CN104595063B - Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat - Google Patents
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat Download PDFInfo
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- 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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The present invention discloses a kind of liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat, is made up of jacket-cooling water blood circulation, duplex matter system, LNG supply gasification system and these four subsystems of PLC control system；Jacket-cooling water blood circulation includes cylinder sleeve water pump, cooling water tank, LNG/ Diesel Dual-Fuel Engine, plate type heat exchanger and fan type radiating device；Duplex matter system includes working medium case, working medium pump, the working medium import by sender property outlet connecting plate type heat exchanger of the working medium case, LNG supply gasification system includes LNG pump, LNG gasification device and auxiliary LNG storage tank, and auxiliary LNG storage tank is connected with LNG gasification device through manual modulation valve, LNG pump, the 3rd liquid flow sensor, the 3rd liquid fraction regulation valve successively；The present invention utilizes the waste heat of the jacket water of LNG/ Diesel Dual-Fuel Engine to gasify LNG, to the cooling heat radiation of high temperature jacket water, improves again the efficiency of combustion of LNG/ Diesel Dual-Fuel Engine fuel simultaneously.
Description
Technical field
The present invention relates to the equipment and technology neck of used heat gasification LNG (Liquefied Natural Gas, liquified natural gas)
Territory, particularly relates to the LNG gasification system of a kind of LNG/ diesel dual-fuel ship engine cooling water waste heat.
Background technology
Compared with traditional diesel engine, LNG/ Diesel Dual-Fuel Engine has the advantages such as noxious emission is few, it is possible to meet
The emission regulation demands of increasingly stringent, is the dynamical system of a kind of green, is expected to be widely applied to boats and ships, urban transportation, generating
Unit and medium and heavy cargo vehicle etc..And liquid LNG at a temperature of-162 DEG C needs to be gasificated as before becoming engine fuel
Gaseous state, and every kilogram of LNG gasification needs to absorb 837kJ heat.Thus simultaneously, the effective thermal efficiency of conventional engines less than 50%,
Remaining heat of 25% is taken away by waste gas, and the heat of other 20% is taken away by jacket-cooling water, and residue 5% is then by heat radiation and profit
Lubricating oil is dispersed into air.
Publication number CN103899440A (publication date on 07 02nd, 2014) discloses a kind of based on exhaust energy recovery
Gas peculiar to vessel/dual fuel engine LNG gasification system and control methods, including heat transferring medium case, exhaust gas heat exchanger, radiator, send out
Motivation expansion tank, LNG gasification device, catch tray, the heat transferring medium in heat transferring medium case is entered by the first regulating flow quantity pump
Exhaust gas heat exchanger, enters LNG gasification device after radiator and flows back to heat transferring medium case again, and external water source passes through catch tray through three-way valve
Discharging after respectively enteing engine expansion water tank, radiator, the external water source entering radiator does not blends with heat transferring medium, i.e. presses
According to each self-corresponding tube runs.This technology is to be reclaimed by dual fuel engine exhaust waste heat, and for LNG gasification, but
It is not involved with the Waste Heat Recovery of jacket-cooling water.
The document of China Patent Publication No. CN103967648A (publication date on August 6th, 2014) provides a kind of boats and ships
Low-speed diesel engine waste heat comprehensive recovery system, including combination afterheat boiler system, power turbine electricity generation system, steam turbine power generation system
System, high-temperature cooling water utilize heat transmission equipment and organic working medium turbine generating system, cylinder wherein in parallel with jacket water heat exchanger
Set water organic working medium preheater, operationally, organic working medium enters mid temperature heat exchanger again after jacket water organic working medium preheater
Entering organic working medium vaporizer section, the organic working medium driving steam turbine electricity generation system of high pressure is used for generating electricity, by diesel cylinder sleeve water
Used heat be used for generate electricity.It is not involved with the gasification technology of LNG/ Diesel Dual-Fuel Engine and LNG, at present, has no relevant and return
Receive cooling water heat the technology report for the LNG that gasifies.
Summary of the invention
Present invention solves the technical problem that and be to provide one based on liquified natural gas/diesel dual-fuel ship engine cool
The liquified natural gas gasification system of water waste heat, can reclaim cooling water heat and for the LNG that gasifies.
The technical solution used in the present invention is: supplied gasification by jacket-cooling water blood circulation, duplex matter system, LNG
These four subsystems of system and PLC control system are constituted, jacket-cooling water blood circulation include cylinder sleeve water pump, cooling water tank,
LNG/ Diesel Dual-Fuel Engine, plate type heat exchanger and fan type radiating device, the jacket water of LNG/ Diesel Dual-Fuel Engine goes out
Be connected to successively on connection pipeline between the jacket water water inlet on the mouth of a river and cooling water tank top the first temperature sensor, the one or three
Logical valve, first liquid flow transducer and first liquid ratio adjusting valve, the Centronics port of the first three-way valve and engine cool
System partial circulating connects；Bottom cooling water tank first three between jacket water outlet and first, second liquid electromagnetic valve
Logical Centronics port connects, and is connected to cylinder between jacket water outlet and the Centronics port of first threeway bottom cooling water tank
Set water pump；The upper port of first threeway connects with plate type heat exchanger, and the lower port of first threeway enters with fan type radiating device
The mouth of a river connects；The left port of plate type heat exchanger outlet and second threeway connects, plate type heat exchanger outlet and second
The 3rd liquid electromagnetic valve it is connected to, the outlet phase of the right output port of second threeway and fan type radiating device between the left port of threeway
Connect, between the right output port and the outlet of fan type radiating device of second threeway, be connected to the 4th liquid electromagnetic valve；Second three
Logical Centronics port is through the cylinder of liquid non-return valve, the second three-way valve, the second temperature sensor and LNG/ Diesel Dual-Fuel Engine
Set water water inlet connects, and the Centronics port of the second three-way valve connects with engine-cooling system partial circulating；Described first, second temperature
Degree sensor, first liquid ratio adjusting valve, first liquid flow transducer, cylinder sleeve water pump, first, second, third, fourth liquid
Body electromagnetic valve all connects the PLC in PLC control system；Duplex matter system includes working medium case, working medium pump, and working medium case leads to
Cross the working medium import of sender property outlet connecting plate type heat exchanger, between working medium case and plate type heat exchanger, be connected to second liquid ratio successively
Example regulation valve, second liquid flow transducer, working medium pump, three-temperature sensor；The sender property outlet of plate type heat exchanger and LNG gas
The working medium import changing device connects, and the sender property outlet of LNG gasification device is connected with the working medium import of working medium case；LNG supplies gasification system
Including LNG pump, LNG gasification device and auxiliary LNG storage tank, auxiliary LNG storage tank is successively through manual modulation valve, LNG pump, the 3rd liquid stream
Quantity sensor, the 3rd liquid fraction regulation valve are connected with LNG gasification device, the gaseous natural gas outlet on LNG gasification device top and sky
So connecting bottom gas voltage stabilizing gas tank, the 3rd liquid flow sensor, the 3rd liquid fraction regulation valve, LNG pump connect PLC respectively
Controller；When cylinder sleeve outlet temperature is between 75 DEG C to 90 DEG C, PLC controls second, third liquid electromagnetic valve
Close, the first, the 4th liquid electromagnetic valve is opened, and high temperature jacket water is transported to heat release in fan type radiating device by cylinder sleeve water pump, fall
Jacket-cooling water after temperature absorbs heat in liquid non-return valve flow back into the cylinder sleeve of LNG/ Diesel Dual-Fuel Engine, when cylinder sleeve water outlet
When mouth temperature is more than or equal to 90 DEG C, PLC controls the unlatching of second, third body electromagnetic valve of liquid, the first, the 4th liquid electromagnetic valve
Closing, high temperature jacket-cooling water is transported to plate type heat exchanger to working medium heat release from cylinder sleeve outlet by cylinder sleeve water pump, after heat release
Cooling water temperature reduce, in liquid non-return valve turns again to cylinder sleeve absorb heat；PLC instructs work to working medium pump
Matter pumps out from working medium case, to heat release LNG gasification device after plate type heat exchanger absorbs heat, again flows to plate type heat exchanger after heat release
Absorb heat.
The invention have the benefit that
1. the invention provides a set of auxiliary LNG gasification system, utilize the jacket water of LNG/ Diesel Dual-Fuel Engine
LNG is gasified by waste heat, has accomplished, to the cooling heat radiation of high temperature jacket water, to improve again LNG/ Diesel Dual-Fuel Engine simultaneously
The efficiency of combustion of fuel.
2. present invention employs PLC system is automatically controlled, it is ensured that working medium, natural gas, jacket water
The safety accurately carrying and ensure that operator.
3. the present invention uses temperature sensor, flow transducer, liquid fraction regulation valve during engine cold-start
With cooperating of PLC control system, instead of traditional electromotor thermostat, entrance cylinder sleeve of engine is cooled down the temperature of water
Degree accurately controls, so that it is guaranteed that the cooling water eventually entering into LNG/ Diesel Dual-Fuel Engine cylinder sleeve keeps cylinder sleeve of engine
Optimal chilling temperature.
Below in conjunction with the accompanying drawings and detailed description of the invention is for a more detailed description to the present invention.
Accompanying drawing explanation
Fig. 1 is that the structure of present invention liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat is shown
It is intended to；
In figure: 1. gas solenoid valve；2. natural gas voltage stabilizing gas tank；3. pressure transducer；4. manual modulation valve；5. gas ratio
Example regulation valve；6. combustion gas cleaner；7. natural gas/air mixer；8. cylinder；9.PLC controller；10. reducing three
Logical；11. cooling gas check valves；12.LNG gasifier；13. liquid fraction regulation valves；14. liquid flow sensors；15. three-way valve；
16. temperature sensors；17. three-way valve；18. liquid non-return valves；19. cooling water tanks；20.LNG/ Diesel Dual-Fuel Engine；21.
Plate type heat exchanger；22. high temperature cylinder sleeve water pumps；23. working medium liquid level sensors；24. working medium casees；25. liquid fraction regulation valves；26.
Temperature sensor；27. temperature sensors；28. temperature sensors；29. second threeways；30. working medium pumps；31. fluid floies pass
Sensor；32. liquid fraction regulation valves；33,34,35,36. liquid electromagnetic valve；37. adjustable speed motors；38. fan type radiating devices；
39.LNG pump；40. manual modulation valves；41. natural gas leaking alarms；42. auxiliary LNG storage tank；43.LNG liquid level sensor；
44. cooling gas check valves；45. flash steams (Boil Off Gas is called for short BOG, flash steam) storage tank；46. gas pressure sensors；
47. temperature sensors；48. temperature sensors；49. liquid flow sensors.
Detailed description of the invention
As it is shown in figure 1, the present invention is made up of four subsystems, it is jacket-cooling water blood circulation, working medium circulation system respectively
System, LNG supply gasification system and PLC control system.
Jacket-cooling water blood circulation includes high temperature cylinder sleeve water pump 22, cooling water tank 19, LNG/ Diesel Dual-Fuel Engine
20, plate type heat exchanger 21, fan type radiating device 38 and connection pipeline etc..Cylinder sleeve on the left of LNG/ Diesel Dual-Fuel Engine 20
It is connected by pipeline between water outlet and the jacket water water inlet on cooling water tank 19 top, at LNG/ Diesel Dual-Fuel Engine
It is connected to temperature on connection pipeline between jacket water outlet and the jacket water water inlet on cooling water tank 19 top of 20 successively pass
Sensor 16, three-way valve 15, liquid flow sensor 14, liquid fraction regulation valve 13.Wherein, the Centronics port of three-way valve 15 passes through
Pipeline connects with engine-cooling system partial circulating.Jacket water outlet bottom cooling water tank 19 and liquid electromagnetic valve 33 and liquid
The Centronics port of the threeway between body electromagnetic valve 34 is connected by pipeline, jacket water outlet bottom cooling water tank 19 and this
High temperature cylinder sleeve water pump 22 it is connected on connection pipeline between the Centronics port of threeway.Liquid electromagnetic valve 33 and liquid electromagnetic valve 34 it
Between the upper port of threeway connect, in the upper port of this threeway with the high temperature jacket water water inlet of plate type heat exchanger 21 left upper portion
And connect liquid electromagnetic valve 34 on the connection pipeline between the high temperature jacket water water inlet of plate type heat exchanger 21 left upper portion, this threeway
Lower port connect with the water inlet on the left of fan type radiating device 38, on the left of the lower port of this threeway and fan type radiating device 38
Liquid electromagnetic valve 33 is connect on pipeline between water inlet.The high temperature jacket water outlet of plate type heat exchanger 21 lower right side and threeway
The left port of 29 is connected by pipeline, at high temperature jacket water outlet and the left end of threeway 29 of plate type heat exchanger 21 lower right side
Be connected to a liquid electromagnetic valve 35 on pipeline between Kou, the outlet on the right side of the right output port of threeway 29 and fan type radiating device 38 it
Between connected by pipeline, on the right side of the right output port and fan type radiating device of threeway 29, be connected to one on pipeline between the outlet of 38
Liquid electromagnetic valve 36.Wherein, fan type radiating device 38 connects adjustable speed motor 37, is driven by adjustable speed motor 37；Three
The Centronics port of logical 29 is connected by pipeline, three between the jacket water water inlet on the right side of LNG/ Diesel Dual-Fuel Engine 20
On the connection pipeline between jacket water water inlet on the right side of the Centronics port of logical 29 and LNG/ Diesel Dual-Fuel Engine 20 successively
Being connected to liquid non-return valve 18, three-way valve 17, temperature sensor 27, wherein, the Centronics port of three-way valve 17 passes through pipeline and starts
Machine cooling system partial circulating connects.In jacket-cooling water blood circulation, temperature sensor 16,27, liquid flow sensor 14
All pass through holding wire to be connected with Analog input mModule, then connect PLC 9；PLC 9 is by control line and amplifier
It is connected, connects liquid fraction regulation valve 13, high temperature cylinder sleeve water pump 22, liquid non-return valve 33,34,35,36 and fan the most respectively
Adjustable speed motor 37 on radiator 38.
Duplex matter system includes working medium case 24, working medium pump 30 and connects pipeline etc..Wherein, working medium case 24 left lower is
Sender property outlet, working medium case 24 passes through the working medium import of the right upper portion of sender property outlet and pipe connecting formula heat exchanger 21,
Liquid fraction regulation valve 32, liquid flow sensor it is connected to successively on connection pipeline between working medium case 24 and plate type heat exchanger 21
31, working medium pump 30, temperature sensor 28.The sender property outlet of plate type heat exchanger 21 left lower and LNG gasification device 12 hypomere sidepiece
Working medium import between connected by pipeline, at sender property outlet and LNG gasification device 12 hypomere of plate type heat exchanger 21 left lower
A temperature sensor 26 it is connected on connection pipeline between the working medium import of sidepiece.The working medium of LNG gasification device 12 left upper portion goes out
Being connected by pipeline between mouth and the working medium import of working medium case 24 upper right, the working medium in LNG gasification device 12 left upper portion goes out
Mouthful and working medium case 24 upper right between connection pipeline on be connected to a temperature sensor 47, and temperature sensor 47 close proximity to
The sender property outlet end of LNG gasification device 12 left upper portion.A working medium liquid level sensor 23 it is connected on the top of working medium case 24.In working medium
In blood circulation, liquid flow sensor 31, temperature sensor 28,26,47, working medium liquid level sensor 23 all pass through holding wire with
Analog input mModule is connected, then connects PLC 9；PLC 9 is connected with amplifier by control line, connects the most respectively
Liquid fraction regulation valve 32, working medium pump 30.
LNG supply gasification system includes LNG pump 39, LNG gasification device 12, auxiliary LNG storage tank 42, flash steam storage tank 45, different
Footpath threeway 10, natural gas voltage stabilizing gas tank 2, combustion gas cleaner 6, natural gas/air mixer 7, cylinder 8 and connecting tube
Road etc..Wherein, it is connected by pipeline between auxiliary LNG storage tank 42 and the LNG import of LNG gasification device 12 bottom, in auxiliary LNG storage
Manual modulation valve 40, LNG pump 39, liquid it is connected to successively on connection pipeline between the LNG import of tank 42 and LNG gasification device 12 bottom
Body flow transducer 49, liquid fraction regulation valve 25.Gaseous natural gas outlet and the natural gas voltage stabilizing gas on LNG gasification device 12 top
Connected by pipeline between gaseous natural gas import bottom tank 2, the gaseous natural gas outlet on LNG gasification device 12 top and sky
So it is connected to temperature sensor 48, gas list successively on the connection pipeline between the gaseous natural gas import bottom gas voltage stabilizing gas tank 2
To valve 11, reducer tee 10.Wherein by pipe between Centronics port and the upper port of flash steam storage tank 45 of reducer tee 10
Road connects, equipped with a gas on the connection pipeline between the Centronics port and the upper port of flash steam storage tank 45 of reducer tee 10
Body electromagnetic valve 1.On the top of flash steam storage tank 45 equipped with a pressure transducer 46.Auxiliary LNG storage tank 42 left upper portion and flash distillation
Connected by pipeline between the bottom of vapour storage tank 45, in the bottom of auxiliary LNG storage tank 42 left upper portion and flash steam storage tank 45 it
Between connection pipeline on equipped with a cooling gas check valve 44.Pipeline is passed through between combustion gas cleaner 6 and natural gas voltage stabilizing gas tank 2 top
Connect, the connection pipeline between combustion gas cleaner 6 and natural gas voltage stabilizing gas tank 2 top is connected to manual modulation valve 4, gas successively
Body ratio adjusting valve 5, wherein, the top of natural gas voltage stabilizing gas tank 2 is equipped with a pressure transducer 3.Combustion gas cleaner 6 is with natural
Connected by pipeline between gas/air mixer 7, between natural gas/air mixer 7 and cylinder 8 by pipeline even
Connect.In LNG supply gasification system, liquid flow sensor 49, temperature sensor 48, liquid level sensor 43, pressure transducer 3
All pass through holding wire to be connected with Analog input mModule, then connect PLC 9；PLC 9 is by control line and amplifier
It is connected, connects liquid fraction regulation valve 25, LNG pump 39, gas solenoid valve 1, gas ratio regulation valve 5 the most respectively.
PLC control system includes that temperature sensor 16, liquid fraction regulation valve 13, liquid flow sensor 14, temperature pass
Sensor 27, liquid fraction regulation valve 32, liquid flow sensor 31, temperature sensor 28, temperature sensor 26, working medium liquid level pass
Sensor 23, LNG liquid level sensor 43, liquid flow sensor 30, liquid fraction regulation valve 25, gas ratio regulation valve 5, gas
Electromagnetic valve 1, gas pressure sensor 46, liquid electromagnetic valve 33,34,35,36, adjustable speed motor 37, PLC 9, temperature pass
Sensor 47, temperature sensor 48 and connection line etc..
Traditional electromotor uses thermostat can be automatically adjusted the water entering radiator according to the temperature height of cooling water
Amount, to ensure that electromotor works in suitable temperature range.The present invention uses temperature sensor 16 to engine cold-start process
Complete, i.e. by LNG/ Diesel Dual-Fuel Engine 20 with flow transducer 14, liquid fraction regulation valve 13 and PLC control system
With the partial circulating that three-way valve 17 and three-way valve 15 miscellaneous part realize jacket-cooling water, temperature sensor 16 detects cylinder sleeve outlet
Water temperature, when water temperature slowly reaches or during more than 75 DEG C, and now partial circulating no longer meets the cooling requirement of electromotor, at this moment will
Progressing into cooling water system systemic circulation, owing to now the temperature difference is smaller, heat transfer effect is inconspicuous, and plate type heat exchanger 21 can not be
LNG gasification provides enough heats, therefore arranges only when cylinder sleeve outlet temperature reaches 90 DEG C, just begins with board-like changing
Hot device 21 carries out heat exchange, when outlet jacket water temperature is between 75 DEG C and 90 DEG C, system with fan type radiating device 38 by middle high temperature
The heat of jacket water is drained, and the jacket-cooling water after heat radiation returns in circulation line.
When cylinder sleeve outlet temperature is between 75 DEG C to 90 DEG C, now PLC 9 control liquid electromagnetic valve 34,
35 all in closed mode, and controls liquid electromagnetic valve 33,36 and be in opening, and now jacket-cooling water pump 22 is by high temperature cylinder
Set water is transported to fan type radiating device 38 carry out heat release from cylinder sleeve outlet, and the jacket-cooling water after cooling is through liquid non-return valve
Heat absorption in 18 cylinder sleeves flowing back into electromotor, adjustable speed motor 37 can regulate rotation speed of the fan to regulate the size of heat dissipation capacity.When
Cylinder sleeve outlet temperature is when more than or equal to 90 DEG C, and now, PLC 9 controls liquid electromagnetic valve 34,35 all in opening shape
State, and liquid electromagnetic valve 33,36 is closed, high temperature jacket-cooling water is transported to by cylinder sleeve water pump 22 from cylinder sleeve outlet
To working medium heat release in plate type heat exchanger 21, carrying out heat exchange in this and working medium, the cooling water temperature after heat release reduces, through liquid
Check valve 18 absorbs heat in turning again to cylinder sleeve, circulates with this.Order about that jacket-cooling water circulates is jacket water
Pump 22, cooling water tank 19 is used for storing unnecessary or supplementary not enough cooling water.The effect of liquid non-return valve 18 is to prevent cooling water little
Cooling aqueous reflux in closed circuit returns in plate type heat exchanger 21 or fan type radiating device 38, and promoting to cool down water can only be in systemic circulation
Interior one-way flow.
Cooling water is after systemic circulation is flowed, and PLC 9 starts, by working medium from working medium case 24 to working medium pump 30 instruction
Pump out, to heat release LNG gasification device 12 after plate type heat exchanger 21 absorbs heat.After heat release, Temperature of Working reduces, by pipeline again
Flow to plate type heat exchanger 21 in jacket-cooling water, absorb heat, circulate with this, circulate resistance and rely on working medium pump 30
Overcome.Working medium case 24 stores working medium that is unnecessary or that supplement deficiency.LNG pump 39 is ordered about LNG auxiliary LNG storage tank 42 and is flowed to LNG
Gasifier 12, and at this from working medium absorb heat be gasificated into natural gas, natural gas storing in natural gas vacuum tank 2, natural gas
After combustion gas cleaner 6 filtering, in natural gas/air mixer 7, it is mixed into combustion mixture, sucks gas in-cylinder combustion work done.
When cylinder 8 only works with diesel oil, high temperature jacket-cooling water is not passed through plate type heat exchanger 21, but flows through fan type radiating
Device 38, the cooling water after cooling flows to cylinder sleeve of engine again, and working medium and LNG gasification device 12 are not involved in work.Wherein, liquid
The effect of flow transducer 31 is the flow measuring working medium pipeline, and the effect of temperature sensor 47 is in detection LNG gasification device 12
Temperature value at sender property outlet, the effect of liquid fraction regulation valve 32 is the size of controlled medium flow.Plate type heat exchanger 21
Working medium entrance and the port of export are respectively provided with a temperature sensor 26 and temperature sensor 28, are respectively used for measuring plate type heat exchanger 21
The temperature value of working medium entrance and the port of export.It is used for monitoring working medium case 24 equipped with a working medium liquid level sensor 23 above working medium case 24
The liquid level of middle working medium.
Cooling water is after systemic circulation is flowed, and LNG is extracted out from auxiliary LNG storage tank 42 and enters LNG gasification device by LNG pump 39
12, and in LNG gasification device 12, absorb the heat of working medium, and make LNG gasification become natural gas, it is stored in by cooling gas check valve 11
In natural gas voltage stabilizing gas tank 2, for preventing natural gas backflow to be provided with cooling gas check valve 11.Natural gas voltage stabilizing gas tank 2 is LNG/ diesel oil
The natural gas of dual fuel engine 20 stable storage pressure, with air at natural gas/sky after natural gas via combustion gas cleaner 6 filtering
Gas blender 7 is formed combustion mixture, sucks work done of burning in cylinder 8.It is provided with liquid to detect LNG stream amount in real time
Body flow transducer 49, and temperature sensor 48 detects LNG gasification device 12 gas outlet temperature, the effect of gas ratio regulation valve 5
Being the flow controlling natural gas, the effect of manual modulation valve 40 is manually to regulate the break-make of LNG, manual modulation valve 4 in LNG pipeline
Effect be manually regulation natural gas break-make in pipeline, when system jam, staff can close hands timely
Dynamic regulation valve 40 and manual modulation valve 4, to prevent the generation of dangerous situation, in the case of PLC 9 normal operation manually
Regulation valve 40 and manual modulation valve 4 are normally opened, and aperture is maximum.Natural gas voltage stabilizing gas tank 2 pressure transducer installed above
3, its effect is to measure the gas pressure in natural gas voltage stabilizing gas tank 2.It is provided with liquid level sensor 43 in auxiliary LNG storage tank 42,
Its effect is to measure LNG liquid level in auxiliary LNG storage tank 42.Owing to the LNG in auxiliary LNG storage tank 42 can produce evaporation,
This portion gas is referred to as BOG flash steam, and BOG flash steam makes LNG storage tank 42 meteorological spatial pressure raise, this part BOG flash distillation
Vapour enters in flash steam storage tank 45 by cooling gas check valve 44, and the effect of cooling gas check valve 44 is to prevent flash steam from refunding auxiliary
In LNG storage tank 42, flash steam storage tank 45 is connected with natural gas voltage stabilizing gas tank 2 through reducer tee 10, so can make flash steam
Enter in natural gas voltage stabilizing gas tank 2, between flash steam storage tank 45 and reducer tee 10, have gas solenoid valve 1, its work
With being to control flash steam to enter into natural gas voltage stabilizing and fill the through and off of 2, it is arranged over pressure transducer at flash steam storage tank 45
46, its effect is to measure the pressure of natural gas in flash steam storage tank 45.In LNG gasification system, respectively at flash steam storage tank
Flange at 45 two ends nozzle flanges, at the two ends nozzle flange of LNG pump 39, between auxiliary LNG storage tank 42 and LNG pump 39
Junction, the nozzle flange junction of gas inlet and outlet of LNG gasification device 12, the outlet(discharge) flange of natural gas voltage stabilizing gas tank 2 connect
It is respectively arranged with a natural gas leaking alarm 41 at place and flash steam storage tank 45 two ends nozzle flange, manages at the two ends of LNG pump 39
Mouth flange is respectively provided with a natural gas leaking alarm 41, at the flange between flash steam storage tank 45 and LNG pump 39
Also it is connected to a natural gas leaking alarm 41, at the nozzle flange of the gas inlet and outlet of LNG gasification device 12, is also respectively provided with one
Natural gas leaking alarm 41, the effect of alarm is that staff can find in time when natural gas occurs leakage, and and
Time make corresponding measure.
Claims (6)
1. a liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat, is circulated by jacket-cooling water
System, duplex matter system, LNG supply gasification system and these four subsystems of PLC control system are constituted, and it is characterized in that:
Jacket-cooling water blood circulation include cylinder sleeve water pump (22), cooling water tank (19), LNG/ Diesel Dual-Fuel Engine (20),
Plate type heat exchanger (21) and fan type radiating device (38), the jacket water outlet of LNG/ Diesel Dual-Fuel Engine (20) and cooling
The first temperature sensor (16), the first threeway it is connected to successively on connection pipeline between the jacket water water inlet on water tank (19) top
Valve (15), first liquid flow transducer (14) and first liquid ratio adjusting valve (13), the intermediate ends of the first three-way valve (15)
Mouth connects with engine-cooling system partial circulating；The jacket water outlet of cooling water tank (19) bottom and first, second liquid electric
The Centronics port of first threeway between magnet valve (33,34) connects, cooling water tank (19) bottom jacket water outlet with
Cylinder sleeve water pump (22) it is connected between the Centronics port of first threeway；The upper port of first threeway and plate type heat exchanger (21) phase
Connecing, the lower port of first threeway connects with fan type radiating device (38) water inlet；Plate type heat exchanger (21) outlet and second
The left port of individual threeway (29) connects, and is connected between the left port of plate type heat exchanger (21) outlet and second threeway (29)
3rd liquid electromagnetic valve (35), the right output port of second threeway (29) connects with the outlet of fan type radiating device (38),
It is connected to the 4th liquid electromagnetic valve (36) between right output port and the outlet of fan type radiating device (38) of two threeways (29)；Second
The Centronics port of individual threeway (29) is through liquid non-return valve (18), the second three-way valve (17), the second temperature sensor (27) and LNG/
The jacket water water inlet of Diesel Dual-Fuel Engine (20) connects, the Centronics port of the second three-way valve (17) and engine cool system
System partial circulating connects；Described first, second temperature sensor (16,27), first liquid ratio adjusting valve (13), first liquid stream
Quantity sensor (14), cylinder sleeve water pump (22), first, second, third, fourth liquid electromagnetic valve (33,34,35,36) all connect PLC
PLC (9) in control system；Duplex matter system includes working medium case (24), working medium pump (30), and working medium case (24) passes through
The working medium import of sender property outlet connecting plate type heat exchanger (21), is connected between working medium case (24) and plate type heat exchanger (21) successively
Second liquid ratio adjusting valve (32), second liquid flow transducer (31), working medium pump (30), three-temperature sensor (28)；
The sender property outlet of plate type heat exchanger (21) is connected with the working medium import of LNG gasification device (12), the sender property outlet of LNG gasification device (12)
Working medium import with working medium case (24) is connected；LNG supply gasification system includes LNG pump (39), LNG gasification device (12) and auxiliary
LNG storage tank (42), auxiliary LNG storage tank (42) is successively through manual modulation valve (40), LNG pump (39), the 3rd liquid flow sensor
(49), the 3rd liquid fraction regulation valve (25) be connected with LNG gasification device (12), the gaseous natural gas on LNG gasification device (12) top
Export and be connected with natural gas voltage stabilizing gas tank (2) bottom, the 3rd liquid flow sensor (49), the 3rd liquid fraction regulation valve
(25), LNG pump (39) connects PLC (9) respectively；
When cylinder sleeve outlet temperature is between 75 DEG C to 90 DEG C, PLC (9) controls second, third liquid electromagnetic valve
(34,35) are closed, the first, the 4th liquid electromagnetic valve (33,36) is opened, and high temperature jacket water is transported to fan by cylinder sleeve water pump (22)
Heat release in formula radiator (38), the jacket-cooling water after cooling flow back into LNG/ diesel dual-fuel through liquid non-return valve (18) and starts
Heat absorption in the cylinder sleeve of machine (20), when cylinder sleeve outlet temperature is more than or equal to 90 DEG C, PLC (9) control liquid second, third
Body electromagnetic valve (34,35) is opened, the first, the 4th liquid electromagnetic valve (33,36) is closed, and high temperature cylinder sleeve is cooled down by cylinder sleeve water pump (22)
Water is transported to plate type heat exchanger (21) to working medium heat release from cylinder sleeve outlet, and the cooling water temperature after heat release reduces, through liquid
Check valve (18) absorbs heat in turning again to cylinder sleeve；PLC (9) gives working medium pump (30) instruction by working medium from working medium case
(24) pump out in, to heat release LNG gasification device (12) after plate type heat exchanger (21) absorbs heat, after heat release, again flow to plate-type heat-exchange
Device (21) absorbs heat.
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat the most according to claim 1, its
Feature is: be connected to successively between LNG gasification device (12) and natural gas voltage stabilizing gas tank (2) the 4th temperature sensor (48), first
The upper end of cooling gas check valve (11) and reducer tee (10), the Centronics port of reducer tee (10) and flash steam storage tank (45)
Mouth connects, equipped with a gas solenoid valve (1) between reducer tee (10) and flash steam storage tank (45), and the top of flash steam storage tank (45)
Holding equipped with a pressure transducer (46), auxiliary LNG storage tank (42) is connected with flash steam storage tank (45), in auxiliary LNG storage tank (42)
And equipped with one second cooling gas check valve (44) between flash steam storage tank (45)；4th temperature sensor (48), first, second gas
Check valve (11,44), gas solenoid valve (1), pressure transducer (46) connect PLC (9) respectively.
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat the most according to claim 1, its
Feature is: natural gas voltage stabilizing gas tank (2) top is connected with combustion gas cleaner (6), at combustion gas cleaner (6) and natural gas voltage stabilizing gas
Manual modulation valve (4), gas ratio regulation valve (5), natural gas voltage stabilizing gas it is connected to successively on connection pipeline between tank (2) top
The top of tank (2) is equipped with a pressure transducer (3), and combustion gas cleaner (6) is connected with natural gas/air mixer (7), natural
Gas/air mixer (7) is connected with cylinder (8)；Gas ratio regulation valve (5), pressure transducer (3) connect respectively
PLC (9).
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat the most according to claim 1, its
Feature is: be connected to one the 5th temperature sensing on the connection pipeline between sender property outlet and the working medium case (24) of LNG gasification device (12)
Device (47), the 5th temperature sensor (47) is near the sender property outlet end of LNG gasification device (12).
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat the most according to claim 1, its
Feature is: be connected to a working medium liquid level sensor (23) on the top of working medium case (24), and working medium liquid level sensor (23) passes through signal
Line connects PLC (9).
Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat the most according to claim 1, its
Feature is: equipped with adjustable speed motor (37) on fan type radiating device (38), and adjustable speed motor (37) connects PLC (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510041519.9A CN104595063B (en) | 2015-01-28 | 2015-01-28 | Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat |
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| CN201510041519.9A CN104595063B (en) | 2015-01-28 | 2015-01-28 | Liquified natural gas gasification system based on double fuel engine of boat and ship cooling water heat |
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| Publication Number | Publication Date |
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| CN104595063A CN104595063A (en) | 2015-05-06 |
| CN104595063B true CN104595063B (en) | 2016-10-12 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6417315B2 (en) * | 2015-12-17 | 2018-11-07 | 日立オートモティブシステムズ株式会社 | Cooling device for internal combustion engine for vehicle |
| CN106828859A (en) * | 2017-01-20 | 2017-06-13 | 中国船舶重工集团公司第七研究所 | For the liquified natural gas gasification heating system of ship |
| CN107489529B (en) * | 2017-08-25 | 2019-05-24 | 浙江海洋大学 | A kind of inlet duct of LNG gas turbine steam combined cycle power generating |
| CN107448305B (en) * | 2017-09-25 | 2023-05-12 | 百发动力（无锡）有限公司 | Dual-fuel generator set control system and control method thereof |
| CN109737304A (en) * | 2019-02-18 | 2019-05-10 | 中国建材国际工程集团有限公司 | It is a kind of to stablize gasification air supply system and method using melting furnaces circulating cooling water afterheat |
| CN109878685A (en) * | 2019-02-28 | 2019-06-14 | 哈尔滨工程大学 | A kind of pneumoelectric series parallel type ship hybrid power system that band LNG is cooling |
| CN109878680B (en) * | 2019-02-28 | 2022-01-14 | 哈尔滨工程大学 | Take LNG refrigerated gas-electric parallel boats and ships hybrid system |
| CN110469770A (en) * | 2019-08-09 | 2019-11-19 | 英嘉动力科技无锡有限公司 | A kind of novel LNG vaporization device |
| CN111609311B (en) * | 2020-05-27 | 2021-11-02 | 青岛双瑞海洋环境工程股份有限公司 | Low-pressure LNG (liquefied Natural gas) supply system of dual-fuel ship engine and dual-fuel ship |
| CN111874200B (en) * | 2020-07-07 | 2022-07-08 | 武汉理工大学 | LNG ship heat energy comprehensive utilization system |
| CN114517715A (en) * | 2022-02-23 | 2022-05-20 | 武汉理工大学 | Liquid ammonia cold energy multistage utilization system of ammonia fuel engine ship |
| CN114760812A (en) * | 2022-03-24 | 2022-07-15 | 江苏科技大学 | Cooling and heat dissipation system and method for closed electric cabinet in specific cabin of ship |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102006061251B4 (en) * | 2006-12-22 | 2010-11-11 | Man Diesel & Turbo Se | Gas supply system for a drive |
| CN102235269B (en) * | 2010-04-27 | 2015-12-30 | 潍柴动力股份有限公司 | A kind of fuel system and the Vehicular system comprising this fuel system |
| KR101229620B1 (en) * | 2011-09-27 | 2013-02-04 | 에스티엑스조선해양 주식회사 | Liquefied Natural Gas Supply System for Marine Vessel or Offshore Plant |
| CN102996194B (en) * | 2012-12-06 | 2014-12-10 | 西安交通大学 | Comprehensive energy recycling system based on liquefied natural gas automobile |
| CN103557071B (en) * | 2013-10-25 | 2016-02-17 | 张毅 | Combustion gas cold energy raising engine thermal efficiency is utilized to realize the system and method for energy-saving and emission-reduction |
| CN203730162U (en) * | 2013-12-24 | 2014-07-23 | 山东大学 | Inlet gas temperature control system of liquefied natural gas engine |
| CN103899440B (en) * | 2014-03-11 | 2016-05-04 | 哈尔滨工程大学 | A kind of dual fuel engine LNG gasification system peculiar to vessel and control method thereof |
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Application publication date: 20150506 Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Denomination of invention: Liquid natural gas gasification system based on waste heat of cooling water of dual fuel marine engine Granted publication date: 20161012 License type: Common License Record date: 20221128 |
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Assignee: Jiangsu University of Science and Technology Technology Transfer Center Co.,Ltd. Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980022975 Date of cancellation: 20230310 |