CN108006432A - A kind of LNG bank bases formula loading system peculiar to vessel - Google Patents

A kind of LNG bank bases formula loading system peculiar to vessel Download PDF

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Publication number
CN108006432A
CN108006432A CN201711344837.8A CN201711344837A CN108006432A CN 108006432 A CN108006432 A CN 108006432A CN 201711344837 A CN201711344837 A CN 201711344837A CN 108006432 A CN108006432 A CN 108006432A
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CN
China
Prior art keywords
lng
storage tank
charging line
gas
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711344837.8A
Other languages
Chinese (zh)
Inventor
汪至清
刘政
张光明
胡志强
何晓强
项菊
于海洋
郭慧君
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Jereh Oil and Gas Engineering Corp
Original Assignee
Jereh Oil and Gas Engineering Corp
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Filing date
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Priority to CN201711344837.8A priority Critical patent/CN108006432A/en
Publication of CN108006432A publication Critical patent/CN108006432A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C5/00Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/002Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/032Hydrocarbons
    • F17C2221/033Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2227/00Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01Propulsion of the fluid
    • F17C2227/0128Propulsion of the fluid with pumps or compressors
    • F17C2227/0135Pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2227/00Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04Methods for emptying or filling
    • F17C2227/046Methods for emptying or filling by even emptying or filling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04Indicating or measuring of parameters as input values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04Indicating or measuring of parameters as input values
    • F17C2250/0404Parameters indicated or measured
    • F17C2250/0408Level of content in the vessel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04Indicating or measuring of parameters as input values
    • F17C2250/0404Parameters indicated or measured
    • F17C2250/0439Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/04Reducing risks and environmental impact
    • F17C2260/044Avoiding pollution or contamination
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2265/00Effects achieved by gas storage or gas handling
    • F17C2265/06Fluid distribution

Landscapes

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

Abstract

The present invention provides a kind of LNG bank bases formula loading system peculiar to vessel, including by note ship, storage system, loading system, purge system, pump sledge system and auxiliary system, the auxiliary system includes providing the monitoring control system of the instrument wind system of source of the gas power and pressure, temperature, liquid level, flow and the gas leakage of monitoring system etc. to the operated pneumatic valve of whole system.Present invention mainly solves filling time length, BOG wastages are big, and the technical problem such as cumbersome, solves the problems, such as the LNG fuel addings to shippping traffic so that remaining without raffinate after the completion of filling, safe, working specification.

Description

A kind of LNG bank bases formula loading system peculiar to vessel
Technical field
The present invention relates to Gas Industry field, is to be related to a kind of LNG bank bases formula loading system peculiar to vessel specifically.
Background technology
Liquefied natural gas (Liquefied Natural Gas, usually represented with LNG), as a kind of green clean energy resource, It is one of substitute of traditional fuel.With attention of the people to environmental protection, discharge limitation is more and more stringenter, and International Maritime Tissue and national governments to putting into effect and coming into force as defined in ship emission control, more and more ships using LNG as fuel, with Reach discharge standard.
But the filling problem of LNG fuels and energy ships is exactly immediate problem needed to be considered.Substantially adopted outside Current Domestic Filled with tank car, but when tank car is filled to LNG Power Vessels, it is necessary to time length, and (Boiled Off Gas, are BOG Referring to LNG liquid passively by the gas after thermal evaporation) wastage is big, and cumbersome, degree of safety is low, and causes serious economic wave Take.
The content of the invention
It is an object of the invention to overcome the shortcoming of above-mentioned conventional art, there is provided a kind of LNG bank bases formula filling peculiar to vessel System, mainly solves filling time length, BOG wastages are big, and the technical problem such as cumbersome, solves to shippping traffic LNG fuel adding problems so that remaining without raffinate after the completion of filling, safe, working specification.
The purpose of the present invention is what is reached by following technical measures:A kind of LNG bank bases formula loading system peculiar to vessel, including by Note ship, it is characterised in that:Including storage system, loading system, purge system, pump sledge system and auxiliary system, the auxiliary system System include to the operated pneumatic valve of whole system provide source of the gas power instrument wind system and the pressure of monitoring system, temperature, liquid level, The monitoring control system of flow and gas leakage etc..
Further, the storage system includes being used for the LNG low-temperature storage tanks for storing LNG liquid and BOG gases, described BOG gases refer to LNG liquid passively by the gas after thermal evaporation, and the LNG low-temperature storage tanks are equipped with storage tank under inlet, storage tank Inlet, storage tank liquid outlet, storage tank gas returning port, storage tank gas phase mouth and storage tank BOG outlets, the upper inlet are equipped with spray and fill Put.
Further, the LNG low-temperature storage tanks are equipped with the liquid level gauge and pressure gauge of measurement liquid level.
Further, the number of the LNG low-temperature storage tanks is at least one.
Further, the loading system includes the gentle phase charging line of liquid phase charging line, the liquid phase charging line In be equipped with servicing fluids multi-phase flowmeter, be equipped with filling gas phase flow rate meter in the gas phase charging line, the liquid phase charging line and Pull breaking ualve is respectively connected with gas phase charging line, the liquid phase charging line, gas phase charging line are connected with by note ship.
Further, the purge system includes nitrogen cylinder, blow gasifier and purging surge tank, the purge system bag Include scavenging pipeline, the scavenging pipeline includes natural gas scavenging pipeline and nitrogen sparge tube road, the nitrogen sparge tube road into Mouth is connected with nitrogen cylinder, and the outlet on the nitrogen sparge tube road is connected with liquid phase charging line, gas phase charging line, described natural The outlet of gas scavenging pipeline is all connected with the gentle phase charging line of liquid phase charging line.
Further, including pipe-line system, the pipe-line system include precooling pipeline, the outlet and storage of the precooling pipeline Inlet connects under inlet, storage tank on tank, and the import of the precooling pipeline is connected with liquid phase charging line, the pipe-line system Including circulation line, inlet connects under inlet, storage tank in the outlet of the circulation line and storage tank, the pipe-line system bag Pressure piping is included, the pressure piping is connected with pump pond liquid outlet, and the pressure piping is connected with storage tank gas phase mouth.
Further, the pump sledge system includes LNG pump pond, LNG immersed pumps, the LNG pump being housed in the LNG pump pond Pond is equipped with pump pond inlet, pump pond liquid outlet and pump pond gas returning port, and the pump pond inlet is connected with storage tank liquid outlet, the pump Pond gas returning port is connected with storage tank gas returning port, the pump pond liquid outlet and liquid phase charging line, natural gas scavenging pipeline, circulation line Connected with the import of pressure piping.
Further, the number of the LNG immersed pumps is at least one that match the LNG pump pond used with LNG immersed pumps Number to be at least one.
Further, the monitoring control system includes temperature sensor, pressure gauge and flammable detector, and the temperature passes Sensor is connected with pressure gauge with LNG pump pond.
The LNG bank bases formula loading system peculiar to vessel can be by the storage tank liquid outlet of LNG low-temperature storage tanks, with pump sledge system Pump pond inlet be connected, LNG by LNG immersed pumps be pressurized after, liquid is gone out by LNG pump pond liquid outlet, through pump sledge system on After metering device metering, the liquid pipe of loading system is conveyed to, is finally filled to by note ship.Meanwhile by the upper BOG of note ship After the metering device metering in pump sledge system is connected to by the gas phase pipeline of loading system, LNG low-temperature storage tanks are conveyed to.
The LNG bank bases formula loading system peculiar to vessel according to pipeline can be divided into charging line, return line, circulation line, Precooling pipeline, pressure piping, scavenging pipeline;
The charging line is used to carry out filling LNG fuel to passing ship;
When the return line is used for by note ship filling LNG, by the BOG return-airs of storage tank above note ship, avoid Because by note ship when filling LNG, pressure of storage tank it is excessive and caused by contingency.
The circulation line ensure that the precooling effect of whole LNG bank bases formula loading system peculiar to vessel, avoid the occurrence of excessive BOG gases, meanwhile, also can to flowmeter precooling, ensure metering accuracy.
The pressure piping is used for for a long time to by note ship filling LNG liquid, the pressure of storage tank in LNG storage systems It is too low, cause LNG immersed pumps to evacuate, the pipeline to the supercharging of LNG low-temperature storage tanks.
The scavenging pipeline is to be used for after the completion of by note ship filling LNG, it is ensured that without remaining LNG liquid in pipeline, It ensure that measuring accuracy and also add security.
By adopting the above-described technical solution, compared with prior art, it is an advantage of the invention that:
Mainly solve the problems, such as overlong time during tank car filling, can be to the remnants in pipeline by purge system LNG liquid is purged, and ensure that the security of system.
Solve inconvenience during tank car filling, progress quickly and easily can be connected with by note ship by loading system Filling, it is easy to operate.
Solve the problems, such as security monitoring during operation, avoid the generation of accident, it is ensured that whole system it is safe and reliable.
The invention will be further described with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of LNG bank bases formula loading system peculiar to vessel of the present invention.
Fig. 2 is present system flow diagram.
Fig. 3 is LNG low-temperature storage tanks schematic diagram of the present invention.
Fig. 4 is the schematic diagram that LNG immersed pumps of the present invention are mounted in LNG pump pond.
Wherein, 1-LNG low-temperature storage tanks, 4- blow gasifiers, 5- purging surge tanks, 6- servicing fluids multi-phase flowmeters, 7- filling Gas phase flow rate meter, 8- nitrogen cylinders, 9- Pull breaking ualves, 10- liquid phase charging lines, 11- gas phase charging lines, 12- precooling pipelines, 13- Natural gas scavenging pipeline, 14- nitrogen sparge tubes road, 15- pressure pipings, 16- circulation lines, 17- storage tank liquid outlets, 18- storage tanks Lower inlet, inlet on 19- storage tanks, 20- storage tank gas phase mouths, 21- storage tank gas returning ports, 23- storage tanks BOG outlets, 24- liquid levels Meter, 25- pressure gauges, 26-LNG immersed pumps, 27-LNG pumps pond, 28- pump pond inlets, 29- pump pond liquid outlets, 30- pump pond return-airs Mouthful, 31- storage systems, 32- pump sledge systems, 33- auxiliary systems, 34- loading systems, by ship is noted, Y- is connected 35- with by note ship Liquid phase mouth, Q- are connected gas phase mouth with by note ship.
Embodiment
Embodiment:As shown in Figs 1-4, a kind of LNG bank bases formula loading system peculiar to vessel, including by note ship 35, storage system 31, Loading system 34, purge system, pump sledge system 32 and auxiliary system 33, the auxiliary system 33 are included to the pneumatic of whole system Valve provides the monitoring of the instrument wind system of source of the gas power and pressure, temperature, liquid level, flow and the gas leakage of monitoring system etc. Control system.When having, when being reached berth by note ship 35 and needing filling, loading system 34 in connection, LNG is flowed by storage system 31 After pumping sledge system 32, be filled into through 10 mouthfuls of liquid phase charging line by note ship 35, meanwhile, by note ship 35 BOG gases by adding Injection system 34 is back to pump sledge system 32, finally reaches storage system 31.
The storage system 31 includes being used for the LNG low-temperature storage tanks 1 for storing LNG liquid and BOG gases, the BOG gas Body refers to LNG liquid passively by the gas after thermal evaporation, and the LNG low-temperature storage tanks 1 are equipped with storage tank under inlet 19, storage tank Inlet 18, storage tank liquid outlet 17, storage tank gas returning port 21, storage tank gas phase mouth 20 and storage tank BOG outlets 23, the upper inlet is set There is spray equipment.The LNG low-temperature storage tanks 1 are equipped with the liquid level gauge 24 and pressure gauge 25 of measurement liquid level.The LNG low-temperature storage tanks 1 Number to be at least one.
The loading system 34 includes charging line, and the charging line includes the gentle phase filler pipe of liquid phase charging line 10 Road 11, servicing fluids multi-phase flowmeter 6 is equipped with the liquid phase charging line 10, filling gas phase is equipped with the gas phase charging line 11 Flowmeter 7, is respectively connected with Pull breaking ualve 9, the liquid phase charging line in the gentle phase charging line 11 of liquid phase charging line 10 10th, gas phase charging line 11 is connected with by note ship 35.
The purge system, which includes nitrogen cylinder 8, blow gasifier 4 and purging surge tank 5, the purge system, includes purging Pipeline, the scavenging pipeline include natural gas scavenging pipeline 13 and nitrogen sparge tube road 14, the nitrogen sparge tube road 14 into Mouth is connected with nitrogen cylinder 8, and the outlet on the nitrogen sparge tube road 14 is connected with liquid phase charging line 10, gas phase charging line 11, The outlet of the natural gas scavenging pipeline 13 is all connected with the gentle phase charging line 11 of liquid phase charging line 10.
A kind of LNG bank bases formula loading system peculiar to vessel of the present invention includes pipe-line system, and the pipe-line system includes precooling pipeline 12, inlet 18 connects under inlet 19, storage tank in the outlet of the precooling pipeline 12 and storage tank, the import of precooling pipeline 12 with The shunting of servicing fluids multi-phase flowmeter 6 on liquid phase charging line 10 is connected, and the pipe-line system includes circulation line 16, the circulation Inlet 18 connects under inlet 19, storage tank in the outlet of pipeline 16 and storage tank, and the pipe-line system includes pressure piping 15, institute Pressure piping 15 is stated to be connected with storage tank gas phase mouth 20.
The pump sledge system 32 includes LNG pump pond 27, LNG immersed pumps 26, the LNG pump being housed in the LNG pump pond 27 Pond 27 is equipped with pump pond inlet 28, pump pond liquid outlet 29 and pump pond gas returning port 30, the pump pond inlet 28 and storage tank liquid outlet 17 connections, the pump pond gas returning port 30 are connected with storage tank gas returning port 21, the pump pond liquid outlet 29 and liquid phase charging line 10, The import of natural gas scavenging pipeline 13, circulation line 16 and pressure piping 15 connects.The number of the LNG immersed pumps 26 is extremely One few, the number in the LNG pump pond 27 used that matches with LNG immersed pumps 26 is at least one.
The liquid phase charging line 10 is equipped with servicing fluids multi-phase flowmeter 6, control valve, check-valves, pressure gauge 25, Pull breaking ualve 9th, liquid feeding hose etc., the gas phase charging line 11 are equipped with filling gas phase flow rate meter 7, control valve, check-valves, pressure gauge 25, Pull breaking ualve 9, liquid feeding hose etc., the natural gas scavenging pipeline 13 are equipped with blow gasifier 4, control valve, purging surge tank 5 Control valve etc. is equipped with Deng, the circulation line 16, the precooling pipeline 12 is equipped with control valve etc., the pressure piping 15 It is equipped with control valve, booster etc..
During this example is new, before just filling is started, due to there is substantial amounts of air in pipeline, for safety, it is necessary to pipe Road carries out inerting, opens nitrogen cylinder 8, by scavenging pipeline, to the sky of the inside of the gentle phase charging line of liquid phase charging line 10 11 Gas is into line replacement, and when being less than 5% in the concentration that oxygen is detected by note 35 side of ship, inerting terminates.
After inerting, by the natural gas in 13 surge tank of natural gas scavenging pipeline to 10 He of liquid phase charging line The nitrogen of gas phase charging line 11 into line replacement, after the completion of, carry out the precooling to pipeline.
When LNG is flowed through to the pump pond inlet 28 in LNG pump pond 27 through storage tank liquid outlet 17, LNG liquid is through LNG immersed pumps 26 After supercharging, flowed out from the pump pond liquid outlet 29 in LNG pump pond 27, then after the flowmeter in liquid phase charging line 10, by pre- Cold pipeline 12 flow back on storage tank inlet 18 under inlet 19, storage tank, after the condition of setting is reached, completes to charging line Precooling.
In this example is new, after the precooling to charging line is completed, storage tanks of the LNG through LNG low-temperature storage tanks 1 goes out liquid Mouth 17 is flowed through to the pump pond inlet 28 in LNG pump pond 27, and LNG liquid flows after the supercharging of LNG immersed pumps 26 from pump pond liquid outlet 29 Go out, then after the flowmeter in liquid phase charging line 10, liquid phase mouth Y be connected to being noted by Pull breaking ualve 9 and with by note ship Ship 35 is filled;Meanwhile gas phase mouth Q, aerating phase filler pipe are connected with by note ship by the BOG gases of note ship 35 through filling After Pull breaking ualve 9 and filling gas phase flow rate meter 7 in road 11, inlet 18 under inlet 19, storage tank is back on storage tank, by right The difference of two flowmeters, accurately calculates liquid volume added, ensure that the precision of metering.
After the completion of filling, liquid phase charging line 10 also has remaining LNG liquid, in order to ensure security, draws after pump Going out scavenging pipeline, LNG purges the pipeline in liquid phase charging line 10 after blow gasifier 4 and purging surge tank 5, A LNG liquid part for the inside has been blown to has been blown back LNG low-temperature storage tanks by note ship 35, another part by precooling pipeline 12 1。
After the completion of purging, substantial amounts of natural gas is also contained in the gentle the inside of phase charging line 11 of liquid phase charging line 10, is Ensure safety, open nitrogen cylinder 8, by scavenging pipeline, to the day of the inside of liquid phase charging line 10 gentle phase charging line 11 Right gas is into line replacement, when being less than the 2% of explosion limit in the concentration that natural gas is detected by note ship 35, replacement completion.
Thermometer, pressure are additionally provided with according to national standard on the LNG bank bases formula loading system 34 peculiar to vessel of the present invention, pipeline Monitoring device, the LNG pump ponds 27 such as table 25, liquid level gauge 24, combustion gas probe are equipped with temperature sensor, pressure gauge 25 etc., whole system System is equipped with flammable detector.
Present invention mainly solves the technical problem to ship filling LNG on the bank, it ensure that the security of filling process, solve Determine the security monitoring problem of filling process.
The foregoing is merely the preferred embodiments of the present invention, it is not intended to limit the invention, all spirit in the present invention All any modification, equivalent and improvement with being done within principle, should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of LNG bank bases formula loading system peculiar to vessel, including by note ship, it is characterised in that:Including storage system, loading system, Purge system, pump sledge system and auxiliary system, the auxiliary system include providing source of the gas power to the operated pneumatic valve of whole system Instrument wind system and monitoring system pressure, temperature, liquid level, flow and gas leakage etc. monitoring control system.
A kind of 2. LNG bank bases formula loading system peculiar to vessel according to claim 1, it is characterised in that:The storage system bag The LNG low-temperature storage tanks for storing LNG liquid and BOG gases are included, the BOG gases refer to LNG liquid passively by thermal evaporation Gas afterwards, the LNG low-temperature storage tanks be equipped with storage tank inlet under inlet, storage tank, storage tank liquid outlet, storage tank gas returning port, Storage tank gas phase mouth and storage tank BOG outlets, the upper inlet are equipped with spray equipment.
A kind of 3. LNG bank bases formula loading system peculiar to vessel according to claim 2, it is characterised in that:The LNG low-temperature storage tanks Liquid level gauge and pressure gauge equipped with measurement liquid level.
A kind of 4. LNG bank bases formula loading system peculiar to vessel according to claim 2, it is characterised in that:The LNG low-temperature storage tanks Number to be at least one.
A kind of 5. LNG bank bases formula loading system peculiar to vessel according to claim 2, it is characterised in that:The loading system bag Charging line is included, the charging line includes the gentle phase charging line of liquid phase charging line, is equipped with the liquid phase charging line Servicing fluids multi-phase flowmeter, filling gas phase flow rate meter, the gentle addition of liquid phase charging line are equipped with the gas phase charging line Pull breaking ualve is respectively connected with note pipeline, the liquid phase charging line, gas phase charging line are connected with by note ship.
A kind of 6. LNG bank bases formula loading system peculiar to vessel according to claim 5, it is characterised in that:The purge system bag Nitrogen cylinder, blow gasifier and purging surge tank are included, the purge system includes scavenging pipeline, and the scavenging pipeline includes natural Gas scavenging pipeline and nitrogen sparge tube road, the import on the nitrogen sparge tube road are connected with nitrogen cylinder, the nitrogen sparge tube road Outlet be connected with liquid phase charging line, gas phase charging line, the outlet of the natural gas scavenging pipeline and liquid phase charging line Gentle phase charging line is all connected with.
A kind of 7. LNG bank bases formula loading system peculiar to vessel according to claim 6, it is characterised in that:Including pipe-line system, institute Stating pipe-line system includes precooling pipeline, and inlet connects under inlet, storage tank in the outlet of the precooling pipeline and storage tank, described The import of precooling pipeline is connected with liquid phase charging line, and the pipe-line system includes circulation line, the outlet of the circulation line It is connected with inlet under inlet, storage tank on storage tank, the pipe-line system includes pressure piping, the pressure piping and storage tank gas Phase mouth connects.
A kind of 8. LNG bank bases formula loading system peculiar to vessel according to claim 7, it is characterised in that:The pump sledge system bag LNG pump pond is included, LNG immersed pumps are housed in the LNG pump pond, the LNG pump pond is equipped with pump pond inlet, pump pond liquid outlet and pump Pond gas returning port, the pump pond inlet are connected with storage tank liquid outlet, and the pump pond gas returning port is connected with storage tank gas returning port, the pump Pond liquid outlet is connected with the import of liquid phase charging line, natural gas scavenging pipeline, circulation line and pressure piping.
A kind of 9. LNG bank bases formula loading system peculiar to vessel according to claim 8, it is characterised in that:The LNG immersed pumps Number is at least one, and the number in the LNG pump pond used that matches with LNG immersed pumps is at least one.
A kind of 10. LNG bank bases formula loading system peculiar to vessel according to claim 8 or claim 9, it is characterised in that:The monitoring control System processed includes temperature sensor, pressure gauge and flammable detector, and the temperature sensor is connected with pressure gauge with LNG pump pond.
CN201711344837.8A 2017-12-15 2017-12-15 A kind of LNG bank bases formula loading system peculiar to vessel Pending CN108006432A (en)

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