CN107339610A - A kind of seagoing vessel LNG fuel high pressures air supply system and its control method - Google Patents

A kind of seagoing vessel LNG fuel high pressures air supply system and its control method Download PDF

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Publication number
CN107339610A
CN107339610A CN201710742866.3A CN201710742866A CN107339610A CN 107339610 A CN107339610 A CN 107339610A CN 201710742866 A CN201710742866 A CN 201710742866A CN 107339610 A CN107339610 A CN 107339610A
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CN
China
Prior art keywords
storage tank
lng
lng storage
inert gas
pipe
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Pending
Application number
CN201710742866.3A
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Chinese (zh)
Inventor
吴卫东
林晓辉
代建涛
董先虎
田丽军
张敏
白鸥
代丰
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Chengdu Huaqi Houpu Holding Co Ltd
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Chengdu Huaqi Houpu Holding Co Ltd
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Priority to CN201710742866.3A priority Critical patent/CN107339610A/en
Publication of CN107339610A publication Critical patent/CN107339610A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0395—Localisation of heat exchange separate using a submerged heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/061—Fluid distribution for supply of supplying vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a kind of seagoing vessel LNG fuel high pressure air supply systems, it is characterised in that the LNG that it includes being arranged on ship deck, which fills storage system and is arranged on marine fuel, prepares interior fuel feed system；The LNG that the LNG fills storage system and includes LNG storage tank and be connected to by pipeline and valve in LNG storage tank fills process system, the LNG, which fills process system, includes storage tank inerting pipe-line system, storage tank precooling pipe-line system, gas displacement pipe-line system, the fuel feed system is connected and puts LNG storage tank and ship gas engine respectively by pipeline and valve, and the fuel feed system includes force (forcing) pump, vaporizer；The LNG storage tank is sequentially connected force (forcing) pump, vaporizer, ship gas engine by pipeline and valve.The high pressure air feed system can be to be supplied using the ship of gas engine.Improve existing diesel engine pollution on the environment.

Description

A kind of seagoing vessel LNG fuel high pressures air supply system and its control method
Technical field
The present invention relates to seagoing vessel fuel to supply field, a kind of seagoing vessel LNG fuel high pressures air supply system of feature and its controlling party Method.
Background technology
The fast development of World Economics, quick increase of the world to energy demand is triggered.Natural gas is with its cleaning, side Just, efficient characteristic turns into Substitute coal, the most suitable high-quality novel energy of oil.Will with the rise and discharge of international oil price Ask increasingly strict, the use of natural gas turns into the inexorable trend in each field.
In spot ship, mainly based on diesel engine, in diesel combustion process, strong black smoke can be produced, it is right Environment pollutes.Because shipping frequently involves transported across country, the diesel engine of country variant is good and bad different, therefore can be to ring Border produces different degrees of pollution, causes many ship discharge standards not up to standard, and then limits and enter some countries.
Natural gas with its cleaning, conveniently, efficient characteristic, can solve the problem that environmental pollution caused by ship burning diesel oil.
The content of the invention
It is an object of the invention to：For above-mentioned problem, there is provided a kind of seagoing vessel LNG fuel high pressures air supply system and Device control method, the high pressure air feed system can be to be supplied using the ship of gas engine.Improve existing diesel engine Machine pollution on the environment.
The technical solution adopted by the present invention is as follows：
The invention discloses a kind of seagoing vessel LNG fuel high pressure air supply systems, it is characterised in that it includes being arranged on ship deck LNG fill storage system and be arranged on marine fuel prepare in fuel feed system；
The LNG that the LNG fills storage system and includes LNG storage tank and be connected to by pipeline and valve in LNG storage tank fills work Process system, the LNG, which fills process system, to be included：
Storage tank inerting pipe-line system, normal temperature inert gas is filled with LNG storage tank, discharges the air in LNG storage tank；
Storage tank precooling pipe-line system, cryogenic inert gas is filled with LNG storage tank cooling LNG storage tank, discharges the normal temperature in LNG storage tank Inert gas；
Gas displacement pipe-line system, low temperature CNG is filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
LNG fills pipe-line system, and LNG is filled with into LNG storage tank is stored；
The fuel feed system is connected and puts LNG storage tank and ship gas engine respectively by pipeline and valve, the fuel Feed system includes force (forcing) pump, vaporizer；The LNG storage tank is sequentially connected force (forcing) pump, vaporizer, ship by pipeline and valve Gas engine.
Due to said structure, process system is filled by LNG LNG is stored, then again by the LNG of storage through over pressurizeed vapour Ship gas engine is sent to after change, completes the process of whole gas engine fuel supply.
LNG storage tank, ensure that has enough fuel on ship.Fill in process system, to storage tank carry out inerting, precooling, Displacement；Inerting can detect in advance whole pipe-line system whether gas leakage, inert gas is safe and reliable, and combustion will not be produced because of gas leakage Decrepitate is fried.Precooling, avoid LNG and be vaporized in storing process；Displacement, ensure that LNG is stored in LNG storage tank, LNG's is pure Degree.
Force (forcing) pump makes LNG pressurize, and is forced into 20 ~ 30MPa, ensures transportation demand.
Further, storage tank inerting pipe-line system includes normal temperature inert gas interface, the air discharge connected with LNG storage tank Mouth, oxygen content detection interface；
Storage tank precooling pipe-line system includes the cryogenic inert gas interface and normal temperature inert gas outlet connected with LNG storage tank, The LNG storage tank temperature-detecting device being arranged in LNG storage tank；
Low temperature CNG interfaces, cryogenic inert gas outlet, the low temperature that gas displacement pipe-line system includes connecting with LNG storage tank are lazy Property gas content detection interface；
LNG fills the LNG interfaces that pipe-line system includes connecting with LNG storage tank.
Further, in fuel feed system, surge tank is also associated between vaporizer and ship gas engine；And vaporize Supply air line temperature-detecting device and supply air line pressure-detecting device are additionally provided between device and surge tank.
Due to said structure, surge tank can avoid high pressure CNG from impacting ship gas engine, supply air line temperature Detection means and supply air line pressure detecting CNG temperature and pressure are spent, ensures the normal work of fuel feed system.
Further, the LNG storage tank is connected by drain pipe with the force (forcing) pump in fuel feed system, and the drain pipe On be also associated with liquid back pipe, the liquid back pipe is linked back to LNG storage tank；Muffler, the return-air are also associated with the force (forcing) pump Pipe is connected to LNG storage tank；Between the force (forcing) pump and vaporizer, force (forcing) pump back pressure emptying pipeline is also set up.
Due to said structure, liquid back pipe can make unnecessary LNG stream return LNG storage tank, avoid drain pipe outflow LNG mistake It is more, influence the pump work that pressurizes；During pressurization pump work, BOG bogs can be produced, the gas can return to LNG by muffler Stored in storage tank, avoid waste of fuel.Force (forcing) pump downstream sets force (forcing) pump back pressure emptying pipeline, can be easy to force (forcing) pump Start.
Further, storage tank is also associated with the LNG storage tank and safeguards pipe-line system, the storage tank pipe-line system is by inertia Gas is filled with LNG storage tank, discharges the LNG in LNG storage tank；Storage tank safeguards that pipe-line system includes the storage tank dimension connected with LNG storage tank Shield inert gas interface, storage tank safeguard that LNG outlets, storage tank safeguard LNG content detection interfaces.
Due to said structure, storage tank safeguards the LNG in pipe-line system emptying LNG storage tank, is easy to safeguard storage tank, protects Demonstrate,prove the safety in maintenance process.
Further, fuel feed line maintenance system, the fuel supply are also associated with the fuel feed system Inert gas is filled with fuel feed system by pipeline maintenance system, discharges the CNG in fuel feed system；The fuel feed pipe Road maintenance system includes the fuel feed line inert gas interface and fuel feed line CNG being connected in fuel feed system Outlet.
Due to said structure, fuel feed system empties the CNG in fuel feed system, is easy to enter fuel feed system Row is safeguarded, ensures the safety in maintenance process.
The invention also discloses a kind of control method of seagoing vessel LNG fuel high pressure air supply systems, the control method is included such as Lower step：
Step 1：Storage tank inerting, normal temperature inert gas is filled with LNG storage tank, discharges the air in LNG storage tank；
Step 2：Storage tank precooling, cryogenic inert gas is filled with LNG storage tank cooling storage tank, discharges the normal temperature inertia in LNG storage tank Gas；
Step 3：Gas displacement, low temperature CNG is filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
Step 4：LNG is filled, and LNG is filled with into LNG storage tank is stored；
Step 5：Fuel is supplied, and the LNG in LNG storage tank is sent into ship gas engine after over pressurizeed vaporizes.
In above-mentioned steps, storage tank inerting, can detect storage tank whether gas leakage；Storage tank precooling, LNG can be avoided to fill It is vaporized in journey；Gas displacement, it ensure that purity during LNG storages.
Further, during storage tank inerting, inerting completion after oxygen content≤1% in LNG storage tank；
In storage tank precooling process, temperature drop rate is 10 DEG C/h, and precooling is completed behind LNG storage tank internal temperature≤- 145 DEG C；
During gas displacement, the rear substitution of inert gas content in LNG storage tank≤10% is completed；
In fuel supply process, after LNG vaporization, CNG pressure should control should control at 5 ~ 15 DEG C in 25 ~ 30MPa, CNG temperature.
Further, the control method also includes storage tank maintenance control method, in storage tank maintenance process, by indifferent gas Body is passed through LNG storage tank, discharges the LNG in LNG storage tank, stops ventilation after LNG contents in LNG storage tank≤1%.
Further, the control method also includes fuel feed system maintenance control method, is tieed up in fuel feed system During shield, inert gas is passed through vaporizer and surge tank, discharges the CNG in vaporizer and surge tank；When inert gas leads to Stop ventilation after the angle of incidence >=3min.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The present invention can be to be supplied using the ship of gas engine.Improve diesel engine in spot ship to make environment Into pollution.
The seagoing vessel LNG fuel high pressure air supply systems of the present invention, LNG fill storing process and fuel supply process safety and stability Reliably.Easy access simultaneously is safeguarded.
Brief description of the drawings
Fig. 1 is the system construction drawing of the present invention；
The LNG that Fig. 2 is the present invention fills memory system architecture figure；
Fig. 3 is the fuel feed system structure chart of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
As described in Figure,
The invention discloses a kind of seagoing vessel LNG fuel high pressure air supply systems, and the LNG that it includes being arranged on ship deck, which is filled, to be deposited Storage system and the fuel feed system being arranged in marine fuel preparation；
The LNG that the LNG fills storage system and includes LNG storage tank and be connected to by pipeline and valve in LNG storage tank fills work Process system, the LNG fill storage tank inerting pipe-line system, the storage tank precooling pipeline that process system includes being connected in LNG storage tank System, gas displacement pipe-line system and LNG fill pipe-line system；
The storage tank inerting pipe-line system is used to normal temperature inert gas being filled with LNG storage tank, discharges the air in LNG storage tank；
The storage tank precooling pipe-line system is used to cryogenic inert gas being filled with LNG storage tank cooling LNG storage tank, discharges LNG storage tank Interior normal temperature inert gas；
The gas displacement pipe-line system is used to low temperature CNG being filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
Shown LNG fills pipe-line system and stored for LNG to be filled with into LNG storage tank；
The number of the LNG storage tank can be one or more, and in the present embodiment, the number of LNG storage tank is 2 as shown in Figure 1 LNG storage tank I and LNG storage tank II, the LNG storage tank are disposed side by side on the left and right sides of ship deck；
LNG, which fills process system, includes liquid-phase tube 1 and gas phase pipe 2, and liquid-phase tube 1 and gas phase pipe 2 are connected by pipeline and valve respectively It is connected to LNG storage tank I and LNG storage tank II;Liquid-phase tube 1 also connects outlet V1, and liquid with valve with gas phase pipe 2 by pipeline simultaneously It is also associated with detecting interface SP on phase pipe 1.
Liquid-phase tube 1 includes larboard liquid phase interface L1 and starboard liquid phase interface L11, and gas phase pipe 2 includes larboard gas phase interface L2 With starboard gas phase interface L22；Two liquid and gas interfaces are set, are easy to ship to fill storage natural gas from different surveys.
Normal temperature inert gas interface that the storage tank inerting pipe-line system includes connecting with LNG storage tank, air outlet and it is used for Detect the oxygen content detection interface of oxygen content in LNG storage tank；
Gas displacement pipe-line system include connected with LNG storage tank low temperature CNG interfaces, cryogenic inert gas outlet, for examining Survey the cryogenic inert gas content detection interface of cryogenic inert gas content in LNG storage tank；
Wherein, storage tank inerting pipe-line system and gas replacement piping system share a pipe-line system, i.e. normal temperature inert gas connects Mouth and low temperature CNG interfaces are the larboard gas phase interface L2 and starboard gas phase interface L22 of gas phase pipe 2；Air outlet and low temperature Inert gas outlet is outlet V1；Oxygen content detects interface and cryogenic inert gas content detection interface is detection Interface SP.
The storage tank precooling pipe-line system includes the cryogenic inert gas interface and normal temperature inert gas connected with LNG storage tank Outlet, the LNG storage tank temperature-detecting device being arranged in LNG storage tank；
Wherein cryogenic inert gas interface is larboard liquid phase interface L1 and starboard liquid phase interface L11；Normal temperature inert gas outlet Outlet V1；Temperature-detecting device is provided with two LNG storage tanks, and temperature-detecting device is provided with one or more, this In embodiment, 3 temperature-detecting devices are provided with each storage tank.
The LNG fills the LNG interfaces that pipe-line system includes connecting with LNG storage tank.The LNG interfaces are that larboard liquid phase connects Mouth L1 and starboard liquid phase interface L11.
In the present embodiment, two LNG storage tanks are provided with, increase ship LNG amount of storage.Two LNG storage tank parts simultaneously Can mutually it switch, when a LNG storage tank c maintenance, another LNG storage tank can also work on.Two storage tanks are simultaneously Work can also increase, LNG storage efficiencies and fuel gas supply efficiency.
The fuel feed system is connected and puts LNG storage tank and ship gas engine respectively by pipeline and valve, described Fuel feed system includes force (forcing) pump, vaporizer, surge tank, the LNG storage tank I and LNG storage tank II by pipeline and valve according to It is secondary to be connected to ship gas engine by force (forcing) pump, vaporizer, surge tank.
Supply air line temperature-detecting device 3 and supply air line pressure-detecting device 4 are additionally provided between vaporizer and surge tank.
The LNG storage tank is connected by drain pipe with the force (forcing) pump M in fuel feed system, and is also connected on the drain pipe 5 Liquid back pipe 6 is connected to, the liquid back pipe 6 is linked back to NG storage tanks I and LNG storage tank II；Muffler 7 is also associated with the force (forcing) pump, The muffler 7 is connected to NG storage tanks I and LNG storage tank II；Between the force (forcing) pump M and vaporizer, force (forcing) pump back pressure row is also set up Blank pipe road 8.
Storage tank is also associated with the LNG storage tank and safeguards pipe-line system, inert gas is filled with by the storage tank pipe-line system LNG storage tank, discharge the LNG in LNG storage tank；
The storage tank that storage tank safeguards pipe-line system and includes connecting with LNG storage tank safeguards that inert gas interface, storage tank safeguard that LNG is discharged Mouth, storage tank safeguard LNG content detection interfaces.
Wherein storage tank safeguards that inert gas interface is larboard gas phase interface L2 and starboard gas phase interface L22；Storage tank safeguards LNG Outlet is outlet V1, and storage tank safeguards LNG content detections interface for detection interface SP.
Further, fuel feed line maintenance system, the fuel supply are also associated with the fuel feed system Inert gas is filled with fuel feed system by pipeline maintenance system, discharges the CNG in fuel feed system；
The fuel feed line inert gas that the fuel feed line maintenance system includes being connected in fuel feed system connects Mouth L3 and fuel feed line CNG outlets V2.
Wherein fuel feed line inert gas interface is arranged on the force (forcing) pump M port of export, feeding pipe CNG outlets V2 Be arranged on vaporizer, surge tank and force (forcing) pump back pressure emptying pipeline 8 the port of export, and respectively with vaporizer, surge tank and pressurization The port of export of pump back pressure emptying pipeline 8 is connected.
The control method of the seagoing vessel LNG fuel high pressure air supply systems, comprises the following steps：
Step 1：Storage tank inerting, normal temperature inert gas is filled with LNG storage tank, discharges the air in LNG storage tank；
Step 2：Storage tank precooling, cryogenic inert gas is filled with LNG storage tank cooling storage tank, discharges the normal temperature inertia in LNG storage tank Gas；
Step 3：Gas displacement, low temperature CNG is filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
Step 4：LNG is filled, and LNG is filled with into LNG storage tank is stored；
Step 5：Fuel is supplied, and the LNG in LNG storage tank is sent into gas engine after pressurized gasification.
During storage tank inerting, control valve opening and closing, warm inert gas is entered from L22 (L2), flow through valve F10 successively (F12), F14 (F18) enters LNG storage tank I (LNG storage tank II), air is flowed through valve F13 (F17), F2 (F4), F6 successively (F8) discharged after from V1.Then the oxygen content in LNG storage tank is detected at detection mouth SP, inerting is complete after oxygen content≤1% Into；During inerting, two storage tanks can together inerting, or independent inerting.Together during inerting, detection mouth SP detections are two Oxygen content in storage tank.
In storage tank precooling process, control valve opening and closing, cryogenic inert gas is entered from L1 (L11), flow through valve successively F5 (F1), F4 (F2), F17 (13) enter LNG storage tank II afterwards（LNG storage tank I）, normal temperature inert gas is flowed through valve F18 successively (F14), discharged after F9 (F7) from V1.The temperature in LNG storage tank is detected, when all temperature-detecting devices detect in LNG storage tank Temperature value≤- 145 DEG C after precooling complete；And temperature drop rate is 10 DEG C/h.In precooling process, two storage tanks can be with one Same precooling, or independent precooling.Together during precooling, temperature in two storage tanks≤- 145 DEG C after precooling just complete.
During gas displacement, control valve opening and closing, low temperature CNG is entered from L22 (L2), flow through valve F10 successively (F12), F14 (F18) enters LNG storage tank I (LNG storage tank II), cryogenic inert gas is flowed through valve F13 (F17), F2 successively (F4), discharged after F6 (F8) from V1.Then the inert gas content in LNG storage tank is detected at detection mouth SP, when in LNG storage tank The rear substitution of inert gas content≤10% complete；
In replacement process, two storage tanks can be replaced together, or individually displacement.When together replacing, detection mouth SP detections are two Inert gas content in individual storage tank.
In fuel supply process, after LNG vaporization, CNG pressure should control should control 5 ~ 15 in 25 ~ 30MPa, CNG temperature ℃.After CNG meets above-mentioned parameter setting, F27 is just opened, and is that CNG enters ship gas engine.
In fuel supply process, before the pump startup that pressurizes, valve F23 is first opened, after the back pressure for making force (forcing) pump for 1 ~ 2 second is 0, Starting force (forcing) pump.
The control method also includes storage tank maintenance control method, and in storage tank maintenance process, inert gas is passed through into LNG Storage tank, the LNG in LNG storage tank is discharged, stop ventilation after LNG contents in LNG storage tank≤1%.（Pipeline circulates and valve control System is the same as storage tank inerting process.）Two storage tanks can also be safeguarded individually or together.
The control method also includes fuel feed system maintenance control method, in fuel feed system maintenance process, Inert gas is passed through vaporizer and surge tank from fuel feed line inert gas interface L3, discharged in vaporizer and surge tank CNG（Discharged from V2）；Stop ventilation after inert gas is passed through time >=3min.
In the present embodiment, inert gas is nitrogen.Force (forcing) pump M is plunger pump, and vaporizer is water-bath type heat exchanger.LNG Storage tank is individual layer tank, deep well pump is set in LNG storage tank, for LNG to be extruded out of LNG storage tank.
Force (forcing) pump, vaporizer, surge tank in fuel feed system are arranged in marine fuel preparation, between fuel prepares Ventilation unit need to be set, and ventilation is not less than 30 times/hour.
Fuel gas pipeline is connected through cabin with ship gas engine, and cabin is also required to set ventilation unit, and leads at this Wind apparatus is connected by double-wall pipe with cabin, and both arms pipe outer tube design pressure is not less than inner tube design pressure, and ventilation is not small In 30 times/hour.
The liquid phase interface of the present invention, gas phase interface, near LNG storage tank, between fuel prepares, combustion gas is provided with cabin and is let out Leak detection sensor, the gas leakage detection sensor connection is controlled by controller, and acousto-optic report is also associated with controller Alert device, the audible-visual annunciator are corresponding with gas leakage detection sensor quantity with quantity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.

Claims (10)

1. a kind of seagoing vessel LNG fuel high pressure air supply systems, it is characterised in that the LNG that it includes being arranged on ship deck is filled Storage system and the fuel feed system being arranged in marine fuel preparation；
The LNG that the LNG fills storage system and includes LNG storage tank and be connected to by pipeline and valve in LNG storage tank fills work Process system, the LNG, which fills process system, to be included：
Storage tank inerting pipe-line system, normal temperature inert gas is filled with LNG storage tank, discharges the air in LNG storage tank；
Storage tank precooling pipe-line system, cryogenic inert gas is filled with LNG storage tank cooling LNG storage tank, discharges the normal temperature in LNG storage tank Inert gas；
Gas displacement pipe-line system, low temperature CNG is filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
LNG fills pipe-line system, and LNG is filled with into LNG storage tank is stored；
The fuel feed system is connected and puts LNG storage tank and ship gas engine respectively by pipeline and valve, the fuel Feed system includes force (forcing) pump, vaporizer；The LNG storage tank is sequentially connected force (forcing) pump, vaporizer, ship by pipeline and valve Gas engine.
2. seagoing vessel LNG fuel high pressure air supply systems according to claim 1, it is characterised in that：
Storage tank inerting pipe-line system includes normal temperature inert gas interface, air outlet, the oxygen content inspection connected with LNG storage tank Survey interface；
Storage tank precooling pipe-line system includes the cryogenic inert gas interface and normal temperature inert gas outlet connected with LNG storage tank, The LNG storage tank temperature-detecting device being arranged in LNG storage tank；
Low temperature CNG interfaces, cryogenic inert gas outlet, the low temperature that gas displacement pipe-line system includes connecting with LNG storage tank are lazy Property gas content detection interface；
LNG fills the LNG interfaces that pipe-line system includes connecting with LNG storage tank.
3. seagoing vessel LNG fuel high pressure air supply systems according to claim 2, it is characterised in that：In fuel feed system, vapour Change and be also associated with surge tank between device and ship gas engine；And the inspection of supply air line temperature is additionally provided between vaporizer and surge tank Survey device and supply air line pressure-detecting device.
4. seagoing vessel LNG fuel high pressure air supply systems according to claim 3, it is characterised in that：The LNG storage tank is by going out Liquid pipe is connected with the force (forcing) pump in fuel feed system, and liquid back pipe is also associated with the drain pipe, the liquid back pipe be linked back to LNG storage tank；Muffler is also associated with the force (forcing) pump, the muffler is connected to LNG storage tank；The force (forcing) pump and vaporizer Between, also set up force (forcing) pump back pressure emptying pipeline.
5. seagoing vessel LNG fuel high pressure air supply systems according to claim 4, it is characterised in that：Also connect in the LNG storage tank It is connected to storage tank and safeguards pipe-line system, inert gas is filled with LNG storage tank by the storage tank pipe-line system, is discharged in LNG storage tank LNG；
The storage tank that storage tank safeguards pipe-line system and includes connecting with LNG storage tank safeguards that inert gas interface, storage tank safeguard that LNG is discharged Mouth, storage tank safeguard LNG content detection interfaces.
6. seagoing vessel LNG fuel high pressure air supply systems according to claim 5, it is characterised in that：The fuel feed system In be also associated with fuel feed line maintenance system, inert gas is filled with fuel and supplied by the fuel feed line maintenance system System, discharge the CNG in fuel feed system；
The fuel feed line inert gas that the fuel feed line maintenance system includes being connected in fuel feed system connects Mouth and fuel feed line CNG outlets.
7. a kind of control method of seagoing vessel LNG fuel high pressure air supply systems, it is characterised in that the control method includes following step Suddenly：
Step 1：Storage tank inerting, normal temperature inert gas is filled with LNG storage tank, discharges the air in LNG storage tank；
Step 2：Storage tank precooling, cryogenic inert gas is filled with LNG storage tank cooling storage tank, discharges the normal temperature inertia in LNG storage tank Gas；
Step 3：Gas displacement, low temperature CNG is filled with LNG storage tank, discharges the cryogenic inert gas in LNG storage tank；
Step 4：LNG is filled, and LNG is filled with into LNG storage tank is stored；
Step 5：Fuel is supplied, and the LNG in LNG storage tank is sent into ship gas engine after over pressurizeed vaporizes.
8. the control method of seagoing vessel LNG fuel high pressure air supply systems according to claim 7, it is characterised in that：
During storage tank inerting, inerting completion after oxygen content≤1% in LNG storage tank；
In storage tank precooling process, temperature drop rate is 10 DEG C/h, and precooling is completed behind LNG storage tank internal temperature≤- 145 DEG C；
During gas displacement, the rear substitution of inert gas content in LNG storage tank≤10% is completed；
In fuel supply process, after LNG vaporization, CNG pressure should control should control at 5 ~ 15 DEG C in 25 ~ 30MPa, CNG temperature.
9. the control method of seagoing vessel LNG fuel high pressure air supply systems according to claim 8, it is characterised in that：The control Method processed also includes storage tank maintenance control method, and in storage tank maintenance process, inert gas is passed through into LNG storage tank, discharge LNG storages LNG in tank, stop ventilation after LNG contents in LNG storage tank≤1%.
10. the control method of seagoing vessel LNG fuel high pressure air supply systems according to claim 9, it is characterised in that：The control Method processed also includes fuel feed system maintenance control method, and in fuel feed system maintenance process, inert gas is passed through Vaporizer and surge tank, discharge the CNG in vaporizer and surge tank；Stop ventilation after inert gas is passed through time >=3min.
CN201710742866.3A 2017-08-25 2017-08-25 A kind of seagoing vessel LNG fuel high pressures air supply system and its control method Pending CN107339610A (en)

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