CN108975438A - A kind of LNG Power Vessel LNG is regasified and fresh water preparation system and method - Google Patents
A kind of LNG Power Vessel LNG is regasified and fresh water preparation system and method Download PDFInfo
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- CN108975438A CN108975438A CN201810831956.4A CN201810831956A CN108975438A CN 108975438 A CN108975438 A CN 108975438A CN 201810831956 A CN201810831956 A CN 201810831956A CN 108975438 A CN108975438 A CN 108975438A
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- lng
- fresh water
- seawater
- pipeline
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/22—Treatment of water, waste water, or sewage by freezing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J1/00—Arrangements of installations for producing fresh water, e.g. by evaporation and condensation of sea water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
Abstract
It is regasified the invention discloses a kind of LNG Power Vessel LNG and fresh water preparation system and method, system includes LNG regas system, fresh water preparation system.The LNG regas system is successively made up of the fuel inlet m of fluid reservoir, booster pump, cryogenic heat exchanger, condensing heat exchanger, host pipeline connection；The fresh water preparation system, including freezing freshwater production system, flash method freshwater production system and evaporation freshwater production system.The present invention by LNG regasify and NG burning after waste heat removal process and seawater prepare fresh water process and organically combine, the cold energy discharged during being regasified using LNG and the thermal energy for regasifying rear NG burning release prepare fresh water, realize step and the comprehensive utilization of LNG energy, reduce the pollution of the cold energy and thermal energy of the discharge of LNG Power Vessel to environment to the maximum extent, LNG Power Vessel total energy approach efficiency has been significantly increased.
Description
Technical field
It is regasified the present invention relates to a kind of LNG Power Vessel LNG and fresh water preparation system and its working method, it is dynamic to belong to LNG
Power ship LNG gasification and LNG Power Vessel fresh water preparation field.
Background technique
There are mainly two types of the modes of LNG cold energy use, and one is directly utilizing, another kind is indirect utilization, in LNG gasification
In the process, the cryogenic energy of 870kJ/kg can be about generated, therefore fuel includes huge before being sent into host computer on LNG Power Vessel
Cold energy.Huge cold energy when this system first has to rationally regasify using LNG, and then consider how sophisticated systems waste heat
It rationally utilizes, under the premise of guaranteeing that system energy is stablized, improves the comprehensive utilization ratio of system.
Number of patent application are as follows: 201621062958.4, title are as follows: a kind of cold energy utilization system of LNG Power Vessel, it is main
It to include Rankine cycle electricity generation system, the marine air conditioning circulatory system, the sea water desalination circulatory system, boat low-temperature freezer cyclic system
System, the ship high temperature freezer circulatory system and jacket-cooling water heating circulation system.The seawater desalination system includes: sea water desalination
Circulating refrigerant R601a, third working medium pump, third flow control valve, crystallizer, the 4th heat exchanger.In the sea water desalination circulatory system,
Refrigerant R601a is cooled to -45 DEG C by the 4th heat exchanger C4, is forced into 0.3MPa by third working medium pump C1 later, passes through
Three flow control valve C2 enter crystallizer C3 cooling supply, and refrigerant temperature rises to -20 DEG C, are then again introduced into the 4th heat exchanger C4 and change
Heat constitutes the sea water desalination circulatory system.The seawater desalination system carries out the exchange of cooling capacity in the second echelon of LNG cold energy use,
The sea water desalination circulatory system is only merely the circulatory system of refrigerant, does not elaborate on how to prepare fresh water；In the system
The heat that 80 degrees Celsius of jacket-cooling water has is not fully utilized；The high-temperature flue gas of tail portion reaches two or three
Hundred degrees Celsius, this partial heat is not also fully used, this greatly causes the waste of the energy.
Summary of the invention
The purpose of the present invention is provide a kind of LNG Power Vessel LNG for defect and problem existing for above-mentioned existing technology
It regasifies and fresh water preparation system and method.
The present invention using the LNG Power Vessel LNG huge cold energy discharged during regasifying and NG by rationally being fired
It burns discharged amount of heat and carrys out preparing fresh.LNG is cold from that will discharge a large amount of high-quality when being warming up to ignition temperature for -163 DEG C
Can, using cold energy, we can pass through freezing preparing fresh；The temperature that NG burning generates is higher than 100 DEG C of a large amount of high temperature cigarettes
Gas, using evaporation preparing fresh, had both reduced the discharge temperature of tail flue gas, and had also improved energy by this partial heat as heat source
The utilization rate in source；Using 80 DEG C or so of jacket-cooling water as heat source, flash method preparing fresh is used under conditions of vacuumizing,
Both it had played and has carried out cooling effect to jacket-cooling water, a large amount of thermal energy of jacket-cooling water is also made full use of to carry out preparing fresh.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of LNG Power Vessel LNG is regasified and fresh water preparation system, feature include: LNG regas system and fresh water system
Standby system, fresh water preparation system includes: freezing freshwater production system, flash method freshwater production system, evaporation freshwater production system；Its
Middle LNG regas system, successively by the fuel inlet of fluid reservoir 1, booster pump 2, cryogenic heat exchanger 4, condensing heat exchanger 5, host 6
M is connected to by pipeline and is constituted；Fresh water preparation system, wherein freezing freshwater production system, successively exports f by cryogenic heat exchanger 4, follows
Ring pump 7, the refrigerant inlet connector 8-1 of crystallizer 8, refrigerant exit connector 8-2,4 import e of cryogenic heat exchanger are connected to structure by pipeline
At wherein the ice crystal outlet connection 8-5 of the crystallizer 8 is connected to the import y of defroster 10 by pipeline, defroster 10 exports z
It is connected to fresh water collecting tank 28 by fresh water collecting general pipeline 27, the import r of the defroster 10 is connected to seawater general pipeline 26, defroster
10 outlet q is connected to the sea intake connector 8-3 of the crystallizer 8 by pipeline；The flash method freshwater production system, successively by
The jacket-cooling water of host 6 exports n, the jacket-cooling water inlet union 11-4 of flash vessel 11, jacket-cooling water outlet connection 11-
2,6 jacket-cooling water import o of host is connected to by pipeline and is constituted；The evaporation water supply threeway 23 being equipped with to seawater general pipeline 26
Outlet v2 be connected to the sea intake connector 11-5 of the flash vessel 11 by pipeline；The evaporation freshwater production system, according to
The secondary exhanst gas outlet p by host 6, the import x1 of flue gas threeway 21, outlet x2, evaporator 12 gas inlet connector 12-3, cigarette
Gas outlet connection 12-2 is connected to by pipeline；It is described to seawater general pipeline 26 be equipped with evaporation water supply threeway 24 outlet w2 also with
The sea intake connector 12-5 of the evaporator 12 is connected to by pipeline；The steam outlet joint 12-4 of the evaporator 12, it dodges
The steam outlet joint 11-3 of steam 11 is connected to 13 import j of condenser by pipeline, and condenser 13 exports k and successively connected by pipeline
Logical fresh water collecting pumps 16, fresh water collecting general pipeline 27；The concentrated seawater of the concentrated seawater outlet connection 8-4 of the crystallizer 8, flash vessel 11
Outlet connection 11-1, the concentrated seawater outlet connection 12-1 of evaporator 12, concentrated seawater emptying pump 20 successively with concentrated seawater discharge manifold
25 connections；The cryogenic heat exchanger 4 exports refrigerant exit 8-2, the low-temperature heat exchange of f, 8 refrigerant inlet 8-1 of crystallizer, crystallizer 8
4 import f of device, which is sequentially connected in the circuit of composition, is filled with coolant media.
Further, low-temperature brake valve 3 is additionally provided on the pipeline between booster pump 2 and cryogenic heat exchanger 4.
Further, defroster 10 exports is additionally provided on the pipeline between the q and sea intake connector 8-3 of the crystallizer 8
Feed pump 14.
Further, electricity is additionally provided on the pipeline between the ice crystal outlet connection 8-5 of crystallizer 8 and the import y of defroster 10
Dynamic gate valve 9.
Further, to the import t for exporting s2 and condensing heat exchanger 5 for condensing threeway 22 on seawater general pipeline 26 by being equipped with
Between pipeline on be additionally provided with condenser pump 15.
Further, condenser 13 exports the fresh water collecting pump 16 for being additionally provided with and being connected between k and fresh water collecting general pipeline 27.
Further, it flashes and is additionally provided with flash distillation on the pipeline between the outlet v2 and sea intake connector 11-5 of water supply threeway 23
Feed pump 17.
Further, between the jacket-cooling water outlet connection 11-2 of flash vessel 11 and the jacket-cooling water import o of host 6
Jacket-cooling water circulating pump 18 is additionally provided on pipeline.
Further, it evaporates on the pipeline between the outlet w2 and sea intake connector 12-5 of evaporator 12 of water supply threeway 24
It is additionally provided with evaporation feed pump 19.
Further, any one of coolant media R134a, R407c, R410a, preferably R410a.
The working method includes following system: LNG regas system and fresh water preparation system；Fresh water preparation system wraps again
Include freezing freshwater production system, flash method freshwater production system, evaporation freshwater production system.
The working method of LNG regas system: -163 DEG C of liquified natural gas (LNG) enter booster pump 2 through increasing by fluid reservoir 1
Buckling is high temperature and pressure LNG, enters cryogenic heat exchanger 4 using low-temperature brake valve 3, carries out heat with refrigerant and exchanges, becomes gaseous state
Natural gas (NG) its temperature is close to 0 DEG C, and then NG enters back into condensing heat exchanger 5 and exchanges with the seawater of room temperature progress heat, finally
It burns into 6 combustion chamber of host, generates gas, provide power for ship；
The working method of freezing preparation freshwater system: LNG enters cryogenic heat exchanger 4 by booster pump 2 and low-temperature brake valve 3
It carries out heat with refrigerant to exchange, the refrigerant that temperature reduces is delivered to by circulating pump 7 by the refrigerant inlet connector 8-1 of crystallizer 8
8 inside of crystallizer carries out heat with seawater and exchanges, and then enters low-temperature heat exchange using the refrigerant exit connector 8-2 of crystallizer 8
Device 4 carries out heat with LNG and exchanges；20 DEG C of seawater is passed through to be entered in defroster 10 to seawater main pipe 26, with the heat of seawater
Ice crystal melts ice crystal, while ice crystal is also pre-chilled seawater, and precooled seawater passes through crystallizer 8 by feed pump 14 again
Sea intake connector 8-3 enters 8 inside of crystallizer and carries out exchanging for heat with refrigerant, crystallizes seawater, the ice crystal of generation passes through
Electric gate valve 9 enters defroster 10, using melting to ice crystal from the seawater to come to seawater general pipeline 26, will finally melt
Water be delivered to fresh water collecting tank 28, loop back and forth like this；
The working method of flash method preparation freshwater system: 80 DEG C or so jacket-cooling waters go out through the jacket-cooling water of host 6
Mouthful n, flash vessel 11 jacket-cooling water inlet union 11-4 enter in flash vessel 11, jacket-cooling water to inside flash vessel 11 into
Row heating, seawater enter flash vessel 11 by the sea intake connector 11-5 of flash vessel 11 by flash distillation feed pump 17, work as flash vessel
In 11 in vacuum state and when internal temperature is higher than 60 DEG C, part seawater will flash to water vapour, water vapour warp at this time
The steam outlet joint 11-3 of flash vessel 11 enters condenser 13 and is condensed, and the fresh water of condensation is finally delivered to fresh water collecting
Tank 28；
The working method of evaporation preparation freshwater system: the high-temperature flue gas (200 DEG C -300 DEG C) come out from host 6 passes through cigarette
Gas threeway 21 and gas inlet connector 12-3 enter in evaporator 12, carry out heat with the seawater in evaporator 12 and exchange, seawater
Sea intake connector 12-5 through evaporation water supply threeway 24, evaporation feed pump 19, evaporator 12 enters inside evaporator 12, works as steaming
When hair 12 internal temperature of device reaches evaporating temperature (100 DEG C), the part seawater in evaporator 12 will flash to water vapour, and water steams
Vapour is condensed through steam outlet joint 12-4 by pipeline to condenser 13, and the fresh water of permanent set is delivered to fresh water receipts
Collect tank 28.
The present invention mainly makes full use of the high-quality cold energy of low temperature LNG, and what is discharged when being regasified using LNG is a large amount of cold
It can carry out preparing fresh, the NG temperature for being gasificated into gas is still below ignition temperature, drops again using its cold energy to normal temperature seawater
Temperature processing makes the seawater to be cooled down as the cold source of flash distillation legal system fresh water and the condenser for evaporating legal system fresh water；Jacket-cooling water
There is a large amount of heat when flowing out cylinder sleeve, make full use of this partial heat come preparing fresh by flash method, combustion gas is in host
High-temp combustion will generate the high-temperature flue gas with high-quality heat, we make full use of this partial heat to make by evaporation
Fresh water is taken, the fresh water for finally producing each system is unified to collect storage.
Advantages of the present invention and beneficial effect
1, major function of the invention be LNG is regasified and NG burning after waste heat removal process and seawater prepare fresh water mistake
Journey organically combines, the huge cold energy discharged when being regasified using LNG, as the cold source of fresh water preparation system, and after regasifying
NG cooling processing is carried out to seawater, NG is finally sent into marine main engine dynamical system, then again to more than a large amount of flue gases of generation
Heat is recycled, to meet the needs of evaporation legal system fresh water is to heat；Jacket-cooling water is by marine main engine dynamical system to master
Machine cools down, and using the heat being absorbed into as the heat source of flash method preparing fresh.
2, the thermal energy of the cold energy that LNG is regasified and NG burning is rationally utilized in present system, solves LNG Power Vessel pair
The demand of fresh water also reduces the exhaust temperature of tail flue gas, so that the whole energy utilization rate of system obtains very big mention
Height realizes step and the comprehensive utilization of LNG energy, reduces the cold energy and thermal energy of the discharge of LNG Power Vessel to the maximum extent
Loss, has been significantly increased LNG Power Vessel total energy approach efficiency.
Detailed description of the invention
Fig. 1 is schematic illustration of the embodiment of the present invention.
In figure: 1.LNG fluid reservoir, 2. booster pumps, 3. low-temperature brake valves, 4. cryogenic heat exchangers, 5. condensing heat exchangers, 6. is main
Machine, 7. circulating pumps, 8. crystallizers, 8-1. refrigerant inlet connector, 8-2. refrigerant exit connector, 8-3. sea intake connector, 8-4.
Concentrated seawater outlet connection, 8-5. ice crystal outlet connection, 9. electric gate valves, 10. defrosters, 11. flash vessels, 11-1. concentrated seawater go out
Mouth connector, 11-2. jacket-cooling water outlet connection, 11-3. steam outlet joint, 11-4. jacket-cooling water inlet union, 11-
5. sea intake connector, 12. evaporators, 12-1. concentrated seawater outlet connection, 12-2. exhanst gas outlet connector, 12-3. gas inlet
Connector, 12-4. steam outlet joint, 12-5. sea intake connector, 13. condensers, 14. feed pumps, 15. condenser pumps, 16. is light
Water collecting pump, 17. flash distillation feed pumps, 18. jacket-cooling water circulating pumps, 19. evaporation feed pumps, 20. concentrated seawater emptying pumps, 21.
Flue gas threeway, 22. condensation threeways, 23. flash distillation water supply threeways, 24. evaporation water supply threeways, 25. concentrated seawater discharge manifolds, 26. give
Seawater general pipeline, 27. fresh water collecting general pipeline, 28. fresh water collecting tanks, 29. fresh water feed pumps, 30. give fresh water gate valve,
Specific embodiment
Invention is described in further detail below with reference to Fig. 1 and specific embodiment.
A kind of LNG Power Vessel LNG of the invention is regasified and fresh water preparation system as shown in Figure 1:, including LNG is regasified
System and fresh water preparation system；Fresh water preparation system includes freezing freshwater production system, flash method freshwater production system, evaporation again
Freshwater production system.The LNG regas system, successively by fluid reservoir 1, booster pump 2, low-temperature brake valve 3, cryogenic heat exchanger 4, condensation
Heat exchanger 5, host 6 fuel inlet m pass through pipeline connection constitute；Fresh water preparation system, wherein freezing legal system fresh water system
System successively exports f, circulating pump 7, the refrigerant inlet connector 8-1 of crystallizer 8, refrigerant exit connector 8-2, low by cryogenic heat exchanger 4
Warm 4 import e of heat exchanger is connected to by pipeline and is constituted；The ice crystal outlet connection 8-5 of the crystallizer 8 is connected to defroster by pipeline
10 import y, defroster 10 export z and are connected to fresh water collecting tank 28,10 import r of the defroster connection by fresh water collecting general pipeline 27
To seawater general pipeline 26, defroster 10 exports the sea intake connector 8-3 that q is connected to crystallizer 8 by pipeline；The flash distillation legal system is light
Water system, it is successively cooling by jacket-cooling water outlet n, the jacket-cooling water inlet union 11-4 of flash vessel 11, the cylinder sleeve of host 6
Water out connector 11-2, jacket-cooling water circulating pump 18,6 jacket-cooling water import o of host are connected to by pipeline and are constituted；It is described to give
Pipe between the outlet v2 and sea intake connector 11-5 of flash vessel 11 for the flash distillation water supply threeway 23 that seawater general pipeline 26 is equipped with
Flash distillation feed pump is also communicated on road；The evaporation freshwater production system, successively by the exhanst gas outlet p of host 6, flue gas threeway 20
Import x1, outlet x2, evaporator 12 gas inlet connector 12-3, exhanst gas outlet connector 12-2 by pipeline connection；It is described
To between the outlet w2 and sea intake connector 12-5 of evaporator 12 of the evaporation water supply threeway 24 being equipped with of seawater general pipeline 26
Evaporation feed pump 19 is also communicated on pipeline；The steam (vapor) outlet of the steam outlet joint 12-4 of the evaporator 12, flash vessel 11
Connector 11-3 by pipeline be connected to 13 import j of condenser, condenser 13 export k by pipeline be sequentially communicated fresh water collecting pump 16,
Fresh water collecting general pipeline 27；The concentrated seawater outlet connection 8-4 of the crystallizer 8, the concentrated seawater outlet connection 11-1 of flash vessel 11, steaming
Concentrated seawater outlet connection 12-1, the concentrated seawater emptying pump 20 of hair device 12 are successively connected with concentrated seawater discharge manifold 25.It is described low
Warm heat exchanger 4 exports f, 8 refrigerant inlet 8-1 of crystallizer, 8 refrigerant exit 8-2 of crystallizer, 4 import f of cryogenic heat exchanger and is sequentially connected
Coolant media is filled in the circuit of composition.
Working method:
The method that LNG is regasified: -163 DEG C of liquified natural gas (LNG), which enter booster pump 2 from fluid reservoir 1, becomes high through pressurization
Warm high pressure LNG enters cryogenic heat exchanger 4 using low-temperature brake valve 3, is sufficiently exchanged heat with refrigerant, and liquified natural gas (LNG) becomes
At gaseous natural gas (NG), temperature is close to 0 DEG C, and then NG enters back into condensing heat exchanger 5 and the seawater of room temperature carries out heat friendship
It changes, finally enters 6 combustion chamber of host and burn, generate gas, provide power for ship；
Freezing prepares the working method of fresh water: LNG enters through booster pump 2 and low-temperature brake valve 3 low out by fluid reservoir 1
Warm heat exchanger 4 carries out heat with refrigerant and exchanges, and the refrigerant that temperature reduces is passed through the refrigerant inlet connector of crystallizer 8 by circulating pump 7
8-1 is delivered to 8 inside of crystallizer and exchanges with seawater progress heat, then enters using the refrigerant exit connector 8-2 of crystallizer 8
Cryogenic heat exchanger 4 carries out heat with LNG and exchanges；20 DEG C of seawater is passed through to be entered in defroster 10 to seawater main pipe 26, with seawater
Heat ice crystal melts ice crystal, while ice crystal is also pre-chilled seawater, and precooled seawater is passed through by feed pump 14 again
The sea intake connector 8-3 of crystallizer 8 enters 8 inside of crystallizer and exchanges with refrigerant progress heat, crystallizes seawater, the ice of generation
Crystalline substance enters defroster 10 by electric gate valve 9, melts using from the seawater to come to seawater general pipeline 26 to ice crystal, finally will
Water after thawing is delivered to fresh water collecting tank 28, loops back and forth like this；
Flash method prepares the working method of fresh water: jacket-cooling water outlet n of 80 DEG C or so the jacket-cooling waters through host 6,
The jacket-cooling water inlet union 11-4 of flash vessel 11 enters in flash vessel 11, and jacket-cooling water inside flash vessel 11 to adding
Heat, seawater enters flash vessel 11 by the sea intake connector 11-5 of flash vessel 11 by flash distillation feed pump 17, when in flash vessel 11
In vacuum state and when internal temperature is higher than 60 DEG C, part seawater will flash to water vapour at this time, and water vapour is through flashing
The steam outlet joint 11-3 of device 11 enters condenser 13 and is condensed, and the fresh water of condensation is finally delivered to fresh water collecting tank
28；
Evaporation prepares the working method of fresh water: (200 DEG C -300 DEG C) of high-temperature flue gas come out from host 6 pass through flue gas three
Logical 21 and gas inlet connector 12-3 enters in evaporator 12, and high-temperature flue gas heats 12 inner space of evaporator, seawater
Sea intake connector 12-5 through evaporation water supply threeway 24, evaporation feed pump 19, evaporator 12 enters inside evaporator 12, works as steaming
When temperature reaches evaporating temperature (100 DEG C) in hair device 12, the part seawater in evaporator 12 will flash to water vapour, water vapour
It is condensed through steam outlet joint 12-4 by pipeline to condenser 13, the fresh water of condensation is finally delivered to fresh water and is received
Collect tank 28.
In addition to the implementation, the present invention can also have other implementation methods, all to use equivalent substitution or equivalent transformation shape
At technical solution, all fall within the present invention claims invention scope in.
Claims (10)
1. a kind of LNG Power Vessel LNG is regasified and fresh water preparation system, including LNG regas system and fresh water preparation system；Its
It is characterized in that, the LNG regas system, successively by fluid reservoir (1), booster pump (2), cryogenic heat exchanger (4), condensing heat exchanger
(5), the fuel inlet m of host (6) is connected to by pipeline and is constituted；The fresh water preparation system, including freezing freshwater production system,
Flash method freshwater production system and evaporation freshwater production system, wherein the freezing freshwater production system, successively by cryogenic heat exchanger
(4) f, circulating pump (7), the refrigerant inlet connector (8-1) of crystallizer (8), refrigerant exit connector (8-2), cryogenic heat exchanger are exported
(4) import e is connected to by pipeline and is constituted, wherein the ice crystal outlet connection (8-5) of the crystallizer (8) is connected to ice-melt by pipeline
Device (10) import y, defroster (10) export z and pass through fresh water collecting general pipeline (27) connection fresh water collecting tank (28), the defroster
(10) import r, which is connected to, to be given seawater general pipeline (26), and the outlet q of defroster (10) is connected to the sea of the crystallizer (8) by pipeline
Water inlet connector (8-3)；The flash method freshwater production system successively exports n, flash vessel by the jacket-cooling water of host (6)
(11) jacket-cooling water inlet union (11-4), jacket-cooling water outlet connection (11-2), host (6) jacket-cooling water import
O is connected to by pipeline and is constituted；The outlet v2 of the flash distillation water supply threeway (23) being equipped with to seawater general pipeline (26) and the sudden strain of a muscle
The sea intake connector (11-5) of steaming device (11) is connected to by pipeline；The evaporation freshwater production system, successively by host (6) cigarette
Gas outlet p, flue gas threeway (21) import x1, outlet x2, evaporator (12) gas inlet connector (12-3), exhanst gas outlet connect
Head (12-2) is connected to by pipeline；The outlet w2 of the evaporation water supply threeway (24) being equipped with to seawater general pipeline (26) also with institute
The sea intake connector (12-5) for stating evaporator (12) is connected to by pipeline；Steam outlet joint (the 12- of the evaporator (12)
4), the steam outlet joint (11-3) of flash vessel (11) is connected to condenser (13) import j by pipeline, and condenser (13) exports k
Fresh water collecting, which is sequentially communicated, by pipeline pumps (16), fresh water collecting general pipeline (27)；The concentrated seawater outlet connection of the crystallizer (8)
Concentrated seawater outlet connection (11-1), the concentrated seawater outlet connection (12-1) of evaporator (12), dense sea of (8-4), flash vessel (11)
Water emptying pump (20) is successively connected with concentrated seawater discharge manifold (25)；The cryogenic heat exchanger (4) outlet f, crystallizer (8)
Refrigerant inlet (8-1), the refrigerant exit (8-2) of crystallizer (8), cryogenic heat exchanger (4) import f are sequentially connected in the circuit of composition
It is filled with coolant media.
2. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: described
Low-temperature brake valve (3) are additionally provided on pipeline between booster pump (2) and the cryogenic heat exchanger (4).
3. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: described
Feed pump is additionally provided on pipeline between defroster (10) outlet q and the sea intake connector (8-3) of the crystallizer (8)
(14)。
4. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: described
Electric gate valve is additionally provided on pipeline between the ice crystal outlet connection (8-5) of crystallizer (8) and the import y of the defroster (10)
(9)。
5. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: it is described
To on seawater general pipeline (26) by between the outlet s2 of condensation threeway (22) and the import t of the condensing heat exchanger (5) that are equipped with
Pipeline on be additionally provided with condenser pump (15).
6. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: it is described
The fresh water collecting pump (16) being connected is additionally provided between condenser (13) outlet k and fresh water collecting general pipeline (27).
7. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: it is described
Flash distillation feed pump (17) is additionally provided on pipeline between flash distillation water supply threeway (23) outlet v2 and sea intake connector (11-5)；Institute
State the pipe between the jacket-cooling water outlet connection (11-2) of flash vessel (11) and the jacket-cooling water import o of the host (6)
Jacket-cooling water circulating pump (18) are additionally provided on road.
8. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: described
It evaporates and is also set on the pipeline between the outlet w2 of water supply threeway (24) and the sea intake connector (12-5) of the evaporator (12)
There are evaporation feed pump (19).
9. a kind of LNG Power Vessel LNG according to claim 1 is regasified and fresh water preparation system, it is characterised in that: described
Coolant media is any one of R134a, R407c, R410a.
It is regasified using a kind of LNG Power Vessel LNG described in claim 1 to 9 any one and fresh water preparation system 10. a kind of
Carry out the method that LNG is regasified and prepared by fresh water, it is characterised in that: including following four method:
(1) method that LNG is regasified: liquified natural gas (LNG) enters booster pump (2) by fluid reservoir (1), using low-temperature brake valve
(3) it is exchanged into cryogenic heat exchanger (4) with refrigerant progress heat and becomes gaseous natural gas (NG), then NG enters back into condensing heat-exchange
Device (5) carries out heat with the seawater of room temperature and exchanges, and finally enters host (6) combustion chamber and burns, generates gas, mention for ship
For power；
(2) freezing prepares the working method of fresh water: LNG enters cryogenic heat exchanger by booster pump (2) and low-temperature brake valve (3)
(4) it carries out heat with refrigerant to exchange, the refrigerant that temperature reduces is passed through the refrigerant inlet connector (8- of crystallizer (8) by circulating pump (7)
1) it is delivered to crystallizer (8) inside to exchange with seawater progress heat, then using the refrigerant exit connector (8- of crystallizer (8)
2) enter cryogenic heat exchanger (4) to exchange with LNG progress heat；Seawater passes through, use inner into defroster (10) to seawater main pipe (26)
The heat ice crystal of seawater melts ice crystal, while ice crystal is also pre-chilled seawater, and precooled seawater is again by feed pump
(14) crystallizer (8) inside is entered by the sea intake connector (8-3) of crystallizer (8) and carries out exchanging for heat with refrigerant, made
Seawater crystallization, the ice crystal of generation enter defroster (10) by electric gate valve (9), using from the sea to come to seawater general pipeline (26)
Water melts ice crystal, and the water after thawing is finally delivered to fresh water collecting tank (28), is looped back and forth like this；
(3) method that flash method prepares fresh water: jacket-cooling water outlet n, flash vessel (11) of the jacket-cooling water through host (6)
Jacket-cooling water inlet union (11-4) enters in flash vessel (11), and jacket-cooling water is internally heated flash vessel (11),
Seawater enters flash vessel (11) by the sea intake connector (11-5) of flash vessel (11) by flash distillation feed pump (17), works as flash vessel
(11) in vacuum state and when internal temperature is higher than 60 DEG C, part seawater will flash to water vapour, water vapour at this time
Steam outlet joint (11-3) through flash vessel (11) enters condenser (13) and is condensed, and is finally delivered to the fresh water of condensation
Fresh water collecting tank (28)；
(4) method that evaporation prepares fresh water: the high-temperature flue gas come out from host (6) enters evaporator by flue gas threeway (21)
(12) inner, high-temperature flue gas heats evaporator inner space, seawater of the seawater through evaporation feed pump (19), evaporator (12)
Inlet union (12-5) enters evaporator (12) inside, when evaporator (12) interior temperature reaches evaporating temperature, evaporator (12)
Interior part seawater will flash to water vapour, and water vapour is through steam outlet joint (12-4) by pipeline to condenser
(13) it is condensed, the fresh water of condensation is finally delivered to fresh water collecting tank (28).
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| CN109989828A (en) * | 2019-04-04 | 2019-07-09 | 东北大学 | A kind of LNG Power Vessel gas turbine low nitrogen burning system |
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| CN113309985A (en) * | 2021-06-15 | 2021-08-27 | 中国船舶工业集团公司第七0八研究所 | LNG fuel power ship cold energy waste heat comprehensive cascade utilization system with zero carbon emission |
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| CN114179975A (en) * | 2021-11-25 | 2022-03-15 | 江南造船(集团)有限责任公司 | Temperature control system, method and equipment for evaporator of liquefied gas carrier |
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