CN106402650A - Air-temperature type combined LNG gasification system and gasification method - Google Patents
Air-temperature type combined LNG gasification system and gasification method Download PDFInfo
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- CN106402650A CN106402650A CN201611000687.4A CN201611000687A CN106402650A CN 106402650 A CN106402650 A CN 106402650A CN 201611000687 A CN201611000687 A CN 201611000687A CN 106402650 A CN106402650 A CN 106402650A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
- 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
- F17C13/10—Arrangements for preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
- F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
- F17C2227/0397—Localisation of heat exchange characterised by fins
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
- F17C2260/032—Avoiding freezing or defrosting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to an air-temperature type combined LNG gasification system as well as a corresponding gasification method, and belongs to the technical field of natural gas application. The system comprises a first heat exchanger, a second heat exchanger and a third heat exchanger with tube passes and shell passes. A first pump controlled by liquefied natural gas temperature at a tube pass inlet of the third heat exchanger is mounted in a tube pass inlet pipeline of the third heat exchanger, and a tube pass outlet pipeline of the third heat exchanger is connected to a liquefied natural gas gasification output pipeline through the tube pass of the first heat exchanger; a shell pass outlet pipeline of the third heat exchanger is connected to a tube pass inlet of the second heat exchanger through a second pump controlled by liquefied propane temperature at a tube pass inlet of the second heat exchanger, and a gaseous propane pipeline at a tube pass outlet of the second heat exchanger is connected to a shell pass inlet of the third heat exchanger to form a loop-back heat exchange pipeline. By fully using air as a heat source without auxiliary heating equipment, the system can be used either at the seaside or in inland. The outer wall of the pipeline is prevented from icing, and the system is convenient to transport and maintain.
Description
Technical field
The present invention relates to a kind of LNG gasification device, the combined LNG gasification system of especially a kind of air temperature type, be given simultaneously
Corresponding gasification process, belongs to natural gas application technology field.
Background technology
Liquefied natural gas（Abbreviation LNG）Main component is methane, is that a kind of high-quality, the efficient, energy of cleaning and chemical industry are former
Material.Traditional air-heating type gasifier is all by air and low temperature LNG direct heat transfer, and result easily causes heat exchange pipe outer wall frosting.
Intermediate medium gasification is the gasification mode that current LNG receiving station commonly uses.Retrieval understands, patent of invention CN201110333054.6 is public
A kind of system and method making liquefied natural gas vaporization using intermediate medium are opened, this gasification system comprises the top being mutually communicated
Cavity and lower cavity, the latent heat of vaporization using intermediate medium heats to liquefied natural gas, and intermediate medium condensation enters lower chamber
Body, is heated again, forms circulation.Fluid for heating intermediate medium is usually sea water or normal-temperature water, such as using sea water then
The use region limits of equipment are by the sea；As heated using normal-temperature water, the water after being cooled needs using large-scale firing equipment
Heated again, otherwise can the wasting of resources；And water temperature is affected larger by weather, winter easily freezes；Furthermore, no matter using sea water
Or normal-temperature water is both needed to substantial amounts of kinetic energy, above-mentioned reason all can lead to apparatus structure complexity, cost of investment to increase.
In addition Chinese utility model patent CN202770260U discloses a kind of open-shelf natural gas vaporization device, by distributing
Device and heat-exchanging tube bundle composition, heat exchanger tube is star-like sleeve pipe, has the function of preventing freezing, but this structure causes heat-exchanging tube bundle
Length increases, and because thermal source only has sea water, the therefore gasifier field of employment of this pattern limits by the sea.Another China is practical
New patent CN202834735U discloses a kind of intermediate medium gasifier, is integrated in one by three different heat exchangers of function
In big equipment, its compact conformation, amount of vaporization is big.But this gasifier complex structure, technological requirement is high, manufactures, safeguards and transports
Difficulty is larger.Chinese invention patent CN1793715A discloses a kind of air-heating type gasifier, by upstream NG（Gaseous natural gas）With
Enter back into gasifier and rise to room temperature after low temperature LNG mixing, it is to avoid low temperature LNG directly and air contact, but this gasifier is only
It is that NG is heated up, do not play the effect of gasification LNG.
Content of the invention
It is an object of the invention to：The shortcoming existing for above-mentioned prior art, proposition one kind not only manufactures, the side of maintenance
Just, the air temperature type combined LNG gasification system and without heat resource equipment, provides corresponding gasification process simultaneously, such that it is able to
While ensureing LNG gasification efficiency, because energy-conserving and environment-protective, application scenario are unrestricted, and it is able to practical popularization and application.
In order to reach object above, the air temperature type combined LNG gasification system of the present invention includes being respectively provided with tube side and shell
First, second, third heat exchanger of journey, the tube side inlet ductwork of described 3rd heat exchanger is equipped with being controlled by the 3rd heat exchanger tube pass
First pump of entrance liquified natural gas temperature, the tube side export pipeline of described 3rd heat exchanger is entered by the tube side of First Heat Exchanger
After mouthful, liquified natural gas gasification output pipe is connect by the tube side outlet of First Heat Exchanger；The shell-side outlet of described 3rd heat exchanger draws
Go out the tube-side inlet that the second pump that pipeline stands to control in the second heat exchanger tube pass entrance liquid petroleum gas (liquid propane gas) temperature connects the second heat exchanger, institute
The shell side inlet that gaseous propane pipeline connects the 3rd heat exchanger is drawn in the tube side outlet stating the second heat exchanger, forms winding heat-exchange tube
Road；The shell side inlet of the shell side inlet of described First Heat Exchanger and the second heat exchanger meets going out of the first blower fan and the second blower fan respectively
Air port, the shell-side outlet of the shell-side outlet of described First Heat Exchanger and the second heat exchanger connects air respectively.
The corresponding gasification process of the present invention includes：
By the first pump, liquified natural gas is inputted the 3rd heat exchanger tube pass, control its input flow rate 150,000 190000 kg/
H, pressure 5.5 6.5 Mpa, fully gasification output after First Heat Exchanger again after preliminary gasification；
By the second pump by liquid petroleum gas (liquid propane gas) input the second heat exchanger tube pass, control its input flow rate 300000 500000kg/h,
Pressure 0.2 0.5Mpa；By second heat exchanger tube pass output gaseous propane input the 3rd heat exchanger shell side, by with liquid
The second pump is returned after natural gas heat exchange liquefaction；
By the first blower fan, air is inputted the shell side of First Heat Exchanger, air velocity controls in 300 500m3/ s, and preliminary
The natural gas heat exchange of gasification makes it fully gasify；
By the second blower fan, air is inputted the shell side of the second heat exchanger, air velocity controls with 2000 2500m3/ s, with
Liquid petroleum gas (liquid propane gas) heat exchange is vaporized.
It can be appreciated that compared with prior art, the method have the advantages that：
1st, use air as thermal source completely, without ancillary heating equipment.
2nd, due to air source extensively, therefore our bright range no matter seashore, inland.
3rd, use pentane as intermediate medium, heat source medium air is not directly contacted with low temperature liquid natural gas, it is to avoid pipe
Road outer wall freezes.
4th, two heat exchangers in series distribution gasification is it is ensured that the sky that fully gasifies as more than -5 DEG C of -35 DEG C of liquified natural gas
So gas output.
5th, it is readily transported and safeguards, flexibly can be installed according to field condition.
Brief description
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is that the system of one embodiment of the invention constitutes sketch.
Fig. 2 is that the equipment of Fig. 1 embodiment arranges sketch.
Wherein：First Heat Exchanger Y, the second heat exchanger E, the 3rd heat exchanger S, the first pump 1, the first frequency conversion motor 2, first are pressed
Power transmitter 3, the 3rd heat exchanger shell pass export the 4, the 3rd heat exchanger tube pass entrance 5, the 3rd heat exchanger tube pass export pipeline 6, the
Three heat exchanger shell pass entrances 7, First Heat Exchanger shell-side outlet 8, First Heat Exchanger tube-side inlet 9, natural gas gasifying output pipe
10th, First Heat Exchanger shell side inlet 11, the first blower fan 12, the second blower fan 13, the second heat exchanger tube pass export the 14, second heat exchanger
Shell side inlet 15, the second heat exchanger shell pass export the 16, second heat exchanger tube pass entrance 17, second pressure transmitter 18, second becomes
Frequency motor 19, the second pump 20.
Specific embodiment
Embodiment one
The air temperature type combined LNG gasification system of the present embodiment as shown in figure 1, include be respectively provided with tube side and shell side first,
Second, third heat exchanger Y, E, S, the tube side inlet ductwork of the wherein the 3rd heat exchanger S enters equipped with being controlled by the 3rd heat exchanger S tube side
First pump 1 of mouth 5 liquified natural gas temperature and the first pressure transmitter 3 of response liquified natural gas temperature, the 3rd heat exchanger S
Tube side export pipeline 6 by liquid sky being connect by the tube side outlet 10 of First Heat Exchanger Y after the tube-side inlet 9 of First Heat Exchanger Y
So gas gasification output pipe.The first frequency conversion motor 2 that the control output end of first pressure transmitter connects driving the first pump 1 is controlled
End, therefore can conveniently realize input flow rate 150,000 190000 kg/h, the pressure 5.5 6.5 controlling liquified natural gas
Mpa, fully gasification output after First Heat Exchanger Y again after being allowed to gasify through the 3rd heat exchanger S is preliminary.
The shell-side outlet 4 of the 3rd heat exchanger S is drawn pipeline and is stood to control in the second heat exchanger E tube-side inlet 17 liquid petroleum gas (liquid propane gas) temperature
Second pump 20 of degree connects the second heat exchanger E tube-side inlet 17, the tube side outlet 14 extraction gaseous propane pipeline 14 of the second heat exchanger E
Connect the shell side inlet 7 of the 3rd heat exchanger S, form winding heat exchange pipe.The shell-side outlet 4 of the 3rd heat exchanger is drawn pipeline and is also filled
There is the second pressure transmitter 18 of response liquid petroleum gas (liquid propane gas) temperature, the control output end of this second pressure transmitter connects driving the second pump
20 the second frequency conversion motor 19 controlled end, therefore can conveniently realize and control liquid petroleum gas (liquid propane gas) to input the second heat exchanger E tube side
Flow 300000 500000kg/h, pressure 0.2 0.5Mpa, are allowed to export gaseous propane through the second heat exchanger E tube side, then enter
Enter the shell side of the 3rd heat exchanger S, after liquefying with liquified natural gas heat exchange, return the second pump 20.
The shell side inlet 11 of First Heat Exchanger Y connects the air outlet of the first blower fan 12, and the shell-side outlet 8 of First Heat Exchanger Y connects
Air.Therefore by the first blower fan 12, air can be inputted the shell side of First Heat Exchanger Y, air velocity is actual to be controlled
300—500m3/ s, the natural gas heat exchange with preliminary gasification makes it fully gasify.
The shell side inlet 15 of the second heat exchanger E connects the air outlet of the second blower fan 13, and the shell-side outlet 16 of the second heat exchanger E connects
Air.Therefore by the second blower fan, air can be inputted the shell side of the second heat exchanger, air velocity is actual control with
2000—2500m3/ s, is vaporized with liquid petroleum gas (liquid propane gas) heat exchange.
Actual motion is as shown in Fig. 2-170-160 DEG C of LNG is entered simultaneously with the flow of 150,000 190000 kg/h
Its tube side is entered by the tube-side inlet of the shell-and-tube exchanger as the 3rd heat exchanger, the manipulation pressure of tube side is
5.5 6.5Mpa, LNG are about-35-30 DEG C of NG by gasifying for temperature, and NG enters from tube side outlet and is substantially air temperature type gas
Change in the pipe of first heat exchanger of device, in pipe, operating pressure is still 5.5 6.5Mpa, and after air heating, the temperature of NG reaches
Arrive more than -5 DEG C, leave from the outlet of this air-heating type gasifier and be transported to appointed place.The shell side carbon of this shell-and-tube exchanger
Steel makes, and heat exchanger tube is austenitic stainless steel finned tube.
The shell side of the 3rd heat exchanger is saturation propane gas, and operating pressure is 0.2 0.5Mpa, the flow of propane vapor
For 300000 500000kg/h, propane gas leave this shell-and-tube exchanger, quilt by the outlet of its shell side after being condensed
Enter in the pipe of second heat exchanger that essence is also air-heating type gasifier after second pump pressure contracting supercharging, operating pressure remains as
0.2 0.5Mpa, after air heating, propane is gasified, and returns to shell-and-tube exchanger from the outlet of this air-heating type gasifier
Shell side inlet, carries out the heat exchange of subsequent cycle.As the air-heating type gasifier of first, second heat exchanger, its heat exchanger tube is
The high fin heat exchange pipe of the outer attached aluminum fin-stock of carbon steel base tube.
With below 10 DEG C of ground temperature, air exit temp be designed more than -4 DEG C, as the sky of second heat exchanger
The size of heating type gasifier is 35000 × 2700 × 100 mm, and the fan total blast volume of outfit is about 2000 2500m3/ s, motor
General power is 8.2 8.8kW；Size as the air-heating type gasifier of first heat exchanger is 20000 × 6000 × 200 mm,
The fan total blast volume being equipped with is about 300 500m3/ s, motor general power is less than 1kW.
In addition to the implementation, the present invention can also have other embodiment.All employing equivalents or equivalent transformation shape
The technical scheme becoming, all falls within the protection domain of application claims.
Claims (6)
1. a kind of combined LNG gasification system of air temperature type it is characterised in that：Including being respectively provided with first, the of tube side and shell side
2nd, the 3rd heat exchanger, described 3rd heat exchanger（S）Tube side inlet ductwork equipped with being controlled by the 3rd heat exchanger tube pass entrance（5）
First pump of liquified natural gas temperature（1）, the tube side export pipeline of described 3rd heat exchanger（6）By First Heat Exchanger（Y）'s
Tube-side inlet（9）Exported by First Heat Exchanger tube side afterwards（10）Connect liquified natural gas gasification output pipe；Described 3rd heat exchanger
Shell-side outlet（4）Draw pipeline to stand to control in the second heat exchanger tube pass entrance（17）Second pump of liquid petroleum gas (liquid propane gas) temperature（20）Connect
Second heat exchanger（E）Tube-side inlet, described second heat exchanger tube side outlet（14）Extraction gaseous propane pipeline connects the 3rd and changes
The shell side inlet of hot device（7）, form winding heat exchange pipe；The shell side inlet of described First Heat Exchanger（11）With the second heat exchanger
Shell side inlet（15）Connect the first blower fan respectively（12）With the second blower fan（13）Air outlet, the shell side of described First Heat Exchanger goes out
Mouthful（8）Shell-side outlet with the second heat exchanger（16）Connect air respectively.
2. the combined LNG gasification system of air temperature type according to claim 1 it is characterised in that：Described 3rd heat exchanger
, equipped with the first pressure transmitter of response liquified natural gas temperature, the control of described first pressure transmitter is defeated for tube side inlet ductwork
Go out the first frequency conversion motor controlled end that termination drives the first pump.
3. the combined LNG gasification system of air temperature type according to claim 2 it is characterised in that：Described 3rd heat exchanger
Shell-side outlet draws the second pressure transmitter equipped with response liquid petroleum gas (liquid propane gas) temperature for the pipeline, the control of described second pressure transmitter
Output termination drives the second frequency conversion motor controlled end of the second pump.
4. the combined LNG gasification system of air temperature type according to claim 3 it is characterised in that：Described 3rd heat exchanger
For shell-and-tube exchanger, the carbon steel making of its shell side, heat exchanger tube is austenitic stainless steel finned tube.
5. the combined LNG gasification system of air temperature type according to claim 4 it is characterised in that：Described first and second heat
Exchanger is air-heating type gasifier, and its heat exchanger tube is the high fin heat exchange pipe of the outer attached aluminum fin-stock of carbon steel base tube.
6. adopt the gasification process of the combined LNG gasification system of the arbitrary described air temperature type of claim 1 to 6 it is characterised in that：
By the first pump, liquified natural gas is inputted the 3rd heat exchanger tube pass, control its input flow rate 150,000 190000 kg/
H, pressure 5.5 6.5 Mpa, fully gasification output after First Heat Exchanger again after preliminary gasification；
By the second pump by liquid petroleum gas (liquid propane gas) input the second heat exchanger tube pass, control its input flow rate 300000 500000kg/h,
Pressure 0.2 0.5Mpa；By second heat exchanger tube pass output gaseous propane input the 3rd heat exchanger shell side, by with liquid
The second pump is returned after natural gas heat exchange liquefaction；
By the first blower fan, air is inputted the shell side of First Heat Exchanger, air velocity controls in 300 500m3/ s, with preliminary gas
The natural gas heat exchange changed makes it fully gasify；
By the second blower fan, air is inputted the shell side of the second heat exchanger, air velocity controls with 2000 2500m3/ s, with liquid
State propane heat exchange is vaporized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611000687.4A CN106402650A (en) | 2016-11-14 | 2016-11-14 | Air-temperature type combined LNG gasification system and gasification method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611000687.4A CN106402650A (en) | 2016-11-14 | 2016-11-14 | Air-temperature type combined LNG gasification system and gasification method |
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| CN106402650A true CN106402650A (en) | 2017-02-15 |
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| CN201611000687.4A Pending CN106402650A (en) | 2016-11-14 | 2016-11-14 | Air-temperature type combined LNG gasification system and gasification method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839563A (en) * | 2017-03-21 | 2017-06-13 | 中冶东方控股有限公司 | A kind of refrigeration system of utilization cold energy of liquefied natural gas |
| CN106870938A (en) * | 2017-03-09 | 2017-06-20 | 中国石油大学(华东) | A kind of fin-tube type intermediate medium gasifier |
| CN108826013A (en) * | 2018-06-27 | 2018-11-16 | 山东交通学院 | A kind of liquefied gas carrier unloading regas system |
| CN109630877A (en) * | 2018-11-14 | 2019-04-16 | 江苏科技大学 | A kind of LNG regas system and working method |
| CN111692524A (en) * | 2020-06-19 | 2020-09-22 | 江苏科技大学 | LNG regasification experimental system and experimental method |
| CN114001279A (en) * | 2021-10-28 | 2022-02-01 | 苏州圣汇装备有限公司 | Gas supply process for marine fuel tank |
| CN117146185A (en) * | 2023-09-12 | 2023-12-01 | 中海石油气电集团有限责任公司 | Liquefied natural gas gasification system using air as heat source |
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