CN109185693A - The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel - Google Patents
The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel Download PDFInfo
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- CN109185693A CN109185693A CN201811063197.8A CN201811063197A CN109185693A CN 109185693 A CN109185693 A CN 109185693A CN 201811063197 A CN201811063197 A CN 201811063197A CN 109185693 A CN109185693 A CN 109185693A
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- bog
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- 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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
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- 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
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
-
- 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
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- 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
- B63H21/20—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units
- B63H2021/202—Use of propulsion power plant or units on vessels the vessels being powered by combinations of different types of propulsion units of hybrid electric type
-
- 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
- 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
- Y02T70/00—Maritime or waterways transport
- Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
- Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of natural gas high-low pressure integrated gas supply systems of large-scale double fuel Power Vessel, including LNG fuel compartment and high and low pressure air supply system；LNG fuel compartment is IMO Type B film cabin.High pressure air feed system is boosted LNG by LNG booster pump, by LNG high pressure gasifier by LNG gasification and heating, provides the combustion gas for meeting marine main engine required pressure, temperature, flow.Low pressure air supply system includes LNG gasification unit and BOG processing unit.LNG gasification unit, by LNG gasification and heating, provides the combustion gas for meeting generator and/or boiler required pressure, temperature, flow by LNG low pressure gasifying device；BOG processing unit is pressurizeed by room temperature BOG compressor, then adjusts temperature by BOG heater and BOG compressor outlet heat exchanger, provides the combustion gas for meeting double fuel engine machine and/or boiler required pressure, temperature, flow.The present invention keeps air supply system simpler reliable.
Description
Technical field
The present invention relates to a kind of ships using International Maritime Organization (IMO) Type B cabin as liquefied natural gas (LNG) storage cabin
With fuel gas feed system, in particular to a kind of high-low pressure integrated gas supply system of large-scale double fuel Power Vessel, the gas supply system
System meets the LNG Power Vessel rule and related classification society rule standard of newest IGF rule.
Background technique
Ship can discharge a large amount of NO to atmosphere in combusting heavy oilX、SOX、CO2And PM2.5 particulate matter, some big
Type harbour, river and sea area can all form biggish environmental pollution, one of even main pollution sources.This at present to environmental protection
It is required that increasingly paying attention to not being consistent.In addition as MARPOL International Convention for the Prevention of Pollution from Ships is increasingly stringenter, and
In view of ship flue gas emission provides the implementation of Tier III, new ship and it is some require to take measures in battalion's ship, subtract
NO in few tail gasX、SOXAnd the discharge of PM2.5 particulate matter, with meet the requirement of environmental protection.
LNG is increasingly taken seriously as a kind of clean energy resource, and the emission after burning is environmentally friendly, can reduce
30% or more carbon emission and discharged nitrous oxides, 98% or more sulfur oxides emissions and 30% or so fuel cost.Closely
Nian Lai, many governments, shipowner use natural gas as ship power fuel in positive trial.
In recent years, in the world protected environment and meet regulation rule requirement driving, need of the whole world to clean energy resource
Ask continuous expansion.According to " world prevents ship from causing environmental pollution pact " (MARPOL supplemental provisions VI --- prevent ship air dirty
Dye rule) it requires, all ships by emission control region must satisfy the emission request of oxysulfide and nitrogen oxides, this
By demand of the stimulation market to the double fuel powered ship for using natural gas Power Vessel and conventional fuel oil significantly.
The 95th session (MSC 95) of International Maritime Organization (IMO) the Maritime Safety committee held on June 12nd, 2015
" using gas or other low-flash fuel ship world securities rule " (hereinafter referred to as " IGF rule ") is passed through, and in 2015
On July 20, in has issued document with MSC.391 (95), and the mandatory term of the rule is in life on January 1 in 2017 at present
Effect.The rule is formally issued as ship and has established solid foundation using LNG fuel, the reality of mandatory provisions in the rule
It applies, the risk of ship, crewman and environment is preferably minimized, the double effects with " ship is safer " and " protection environment ".Separately
The relevant regulation of outer many natural gas Power Vessel shippings, is also gradually improved.The equipment supply chain of the natural pneumatic power system of ship
It is complete effective.
The host configured on large-scale double fuel Power Vessel is the ME-GI power team of graceful benefactor department, is two-stroke high pressure
Gaseous propellant engine is sprayed, gas supply operating pressure reaches 300bar or so, is known as " high-pressure air feed system for the system of its gas supply
System ".The subsidiary engine configured on ship includes gas electricity generator and gas fired-boiler, and gas electricity generator is that four stroke dual-fuel of low pressure starts
Machine, supply gas pressure are usually less than 10bar, and by taking the medium-speed engine of watt Ceylon as an example, supply gas pressure is 6bar or so, supply for it
The system of gas is known as " low pressure air supply system ".The supply gas pressure of double fuel boiler is not higher than 6bar.For this purpose, needing to consider on ship same
The a set of high pressure air feed system of Shi Peibei and low pressure air supply system, to meet the air supply requirement of high pressure host and the gas supply of low pressure subsidiary engine
It is required that.Structure is complicated for existing high-low pressure air supply system, and volume is big, and equipment investment is big.
Summary of the invention
A kind of natural gas of large-scale double fuel Power Vessel is provided it is an object of the invention to overcome the deficiencies of existing technologies
High-low pressure integrated gas supply system, it solves different demands of the double fuel Power Vessel using multiple types gas equipment to combustion gas,
And change the process flow of existing air supply system complexity, keep air supply system simpler reliable.
The object of the present invention is achieved like this: a kind of integrated gas supply system of the natural gas high-low pressure of large size double fuel Power Vessel
System, for providing the gas fuel of different pressures, temperature and flow to the gas equipment on ship；The gas equipment includes ship
Oceangoing ship host, generator and boiler；The marine main engine uses low speed two-stroke dual-fuel；During the generator and boiler are all made of
Fast four stroke dual-fuels；The high-low pressure integrated gas supply system includes LNG fuel compartment, LNG filling station, high pressure air feed system and low
Press air supply system；Wherein,
The LNG fuel compartment is IMO Type B film cabin；
The filling station includes the LNG filling pipeline being connected to the LNG fuel compartment and the top for being connected to LNG fuel compartment
BOG return duct；
The high pressure air feed system includes the LNG immersed pump being located in the LNG fuel compartment, by LNG delivery pipe and LNG
The surge tank of the outlet connection of immersed pump, the outlet of the surge tank are connect with the import of high-pressure air feed pipeline, high-pressure air feed pipeline
On LNG booster pump and LNG high pressure gasifier are successively installed, the outlet of the high-pressure air feed pipeline by host combustion gas valve group with it is described
Marine main engine connection；LNG highest can be pressurized to 300bar by the LNG booster pump；
The LNG booster pump uses hydraulic-driven and provides power by individual hydraulic power unit for it, this is hydraulic dynamic
Power unit arrangement safety zone aboard ship, or the hydraulic system that use marine main engine to carry provided for the LNG booster pump it is dynamic
Power；
The low pressure air supply system includes LNG gasification unit and BOG processing unit；
The LNG gasification unit includes the low pressure steam line and be mounted on low pressure air supply pipe that the outlet with surge tank connects
LNG low pressure gasifying device on road, the outlet of the low pressure steam line are connect with subsidiary engine combustion gas valve group and boiler flue gas valve group respectively,
The subsidiary engine combustion gas valve group and boiler flue gas valve group are connect with the generator and boiler correspondingly；
The BOG processing unit includes the BOG pipeline connecting with the top of the LNG fuel compartment, is mounted on BOG pipeline
BOG heater, with BOG heater outlet connection BOG gas-liquid separator, pass through BOG air inlet pipe and BOG gas-liquid separator
Gas vent connection BOG compressor, changed by the compressor outlet that BOG exhaust pipe is connect with the gas outlet of BOG compressor
Hot device, the outlet of the compressor outlet heat exchanger are connect with subsidiary engine combustion gas valve group and boiler flue gas valve group respectively, the subsidiary engine combustion
Air valve group and boiler flue gas valve group are connect with the generator and boiler correspondingly；The BOG heater can be LNG fuel
Evaporated natural gas in cabin is warming up to 0 DEG C or more；The BOG compressor is room temperature BOG compressor and can be evaporated natural gas
Pressure boost is to being no more than 10bar；The temperature of pressurized evaporated natural gas is heated to 20 by the compressor outlet heat exchanger
~40 DEG C.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the LNG is high-pressure gasified
Device, LNG low pressure gasifying device, BOG heater and compressor outlet heat exchanger by the same Two-way Cycle heating system heats and are adopted
Spent glycol aqueous solution is as heat transferring medium；The Two-way Cycle heating system includes glycol water expansion drum and ethylene glycol
The sequentially connected glycol water delivery pump of the liquid outlet of aqueous solution expansion drum and glycol water heater, the ethylene glycol
The liquid outlet of the aqueous solution heater heat exchanger tube with the import of the heat exchanger tube of LNG high pressure gasifier, LNG low pressure gasifying device respectively
Import, the import of heat exchanger tube of BOG heater are connected with the import of the heat exchanger tube of compressor outlet heat exchanger；The LNG high pressure
The outlet of the heat exchanger tube of gasifier, the outlet of the heat exchanger tube of LNG low pressure gasifying device, BOG heater heat exchanger tube outlet and pressure
The outlet of the heat exchanger tube of contracting machine outlet heat exchanger is connect with the inlet of glycol water expansion drum；The ethylene glycol is water-soluble
The steam that liquid heater is generated using the boiler is as heat transferring medium.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the LNG filling station has
Two and respectively it is located at the left and right side of a ship of ship；The BOG return duct on the bank or filling ship connect.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the LNG immersed pump,
LNG booster pump and room temperature BOG compressor configure two, wherein one is spare；When the pressure of LNG fuel compartment is more than setting value
When, two room temperature BOG compressors work at the same time.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the LNG fuel compartment
Natural gas vent mast top installation safety valve and connect with safety valve.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein at the generator
During the work of combustion gas mode, 0~10kPa is in by the pressure of the BOG compressor control LNG fuel compartment always.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein when the marine main engine
It does not work in combustion gas mode with generator or during stopping working, and when the pressure of LNG fuel compartment is close to 70kPa, passes through boiler
It is run under combustion gas mode, to consume BOG.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the host gas valve
Group, subsidiary engine combustion gas valve group and boiler flue gas valve group are all made of interlocking valve group and are respectively disposed in an individual combustor.
The natural gas high-low pressure integrated gas supply system of above-mentioned large-scale double fuel Power Vessel, wherein the high-pressure air feed pipe
Road and low pressure steam line are all made of double-wall pipe.
The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel of the invention, solves double fuel Power Vessel
Using multiple types gas equipment to the different demands of combustion gas, and change the process flow of existing air supply system complexity, makes to supply
System is simpler reliable.The present invention also has the following characteristics that
1, perfect BOG Managed Solution: various heating amounts needed for ship are provided by the steam that boiler generates, and can not only be saved
The about energy, and extra BOG combustion gas is directly burnt up compared to using gas burner (GCU), double fuel boiler is preferably sharp
With the BOG in LNG fuel compartment, it is allowed to be converted into the electric energy that navigation promotes in the process and service is required, on the one hand also fully
The energy is utilized, avoids the waste of BOG, BOG accomplishes zero-emission under nominal situation.On the other hand solve LNG fuel compartment because
BOG largely gathers the danger for generating hypertonia, delays the rate of pressure rise of LNG fuel compartment significantly, is conducive to control LNG fuel compartment
Pressure, extend LNG fuel compartment and hold time, so as to meeting " international using gas or other low-flash fuel ships
Safety regulation " (IGF CODE) require 15 days minimal maintenance time.
2, it uses room temperature BOG compressor: comparing cryogenic compressor, normal temperature compressed the had cost performance of machine is very high, tool
Have and safeguards simple, the convenient outstanding advantages of starting.
3, LNG booster pump uses the form of hydraulic-driven: compared to the pressurization for using explosion-proof electric machine driving in existing system
Pump, has many advantages, such as that equipment occupation space is small, investment of equipment is few, easy to maintenance using the booster pump of hydraulic-driven.Especially
The advantage that equipment is compact to design, size is small has special significance to the biggish ship of limited space.
Detailed description of the invention
Fig. 1 is the schematic diagram of the natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Referring to Fig. 1, the natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel of the invention, for ship
On gas equipment provide different pressures, temperature and flow gas fuel；Gas equipment includes marine main engine 21, generator
20 and boiler 19；Marine main engine 1 is using the ME-GI engine of graceful benefactor department, and device is using low speed two-stroke dual-fuel, supply gas pressure
300bar or so, 50 DEG C of feed air temperature；Generator 20 and boiler 19 are all made of four stroke dual-fuel of middling speed, and supply gas pressure 6bar is left
The right side, 50 DEG C of feed air temperature.Two kinds of fuel of bunker oil and LNG all can be used in marine main engine 1, generator 20 and boiler 19.
The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel of the invention includes LNG fuel compartment 1；LNG
Filling station 3, high pressure air feed system and low pressure air supply system.
LNG fuel compartment 1 uses IMO Type B film cabin, and the design pressure in cabin is 0.7barg, and minimum design temperature is -163
℃.The natural gas vent mast 6 that the top of LNG fuel compartment 1 is installed safety valve and connect with safety valve.
LNG filling station 3 includes the LNG filling pipeline 5 being connected to LNG fuel compartment 1 and the top for being connected to LNG fuel compartment 1
BOG return duct 4；There are two LNG filling stations 3 and is respectively located at the left and right side of a ship of ship；When LNG is filled, pass through LNG filler pipe
Road 5 is directly injected into LNG fuel compartment 1, while BOG is returned on the bank or filled ship by BOG return duct 4.
High pressure air feed system includes the LNG immersed pump 2 being located in LNG fuel compartment 1, by LNG delivery pipe and LNG immersed pump
The surge tank 11 of 2 outlet connection, the outlet of the surge tank 11 are connect with the import of high-pressure air feed pipeline 24, high-pressure air feed pipeline
LNG booster pump 22 and LNG high pressure gasifier 8 are successively installed, the outlet of the high-pressure air feed pipeline 24 passes through host gas valve on 24
Group 15 is connect with marine main engine 21.LNG booster pump 22 uses hydraulic-driven and is provided by individual hydraulic power unit for it dynamic
Power, or the hydraulic system for using marine main engine 1 included provide power for LNG booster pump 22.
The gas supply principle of high pressure air feed system is: LNG immersed pump 2 out of LNG fuel compartment 1 is extracted LNG out, is pressed and delivered to
In surge tank 11, the design pressure of surge tank 11 is 10barg；LNG, which enters LNG booster pump 22 from the outlet of surge tank 11, to carry out
Boosting, can be pressurized to 300bar for LNG highest, the gasification of LNG high pressure gasifier Final 8's system and heating are then sent to, after making gasification
Natural gas meet the combustion requirements of the needs of marine main engine 1, then flow to high-pressure air feed pipeline 24 and by host combustion gas valve group
15 use to the consumption of marine main engine 21.
Low pressure air supply system includes LNG gasification unit and BOG (evaporated natural gas) processing unit；Wherein:
LNG gasification unit includes the low pressure steam line 25 and be mounted on low pressure air supply pipe that the outlet with surge tank 11 connects
LNG low pressure gasifying device 12 on road 25, the outlet of the low pressure steam line 25 respectively with subsidiary engine combustion gas valve group 13 and boiler flue gas
Valve group 14 connects, and subsidiary engine combustion gas valve group 13 and boiler flue gas valve group 14 are connect with generator 19 and boiler 20 correspondingly；LNG
Low pressure gasifying device 12 can be by LNG forced gasification and heating, and the natural gas after making gasification meets what generator 19 and boiler 20 needed
Combustion requirements then flow to low pressure steam line 25, further depressurize respectively and transmission & distribution to subsidiary engine combustion gas valve group 13 and boiler
Combustion gas valve group 14, is provided to generator 19 and the consumption of boiler 20 uses.
BOG processing unit includes the BOG pipeline 26 connecting with the top of LNG fuel compartment 1, is mounted on BOG pipeline 26
The BOG gas-liquid separator 9 of the outlet connection of BOG heater 7 and BOG heater 7 is divided by BOG air inlet pipe 27 and BOG gas-liquid
The BOG compressor 10 of gas vent connection from device 9, the pressure being connect by BOG exhaust pipe 28 with the gas outlet of BOG compressor 10
Contracting machine export heat exchanger 23, the outlet of the compressor outlet heat exchanger 23 respectively with subsidiary engine combustion gas valve group 13 and boiler flue gas valve group
14 connections, subsidiary engine combustion gas valve group 13 and boiler flue gas valve group 14 are connect with generator 19 and boiler 20 correspondingly.
The course of work of BOG processing unit is: the low temperature BOG in LNG fuel compartment 1 first passes through BOG heater 7 and heats up
To 0 DEG C or more, BOG gas-liquid separator 9 is subsequently entered, the BOG come out from 9 gas vent of BOG gas-liquid separator is again by room temperature BOG
Compressor 10 is pressurized, pressurized gaseous-pressure not more than 10barg, and combustion gas passes through compressor outlet heat exchanger 23
Heating, is heated to 20~40 DEG C, then further respectively decompression and transmission & distribution to subsidiary engine combustion gas valve group 13 and boiler flue gas valve group 14,
It is finally provided to generator 19 and the consumption of boiler 20 uses.
LNG high pressure gasifier 8, LNG low pressure gasifying device 12, BOG heater 7 and compressor outlet heat exchanger 23 are by same
A Two-way Cycle heating system heats simultaneously use glycol water as heat transferring medium, avoid equipment corrosion and scaling and icing；It is double
Loop heating system includes glycol water expansion drum 16, sequentially connected with the liquid outlet of glycol water expansion drum 16
Glycol water delivery pump 18 and glycol water heater 17, the 17 liquid outlets difference of the glycol water heater
The import of the heat exchanger tube of import, LNG low pressure gasifying device 12 with the heat exchanger tube of LNG high pressure gasifier 8, the heat exchange of BOG heater 7
The import of pipe is connected with the import of the heat exchanger tube of compressor outlet heat exchanger 23；The outlet of the heat exchanger tube of LNG high pressure gasifier 8,
The outlet of the heat exchanger tube of LNG low pressure gasifying device 12, the outlet of the heat exchanger tube of BOG heater 7 and compressor outlet heat exchanger 23
The outlet of heat exchanger tube is connect with the inlet of glycol water expansion drum 16；Glycol water heater 17 uses boiler
20 steam generated are as heat transferring medium.
The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel of the invention has the following characteristics that
1) LNG in LNG fuel compartment 1 pumps 22 conveying and pressurization by LNG immersed pump 2 and LNG hydraulic booster, then passes through
LNG high pressure gasifier 8 and LNG low pressure gasifying device 12 are gasified and are heated up, and are provided and are met double fuel marine main engine 21, double fuel
The combustion gas of generator 19 and/or double fuel boiler 20 required pressure, temperature, flow；
2) BOG in LNG fuel compartment 1 is pressurizeed by room temperature BOG compressor 10, then by BOG heater 7 and BOG compressor
It exports heat exchanger 23 and adjusts temperature, the combustion for meeting double fuel engine machine 19 and/or boiler required pressure, temperature, flow is provided
Gas；
3) according to the requirement of IGF rule and classification society rule, the LNG being arranged between air supply system and gas equipment is conveyed
Pipe, high-pressure air feed pipeline 24, low pressure steam line 25, BOG pipeline 26, BOG air inlet pipe 27 and BOG exhaust pipe 28 are all made of double-walled
Pipe, and host combustion gas valve group 15, subsidiary engine combustion gas valve group 13 and boiler flue gas valve group 14 are respectively disposed at individual combustor
(GVU) it in, supplies for separating gas in time and prevents gas leakage from spreading；Host combustion gas valve group 15, subsidiary engine combustion gas valve group 13
Interlocking valve group is all made of with boiler flue gas valve group 14；
4) two LNG immersed pumps 2 of system configuration, LNG booster pump 22 and room temperature BOG compressor 10, when wherein a pump is sent out
Another work can be started when raw failure；
5) when double fuel engine machine 19 combustion gas mode work during, pass through room temperature BOG compressor 10 control LNG fuel compartment
1 pressure is in the pressure between 0~10kPa always；When marine main engine 21 and generator 19 do not work or stop in combustion gas mode
During only working, and when the pressure of LNG fuel compartment 1 is close to 70kPa, run under combustion gas mode by boiler 20, to consume BOG
To maintain to be greater than for a long time 15 days LNG fuel compartments 1 not boost (requirement of IGF rule), or even slowly decompression；
6) during LNG filling, room temperature BOG compressor 10 can be forced to convey BOG into the function of being back on the bank or fill ship；
Or two room temperature BOG compressors 10 work at the same time, pressure send extra BOG to double fuel engine machine and/or double fuel pot
Furnace consumes；
7) when the hypertonia of LNG fuel compartment or other special operation conditions, two room temperature BOG compressors 10 can work simultaneously
Make, making BOG treating capacity is more than one times of the evaporation capacity of LNG fuel compartment 1 or even several times or more, so as to quickly and effectively reduce
The pressure of LNG fuel compartment 1；
8) in normal conditions, the natural gas of 24 superpressure of general high voltage steam line discharge can return to low pressure LNG surge tank
In 13, the natural gas of 25 superpressure of low pressure steam line discharge be can return in LNG fuel compartment 1, avoid the waste of natural gas and to ring
The pollution in border；
9) under emergency work condition, LNG pipe-line system and relevant device (non-LNG fuel compartment) have dump natural gas extremely
It is vented the function of mast 6；
10) under emergency work condition, and in authorized situation, the emergency blow-down valve of LNG fuel compartment 1 can be opened manually,
Direct cold discharge boil-off gas extremely emptying mast 6；
11) when the setting value that the pressure of LNG fuel compartment 1 is more than safety valve, the peace of any one or more LNG fuel compartment 1
Full valve can discharge in time boil-off gas and control the pressure of LNG fuel compartment 1.
12) when LNG booster pump 22, which configures individual hydraulic power unit, provides power for it, hydraulic power unit can cloth
Safety zone aboard ship is set, requirement of explosion proof is not necessarily to.The design of LNG booster pump need to follow the specification and related guidance of marine main engine
File.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution also should belong to scope of the invention, should be limited by each claim.
Claims (9)
1. a kind of natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel, for being provided to the gas equipment on ship
The gas fuel of different pressures, temperature and flow；The gas equipment includes marine main engine, generator and boiler；The ship
Oceangoing ship host uses low speed two-stroke dual-fuel；The generator and boiler are all made of four stroke dual-fuel of middling speed；The high-low pressure
Integrated gas supply system includes LNG fuel compartment, LNG filling station, high pressure air feed system and low pressure air supply system；It is characterized in that,
The LNG fuel compartment is IMO Type B film cabin；
The filling station includes the LNG filling pipeline being connected to the LNG fuel compartment and the top for being connected to LNG fuel compartment
BOG return duct；
The high pressure air feed system includes the LNG immersed pump being located in the LNG fuel compartment, liquid of being dived by LNG delivery pipe and LNG
The surge tank of the outlet connection of pump, the outlet of the surge tank connect with the import of high-pressure air feed pipeline, on high-pressure air feed pipeline according to
The outlet of secondary installation LNG booster pump and LNG high pressure gasifier, the high-pressure air feed pipeline passes through host combustion gas valve group and the ship
Host connection；LNG highest can be pressurized to 300bar by the LNG booster pump；
The LNG booster pump uses hydraulic-driven and provides power by individual hydraulic power unit for it, the hydraulic power list
The safety zone of member arrangement aboard ship, or the hydraulic system for using marine main engine included provide power for the LNG booster pump；
The low pressure air supply system includes LNG gasification unit and BOG processing unit；
The LNG gasification unit includes the low pressure steam line and be mounted on low pressure steam line that the outlet with surge tank connects
LNG low pressure gasifying device, the outlet of the low pressure steam line is connect with subsidiary engine combustion gas valve group and boiler flue gas valve group respectively, described
Subsidiary engine combustion gas valve group and boiler flue gas valve group are connect with the generator and boiler correspondingly；
The BOG processing unit includes the BOG pipeline connecting with the top of the LNG fuel compartment, is mounted on BOG pipeline
The BOG gas-liquid separator of the outlet connection of BOG heater and BOG heater passes through BOG air inlet pipe and BOG gas-liquid separator
The BOG compressor of gas vent connection is exchanged heat by the compressor outlet that BOG exhaust pipe is connect with the gas outlet of BOG compressor
Device, the outlet of the compressor outlet heat exchanger are connect with subsidiary engine combustion gas valve group and boiler flue gas valve group respectively, the subsidiary engine combustion gas
Valve group and boiler flue gas valve group are connect with the generator and boiler correspondingly；The BOG heater can be LNG fuel compartment
Interior evaporated natural gas is warming up to 0 DEG C or more；The BOG compressor is room temperature BOG compressor and can be the pressure of evaporated natural gas
Power is pressurized to no more than 10bar；The temperature of pressurized evaporated natural gas is heated to 20 by the compressor outlet heat exchanger~
40℃。
2. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In the LNG high pressure gasifier, LNG low pressure gasifying device, BOG heater and compressor outlet heat exchanger are followed by same pair
Ring heating system heats simultaneously use glycol water as heat transferring medium；The Two-way Cycle heating system includes that ethylene glycol is water-soluble
It is liquid expansion drum, water-soluble with the sequentially connected glycol water delivery pump of liquid outlet and ethylene glycol of glycol water expansion drum
Liquid heater, the liquid outlet of the glycol water heater are low with the import of the heat exchanger tube of LNG high pressure gasifier, LNG respectively
Press the heat exchanger tube of the import of heat exchanger tube of gasifier, the import of the heat exchanger tube of BOG heater and compressor outlet heat exchanger into
Mouth connection；The outlet of the heat exchanger tube of the LNG high pressure gasifier, the outlet of the heat exchanger tube of LNG low pressure gasifying device, BOG heater
Heat exchanger tube outlet and compressor outlet heat exchanger heat exchanger tube inlet of the outlet with glycol water expansion drum
Connection；The steam that the glycol water heater is generated using the boiler is as heat transferring medium.
3. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In there are two the LNG filling stations and is respectively located at the left and right side of a ship of ship；The BOG return duct on the bank or filling ship connect
It connects.
4. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In the LNG immersed pump, LNG booster pump and room temperature BOG compressor configure two, wherein one is spare；When LNG fuel
When the pressure in cabin is more than setting value, two room temperature BOG compressors are worked at the same time.
5. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In the natural gas vent mast that the top of the LNG fuel compartment is installed safety valve and connect with safety valve.
6. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
During the generator is in the work of combustion gas mode, always by the pressure of the BOG compressor control LNG fuel compartment
In 0~10kPa.
7. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In when the marine main engine and generator be not during combustion gas mode works or stops working, and the pressure of LNG fuel compartment is close
When 70kPa, run under combustion gas mode by boiler, to consume BOG.
8. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In the host combustion gas valve group, subsidiary engine combustion gas valve group and boiler flue gas valve group are all made of interlocking valve group and are respectively disposed at one
In individual combustor.
9. the natural gas high-low pressure integrated gas supply system of large size double fuel Power Vessel according to claim 1, feature exist
In the high-pressure air feed pipeline and low pressure steam line are all made of double-wall pipe.
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| CN201811063197.8A CN109185693A (en) | 2018-09-12 | 2018-09-12 | The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel |
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| CN201811063197.8A CN109185693A (en) | 2018-09-12 | 2018-09-12 | The natural gas high-low pressure integrated gas supply system of large-scale double fuel Power Vessel |
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Application publication date: 20190111 |