CN203731088U - LNG receiving station process system for recovering BOG based on normal temperature compressor - Google Patents
LNG receiving station process system for recovering BOG based on normal temperature compressor Download PDFInfo
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- CN203731088U CN203731088U CN201320869669.5U CN201320869669U CN203731088U CN 203731088 U CN203731088 U CN 203731088U CN 201320869669 U CN201320869669 U CN 201320869669U CN 203731088 U CN203731088 U CN 203731088U
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 122
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000003345 natural gas Substances 0.000 claims abstract description 57
- 238000003860 storage Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 96
- 238000001816 cooling Methods 0.000 claims description 43
- 239000011435 rock Substances 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 5
- 230000005501 phase interface Effects 0.000 claims description 4
- 239000007792 gaseous phase Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000005380 natural gas recovery Methods 0.000 abstract 1
- 239000003949 liquefied natural gas Substances 0.000 description 141
- 238000010438 heat treatment Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000006200 vaporizer Substances 0.000 description 5
- RSIWALKZYXPAGW-NSHDSACASA-N 6-(3-fluorophenyl)-3-methyl-7-[(1s)-1-(7h-purin-6-ylamino)ethyl]-[1,3]thiazolo[3,2-a]pyrimidin-5-one Chemical compound C=1([C@@H](NC=2C=3N=CNC=3N=CN=2)C)N=C2SC=C(C)N2C(=O)C=1C1=CC=CC(F)=C1 RSIWALKZYXPAGW-NSHDSACASA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
An LNG receiving station process system for recovering BOG based on a normal temperature compressor is characterized by comprising an LNG ship unloading arm, an LNG storage tank, an LNG immersed pump, an LNG loading arm, a heater and the normal temperature compressor, wherein an LNG inlet end of the LNG ship unloading arm is used for being connected with an LNG transport ship, and an LNG outlet end of the LNG ship unloading arm is connected with an LNG inlet end of the LNG storage tank through an LNG low temperature pipeline. The LNG receiving station process system is suitable for a small LNG receiving station; a low temperature natural gas recovery processing device of the process system is highly adaptive to gas composition, flow and pressure change; operation is simple, and maintenance is convenient; the domestic normal temperature compressor can be adopted to replace an expensive imported low temperature natural gas compressor, and therefore investment cost of a project is reduced.
Description
Technical field
Reclaim the LNG receiving station process system of BOG gas (natural gas vaporization gas) based on normal temperature compressed machine, for LNG Liquefied natural gas (LNG) receiving station.
Background technique
Along with the development of China's economic, the demand of the energy is day by day increased, domestic LNG Liquefied natural gas is applied in flourish.Domestic built coastal LNG receiving station, major function is, after LNG receives, stores, pressurizes, gasifies, externally to export high-pressure natural gas, simultaneously can be outer defeated by LNG tank car; For the recovery of low temperature BOG gas, mainly adopt direct weighting output technique and recondensation process.Direct weighting output technique is to adopt cryogenic natural gas compressor, and low-temp low-pressure rock gas is pressurized to normal temperature high voltage state, is delivered directly to the outer gas ductwork in station.Recondensation process is by the rock gas pressurization of low temperature, extracts LNG from LNG storage tank again, and both are direct heat transfer in condensation more by a certain percentage, and cryogenic natural gas is liquefied again, is transported to high-pressure service pump pressurized gasification.In these two kinds of techniques, cryogenic natural gas compressor is the key equipment that cryogenic natural gas is recycled, and is related to main equipment---the normal safe operation of LNG storage tank.At present general low temperature oilless reciprocating or the labyrinth compressor of adopting, domestic Compressor Manufacturing factory there is no design, manufactures the mature experience of such BOG compressor, mainly dependence on import, the device fabrication cycle is long, and manufacture cost is high.
Chinese patent CN202371968U discloses a kind of vaporizer recovery device of liquefied for LNG Liquefied natural gas receiving station, comprise boil-off gas compressor, coolant compressor, decompressor, liquefaction ice chest and nitrogen buffer tank, the side of ice chest of it is characterized in that liquefying is connected with boil-off gas compressor by pipeline, and connect successively nitrogen buffer tank, coolant compressor and decompressor of the opposite side of liquefaction ice chest forms loop.
Chinese patent CN202868303U discloses the gentle chemical industry journey of the storage output system of a kind of LNG receiving station, it comprises: several LNG storage tanks, in described LNG storage tank, be provided with several high pressure pump sumps, high pressure pump sump extends to outside LNG storage tank, on LNG storage tank tank body, is provided with BOG interface tube; Be mounted on the high-pressure service pump in high pressure pump sump, LNG high-voltage tube connects high-pressure service pump and exports and extend to outside high pressure pump sump, and is collected to LNG high-pressure main; Vaporizer; BOG compressor; Rock gas mesolow delivery pipe, is connected in BOG compressor outlet and leads to low pipe network in rock gas.
Chinese patent CN103225740A discloses a kind of LNG receiving station and has utilized the BOG processing system of pressure energy, on the high pressure LNG transfer line of its communication system outside the existing rock gas of LNG receiving station, separate high pressure LNG transmission branch, the output terminal of described high pressure LNG transmission branch is connected with the input end of one liquid-gas injection mixer, the output terminal of described liquid-gas injection mixer is connected with the input end of a mesohigh vaporizer, the output terminal of described mesohigh vaporizer connects the input end of natural gas user short distance direct sending pipeline, described liquid-gas injection mixer also has low pressure suction port, described low pressure suction port is connected with the output terminal of the boil-off gas discharge header of LNG storage tank, on described vaporizer discharge header, be provided with the evaporative air control valve regulating according to LNG pressure of storage tank situation.
Chinese patent CN202252833U discloses a kind of LNG Liquefied natural gas receiving station, it comprises LNG ship-unloading system, LNG stocking system, LNG pressurization and the outer communication system of gasification, BOG condenser system, the outer communication system of BOG and LNG loading system, also comprise LNG ship-loading system, wherein LNG ship-loading system comprises: LNG loads pump onto ship, be arranged in the pump sump of LNG tank inside of LNG stocking system, the LNG in storage tank is pressurizeed; LNG loads pipeline onto ship, is connected between LNG shipment pump and shipment arm, and the LNG of pressurization is delivered to LNG shipment arm; Control valve and control instrument, be arranged on LNG shipment pipeline; LNG loads arm onto ship, is connected with LNG ship, and LNG is delivered to LNG ship; Return-air arm, is connected to LNG ship and vapor return line, and BOG is back to vapor return line by LNG ship; Vapor return line, is connected with LNG storage tank, and BOG is returned and is delivered to LNG storage tank.
Coastal LNG receiving station is except the main source of the gas as big coastal city, also bearing supplementing and the LNG of samll cities and towns vaporizing station of land-based area pipe natural gas, the defeated market of non-pipe is (as LNG gas station, remote districts large scale industry user) supply, by the rational deployment in coastal LNG receiving station downstream, build a collection of small-sized LNG receiving station of transporting by water route in good time, as coastal, terminal between riverine LNG receiving station and LNG vaporizing station (LNG gas station), to shorten physical transportation cost, increase domestic LNG gross reserves, and as the part of domestic LNG strategic reserves, the relation between controlled atmosphere peak demand in order to the supply of balance upstream inlet LNG source of the gas and Downstream Market, to improve Economy and the Security of China LNG SUPPLY CHAIN.
Therefore, for the small-sized LNG receiving station of transporting by water route, in function, be different from coastal LNG receiving station, be necessary in fact a kind of new process system of optimal design, to meet small-sized LNG receiving station function needs, also to reduce cost of investment and the construction period of whole engineering simultaneously, and production run cost.
Model utility content
Reclaim the LNG receiving station process system of BOG gas based on normal temperature compressed machine, by the optimal design to the technological process of LNG receiving station, cryogenic gas heater is set, cryogenic natural gas is heated to normal temperature, adopt again domestic normal temperature compressed machine to substitute the import BOG compressor that the manufacture cycle is long, manufacture cost is high normal-temperature natural-gas is compressed, thereby reach the object that reduces construction investment, shortens construction period.
To achieve these goals, the LNG receiving station process system based on normal temperature compressed machine recovery BOG gas adopts following technological scheme:
Reclaim the LNG(LNG Liquefied natural gas of BOG gas (natural gas vaporization gas) based on normal temperature compressed machine) receiving station's process system, this process system comprises: LNG unload a ship arm, LNG storage tank (preferably atmospheric storage tank), LNG immersed pump, LNG entrucking arm, heater and normal temperature compressed machine, wherein, LNG unloads a ship the LNG entrance point of arm for being connected with LNG cargo ship, and the unload a ship LNG outlet end of arm of LNG is connected with the LNG entrance point of LNG storage tank by LNG cryogenic piping;
LNG immersed pump is immersed in LNG storage tank, and its outlet end is connected with the entrance point of LNG entrucking arm by LNG cryogenic piping, and the outlet end of LNG entrucking arm is for being connected with LNG tank car;
The BOG outlet end of LNG storage tank is connected with the Imported gas end of heater by BOG cryogenic piping;
The gas outlet end of heater is connected with the Imported gas end of normal temperature compressed machine by normal-temperature natural-gas pipeline;
The gas outlet end of normal temperature compressed machine is by user outside normal temperature high voltage natural gas line dispatch station, and/or the gas outlet end of normal temperature compressed machine is connected with the Imported gas end of CNG compressor by normal-temperature natural-gas pipeline, the outlet end of CNG compressor is transported to CNG filling machine by CNG pipeline, outer defeated for filling after gas to CNG tank car.
In a preferred implementation, described heater is air temperature type heater (wherein heat medium is air), is preferably the air temperature type heater of fin structure.
In this embodiment, the rock gas of low-temp low-pressure (temperature between-50 DEG C～-160 DEG C, pressure 1KPaG～30KPaG) to air temperature type heater, heats cryogenic natural gas by absorbing airborne heat by BOG cryogenic piping.Low-temp low-pressure rock gas is gas temperature >=-15 DEG C after the heating of air temperature type heater, and for example-15～20 DEG C, preferably-10～15 DEG C.Gas after heating is transported to normal temperature compressed machine by pipeline (normal temperature low pressure natural gas pipes) again and pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user or next treatment process device outside normal-temperature natural-gas pipeline dispatch station.
In another preferred embodiment, described heater is water-bath type heater, and water-bath type heater can be shell of pipe type or around tubular structure.
In this embodiment, (temperature is between-50 DEG C～-160 DEG C for the rock gas of low-temp low-pressure, pressure 1KPaG～30KPaG) heat in water-bath type heater by BOG cryogenic piping, gas temperature >=5 DEG C after heating, for example 0～15 DEG C, preferably 5～10 DEG C, being transported to normal temperature compressed machine by pipeline (normal temperature low pressure natural gas pipes) again pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user or next treatment process device outside normal-temperature natural-gas pipeline dispatch station.
In another preferred implementation, described heater comprises one or more air temperature type heaters and/or one or more water-bath type heater in parallel, wherein BOG cryogenic piping is divided into multiple arms, be connected with the Imported gas end of described one or more air temperature type heaters and/or one or more water-bath type heaters respectively, these rock gas outlet end of described one or more air temperature type heaters and/or one or more water-bath type heaters are connected with the Imported gas end of normal temperature compressed machine behind interflow.
In this embodiment, (temperature is between-50 DEG C～-160 DEG C for the rock gas of low-temp low-pressure, pressure 1KPaG～30KPaG) be divided into multiple branches by BOG cryogenic piping, enter respectively in one or more air temperature type heaters and/or one or more water-bath type heater and heat, gas temperature >=-15 DEG C after heating in described air temperature type heater, for example-15～20 DEG C, preferably-10～15 DEG C, gas temperature >=5 DEG C after heating in described water-bath type heater, for example 0～15 DEG C, preferably 5～10 DEG C, the gas outlet end of described one or more air temperature type heater and/or one or more water-bath type heaters is collaborated, being transported to normal temperature compressed machine by pipeline (normal temperature low pressure natural gas pipes) pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user or next treatment process device outside normal-temperature natural-gas pipeline dispatch station.
Comprising in the mode of execution of water-bath type heater, preferably, normal temperature compressed facility are useful on the water-cooled chiller (for example heat exchange pipeline, heater) (wherein water circulates therein) of the heat of cooling normal temperature compressed machine generation, the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater by pipeline, and the circulating water outlet of water-bath type heater is connected with the circulating water entry end of the cooling unit of normal temperature compressed machine via circulating water pump by pipeline.By such design, the heat that normal temperature compressed machine produces is along with circulating water is transported to water-bath type heater by pipeline, and carrying out heat exchange with cryogenic natural gas, circulating water returns to circulating water pump pressurization again continues the circulating water entry end of the cooling unit that is recycled to normal temperature compressed machine.
Comprising in the mode of execution of water-bath type heater, preferably, CNG compressor also has the cooling unit (for example heat exchange pipeline, heater) (wherein water circulates at this cooling unit) of the heat producing for cooling CNG compressor, the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater by circulating line, and the circulating water outlet of water-bath type heater is connected with circulating water intake (or entrance) end of the cooling unit of CNG compressor via circulating water pump by circulating line.By such design, the heat that CNG compressor produces is along with water is transported to water-bath type heater by pipeline, and carrying out heat exchange with cryogenic natural gas, circulating water returns to circulating water pump pressurization again continues circulating water intake (or entrance) end of the cooling unit that is recycled to CNG compressor.
In this application, " entrance " has same meaning with " import ".
Preferably, between the circulating water outlet of water-bath type heater and circulating water pump, cooling tower is set, it is for further cooling circulating water in the time detecting by the water temperature after water-bath type heater higher than permitted value (for example, for the water temperature permitted value of cooling normal temperature compressed machine, 32 DEG C).
Preferably, between the circulating water outlet end of cooling unit of normal temperature compressed machine and the circulating water intake of water-bath type heater, water heater is set, for at circulating water temperature lower than permitted value (for heat the water temperature permitted value of rock gas at water-bath type heater, for example 5 DEG C) time the circulating water (for example, while in the winter time moving) too low to temperature heat, before ensureing to enter in water-bath type heater, water temperature reaches requirement.
Preferably, the LNG arm of unloading a ship comprises BOG entrance point and BOG outlet end in addition, the arm that the BOG cryogenic piping being connected between this BOG entrance point and BOG outlet end at LNG storage tank and the Imported gas end of heater separates connects, BOG outlet end is connected with the gas phase interface of LNG cargo ship, for the cryogenic gas in LNG storage tank being returned defeated time to LNG cargo ship.
Preferably, LNG entrucking arm comprises BOG entrance point and BOG outlet end in addition, this BOG entrance point is connected with the gaseous phase outlet end of LNG tank car, this BOG outlet end is connected in the BOG cryogenic piping between the BOG outlet end of LNG storage tank and the Imported gas end of heater by pipeline, for BOG gas is transported to heater.
KPaG and MPaG refer to gauge pressure in this application.
The temperature, flow that circulating water entered, flowed out water-bath type heater be according to operating mode, the size of heater, the structure of rock gas that enters heater, and the factor such as the operating mode of normal temperature compressed machine calculates, and therefore, is not particularly limited.
The LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine that process system provides is applicable to LNG receiving station.
According to device of the present utility model, by pipe-line system, the LNG liquid in LNG cargo ship is unloaded to LNG storage tank and stored, utilize LNG immersed pump from the output of LNG storage tank, be that LNG tank car fills the outer LNG user that is passed to by LNG entrucking arm; BOG gas is heated to normal temperature by BOG water-bath type heater (BOG air temperature type heater), utilize the gas after normal temperature compressed machine compresses, compresses can be according to downstream user condition, can directly pass through the outer gas pipeline in station to user, or after CNG compressor compresses again, be filled with CNG tank car by CNG filling machine again, be distributed to CNG gas station or the gas user in downstream.Circulating water is taken away the heat of normal temperature compressed machine and CNG compressor, by BOG water-bath type heater by BOG gas-heated to normal temperature, be finally cooled to design temperature by cooling tower.
Reclaim the advantage of the LNG receiving station process system of BOG gas based on normal temperature compressed machine:
1, cryogenic natural gas recycling has stronger adaptability to gas composition, flow, pressure variation.
2, make full use of the heat energy of air or compressor, normal production does not need additionally to provide heat.
3, adopt the cryogenic natural gas compressor of domestic normal temperature compressed machine replace imported costliness, save an investment cost of engineering, also shorten the manufacture cycle of compressor simultaneously.
4, do not need additionally to newly increase equipment, can avoid unnecessary once investment and operation energy consumption.
Brief description of the drawings
Fig. 1 is the LNG receiving station process system general flow chart that reclaims BOG gas based on normal temperature compressed machine.
Embodiment
Describe LNG of the present utility model receiving station process system in detail referring to accompanying drawing.
Refer to Fig. 1, it shows first mode of execution that reclaims the LNG receiving station process system of BOG gas based on normal temperature compressed machine, comprising:
The LNG arm 20 of unloading a ship, its LNG entrance point is connected with LNG cargo ship 10 liquid phase interfaces, and outlet end is connected with LNG pipeline A, and interior LNG cargo ship 10 liquid is unloaded to LNG storage tank 30; The arm that the BOG cryogenic piping being connected between its BOG entrance point and BOG outlet end at LNG storage tank and the Imported gas end of heater separates, be that cryogenic natural gas pipeline B1 connects, its BOG outlet end is connected with LNG cargo ship 10 gas phase interfaces, interior LNG storage tank 30 cryogenic gas is returned to LNG cargo ship 10 defeated time, for unloading ship time, along with LNG liquid level in cabin declines, to its make-up gas, thereby prevent from occurring in cabin negative pressure.
LNG storage tank 30, its LNG entrance point is connected with LNG pipeline A, receives from the LNG arm 20 of unloading a ship and carries the liquid of coming; By being immersed in the LNG immersed pump 40 in LNG storage tank 30, the liquid in LNG storage tank 30 being transported to LNG entrucking arm 50 by LNG pipeline C and filling for LNG tank car (not shown); Its BOG outlet side and BOG cryogenic piping, cryogenic natural gas pipeline B3 is connected, and the BOG gas in LNG storage tank 30 is delivered to heater (being water-bath type heater 60 and air temperature type heater 70 in the present embodiment).
Heater (water-bath type heater 60 and air temperature type heater 70), its Imported gas end is connected with cryogenic natural gas pipeline B3, its gas outlet end is by pipeline D(normal temperature low pressure natural gas pipes) be connected with normal temperature compressed machine 80.
LNG entrucking arm 50 comprises BOG entrance point and BOG outlet end in addition, this BOG entrance point is connected with the gaseous phase outlet end of LNG tank car, this BOG outlet end is connected in the BOG cryogenic piping B3 between the BOG outlet end of LNG storage tank 30 and the Imported gas end of heater (60 and/or 70) by pipeline B2, for BOG gas is transported to heater.
In the present embodiment, described heater comprises an air temperature type heater 70 and a water-bath type heater 60 in parallel, wherein BOG cryogenic piping B3 is divided into two arms, be connected with the Imported gas end of a described air temperature type heater 70 and a water-bath type heater 60 respectively, these rock gas outlet end of a described air temperature type heater 70 and a water-bath type heater 60 are connected with the Imported gas end of normal temperature compressed machine 80 behind interflow.
In this embodiment, (temperature is between-50 DEG C～-160 DEG C for the rock gas of low-temp low-pressure, pressure 1KPaG～30KPaG) by being divided into Liang Ge branch after cryogenic natural gas pipeline, enter respectively in an air temperature type heater and a water-bath type heater and heat, gas temperature >=-15 DEG C after heating in described air temperature type heater 70, for example-15～20 DEG C, preferably-10～15 DEG C, gas temperature >=5 DEG C after heating in described water-bath type heater 60, for example 0～15 DEG C, preferably 5～10 DEG C, the gas outlet end of a described air temperature type heater 70 and a water-bath type heater 60 is collaborated, being transported to normal temperature compressed machine 80 by pipeline (normal temperature low pressure natural gas pipes D) pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user 110 or for example CNG compressor 90 of next treatment process device outside normal temperature high voltage natural gas line dispatch station.
Normal temperature compressed machine and CNG compressor have the water-cooled chiller (for example heat exchange pipeline, heater) (wherein water circulates at this cooling unit) for the heat of cooling normal temperature compressed machine and the generation of CNG compressor, the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater 60 by circulating line G, and the circulating water outlet of water-bath type heater 60 is connected with circulating water intake (or entrance) end of the cooling unit of normal temperature compressed machine 80 and CNG compressor 90 via circulating water pump 120 by circulating line G.By such design, the heat that normal temperature compressed machine 80 and CNG compressor 90 produce is along with water is transported to water-bath type heater 60 by pipeline, and carrying out heat exchange with cryogenic natural gas, circulating water returns to circulating water pump 120 pressurization again continues circulating water intake (or entrance) end of the cooling unit that is recycled to normal temperature compressed machine 80 and CNG compressor 90.
Between the circulating water outlet of water-bath type heater 60 and circulating water pump 120, cooling tower 140 is set, it is for further cooling circulating water in the time detecting by the water temperature after water-bath type heater higher than permitted value (for example, for the water temperature permitted value of cooling normal temperature compressed machine, 32 DEG C).
Between the circulating water outlet end of cooling unit of normal temperature compressed machine 80 and CNG compressor 90 and the circulating water intake of water-bath type heater 60, water heater 130 is set, for at circulating water temperature lower than permitted value (for heat the permitted value of rock gas at water-bath type heater, for example 5 DEG C) time the circulating water (for example, while in the winter time moving) too low to temperature heat, ensure to enter water-bath type heater 60 before water temperature reach requirement.
But, described heater is not limited to comprise an air temperature type heater 70 and a water-bath type heater 60 in parallel, can comprise that described heater comprises multiple (for example, more than 2 or 2) air temperature type heaters 70 and multiple (for example, more than 2 or 2) water-bath type heater 60 in parallel, also multiple (for example, more than 2 or 2) air temperature type heaters 70 and a water-bath type heater 60 in parallel can be comprised, an air temperature type heater 70 and multiple (for example, more than 2 or 2) water-bath type heater 60 in parallel can also be comprised.
Above Fig. 1 shows preferred implementation of the present utility model.
In second mode of execution, cryogenic natural gas recycling and processing device comprises:
Air temperature type heater 70, its Imported gas end is connected with cryogenic natural gas pipeline B3; Normal temperature compressed machine 80, its Imported gas end is by pipeline D(normal temperature low pressure natural gas pipes) be connected with the gas outlet end of described air temperature type heater 70, its gas outlet end is connected with normal-temperature natural-gas pipeline E.Described air temperature type heater 70 is preferably the air temperature type heater of fin structure.
In this embodiment, the rock gas of low-temp low-pressure (temperature between-50 DEG C～-160 DEG C, pressure 1KPaG～30KPaG) enters into air temperature type heater 70 by cryogenic natural gas pipeline B3, heats cryogenic natural gas by absorbing airborne heat.Low-temp low-pressure rock gas is gas temperature >=-15 DEG C after 70 heating of air temperature type heater, and for example-15～20 DEG C, preferably-10～15 DEG C.Gas after heating is transported to normal temperature compressed machine 80 by pipeline (normal temperature low pressure natural gas pipes D) again and pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user or next treatment process device outside normal temperature high voltage natural gas line E dispatch station.
In the 3rd mode of execution, cryogenic natural gas recycling and processing device comprises:
Water-bath type heater 60, its Imported gas end is connected with cryogenic natural gas pipeline B3; Normal temperature compressed machine 80, its Imported gas end is by pipeline D(normal temperature low pressure natural gas pipes) be connected with the gas outlet end of described water-bath type heater 60, its gas outlet end is connected with normal temperature high voltage natural gas line E.Water-bath type heater 60 can be shell of pipe type or around tubular structure.
In this embodiment, (temperature is between-50 DEG C～-160 DEG C for the rock gas of low-temp low-pressure, pressure 1KPaG～30KPaG) heat in water-bath type heater 60 by cryogenic natural gas pipeline B3, gas temperature >=5 DEG C after heating, for example 0～15 DEG C, preferably 5～10 DEG C, being transported to normal temperature compressed machine 80 by pipeline (normal temperature low pressure natural gas pipes D) again pressurizes, outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user or next treatment process device outside normal-temperature natural-gas pipeline E dispatch station.
In above-mentioned the 3rd mode of execution, preferably, normal temperature compressed machine 80 and CNG compressor 90 have cooling unit (for example heat exchange pipeline for the heat of cooling normal temperature compressed machine and the generation of CNG compressor, heater) (wherein water circulates in this cooling unit), the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater 60 by circulating line G, the circulating water outlet of water-bath type heater 60 is connected with circulating water intake (or entrance) end of the cooling unit of normal temperature compressed machine 80 and CNG compressor 90 via circulating water pump 120 by circulating line G.By such design, the heat that normal temperature compressed machine 80 and CNG compressor 90 produce is along with water is transported to water-bath type heater 60 by pipeline, and carrying out heat exchange with cryogenic natural gas, circulating water returns to circulating water pump 120 pressurization again continues circulating water intake (or entrance) end of the cooling unit that is recycled to normal temperature compressed machine 80 and CNG compressor 90.
In addition, preferably, between the circulating water outlet of water-bath type heater 60 and circulating water pump 120, cooling tower 140 is set, it is for further cooling circulating water in the time detecting by the water temperature after water-bath type heater 60 higher than permitted value (for example, for the temperature permitted value of cooling normal temperature compressed machine, 32 DEG C).
In addition, preferably, between the circulating water outlet end of cooling unit of normal temperature compressed machine 80 and the circulating water intake of water-bath type heater 60, water heater 130 is set, for at circulating water temperature lower than permitted value (for heat the permitted value of rock gas at water-bath type heater, for example 5 DEG C) time the circulating water (for example, while in the winter time moving) too low to temperature heat, ensure to enter water-bath type heater 60 before water temperature reach requirement.
Normal temperature compressed machine 80, its Imported gas end is connected with normal temperature low pressure pipeline D, outlet end is connected with natural gas line E, the rock gas of low normal pressure and temperature is pressurized to outlet pressure >=0.4MPaG, for example 0.4～1.6MPaG, preferably 1.0～1.2MPaG, finally by user 110 or next treatment process device outside normal-temperature natural-gas pipeline E dispatch station.
CNG compressor 90, its Imported gas end is connected with normal-temperature natural-gas pipeline E, outlet end is connected with CNG pipeline F, rock gas is pressurized to outlet pressure >=20MPaG, for example 20～25MPaG, preferably 22～25MPaG, is finally transported to CNG filling machine 100 by CNG pipeline F, fill after gas to CNG tank car, outer defeated.
Claims (9)
1. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine, is characterized in that, this process system comprises:
LNG unload a ship arm, LNG storage tank, LNG immersed pump, LNG entrucking arm, heater and normal temperature compressed machine, wherein, LNG unloads a ship the LNG entrance point of arm for being connected with LNG cargo ship, and the unload a ship LNG outlet end of arm of LNG is connected with the LNG entrance point of LNG storage tank by LNG cryogenic piping;
LNG immersed pump is immersed in LNG storage tank, and its outlet end is connected with the entrance point of LNG entrucking arm by LNG cryogenic piping, and the outlet end of LNG entrucking arm is for being connected with LNG tank car;
The BOG outlet end of LNG storage tank is connected with the Imported gas end of heater by BOG cryogenic piping;
The gas outlet end of heater is connected with the Imported gas end of normal temperature compressed machine by normal-temperature natural-gas pipeline;
The gas outlet end of normal temperature compressed machine is by user outside normal temperature high voltage natural gas line dispatch station, and/or the gas outlet end of normal temperature compressed machine is connected with the Imported gas end of CNG compressor by normal-temperature natural-gas pipeline, the outlet end of CNG compressor is transported to CNG filling machine by CNG pipeline, outer defeated for filling after gas to CNG tank car.
2. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 1, is characterized in that, described heater is air temperature type heater.
3. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 1, is characterized in that, described heater is water-bath type heater.
4. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 1, it is characterized in that, described heater comprises one or more air temperature type heaters and/or one or more water-bath type heater in parallel, wherein cryogenic natural gas pipeline is divided into multiple arms, be connected with the Imported gas end of described one or more air temperature type heaters and/or one or more water-bath type heaters respectively, these rock gas outlet end of described one or more air temperature type heater and/or one or more water-bath type heaters are connected with the Imported gas end of normal temperature compressed machine behind interflow.
5. according to the LNG receiving station process system based on normal temperature compressed machine recovery BOG gas described in claim 3 or 4, it is characterized in that, normal temperature compressed facility are useful on the water-cooled chiller of the heat of cooling normal temperature compressed machine generation, the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater by pipeline, and the circulating water outlet of water-bath type heater is connected with the circulating water entry end of the cooling unit of normal temperature compressed machine via circulating water pump by pipeline; And/or CNG compressor has the water-cooled chiller of the heat producing for cooling CNG compressor, the circulating water outlet end of this cooling unit is connected with the circulating water intake of water-bath type heater by circulating line, and the circulating water outlet of water-bath type heater is connected with the circulating water intake end of the cooling unit of CNG compressor via circulating water pump by circulating line.
6. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 5, it is characterized in that, between the circulating water outlet and circulating water pump of water-bath type heater, be provided for the cooling tower of further cooling circulating water in the time detecting by the water temperature after water-bath type heater higher than permitted value.
7. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 6, it is characterized in that, between the circulating water outlet end of cooling unit and the circulating water intake of water-bath type heater of normal temperature compressed machine, be provided for the water heater too low water of temperature being heated during lower than permitted value at circulating water temperature.
8. the LNG receiving station process system that reclaims BOG gas based on normal temperature compressed machine according to claim 1, it is characterized in that, the LNG arm of unloading a ship comprises BOG entrance point and BOG outlet end, the arm that the BOG cryogenic piping being connected between this BOG entrance point and BOG outlet end at LNG storage tank and the Imported gas end of heater separates connects, BOG outlet end is connected with the gas phase interface of LNG cargo ship, for the cryogenic gas in LNG storage tank being returned defeated time to LNG cargo ship.
9. according to the LNG receiving station process system based on normal temperature compressed machine recovery BOG gas described in claim 1 or 8, it is characterized in that, LNG entrucking arm comprises BOG entrance point and BOG outlet end in addition, this BOG entrance point is connected with the gaseous phase outlet end of LNG tank car, this BOG outlet end is connected in the BOG cryogenic piping between the BOG outlet end of LNG storage tank and the Imported gas end of heater by pipeline, for BOG gas is transported to heater.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869669.5U CN203731088U (en) | 2013-12-26 | 2013-12-26 | LNG receiving station process system for recovering BOG based on normal temperature compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869669.5U CN203731088U (en) | 2013-12-26 | 2013-12-26 | LNG receiving station process system for recovering BOG based on normal temperature compressor |
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| CN203731088U true CN203731088U (en) | 2014-07-23 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295889A (en) * | 2014-10-20 | 2015-01-21 | 中国海洋石油总公司 | Vaporized gas recovery system of LNG (Liquid Natural Gas) receiving station terminal |
| CN105605417A (en) * | 2016-01-08 | 2016-05-25 | 东莞新奥燃气有限公司 | Low-temperature natural gas recovery treatment device |
| CN106402644A (en) * | 2016-09-06 | 2017-02-15 | 常州大学 | BOG and oil gas combined recycling system of LNG oil gas cooperative station |
| CN108167205A (en) * | 2017-12-25 | 2018-06-15 | 沈阳透平机械股份有限公司 | LNG compressors are with pressure to start the method for determining |
| CN109737300A (en) * | 2019-01-10 | 2019-05-10 | 舟山市祥睿船舶科技开发有限责任公司 | A kind of energy-saving LNG fuel gas supply equipment |
| CN110529742A (en) * | 2019-09-27 | 2019-12-03 | 昆明理工大学 | A kind of automobile mounted insulated gas cylinder boil-off gas recycling system of LNG |
| CN112648530A (en) * | 2021-01-06 | 2021-04-13 | 青岛科技大学 | BOG processing system of LNG transport ship |
| CN112902554A (en) * | 2021-02-02 | 2021-06-04 | 南通职业大学 | Natural gas evaporation gas recovery reliquefaction device |
| CN114198640A (en) * | 2021-12-20 | 2022-03-18 | 中国市政工程华北设计研究总院有限公司 | LNG receiving station ship unloading pipeline cold insulation system and cold insulation method thereof |
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- 2013-12-26 CN CN201320869669.5U patent/CN203731088U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104295889A (en) * | 2014-10-20 | 2015-01-21 | 中国海洋石油总公司 | Vaporized gas recovery system of LNG (Liquid Natural Gas) receiving station terminal |
| CN105605417A (en) * | 2016-01-08 | 2016-05-25 | 东莞新奥燃气有限公司 | Low-temperature natural gas recovery treatment device |
| CN106402644B (en) * | 2016-09-06 | 2018-10-19 | 常州大学 | A kind of LNG oil gas builds station BOG, oil gas combined recovery system of automobile jointly |
| CN106402644A (en) * | 2016-09-06 | 2017-02-15 | 常州大学 | BOG and oil gas combined recycling system of LNG oil gas cooperative station |
| CN108167205B (en) * | 2017-12-25 | 2019-09-17 | 沈阳透平机械股份有限公司 | The starting with pressure of LNG compressor determines method |
| CN108167205A (en) * | 2017-12-25 | 2018-06-15 | 沈阳透平机械股份有限公司 | LNG compressors are with pressure to start the method for determining |
| CN109737300A (en) * | 2019-01-10 | 2019-05-10 | 舟山市祥睿船舶科技开发有限责任公司 | A kind of energy-saving LNG fuel gas supply equipment |
| CN110529742A (en) * | 2019-09-27 | 2019-12-03 | 昆明理工大学 | A kind of automobile mounted insulated gas cylinder boil-off gas recycling system of LNG |
| CN110529742B (en) * | 2019-09-27 | 2020-11-24 | 昆明理工大学 | LNG automobile-mounted heat-insulation gas cylinder evaporation gas recycling system |
| CN112648530A (en) * | 2021-01-06 | 2021-04-13 | 青岛科技大学 | BOG processing system of LNG transport ship |
| CN112648530B (en) * | 2021-01-06 | 2022-04-26 | 青岛科技大学 | BOG processing system of LNG transport ship |
| CN112902554A (en) * | 2021-02-02 | 2021-06-04 | 南通职业大学 | Natural gas evaporation gas recovery reliquefaction device |
| CN114198640A (en) * | 2021-12-20 | 2022-03-18 | 中国市政工程华北设计研究总院有限公司 | LNG receiving station ship unloading pipeline cold insulation system and cold insulation method thereof |
| CN114198640B (en) * | 2021-12-20 | 2023-11-03 | 中国市政工程华北设计研究总院有限公司 | LNG receiving station ship unloading pipeline cold insulation system and cold insulation method thereof |
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