CN206429866U - A kind of combined LNG gasification system of air temperature type - Google Patents
A kind of combined LNG gasification system of air temperature type Download PDFInfo
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- CN206429866U CN206429866U CN201621222586.7U CN201621222586U CN206429866U CN 206429866 U CN206429866 U CN 206429866U CN 201621222586 U CN201621222586 U CN 201621222586U CN 206429866 U CN206429866 U CN 206429866U
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Abstract
The utility model is related to a kind of combined LNG gasification system of air temperature type, belongs to natural gas application technology field.The system includes first, second, third heat exchanger respectively with tube side and shell side, the tube side inlet ductwork of 3rd heat exchanger is equipped with the first pump for being controlled by the 3rd heat exchanger tube pass entrance liquified natural gas temperature, and the tube side export pipeline of the 3rd heat exchanger connects liquified natural gas gasification output pipe by the tube side of First Heat Exchanger；The shell-side outlet pipeline of 3rd heat exchanger connects the tube-side inlet of the second heat exchanger through being controlled by the second pump of the second heat exchanger tube pass entrance LPG temperature, the tube side outlet gaseous propane pipeline of second heat exchanger connects the shell side inlet of the 3rd heat exchanger, forms winding heat exchange pipe.The utility model uses air as thermal source completely, without ancillary heating equipment, using scope no matter seashore, inland, it is to avoid pipeline outer wall freezes, and is readily transported and safeguards.
Description
Technical field
The utility model is related to a kind of LNG gasification device, especially a kind of combined LNG gasification system of air temperature type, simultaneously
Corresponding gasification process is provided, 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, by air and low temperature LNG direct heat transfers, as a result to easily cause heat exchange pipe outer wall frosting.
Intermediate medium gasification is the conventional gasification mode of current LNG receiving stations.Knowable to retrieval, utility model patent
CN201110333054.6, which discloses a kind of utilization intermediate medium, makes the system and method for liquefied natural gas vaporization, the gasification system
Comprising the upper chamber and lower cavity being mutually communicated, liquefied natural gas is heated using the latent heat of vaporization of intermediate medium, it is middle
Medium condensation enters lower cavity, is heated again, forms circulation.Fluid for heating intermediate medium is usually seawater or normal
Warm water, the use region of equipment is limited by the sea if using seawater；Such as heated using normal-temperature water, the water after being cooled needs to make
Heated again with large-scale firing equipment, otherwise can the wasting of resources；And water temperature is influenceed larger by weather, winter easily freezes；
Furthermore, no matter substantial amounts of kinetic energy is both needed to using seawater or normal-temperature water, above-mentioned reason can cause apparatus structure complexity, cost of investment
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, and with the function of preventing from freezing, but this structure causes heat-exchanging tube bundle
Length increase, and because thermal source only has seawater, therefore the gasifier field of employment of the pattern is limited by the sea.Another China is practical
New patent CN202834735U discloses a kind of intermediate medium gasifier, and one is integrated in by three different heat exchangers of function
In big equipment, its compact conformation, amount of vaporization is big.But the gasifier is complicated, technological requirement is high, manufacture, maintenance and transport
Difficulty is larger.Chinese utility model patent CN1793715A discloses a kind of air-heating type gasifier, and by upstream NG, (gaseous state is natural
Gas) mixed with low temperature LNG after enter back into gasifier and rise to normal temperature, it is to avoid low temperature LNG directly and air contact, but the gasification
Device is simply heated up NG, does not play a part of the LNG that gasifies.
Utility model content
The purpose of this utility model is：The shortcoming existed for above-mentioned prior art, proposes a kind of not only manufacture, safeguards
It is convenient, and without the combined LNG gasification system of air temperature type of heat resource equipment, while corresponding gasification process is provided, so as to
While LNG gasification efficiency is ensured, because energy-conserving and environment-protective, application scenario are unrestricted, and to be able to practical popularization and application.
In order to reach object above, the combined LNG gasification system of air temperature type of the present utility model includes having tube side respectively
With first, second, third heat exchanger of shell side, the tube side inlet ductwork of the 3rd heat exchanger, which is equipped with, is controlled by the 3rd heat exchanger
First pump of tube-side inlet liquified natural gas temperature, the pipe that the tube side export pipeline of the 3rd heat exchanger passes through First Heat Exchanger
Liquified natural gas gasification output pipe is connect by the tube side outlet of First Heat Exchanger after journey entrance；The shell side of 3rd heat exchanger goes out
Mouthful draw the second pump that pipeline is subjected to controlling in the second heat exchanger tube pass entrance LPG temperature and connect the tube side of the second heat exchanger
Mouthful, the shell side inlet that gaseous propane pipeline connects the 3rd heat exchanger is drawn in the tube side outlet of second heat exchanger, forms winding heat
Exchange pipeline；The shell side inlet of the shell side inlet of the First Heat Exchanger and the second heat exchanger connects the first blower fan and the second wind respectively
The shell-side outlet of the air outlet of machine, the shell-side outlet of the First Heat Exchanger and the second heat exchanger connects air respectively.
The corresponding gasification process of the utility model includes：
By the first pump by liquified natural gas input the 3rd heat exchanger tube pass, control its input flow rate 150000-
190000kg/h, 5.5-6.5Mpa of pressure, the fully gasification output after First Heat Exchanger again after preliminary gasification；
By the second pump by LPG input the second heat exchanger tube pass, control its input flow rate 300000-
500000kg/h, 0.2-0.5Mpa of pressure；The gaseous propane that second heat exchanger tube pass is exported inputs the shell of the 3rd heat exchanger
Journey, by with returning to the second pump after liquified natural gas heat exchange liquefaction；
Air is inputted to the shell side of First Heat Exchanger by the first blower fan, air velocity is controlled in 300-500m3/ s, with
The natural gas heat exchange tentatively gasified makes it fully gasify；
Air is inputted to the shell side of the second heat exchanger by the second blower fan, air velocity is controlled with 2000-2500m3/
S, is vaporized with LPG heat exchange.
It can be appreciated that compared with prior art, the utility model has the advantages that：
1st, thermal source is used air as completely, without ancillary heating equipment.
2nd, due to air source extensively, therefore our bright use scope no matter seashore, inland.
3rd, intermediate medium is used pentane as, 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, it is ensured that -35 DEG C of liquified natural gas fully gasifies as more than -5 DEG C of day
Right gas output.
5th, it is readily transported and safeguards, can be flexibly installed according to field condition.
Brief description of the drawings
The utility model is further described below in conjunction with the accompanying drawings.
Fig. 1 constitutes sketch for the system of the utility model one embodiment.
Fig. 2 arranges sketch for the equipment of Fig. 1 embodiments.
Wherein：First Heat Exchanger Y, the second heat exchanger E, the 3rd heat exchanger S, the first pump 1, the first variable-frequency motor 2, first pressure
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 and become
Frequency motor 19, the second pump 20.
Embodiment
Embodiment one
The combined LNG gasification system of air temperature type of the present embodiment as shown in figure 1, including having the of tube side and shell side respectively
First, second, third heat exchanger Y, E, S, wherein the 3rd heat exchanger S tube side inlet ductwork is managed equipped with the 3rd heat exchanger S is controlled by
First pump 1 of the liquified natural gas temperature of journey entrance 5 and the first pressure transmitter 3 for responding liquified natural gas temperature, the 3rd changes
Liquid is connect by First Heat Exchanger Y tube side outlet 10 after the tube-side inlet 9 that hot device S tube side export pipeline 6 passes through First Heat Exchanger Y
State natural gas gasifying output pipe.The control output end of first pressure transmitter connect driving the first pump 1 the first variable-frequency motor 2 by
Control end, thus can conveniently realize control 150000-190000kg/h of input flow rate of liquified natural gas, pressure 5.5-
6.5Mpa, is allowed to after the 3rd heat exchanger S tentatively gasification the fully gasification output after First Heat Exchanger Y again.
3rd heat exchanger S shell-side outlet 4 draws pipeline and is subjected to controlling in the LPG temperature of the second heat exchanger E tube-side inlets 17
Second pump 20 of degree connects the second heat exchanger E tube-side inlets 17, and gaseous propane pipeline 14 is drawn in the second heat exchanger E tube side outlet 14
The 3rd heat exchanger S shell side inlet 7 is connect, winding heat exchange pipe is formed.The shell-side outlet 4 of 3rd heat exchanger is drawn pipeline and also filled
There is the second pressure transmitter 18 of response LPG temperature, the control output end of the second pressure transmitter connects the second pump of driving
20 controlled end of the second variable-frequency motor 19, therefore control LPG the second heat exchanger E tube sides of input can be conveniently realized
300000-500000kg/h of flow, 0.2-0.5Mpa of pressure, are allowed to export gaseous propane through the second heat exchanger E tube sides, then enter
Enter the 3rd heat exchanger S shell side, by with returning to the second pump 20 after liquified natural gas heat exchange liquefaction.
First Heat Exchanger Y shell side inlet 11 connects the air outlet of the first blower fan 12, and First Heat Exchanger Y shell-side outlet 8 connects
Air.Therefore air can be inputted to First Heat Exchanger Y shell side by the first blower fan 12, the actual control of air velocity exists
300—500m3/ s, makes it fully gasify with the natural gas heat exchange tentatively gasified.
Second heat exchanger E shell side inlet 15 connects the air outlet of the second blower fan 13, and the second heat exchanger E shell-side outlet 16 connects
Air.Therefore can by the second blower fan by air input the second heat exchanger shell side, air velocity it is actual control with
2000—2500m3/ s, is vaporized with LPG heat exchange.
Actual motion is as shown in Fig. 2-170-- 160 DEG C of LNG is entered and led to 150000-190000kg/h flow
Cross and enter its tube side as the tube-side inlet of the shell-and-tube exchanger of the 3rd heat exchanger, the manipulation pressure of tube side for 5.5-
6.5Mpa, LNG are exported into substantially air-heating type gasifier by the NG for being about-35-- 30 DEG C for temperature that gasifies, NG from tube side
In the pipe of First Heat Exchanger, operating pressure is still 5.5-6.5Mpa in pipe, after being heated through air, NG temperature reach-5 DEG C with
On, left from air-heating type gasifier outlet and be transported to appointed place.The shell side of the shell-and-tube exchanger makes of carbon steel, changes
Heat pipe is austenitic stainless steel finned tube.
The shell side of 3rd heat exchanger is saturation propane gas, and operating pressure is 0.2-0.5Mpa, and the flow of propane vapor is
300000-500000kg/h, propane gas leaves the shell-and-tube exchanger after being condensed by the outlet of its shell side, by
Entering after two pump pressure contracting superchargings in pipe of the essence also for the second heat exchanger of air-heating type gasifier, operating pressure remains as 0.2-
0.5Mpa, after being heated through air, propane is gasified, and returning to shell-and-tube exchanger shell side from the outlet of the air-heating type gasifier enters
Mouthful, carry out the heat exchange of subsequent cycle.As the air-heating type gasifier of first, second heat exchanger, its heat exchanger tube is carbon steel base tube
The high fin heat exchange pipe of outer attached aluminum fin-stock.
With below 10 DEG C of ground temperature, air exit temp be designed more than -4 DEG C, be used as the air temperature of the second heat exchanger
The size of formula gasifier is 35000 × 2700 × 100mm, and the fan total blast volume of outfit is about 2000-2500m3/ s, motor is total
Power is 8.2-8.8kW；It is 20000 × 6000 × 200mm as the size of the air-heating type gasifier of First Heat Exchanger, is equipped with
Fan total blast volume be about 300-500m3/ s, motor general power is less than 1kW.
In addition to the implementation, the utility model can also have other embodiment.All use equivalent substitutions or equivalent change
The technical scheme to be formed is changed, the protection domain of the utility model requirement is all fallen within.
Claims (5)
1. a kind of combined LNG gasification system of air temperature type, it is characterised in that：Including having the first of tube side and shell side respectively, the
2nd, the 3rd heat exchanger, the tube side inlet ductwork of the 3rd heat exchanger (S), which is equipped with, is controlled by the 3rd heat exchanger tube pass entrance (5)
The first pump (1) of liquified natural gas temperature, the tube side export pipeline (6) of the 3rd heat exchanger passes through First Heat Exchanger (Y)
Liquified natural gas gasification output pipe is connect by First Heat Exchanger tube side outlet (10) after tube-side inlet (9)；3rd heat exchanger
Shell-side outlet (4) draw the second pump (20) that pipeline is subjected to controlling in second heat exchanger tube pass entrance (17) LPG temperature and connect
The tube-side inlet of second heat exchanger (E), tube side outlet (14) the extraction gaseous propane pipeline of second heat exchanger connects the 3rd and changed
The shell side inlet (7) of hot device, forms winding heat exchange pipe；The shell side inlet (11) of the First Heat Exchanger and the second heat exchanger
Shell side inlet (15) connect the air outlet of the first blower fan (12) and the second blower fan (13) respectively, the shell side of the First Heat Exchanger goes out
The shell-side outlet (16) of mouth (8) and the second heat exchanger connects air respectively.
2. the combined LNG gasification system of air temperature type according to claim 1, it is characterised in that：3rd heat exchanger
First pressure transmitter of the tube side inlet ductwork equipped with response liquified natural gas temperature, the control of the first pressure transmitter is defeated
Go out the first variable-frequency motor controlled end of termination the first pump of driving.
3. the combined LNG gasification system of air temperature type according to claim 2, it is characterised in that：3rd heat exchanger
Shell-side outlet draws second pressure transmitter of the pipeline equipped with response LPG temperature, the control of the second pressure transmitter
Second variable-frequency motor controlled end of output termination the second pump of driving.
4. the combined LNG gasification system of air temperature type according to claim 3, it is characterised in that：3rd heat exchanger is
Shell-and-tube exchanger, its shell side makes of carbon steel, and 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 change
Hot device is air-heating type gasifier, and its heat exchanger tube is the high fin heat exchange pipe of attached aluminum fin-stock outside carbon steel base tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222586.7U CN206429866U (en) | 2016-11-14 | 2016-11-14 | A kind of combined LNG gasification system of air temperature type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621222586.7U CN206429866U (en) | 2016-11-14 | 2016-11-14 | A kind of combined LNG gasification system of air temperature type |
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| CN206429866U true CN206429866U (en) | 2017-08-22 |
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| CN201621222586.7U Active CN206429866U (en) | 2016-11-14 | 2016-11-14 | A kind of combined LNG gasification system of air temperature type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402650A (en) * | 2016-11-14 | 2017-02-15 | 航天晨光股份有限公司 | Air-temperature type combined LNG gasification system and gasification method |
| CN110243125A (en) * | 2019-06-18 | 2019-09-17 | 烟台睿加节能科技有限公司 | A kind of step storage of LNG cold energy and utilize device |
-
2016
- 2016-11-14 CN CN201621222586.7U patent/CN206429866U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402650A (en) * | 2016-11-14 | 2017-02-15 | 航天晨光股份有限公司 | Air-temperature type combined LNG gasification system and gasification method |
| CN110243125A (en) * | 2019-06-18 | 2019-09-17 | 烟台睿加节能科技有限公司 | A kind of step storage of LNG cold energy and utilize device |
| CN110243125B (en) * | 2019-06-18 | 2024-03-15 | 烟台睿加节能科技有限公司 | Cascade storage and utilization device of LNG cold energy |
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