid gas storage tank 10, when the boil-off gas of liquid is with small , can be by driving re-liquefied supply when the pressure of the internal pressure of liquid gas storage tank 10 is stored in the first gas-liquid separator 35 Pump 38 is supplied to liquid gas storage tank 10.
Hereinafter, each composition by described above is illustrated to be capable of the embodiment of derived gas handling system.
Gas handling system 1 according to embodiments of the present invention, it can also include locating by indivedual compositions of described above Manage liquid gas or boil-off gas and the composition supplied to demand portion 20.
Hereinafter, explanation is stored in the treatment mechanism of the liquid gas in liquid gas storage tank 10 and in liquid gas successively The treatment mechanism of caused boil-off gas in storage tank 10.
First, illustrate the treatment mechanism of liquid gas being stored in liquid gas storage tank 10, implemented according to the present invention The gas handling system 1 of example, make the liquid gas that is stored in liquid gas storage tank 10 along First Line L1 to demand portion 20 When being supplied, carry out sifting out liquid gas by filter (not shown) after first time pressurization using booster pump 40 Impurity, a) it can be supplied afterwards along the 6th line L6 to forced gasification device 50, or can be b) along First Line L1 to high-pressure pump 41 are supplied.
A) liquid gas supplied along the 6th line L6 to forced gasification device 50.Be forced gasifier 50 heat and at least one Part is gasified, and the liquid gas for being forced gasification is fed into gas-liquid separator 51 and is separated into gas and liquid, and again Carbon is separated into liquid and is returned in liquid gas storage tank 10, removes the gas of weight carbon component and can be fed into low pressure requirements Portion 22.
B) liquid gas supplied along First Line L1 to high-pressure pump 41, high pressure is pressurizeed into by high-pressure pump 41, and gasified Device 42 can supply after gasifying to high voltage demands portion 21.
The treatment mechanism of the caused boil-off gas in liquid gas storage tank 10 is illustrated, implemented according to the present invention The gas handling system 1 of example, makes the caused boil-off gas edge in liquid gas storage tank 10 using boil-off gas compressor 30 C) the second line L2 or d) the 3rd line L3 carries out multistage pressurization and supplied to demand portion 20.
C) boil-off gas supplied by the second line L2, by the multi-stage compression of boil-off gas compressor 30 into high pressure and can be to High voltage demands portion 21 supplies, and can also be supplied with by above-mentioned process b) together with high-pressure gasified liquid gas interflow To high voltage demands portion 21.
Pass through the boil-off gas that d) the 3rd line L3 is supplied to, it is evaporating as the boil-off gas by the second line L2 supplies The boil-off gas for being branched and supplying on two sections of gas compressor 30 or three sections, it can supply to low pressure requirements portion 22, may be used also With with being collaborated by above-mentioned a) process with being forced the liquid gas of gasification to be supplied to low pressure requirements portion 22.
Now, the liquid gas for being forced gasification supplied by forced gasification device 50, can be in the combustion in low pressure requirements portion 22 Expect to be supplied to during consumption increase, certainly, be not limited to this (be stored in the liquid gas in liquid gas storage tank 10 and Speech, because the component ratio of weight carbon is high and carrys out liquefied heavy using forced gasification device 50 and gas-liquid separator 51 to be reduced Carbon, and the gas only removed it supplies to low pressure requirements portion 22, so that the efficiency in low pressure requirements portion 22 can be improved).
Certainly, caused boil-off gas can be as described above to the He of gas combustion apparatus 23 in liquid gas storage tank 10 The mast 24 of bending supplies, in this case, can be by other line (reference not shown) via being arranged on line Valve (reference not shown) come to gas combustion apparatus 23 or bending mast 24 supplied.
Gas handling system 1 according to embodiments of the present invention may include, be controlled according to the internal pressure of liquid gas storage tank 10 Boil-off gas compressor 30 processed, reliquefaction installation 37, the technology of pump 40.Hereinafter, 3 explanation pressure limits and control referring to the drawings.
The embodiment of the present invention can also include the first control unit (not shown), and it is according to the internal pressure of liquid gas storage tank 10 Remind whether run boil-off gas compressor 30, reliquefaction installation 37, pump 40 to user.
For the first control unit, when the internal pressure of liquid gas storage tank 10 reaches first pre- in normally-pressured neighbor Pn When first setting pressure P1, request can be provided to user by pump 40 to be used to disappear to advancing engine 21 or the grade of power generation engine 22 The prompting (HPP start request) of the demand portion supply liquid gas of liquid gas is consumed, pressure is preset when reaching second During power P2, request can be provided to user and stop being used to consume liquid to the advancing engine 21 based on pump 40 or the grade of power generation engine 22 Change gas demand portion supply liquid gas and request by the auxiliary compressor 32 in boil-off gas compressor 30 come to propulsion Engine 21 or the grade of power generation engine 22 are used for prompting (the HPP stop for the demand portion supply boil-off gas for consuming liquid gas request and 2ndHPC start request), when reaching the 3rd and presetting pressure P3, can be provided to user please The prompting (Reliquefaction plant start request) for asking reliquefaction installation 37 to start, sets in advance when reaching the 4th During constant-pressure P4, re-request can be provided to user and stop to advancing engine 21 or the grade of power generation engine 22 being used for by pump 40 Consume the prompting (HPP stop request) of the demand portion supply liquid gas of liquid gas.
Now, normally-pressured neighbor Pn refers to that the internal pressure of liquid gas storage tank 10 (is made for the internal pressure scope of security situation It is a 1.04bar between 1.29bar), in normally-pressured neighbor Pn, pressure P1, second can be preset according to first Preset pressure P2, the 3rd preset pressure P3, the 4th order pressure for presetting pressure P4 becomes big.As one One to preset pressure P1 can be 1.06bar, and it can be 1.2bar to preset pressure P2 as one second, as one 3rd to preset pressure P3 can be 1.27bar, and it can be 1.8bar to preset pressure P4 as one the 4th.
In addition, boil-off gas compressor 30 may include：Main compressor 31 is normal when being pressed in liquid gas storage tank 10 Acted all the time when in pressure limit Pn；And auxiliary compressor 32, when the internal pressure of liquid gas storage tank 10 reaches normal pressure Second in scope Pn when presetting pressure P2, determines if to run.
In embodiments of the present invention, liquid gas storage tank 10 can have：It is high as inner pressure ratio normally-pressured neighbor Pn First dangerous pressure scope D1~D2 of pressure limit (as a 1.29bar to 1.32bar)；As than the first dangerous pressure Second dangerous pressure scope D2~D3 of pressure limit high scope D1~D2 (as a 1.32bar to 1.35bar)；As 3rd dangerous pressure scope (more than D3 of the pressure limit higher than the second dangerous pressure scope：As a more than 1.35bar)； The 4th dangerous pressure scope (below the D4 as the pressure limit lower than normally-pressured neighbor：As a below 1.03bar).
In addition, the embodiment of the present invention can also include：First flow path (mark not shown；In the second line L2, boil-off gas It is located at the possessed line of boil-off gas compressor 30 of downside in compressor 30), connection liquid gas storage tank 10 draws with propulsion 21 or power generation engine 22 are held up, and caused boil-off gas is the situation in normally-pressured neighbor Pn in liquid gas storage tank 10 Under flow to advancing engine 21 all the time；Second flow path (mark not shown；In the second line L2, it is located in boil-off gas compressor 30 The possessed line of boil-off gas compressor 30 of upside), at least a portion is connected to first flow path side by side, makes to deposit in liquid gas Caused boil-off gas flows to advancing engine 21 in storage tank 10；3rd stream (First Line L1), connection liquid gas storage tank 10 With advancing engine 21, the liquid gas for being stored in liquid gas storage tank 10 is set to flow to advancing engine 21；4th stream, first Stream or second flow path are branched and are connected with reliquefaction installation 37.
Now, the first control unit can according to the internal pressure of liquid gas storage tank 10 come to user provide make boil-off gas or The prompting that person's liquid gas flows in the first flow path into the 3rd stream.
Specifically, for the first control unit, when the internal pressure of liquid gas storage tank 10 reaches normally-pressured neighbor Pn's First when presetting pressure P1, and request can be provided to user and supplies liquid gas to advancing engine 21 by the 3rd stream Prompting, when reaching second and presetting pressure P2, request can be provided to user by second flow path come to advancing engine Request is provided while the prompting of 21 supply boil-off gas to user to stop liquefying to supply to demand portion by the 3rd stream The prompting of gas, when reaching the 3rd and presetting pressure P3, request can be provided to user by the 4th stream come to liquid again The promptings of 37 supply boil-off gas is put in makeup, when reaching the 4th and presetting pressure P4, can be provided request to user and be stopped The prompting of liquid gas is supplied to advancing engine 21 by the 3rd stream.
In addition, the embodiment of the present invention may be provided with the second control unit (not shown), for the second control unit, work as liquefied gas When the internal pressure of body storage tank 10 reaches first dangerous pressure scope D1~D2, (the GCU supply valves of gas combustion apparatus 23 can be run (mark not shown) is open；GCU vavle open), when reaching second dangerous pressure scope D2~D3, the mast of bending can be opened Stem valve (mark not shown；Vent valve open), when reaching the 3rd dangerous pressure scope (more than D3), safety valve can be opened 25(Safety valve open)。
In addition, when the internal pressure of liquid gas storage tank 10 reaches the 4th dangerous pressure scope (below D4), the second control Portion stops the driving of boil-off gas compressor 30 and pump 40 and runs the oil that (F.O.start) is used to supply oil to demand portion 20 Feedway (not shown), so that demand portion 20 does not receive liquid gas or boil-off gas from boil-off gas compressor 30 and pump 40 Body but run by receiving oil from fluid supply apparatus.Here, carried out in a manner of being first and second by control section Illustrate, it is of course also possible to realize the control with a control unit.
In embodiments of the present invention, it can manage and handle caused steaming in liquefaction gas storage tanks 10 by controlling ship's speed Get angry body, therefore, there is the prompting based on the first and second control unit as described above, also liquid gas can fully be stored The possibility that the internal pressure of tank 10 is effectively controlled
In this way, the embodiment of the present invention controls boil-off gas compressor 30, again according to the internal pressure of liquid gas storage tank 10 Liquefying plant 37, pump 40, thereby, it is possible to effectively handle the boil-off gas inside liquefaction gas storage tanks 10, so as to which user can The internal pressure management in liquid gas storage tank 10 is effectively carried out by the first and second control units.
Gas handling system 1 according to embodiments of the present invention can have when fuel stores and safeguard liquid gas storage tank The technology of H/D compressors 36 can be shared when 10.
Gas handling system 1 according to embodiments of the present invention mainly includes：Caused by liquid gas storage tank 10 The H/D compressors 36 that boil-off gas is pressurizeed；For the heating heated to the boil-off gas compressed by H/D compressors 36 Device (not shown)；And when fuel stores at the land storage for the liquid gas that storage will supply to liquid gas storage tank 10 (Shore) or when fuel stores in interim storage liquid gas storage tank 10 at the interim storage of caused boil-off gas (not shown).
When being loaded into (Loading) liquid gas externally to liquid gas storage tank 10 first, (it is included in liquid gas The situation that the upkeep operation of storage tank 10 loads liquid gas onto ship after terminating), i.e. in view of liquefied gas it is the flammable of ultralow temperature Material, when fuel stores, special operation should be differently carried out in advance with general storage tank, that is, replace operation.
The method of replacing of usual liquid gas storage tank 10, gas is dried by being supplied to the inside of liquid gas storage tank 10 Body is made a return journey moisture removal, and is made a return journey by supplying non-active gas to the inside of liquid gas storage tank 10 except oxygen, to eliminate fire Calamity or the possibility of explosion.Afterwards, carry out by the inside of liquid gas storage tank 10 supply hydrocarbon gases make a return journey unless Active gases and using liquid gas come cooling (Cool-down) process of cooling liquid gas storage tanks 10.It is once cooled Journey terminates, and method of replacing just completes, and just the liquid gas such as LNG are supplied to the inside of liquid gas storage tank 10 afterwards and are entered Row ship-loading operation.
Conversely, when the liquid gas unloading (Unloading) that will be stored in liquid gas storage tank 10 is to land (it is included in the feelings for all removing liquid gas before the upkeep operation of liquid gas storage tank 10 during demand portion (Shore) Condition), carry out the operation slightly different with described process.
First, the liquid gas being stored in liquid gas storage tank 10 of whole is discharged to demand portion (Shore).This When, the liquid gas of remaining is had, can be passed through the stage of heating in order to which the liquid gas of remaining is all removed.In heating rank Section after caused boil-off gas, is added by using compressor compresses in liquid gas storage tank 10 with other heater Heat makes it be returned to liquid gas storage tank 10 again, thus, the internal temperature of increase liquid gas storage tank 10 and by remaining Liquid gas all gasifies.After the temperature rise period, in order to remove all evapn gas remaining in liquid gas storage tank 10, By supplying non-active gas and putting into dry gas come dry interior, oxygen is supplied afterwards, inside can be flowed into air. By said process, terminate the uninstall process of liquid gas storage tank 10, the work people for upkeep operation etc. can be introduced afterwards Member.
Here, during liquid gas loading (when fuel stores), even if having been carried out to liquid gas storage tank 10 cold But, many boil-off gas can be also produced when liquid gas is loaded onto ship, now, the internal pressure for having liquid gas storage tank 10 rises Hidden danger, in order to which caused boil-off gas is used into compressor to outside (Shore) discharge.
In addition, in liquid gas uninstall process, in the temperature rise period, in order to improve the inside of liquid gas storage tank 10 Temperature and compressor is used during Compression Evaporation gas.
H/D compressors 36 compression process that uses and will can liquefy during liquid gas loading as described above The compression process used during gas offloading is all realized.
That is, H/D compressors 36, boil-off gas caused by being stored in fuel can be pressurizeed and to land demand portion (Shore) supply, or when liquid gas unload (before liquid gas storage tank 10 is safeguarded) to remaining in the temperature rise period Boil-off gas in liquid gas storage tank 10 is pressurizeed, so that it returns again to liquid gas storage tank 10, so as to The boil-off gas can be made to be circulated to liquid gas storage tank 10.
Specifically, H/D compressors 36, when fuel stores, can be received by the 7th line L7 in liquid gas storage tank In 10 caused boil-off gas and be compressed and to land demand portion (Shore) supply, (safeguarded when unloading liquid gas When before liquid gas storage tank 10), pressurizeed to remaining in the boil-off gas in liquid gas storage tank 10 and use heating It is set to be returned in liquid gas storage tank 10 via the 8th line L8 and the tenth two wires L12 after the heating of device 361, so as to evaporation Gas can be followed with the order of liquid gas storage tank 10, H/D compressors 36, heater 361, liquid gas storage tank 10 Ring.Therefore, it is possible to make the liquid gas being stored in liquid gas storage tank 10 all gasify, and vaporized liquid gas can All discharged to the outside of liquid gas storage tank 10.
Now, H/D compressors 36 can be high capacity (High Duty) type compressor.
That is, H/D compressors 36, make to be compressed boil-off gas caused by fuel storage and to demand portion (Shore), can also be in order to (start to safeguard that liquid gas is deposited when unloading liquid gas during spuing while use When before storage tank 10) the remaining liquid gas that makes to be stored in liquid gas storage tank 10 all gasifies, and the mistake pressurizeed Used in journey, with the temperature of the boil-off gas by improving remaining, and being capable of circulation liquefaction gas storage tanks 10.
In this way, in an embodiment of the present invention, when fuel stores and when liquid gas unloads or liquefaction can be safeguarded H/D compressors 36 are shared during gas storage tanks 10, thus, the cost of compressor is reduced, reduces the structure space of system, from And with the effect in maximization ship using space.
Gas handling system 1 according to embodiments of the present invention can also include：By being added together with reliquefaction installation 37 First pressure-reducing valve 341 set improves the technology of re-liquefied rate；Roundabout it can be returned according to the internal pressure of gas-liquid separator 35 The technology of pump 35；And the technology of line that shared boil-off gas is supplied to GCU23 and reliquefaction installation 37.
Gas handling system 1 according to embodiments of the present invention, mainly includes：Boil-off gas compressor 30, it is to liquefying Caused boil-off gas carries out multistage pressurization in gas storage tanks 10；Reliquefaction installation 37, is made by boil-off gas by refrigerant The boil-off gas liquefaction that compressor 30 compresses；First pressure-reducing valve 341, make to be subtracted by the boil-off gas that boil-off gas compressor 30 compresses Pressure or expansion；Second pressure-reducing valve 342, the boil-off gas decompression or swollen for making to be liquefied at least partially by reliquefaction installation It is swollen；And gas-liquid separator 35, make the pressure for being maintained to be depressurized to for the second time to the re-liquefied boil-off gas of the second pressure-reducing valve 342 Power, and it is separated into gaseous state and liquid
Here, reliquefaction installation 37, boil-off gas compressor 30 stage casing branch and make to be compressed into by refrigerant low The boil-off gas liquefaction of (13bar to 15bar) is pressed, more specifically, is compressed in the stage casing branch of boil-off gas compressor 30 Into low pressure (13bar to 15bar) boil-off gas, it is depressurized into by the first pressure-reducing valve 341 after 7bar to 8bar by re-liquefied dress Put 37 coolings, cooled boil-off gas can be depressurized into 5bar to 6bar second by the second pressure-reducing valve 342.
It is and conventional in this way, in an embodiment of the present invention, pressure-reducing valve 342 can be also set up in the rear end of reliquefaction installation 37 Compared to can further improve re-liquefied efficiency.
In addition, gas-liquid separator 35 make separated gaseous state via heater 33 and to consumption flash gas (flash Gas gas combustion apparatus 23) is supplied, and separated liquid can be made to be returned to liquid gas storage tank 10.In the present invention It can also include in embodiment：Connect the tropic L10 (the tenth line) of gas-liquid separator 35 and liquid gas storage tank 10；Bypass Tropic L10 bypass line L11 (the 11st line)；It is arranged on bypass line L11, and makes the liquid being stored in gas-liquid separator 35 The liquid gas of state is returned to the recurrence pump 38 of liquid gas storage tank 10；And in the first pressure-reducing valve 341 and reliquefaction installation Branch between 37 and be used for gas combustion apparatus 23 supply branch line (not shown).
Specifically, for the liquid gas for the liquid being stored in gas-liquid separator 35, when gas-liquid separator 35 Internal pressure is that when presetting more than pressure value, can be supplied by tropic L10 (the tenth line) to liquid gas storage tank 10, work as gas The internal pressure of liquid/gas separator 35 can return pump 38 and via bypass line L11 the (the 11st less than when presetting pressure value by driving Line) and can be supplied to liquid gas storage tank 10.
That is, because gas-liquid separator 35 is stored by second of the boil-off gas for being depressurized to 5bar to 6bar of the second pressure-reducing valve 342 Body, therefore, the internal pressure than liquid gas storage tank 10 are big, so that the boil-off gas being depressurized of liquid is according to as physical law Barometric gradient can be supplied naturally, when gas-liquid separator 35 internal pressure for preset more than pressure value when, pass through Tropic L10 and can be supplied to liquid gas storage tank 10, therefore with prevent return pump 38 driving power consumption And the effect of the stably return to liquid gas storage tank 10 can be realized.
In addition, for branch line, the boil-off gas of low pressure is compressed into when the stage casing branch in boil-off gas compressor 30 When the quantity delivered ratio of body is preset more than quantity delivered, it can be supplied to gas combustion apparatus 23 in the stage casing of boil-off gas compressor 30 Be branched and be compressed at least a portion of the boil-off gas of low pressure, when being branched in the stage casing of boil-off gas compressor 30 and The quantity delivered of the boil-off gas of low pressure is compressed into less than when presetting quantity delivered, can be by the stage casing of boil-off gas compressor 30 The boil-off gas for being branched and being compressed into low pressure all supplies to reliquefaction installation 37.
That is, the first pressure-reducing valve 341 and the second pressure-reducing valve 342 are arranged on the 4th line L4 together, so as to except the 4th line The effluent line of other boil-off gas compressor 30 need not be set outside L4, therefore, it is possible to minimize boil-off gas compressor (301) branch line, thus, there is the effect of the driving reliability of raising system.If (the side of increase boil-off gas compressor 30 Streamline, then it can reduce drive efficiency)
Here, it is 5bar to 6bar to preset pressure value, reliquefaction installation 37 uses nitrogen as refrigerant, second Pressure-reducing valve 342 can be Joule Thompson valve.
Gas handling system 1 according to embodiments of the present invention may include：Without other decompression just to low pressure requirements portion 22 The technology of supply；With when supplying liquid gas to high voltage demands portion 21, the technology of the submitting pressure of booster pump 40 can be reduced.
Gas handling system 1 according to embodiments of the present invention, mainly includes：Booster pump 40, it is to being stored in liquid gas Liquid gas in storage tank 10 carries out first time pressurization；High-pressure pump 41, liquefaction pressurized for the first time is received from booster pump 40 Gas simultaneously carries out second of pressurization to it；Gasifier 42, receive second of pressurized liquid gas from high-pressure pump 41 and make it Gasification；High voltage demands portion 21, the liquid gas of vaporized high pressure is received or from boil-off gas compressor 30 from gasifier 42 Receive pressurized boil-off gas and consumed；Low pressure requirements portion 22, receive and divided in the stage casing of boil-off gas compressor 30 Prop up and pressurize and consumed into the boil-off gas of low pressure；Forced gasification device 50, reception are stored in liquid gas storage tank 10 Liquid gas and make its forced gasification；And gas-liquid separator 51, be arranged at forced gasification device 50 and low pressure requirements portion 22 it Between and from forced gasification device 50 receive be forced gasification liquid gas and be separated into gaseous state and liquid.
Booster pump 40 is carried out first time pressurization to the liquid gas that is stored in liquid gas storage tank 10 and to High-pressure pump 41 or forced gasification device 50 supply, and thus, can share use to high-pressure pump 41 by booster pump 40 and force gas Change the pump that device 50 supplies.
Here, forced gasification device 50 receives from booster pump 40 is stored in liquid gas storage with state pressurized for the first time Liquid gas in tank 10 and the backward low pressure requirements portion 22 that is vaporized supplies, so as to just can be to without other decompression Low pressure requirements portion 22 supplies fuel.Thus, the present embodiment has the effect for flowing into end and setting pressure-reducing valve for omitting low pressure requirements portion 22 Fruit.
In addition, forced gasification device 50 receives from booster pump 40 is stored in liquid gas storage with state pressurized for the first time Liquid gas in tank 10 and can be supplied to the front end of boil-off gas compressor 30 after being vaporized.In the present embodiment, The required pressure in demand portion 20 is matched by boil-off gas compressor 30, therefore, there is the submitting that can reduce booster pump 40 The effect of pressure.Certainly, even if in this case, the booster pump 40 of the liquid gas supplied to high-pressure pump 41 can also be passed through To supply the liquid gas supplied to forced gasification device 50.
In this way, thus, had using the pump supplied to high-pressure pump 41 and forced gasification device 50 come shared by booster pump 40 Can reduce the effect of the structure expense of pump 40, and by make via forced gasification device 50 and be forced the boil-off gas of gasification to The front end of boil-off gas compressor 30 supplies, and the liquid gas reduced in liquid gas storage tank 10 sends out pressure, subtracts so as to have Few pump 40 drives the effect of electric power.
Gas handling system 1 according to embodiments of the present invention may include, at least shares more than one and each is arranged at liquid again Makeup put the line of return L10 of gas-liquid separator 35 of 37 rear ends, high-pressure pump 41 cooling circular route L13, be arranged at forced gasification The technology of the line of return (not shown) of the gas-liquid separator 51 of the rear end of device 50.
Gas handling system 1 according to embodiments of the present invention, mainly includes：Reliquefaction installation 37, it makes by boil-off gas The boil-off gas that compressor 30 compresses is re-liquefied；Gas-liquid separator 35, by by the re-liquefied boil-off gas point of reliquefaction installation 37 From into gaseous state and liquid；Gas-liquid separator 51, liquid gas is separated into gaseous state and liquid, the liquid gas is to being stored in High-pressure pump 41 that liquid gas in liquid gas storage tank 10 is pressurizeed and the pressure gas for being made liquid gas forced gasification Change the liquid gas of the forced gasification of device 50；Circular route L13 (the 13rd line) is cooled down, in the cooling of high-pressure pump 41 from high-pressure pump 41 It is connected to liquid gas storage tank 10；The line of return L10 (the tenth line) of gas-liquid separator 35, make the liquid of gas-liquid separator 35 to Liquid gas storage tank 10 returns；And the line of return (not shown) of gas-liquid separator 51, make the liquid of gas-liquid separator 51 to Liquid gas storage tank 10 returns.
In an embodiment of the present invention, in the cooling of high-pressure pump 41, can at least be shared it is more than one be used for from High-pressure pump 41 is returned to the line L13 of liquid gas storage tank 10, the liquid of gas-liquid separator 35 is returned to liquid gas storage The line L10 of tank 10 and the line that the liquid of gas-liquid separator 51 is returned to liquid gas storage tank 10.
In this way, cooling circular route L13, gas-liquid separator 35 by can at least be shared more than one high-pressure pump 41 Line of return L11 and gas-liquid separator 51 the line of return, and be changed into simplification with the structure of the tropic and improve system Driving reliability, and can stably realize the effect of return, and cooling can be previously-completed by the shared line returned, Thus, there is the effect being regasified while the boil-off gas for preventing liquid returns to liquid gas storage tank 10 Fruit.That is, there is the substantive effect for improving re-liquefied efficiency.
As one, in an embodiment of the present invention, the cooling circular route L13 and gas-liquid point of high-pressure pump 41 can be only shared From the line of return of device 35.
When carrying out driving high voltage demands portion 21 and boil-off gas by the liquid again of reliquefaction installation 37 by liquid gas simultaneously During change, the discharge pressure of gas-liquid separator 35, the i.e. pressure of line of return L10 is about the cooling circulation of 5~6bar, high-pressure pump 41 Line L13 is equivalent to about 9bar, so as in the case of line of return L10, produce inverse pressure and may occur to gas-liquid separator The problem of 35 adverse current.
But in an embodiment of the present invention, due to will not occur to carry out driving high pressure to need by liquid gas simultaneously Ask portion 21 situation and boil-off gas by the re-liquefied situation of reliquefaction installation 37, therefore, pass through the cold of only shared high-pressure pump 41 But the line of return of circular route L13 and gas-liquid separator 35 and can prevent that inverse pressure and the effectively shared line of return occur in common lines (37 powered situation of reliquefaction installation is to leave the situation of boil-off gas, in this case, due to passing through boil-off gas pressure Contracting machine 30 and the supply of an adequate amount of boil-off gas is carried out to high voltage demands portion 21, it is therefore not necessary to by high-pressure pump 41 come Liquid gas is supplied to high voltage demands portion 21, so as to which 41 powered situation of high-pressure pump will not occur).
In the embodiments of the invention as another, only all driven in high voltage demands portion 21 and low pressure requirements portion 22 The cooling circular route L13 of high-pressure pump 41 and the line of return of gas-liquid separator 51 can be shared in the case of dynamic.
Because forced gasification device 50 is only run in the case of low pressure requirements portion 22 is powered, high-pressure pump 41 only needs in high pressure Run in the case of asking portion 21 powered, therefore, can in the case of only being run in high pressure and low pressure requirements portion 21,22 The cooling circular route L13 of shared high-pressure pump 41 and the line of return of gas-liquid separator 51.
Thus, from the line of return of gas-liquid separator 51, liquid that is cooled and being returned to liquid gas storage tank 10 is led in advance Crossing the cooling of high-pressure pump 41 will not be regasified by gas-liquid separator 51, so as to effectively managing liquefied gas storage tanks 10 Internal pressure.Certainly, now, due to the line of return of gas-liquid separator 51 and the cooling circular route L13 of high-pressure pump 41 flow each other when Between put different, therefore, the problem of inverse pressure will not occur, (cooling of high-pressure pump 41 was only driven supply initial stage to high voltage demands portion 21 It is dynamic, and the line of return of gas-liquid separator 51 continues to be driven during supplying to low pressure requirements portion 22).
Gas handling system 1 according to embodiments of the present invention may include the front end and gas-liquid point by making forced gasification device 50 The line of return from device 51 is connected to simplify the technology of the cooling of the line of return of gas-liquid separator 51.
The gas handling system 1 of the embodiment of the present invention mainly includes：Gas-liquid separator 51, liquid gas will be made to force gas The liquid gas of the forced gasification of forced gasification device 50 of change is separated into gaseous state and liquid；The line of return of gas-liquid separator 51, makes gas The liquid of liquid/gas separator 51 returns to liquid gas storage tank 10；And bypass line (not shown), for connecting forced gasification device 50 front end and the line of return of gas-liquid separator 51.
Embodiments of the invention possess the bypass of the front end of connection forced gasification device 50 and the line of return of gas-liquid separator 51 Line, and the bypass line of forced gasification device 50 and the line of return of gas-liquid separator 51 can be shared together.
Thus, by the bypass line of forced gasification device 50 is connected with the line of return of gas-liquid separator 51 without with gas-liquid The front end of separator 51 connects, and can share the bypass function of forced gasification device 50 and the line of return cooling work(of gas-liquid separator 51 Can, so as to the cooling with simplification gas-liquid separator 51 and it is changed into the effect optimized.
The gas handling system 1 of the embodiment of the present invention may include to supply heat in the ethylene glycol water used into gasifier 42 During source, the technology of engine cooling water and steam is supplied in a manner of in parallel and serial.
Hereinafter, reference picture 2a to Fig. 2 c is illustrated.First to gasifier first embodiment and second embodiment 42a, 42b is illustrated together.
Fig. 2 a and Fig. 2 b are the concept maps of the gasification system in the gas handling system of the present invention.
The gasifier first embodiment and second embodiment 42a, 42b of gas handling system 1 according to embodiments of the present invention Including：Gasifier 424 (gasification heat exchanger), the liquid gas for making to be stored in liquid gas storage tank 10 by the heating agent that gasifies Gasification；First heat exchanger 4231 (gasification heating agent first feedway), makes gasification heating agent carry out heat exchange with engine cooling water； Second heat exchanger 4232 (gasification heating agent second feedway), to gasification heating agent supply thermal source；And circulating pump 422, make gas Change heating agent circulation, can be supplied to gasifier 424.
Specifically, the embodiment of the present invention gas handling system 1 gasifier first embodiment and second embodiment In 42a, 42b, gasification heating agent the first feedway 4231 and the second feedway of gasification heating agent 4232 can be with the heating agents that gasifies One feedway 4231, the order of the second feedway of gasification heating agent 4232 supply thermal source, more specifically, energy to gasification heating agent It is enough with circulating pump 422, the first feedway of gasification heating agent 4231, the second feedway of gasification heating agent 4232 sequential series or With the first feedway of heating agent 4231 that gasifies, circulating pump 422, gasification heating agent the second feedway 4232 sequential series.
, can be with here, for gasification the first feedway of heating agent 4231 and gasification heating agent the second feedway 4232 The first feedway of gasification heating agent 4231 is plate (Plate) mode, the second feedway of gasification heating agent 4232 is shell-and-tube (Shell＆Tube) it is different to be arranged to type by mode for two heat exchangers.Certainly, two heat exchangers can be with identical Plate (Plate) mode or shell-and-tube (Shell＆Tube) mode use.In addition, the second feedway of gasification heating agent 4232, Steam or seawater can be used as the thermal source to gasification heating agent supply.
In the gasifier first embodiment and second embodiment 42a, 42b of the gas handling system 1 of the embodiment of the present invention, Also include：First bypass line GBL1 (gasification heating agent first branch line), by connecting the first feedway of gasification heating agent 4231 Front-end and back-end, make via gasification the first feedway of heating agent 4231 gasification heating agent from gasification the first feedway of heating agent 4231 Rear end forward end bypass；Second bypass line GBL2 (gasification heating agent second branch line), is supplied by connecting gasification heating agent second The front-end and back-end of device 4232, make to supply from gasification heating agent second via the gasification heating agent of gasification the second feedway of heating agent 4232 Rear end forward end bypass to device 4232；Control unit 902, for controlling the first bypass line GBL1 or the second bypass line GBL2；And gasification heating agent storage tank 421, for storing the heating agent that gasifies.
When the gasification heating agent supplied to gasifier 424 for when presetting below temperature value, control unit 902 makes gasification heating agent First branch line GBL1 or gasification the second branch line of heating agent GBL2 is driven to be reheated to gasification heating agent.Set in advance herein Constant temperature angle value is 85 degree above freezing to 95 degree above freezing, and the second feedway of gasification heating agent 4232 can be subordinated to gasification heating agent first and supply The thermal source supply capacity of device 4231 and carry out supply thermal source.
Heating agent gasify described in gasifier first embodiment 42a to the gas handling system of one embodiment of the invention to add The process that the mode of hot/cold but circulates illustrates, and the gasification heating agent stored in the heating agent storage tank 421 that gasifies passes through heat of gasification Matchmaker's circulating pump 422 circulated and by the first feedway of gasification heating agent 4231 by engine cooling water (cooling jacket) heat and most Above freezing 70 can be heated to greatly, be fed into gasification heating agent the second feedway 4232 afterwards and by steam or heating of seawater and 85 to 95 degree (preferably 90 degree) above freezing can be heated to about, be fed into afterwards gasify heat exchanger 424 and can will be by the Subzero 130 degree of the liquid gas that one line L1 is flowed is heated to above freezing 35 to 55, and vaporised refrigerant can be from 90 degree of quilts above freezing It is cooled to above freezing 50.
Here, engine cooling water is supplied by the first feedway of gasification heating agent 4231, so as to the engine cooling water in heating Amount can change according to the driving of engine, therefore, when by driven at low speed, can reduce the thermal source quantity delivered of engine cooling water, from And gasify heating agent the second feedway 4232 can subordinate change and start heating in gasification the first feedway of heating agent 4231.This It can be realized by the driving of above-mentioned control unit 902, control unit 902 can be in wired or wireless manner from the first temperature Spend the temperature information that measurement apparatus 921 and second temperature measurement apparatus 922 receive liquid gas or the heating agent that gasifies, based on this, The first bypass line GBL1 or the second bypass line GBL2 can accordingly be driven and gasification heating agent is heated.
Heating agent gasify described in gasifier second embodiment 42b to the gas handling system 1 of the embodiment of the present invention to add The process that the mode of hot/cold but circulates illustrates, due to only changing the first feedway of gasification heating agent 4231 and heat of gasification The order of matchmaker's circulating pump 422, it is therefore, in addition identical with described in above-mentioned gasifier first embodiment 42a, so as to omit Its description.
Hereinafter, gasifier 3rd embodiment 42c is illustrated.
Fig. 2 c are the concept maps of the gasification system in the gas handling system of the present invention.
The gasifier 3rd embodiment 42c of gas handling system 1 according to embodiments of the present invention includes the (gas of heater 4233 Change heating agent and add heater), it is arranged at gasification heat exchanger 424, gasification heating agent the first feedway 4231, gasification heating agent the Two feedways 4232, circulating pump 422, the rear end of the first feedway of gasification heating agent 4231, to by the first feedway 4231 The heat of vaporization of heating carries out adding heating；Bypass line GBL4 (gasification heating agent the 3rd branch line), is arranged at gasification heating agent first and supplies To the rear end of device 4231, make to be supplied to gasification heating agent second by the gasification heating agent that the first feedway of heating agent 4231 that gasifies heats The front end supply of device 4232.
For gasification the first feedway of heating agent 4231 and the second feedway of gasification heating agent 4232, gasify heating agent first Feedway 4231 is in parallel with gasification heating agent the second feedway 4232, and the first feedway of gasification heating agent 4231 preferentially heats gas Change heating agent, the second feedway of gasification heating agent 4232 can further be heated to gasification heating agent, the gasification supply dress of heating agent first Put 4231 rear ends that circulating pump 422 is configured in the second feedway of gasification heating agent 4232.
Specifically, when the temperature for the rear end of the first feedway of heating agent 4231 of gasifying is presets below temperature, quilt Gasify the gasification heating agent that the first feedway of heating agent 4231 heats, and by heater 4233 come heating and gasifying heating agent, or can lead to Bypass line GBL4 is crossed to be supplied to the front end of gasification the second feedway of heating agent 4232.
Here, can be by the first feedway of heating agent 4231 that gasifies in a manner of plate (Plate), the gasification supply dress of heating agent second Put 4232 sets the type of two heat exchangers different for shell-and-tube (Shell＆Tube) mode, certainly, two heat exchanges Machine can also be in a manner of plate (Plate) or shell-and-tube (Shell＆Tube) mode uses.Gasify the supply dress of heating agent second Putting 4232 can use steam or seawater as the thermal source to gasification heating agent supply.
Heating agent gasify described in gasifier 3rd embodiment 42c to the gas handling system 1 of the embodiment of the present invention to add The hot/cold process that but mode circulates illustrates, and the gasification heating agent being stored in gasification heating agent storage tank 421 can pass through heat of gasification Matchmaker's circulating pump 422 is circulated and heated by the first feedway of heating agent 4231 that gasifies by engine cooling water (cooling jacket), Maximum can be heated to 90 degree.
But because the amount of engine cooling water can change according to the driving of engine, therefore, led by serious temperature change Cause is difficult to supply constant thermal source to gasification heat exchanger 424.In order to prevent such case, the present invention can also include heat of gasification Matchmaker adds heater 4233.When engine causes to reduce the thermal source quantity delivered of engine cooling water by driven at low speed, due to this hair It is bright that heater 4233 is added to be reheated, so as to be heated to 90 degree above freezing by the heating agent that gasifies.Afterwards, will can be supplied Be given to gasification heat exchanger 424 and by First Line L1 flow with subzero 130 degree of liquid gas be heated into above freezing 35 to 55, and vaporised refrigerant can be cooled to above freezing 50 from 90 degree above freezing.
Here, gasification heating agent the second feedway 4232 can subordinate change and opened in gasification the first feedway of heating agent 4231 Dynamic heating.This can realize that control unit 902 can be with wired or wireless side by the driving of above-mentioned control unit 902 Formula receives the temperature letter of liquid gas or the heating agent that gasifies from the first temperature measuring equipment 921 and second temperature measurement apparatus 922 Breath, based on this, drive the first bypass line GBL1 or the second bypass line GBL2 according to above-mentioned situation, thus, it is possible to heat gas Change heating agent.
In addition, the second feedway of gasification heating agent 4232, is causing engine cooling water because the driving of engine stops for a long time Even if supply be changed into it is considerably less so that with gasification heating agent add heater 4233 its heating amount it is also not abundant enough when, gasify heating agent Not to the gasification branch line GBL3 of heating agent the 3rd supplies to gasification heating agent circular route GL supplies, therefore can be by the heating medium for heating that gasifies To 90 degree above freezing.
Because the amount of engine cooling water can be according to engine in the gasifier 3rd embodiment 42c of one embodiment of the invention Drive and change, therefore, when being reduced the thermal source quantity delivered of engine cooling water by driven at low speed, pass through the 4th point of the heating agent that gasifies Branch line GBL4 and bypassed to gasification the second feedway of heating agent 4232, and can be heated by the second feedway of gasification heating agent 4232 To 90 degree above freezing.
In this way, by the heating technique with gasification heating agent in parallel or in series of above-mentioned gasification heating agent feedway, simultaneously The flow of steam is reduced by engine cooling water, and boiler operatiopn can be reduced, therefore, it is possible to reduce fuel consumption, and is had The effect of the driving reliability of gasifier 42 is improved by series or in parallel.
Gas handling system 1 according to embodiments of the present invention may include to be deposited according to liquid gas to realize by driving side by side The internal pressure processing liquid gas of storage tank 10 and the technology of boil-off gas.
Gas handling system 1 according to embodiments of the present invention mainly includes：Boil-off gas compressor 30, it is arranged to simultaneously Row；Liquid gas processing unit 40,41,42, pressurization and/or heating is carried out to the liquid gas being stored in liquid gas storage tank 10 And supplied to demand portion；Reliquefaction installation 37, make the boil-off gas that is compressed by boil-off gas compressor 30 re-liquefied；Second decompression Valve 342, the rear end of reliquefaction installation 37 is arranged at, makes to be depressurized or expanded by 37 liquefied boil-off gas of reliquefaction installation；Gas Body burner 23, for consuming boil-off gas；And forced gasification device 50, make the liquid being stored in liquid gas storage tank 10 Change gas forced gasification.
Here, liquid gas processing unit 40,41,42 includes：Booster pump 40, it is to being stored in liquid gas storage tank 10 In liquid gas carry out first time pressurization；High-pressure pump 41, receive pressurized liquid gas from booster pump 40 and it is carried out Second of pressurization；And gasifier 42, pressurization is received into the liquid gas of high pressure from high-pressure pump 41 and is vaporized, boil-off gas Compressor 30 is arranged to be configured to the first boil-off gas compressor (not shown) and the second boil-off gas compressor (is not schemed side by side Show).
Hereinafter, the first driving arranged side by side to the gas handling system 1 of the internal pressure according to liquid gas storage tank 10 is said It is bright.
First to preset pressure be to have boil-off gas (BOG inside the liquid gas storage tank 10：Boil off Gas the internal pressure of the liquid gas storage tank 10 when amount) is 75% to 85%, second, which presets pressure, can be more than first Preset pressure and be less than 1.12bar, the 3rd, which presets pressure, is smaller than first and presets pressure and be more than 1.06bar, the 4th, which presets pressure, is smaller than the 3rd and presets pressure and be more than 1.03bar.
First, the first boil-off gas compressor is driven substantially.When the internal pressure of liquid gas storage tank 10 is advance for first When setting more than pressure, the second boil-off gas compressor of additional driving, when the internal pressure of liquid gas storage tank 10 is pre- less than first When first setting pressure, additional driving liquid gas processing unit 40,41,42.
For the caused boil-off gas in liquid gas storage tank 10, when the internal pressure of liquid gas storage tank 10 is the Two when presetting more than pressure, reliquefaction installation 37 or gas combustion apparatus 23 can be fed into, when liquid gas is deposited The internal pressure of storage tank 10 is second to preset more than pressure along with the fuel aequum in demand portion 20 is presets aequum During the above, liquid gas processing unit 40,41,42 can be added driving.
In addition, when the internal pressure of liquid gas storage tank 10 presets pressure less than the 3rd, the first boil-off gas can be stopped The driving of gas compressor, when the internal pressure of liquid gas storage tank 10 presets pressure less than the 4th, pass through forced gasification device 50 Carry out the liquid gas that forced gasification is stored in liquid gas storage tank 10, and the liquid gas for making to be forced gasification returns again The internal pressure of liquid gas storage tank 10 is improved to liquid gas storage tank 10.
Now, the embodiment of the present invention can also include：Device for pressure measurement (not shown), (do not scheme for measuring control unit Show) and liquid gas storage tank 10 internal pressure；Measuring device needed for fuel (not shown), the fuel for measurement demand portion 20 Aequum, control unit, in wired or wireless manner from measuring device receive information needed for device for pressure measurement and fuel And to presetting pressure to the interior buckling of the 4th above-mentioned liquid gas storage tank 10 for presetting pressure according to described first Change, can control liquid gas processing unit 40,41,42 and boil-off gas compressor 30.
In this way, embodiments of the invention, drive side by side boil-off gas compressor 30 and liquid gas processing unit 40,41, 42, thus, even without the supply of oil, the driving in demand portion 20 also can be flexibly realized, thus, have and reduce the component of a system The effect of cost.
Gas handling system 1 according to embodiments of the present invention may include：It is low pressure in the internal pressure of liquid gas storage tank 10 When, driving side by side is flowed through to realize the processing of liquid gas and boil-off gas and oil according to its internal pressure.
Gas handling system 1 according to embodiments of the present invention mainly includes：Boil-off gas compressor 30；Reliquefaction installation 37；Liquid gas processing unit 40,41,42；Second pressure-reducing valve 342；And oil treatment provisions (not shown), for demand portion 20 supplies are stored in the oil in oily storage tank (not shown).
Hereinafter, the second driving arranged side by side to the gas handling system 1 of the internal pressure according to liquid gas storage tank 10 is said It is bright.
When first presets pressure, boil-off gas compressor 30 is driven substantially, when in liquid gas storage tank 10 When the amount of caused boil-off gas is more than the fuel aequum in demand portion 20, additional operation reliquefaction installation 37, when in liquefied gas When the amount of caused boil-off gas is less than the fuel aequum in demand portion 20 in body storage tank 10, liquid gas processing unit 40, 41st, 42 and oil treatment provisions can be added driving.Preferably, liquid gas processing unit 40,41,42 can be preferentially run, its Secondary operation oil treatment provisions.
Here, first to preset pressure can be boil-off gas (BOR in liquid gas storage tank 10：Boiled Off Rate) be 75% to 85% when liquid gas storage tank 10 internal pressure or can be 1.06bar to 1.12bar.
Now, control unit in embodiments of the present invention, can in a wired or wireless manner from device for pressure measurement and Measuring device receive information needed for fuel and the liquid gas storage tank for presetting pressure according to described first 10 internal pressure change, control liquid gas processing unit 40,41,42, boil-off gas compressor 30 and oil treatment provisions.
In this way, the embodiment of the present invention by drive side by side boil-off gas compressor 30, liquid gas processing unit 40,41, 42 and oil treatment provisions, the stability of the fuel supply of system is disclosure satisfy that, so as to the driving reliability with raising system Effect.
The gas handling system 1 of the embodiment of the present invention may include, when the internal pressure of liquid gas storage tank 10 is high pressure, root Driving side by side is flowed through to realize processing liquid gas and the technology of boil-off gas and oil according to its internal pressure.
Gas handling system 1 according to embodiments of the present invention can mainly include, the boil-off gas compressor 30 being set up in parallel With reliquefaction installation 37.Here, boil-off gas compressor 30 is arranged to side by side, and can possess the first boil-off gas compressor (not Illustrate reference) and the second boil-off gas compressor (reference not shown).
Hereinafter, the control driving to the gas handling system 1 of the internal pressure based on liquid gas storage tank 10 illustrates.
When the internal pressure of liquid gas storage tank 10 is presets more than pressure, the first boil-off gas compressor of operation comes Supplied to demand portion 20, when the caused boil-off gas scale of construction is more than the fuel institute in demand portion 20 in liquid gas storage tank 10 During requirement, the second boil-off gas compressor of operation reliquefaction installation 37 or additional operation can be added.Preferably, can be by excellent The second boil-off gas compressor is first run to be supplied to demand portion 20, thus, makes the increase of ship ship's speed, and can secondly transport Row reliquefaction installation 37.Now, it can be 1.11bar to 1.13bar to preset pressure.
In this way, embodiments of the invention, by driving boil-off gas compressor 30 and additional driving reliquefaction installation side by side 37 effectively handle the boil-off gas persistently discharged from liquid gas storage tank 10, so as to can stabilize liquid gas The effect of the internal pressure of storage tank 10.
More than, it is described in detail by the specific embodiment of the present invention, but this is to illustrate this hair Bright, the present invention is not limited to this, and those of ordinary skill in the art can deform in the technological thought of the present invention to it Or improvement is obvious
Simple deformation or change to the present invention belong to scope of the invention, specific protection domain meeting of the invention By claims of the present invention come clearly.

Claims (9)

  1. A kind of 1. ship including gas handling system, it is characterised in that including：
    Liquid gas storage tank, for storing liquid gas；
    Boil-off gas compressor, for supplying the boil-off gas of the liquid gas storage tank to demand portion；
    Reliquefaction installation, to passing through remaining boil-off gas of the boil-off gas compressor without being fed into the demand portion Body is liquefied；And
    Control unit, by the liquid gas storage tank for it is safe when internal pressure be referred to as normally-pressured neighbor when, when the liquefied gas The internal pressure of body storage tank reach in the normally-pressured neighbor first when presetting more than pressure, provide request to user The prompting that the reliquefaction installation starts.
  2. 2. the ship according to claim 1 including gas handling system, it is characterised in that
    Also include：
    Pump, for supplying the liquid gas being stored in the liquid gas storage tank to the demand portion,
    When the internal pressure of the liquid gas storage tank reach in the normally-pressured neighbor first preset pressure when, it is described Control unit provides request by the pump come the prompting to demand portion supply liquid gas to the user.
  3. 3. the ship according to claim 2 including gas handling system, it is characterised in that
    The boil-off gas compressor includes：
    Main compressor, the liquid gas storage tank internal pressure in the normally-pressured neighbor in the case of run all the time； And
    Auxiliary compressor, second that the internal pressure of the liquid gas storage tank reaches in the normally-pressured neighbor preset pressure During power, it is determined whether operation,
    When the internal pressure of the liquid gas storage tank reach in the normally-pressured neighbor second preset pressure when, it is described Control unit to the user provide request by the auxiliary compressor to the demand portion supply boil-off gas prompting with Request stops supplying the prompting of liquid gas to the demand portion by the pump.
  4. 4. the ship according to claim 3 including gas handling system, it is characterised in that
    The control unit, including when the internal pressure of the liquid gas storage tank reaches in the normally-pressured neighbor the 3rd advance When setting pressure, the control unit for the prompting for asking the reliquefaction installation to start is provided to the user.
  5. 5. the ship according to claim 4 including gas handling system, it is characterised in that
    When the internal pressure of the liquid gas storage tank reach in the normally-pressured neighbor the 4th preset pressure when, it is described Control unit provides to the user asks to stop the prompting for supplying liquid gas to the demand portion by the pump again.
  6. 6. the ship according to claim 1 including gas handling system, it is characterised in that
    Also include：
    Gas combustion apparatus, the high pressure limit of normally-pressured neighbor described in the inner pressure ratio of the liquid gas storage tank is referred to as During the first dangerous pressure scope, situation about being pressed in the liquid gas storage tank in the range of first dangerous pressure Under, the gas combustion apparatus is run.
  7. 7. the ship according to claim 6 including gas handling system, it is characterised in that
    Also include：
    The mast valve of bending, by the high pressure limit of the first dangerous pressure scope described in the inner pressure ratio of the liquid gas storage tank During referred to as the second dangerous pressure scope, the feelings that are pressed in the liquid gas storage tank in the range of second dangerous pressure Under condition, the mast valve of the bending is opened.
  8. 8. the ship according to claim 7 including gas handling system, it is characterised in that
    Also include：
    Safety valve, pressure limit when the second dangerous pressure scope is high described in the inner pressure ratio of the liquid gas storage tank is referred to as During the 3rd dangerous pressure scope, situation about being pressed in the liquid gas storage tank in the range of the 3rd dangerous pressure Under, the safety valve is opened.
  9. 9. the ship according to claim 1 including gas handling system, it is characterised in that also include：
    Pump, for the liquid gas being stored in demand portion supply in the liquid gas storage tank；And
    Fluid supply apparatus, for supplying oil to the demand portion,
    The low pressure limit of normally-pressured neighbor described in the inner pressure ratio of the liquid gas storage tank is referred to as the 4th dangerous pressure During scope, in the case of being pressed in the liquid gas storage tank in the range of the 4th dangerous pressure, the demand portion It will not receive the liquid gas or the boil-off gas from the boil-off gas compressor and the pump, but from the oil Feedway receives the oil.
CN201680033518.2A 2015-06-09 2016-06-09 Ship comprising a gas treatment system Active CN107709150B (en)

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KR1020160038671A KR102179194B1 (en) 2015-06-09 2016-03-30 Vessel having Gas Treatment System
KR10-2016-0038671 2016-03-30
PCT/KR2016/006132 WO2016200181A1 (en) 2015-06-09 2016-06-09 Ship including gas treatment system

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CN202010381729.3A Active CN111535944B (en) 2015-06-09 2016-06-09 Ship comprising a gas treatment system
CN201680033514.4A Active CN107709746B (en) 2015-06-09 2016-06-09 Ship comprising a gas treatment system
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CN201680033502.1A Active CN107690549B (en) 2015-06-09 2016-06-09 Ship comprising a gas treatment system

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