CN218510696U - System for utilize indirect gasification LNG of tail gas - Google Patents
System for utilize indirect gasification LNG of tail gas Download PDFInfo
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- CN218510696U CN218510696U CN202222117110.9U CN202222117110U CN218510696U CN 218510696 U CN218510696 U CN 218510696U CN 202222117110 U CN202222117110 U CN 202222117110U CN 218510696 U CN218510696 U CN 218510696U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model relates to a gasification system of liquefied natural gas, concretely relates to utilize indirect system of gasification LNG of tail gas, this system includes heat exchanger, heat exchange fluid medium accumulator and vaporizer. The system absorbs heat energy from the combustion tail gas of the ship engine to the heat exchange fluid medium through the heat exchanger, and on the other hand, the heat exchange fluid medium after absorbing heat is provided into the gasifier to exchange heat with the liquefied natural gas, so that the liquefied natural gas is gasified by indirectly utilizing the heat energy of the combustion tail gas, the gasification process is not influenced by the environment temperature and the navigation position, and the gasification effect is stable and reliable.
Description
Technical Field
The utility model relates to a gasification system of liquefied natural gas, concretely relates to utilize indirect system of gasification LNG of tail gas.
Background
The gaseous natural gas fuel required by the engine of a natural gas fueled ship (natural gas fueled ship) needs to be gasified to supply liquid natural gas to the internal combustion engine for combustion, so that the power for propelling the ship is provided. Generally, air bath type gasification and water bath type gasification are adopted to gasify Liquefied Natural Gas (LNG) to obtain gaseous natural gas required by combustion of a ship, but these gasification methods need appropriate air temperature and water temperature to meet the LNG gasification requirements, and the conditions are influenced by seasons and ship sailing positions, and the air temperature and the water temperature are difficult to keep stable, so that the gasification effects are different.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an utilize system of indirect gasification LNG of tail gas aims at reducing season and geographical position to the LNG gasification's of natural gas fuel power ship influence, stably realizes the gasification of marine LNG.
For solving the above technical problem, the utility model discloses the technical scheme who adopts does:
a system for indirectly gasifying LNG by utilizing tail gas comprises a heat exchanger, a heat exchange fluid medium storage and a gasifier; wherein, the heat exchanger is connected with a tail gas inlet pipe and a tail gas outlet pipe; the heat exchange fluid medium reservoir is internally provided with a heat exchange fluid medium; a first heat exchange fluid medium circulating pipeline is arranged between the heat exchange fluid medium storage and the heat exchanger; the inlet and the outlet of the first heat exchange fluid medium circulating pipeline are both arranged in the heat exchange fluid medium storage device, and at least one part of the first heat exchange fluid medium circulating pipeline is positioned in the heat exchanger; a liquefied natural gas heat exchange pipe is arranged in the gasifier; one end of the liquefied natural gas heat exchange pipe is communicated with a liquefied natural gas liquid inlet pipe arranged outside the gasifier, and the other end of the liquefied natural gas heat exchange pipe is communicated with a gaseous natural gas outlet pipe arranged outside the gasifier; a second heat exchange fluid medium circulation pipeline is arranged between the gasifier and the heat exchange fluid medium storage.
In particular, the heat exchanger receives heat exchange fluid medium provided from a heat exchange fluid medium reservoir. The heat exchange fluid medium exchanges heat with combustion exhaust gas of the ship engine flowing through the heat exchanger in the heat exchanger, is heated and then returns to the heat exchange fluid medium storage. The heat exchange fluid medium reservoir provides heated heat exchange fluid medium to the gasifier. The heated heat exchange fluid medium is subjected to heat exchange with the liquefied natural gas flowing through the gasifier in the gasifier and cooled and then returned to the heat exchange fluid medium storage. The liquefied natural gas is heat exchanged within the gasifier with a heated heat exchange fluid medium flowing through the gasifier and is gasified to gaseous natural gas.
Therefore, the system absorbs heat energy from the combustion tail gas of the ship engine to the heat exchange fluid medium through the heat exchanger, and on the other hand, the heat exchange fluid medium after absorbing heat is provided into the gasifier to exchange heat with the liquefied natural gas, so that the liquefied natural gas is gasified by indirectly utilizing the heat energy of the combustion tail gas, the gasification process is not influenced by the environment temperature and the navigation position, and the gasification effect is stable and reliable.
In some embodiments, the system further comprises an exhaust pipe; the exhaust pipe is communicated with the heat exchange fluid medium storage.
The exhaust pipe can exhaust high-pressure gas generated by heating of a heat exchange fluid medium in the system, and release the pressure of the system, so that the safe operation of the system is ensured.
In some embodiments, the system further comprises a heat exchange fluid medium make-up tube; the heat exchange fluid medium replenishing pipe is communicated with the heat exchange fluid medium storage.
Heat exchange fluid media volatilized due to high temperature can be supplemented into the system through the heat exchange fluid media supplementing pipe, so that the system is ensured to have enough heat exchange media, and the heat exchange efficiency is ensured.
In some embodiments, the system further comprises a first circulation pump; the first circulation pump is provided on the first heat exchange fluid medium circulation line.
The first circulating pump can increase the circulating speed of the heat exchange fluid medium between the heat exchanger and the heat exchange fluid medium storage, so that the heat exchange efficiency is improved.
In some embodiments, the system further comprises a temperature detection unit; the temperature detection unit is mounted on the heat exchange fluid medium reservoir and is used for detecting the temperature of the heat exchange fluid medium in the heat exchange fluid medium reservoir.
The temperature detection unit can monitor the temperature of the heat exchange fluid medium in the heat exchange fluid medium storage in real time, so that the temperature of the heat exchange fluid medium is ensured to be suitable for heat exchange with the liquefied natural gas, and the temperature of the heat exchange fluid medium is prevented from being too high or too low.
In some embodiments, the system further comprises a control valve; the control valve is provided on the first heat exchange fluid medium circulation line.
The control valve can cut off the circulation of the heat exchange fluid medium between the heat exchanger and the heat exchange fluid medium storage, and can be matched with the temperature detection unit to further improve the automation degree of the system.
In some embodiments, the system further comprises a second circulation pump; the second circulation pump is provided on the second heat exchange fluid medium circulation line.
The second circulating pump can enhance the circulating speed of the heat exchange fluid medium between the gasifier and the heat exchange fluid medium storage, so that the heat exchange efficiency is improved.
In some embodiments, the heat exchange fluid medium is water; the heat exchange fluid medium reservoir is a water tank.
The water has low price, convenient acquisition and obvious heat exchange effect.
In some embodiments, the gasifier is a water bath gasifier.
The water bath type gasifier is matched with water energy to reduce investment to the maximum extent, and the gasification effect is guaranteed.
In some embodiments, the heat exchange fluid medium reservoir is an expansion vessel, such that the volume of the heat exchange fluid medium reservoir can be adapted according to the temperature of the heat exchange fluid medium, avoiding excessive pressure in the heat exchange fluid medium reservoir.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The definitions of the reference symbols in the figures are: the system comprises an air outlet pipe 1, a heat exchanger 2, a tail gas inlet pipe 3, a first heat exchange fluid medium liquid return pipe 4, a control valve 5, a first circulating pump 6, a first heat exchange fluid medium liquid supply pipe 7, a temperature detection unit 8, an air outlet pipe 9, a heat exchange fluid medium supplement pipe 10, a heat exchange fluid medium storage 11, a second heat exchange fluid medium liquid return pipe 12, a second circulating pump 13, a second heat exchange fluid medium liquid supply pipe 14, a gasifier 15, a liquefied natural gas heat exchange pipe 16, a liquefied natural gas liquid inlet pipe 17 and a gaseous natural gas air outlet pipe 18.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If there are terms described as first, second, etc. for the purpose of distinguishing between technical features, they are not to be construed as indicating or implying any relative importance or to imply that the number of technical features indicated is numerical or that the precedence of technical features indicated is numerical.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiment of the application utilizes the burning tail gas that produces when boats and ships engine burning as the heat source in order to realize carrying out the heat exchange with liquefied natural gas to gasify liquefied natural gas into the natural gas and use for the engine burning of boats and ships.
As shown in fig. 1, a system for indirectly gasifying LNG using tail gas according to an embodiment of the present invention includes a heat exchanger 2, a heat exchange fluid medium storage 11, and a gasifier 15.
The heat exchange fluid medium reservoir 11 is filled with a heat exchange fluid medium, such as water, nanofluid, mineral hydraulic oil, and the like. The heat exchange fluid medium reservoir 11 provides on the one hand a heat exchange fluid medium to the heat exchanger 2 for heat exchange with the combustion exhaust gases of the marine engine to obtain a high temperature heat exchange fluid medium and on the other hand a high temperature heat exchange fluid medium to the gasifier 15 for gasifying the liquefied natural gas.
The heat exchanger 2 is used for transferring high temperature in the combustion exhaust gas of the ship engine to the heat exchange fluid medium, so that the temperature of the heat exchange fluid medium is increased for being used as a heat source of the gasifier 15. Meanwhile, the heat exchanger 2 also effectively recovers the tail gas waste heat of the ship engine, realizes the recovery and reutilization of energy, and saves energy.
Specifically, the heat exchanger 2 has an air inlet and an air outlet, the air inlet of the heat exchanger 2 is communicated with the tail gas inlet pipe 3, and the air outlet of the heat exchanger 2 is communicated with the air outlet pipe 1. A first heat exchange fluid medium circulation line is also provided between the heat exchange fluid medium reservoir 11 and the heat exchanger 2. The inlet and outlet of the first heat exchange fluid medium circulation line are both arranged in the heat exchange fluid medium reservoir 11 and at least a part of the first heat exchange fluid medium circulation line is located in the heat exchanger 2. In detail, a heat exchange fluid medium heat exchange tube is arranged in the heat exchanger 2, the heat exchange fluid medium heat exchange tube has a liquid inlet and a liquid outlet, the liquid inlet of the heat exchange fluid medium heat exchange tube is communicated with the liquid outlet of the heat exchange fluid medium reservoir 11 through a first heat exchange fluid medium supply tube 7, and the liquid outlet of the heat exchange fluid medium heat exchange tube is communicated with the liquid inlet of the heat exchange fluid medium reservoir 11 through a first heat exchange fluid medium return tube 4.
The heat exchange fluid medium in the heat exchange fluid medium reservoir 11 flows into the heat exchange fluid medium heat exchange tubes in the heat exchanger 2 through the first heat exchange fluid medium liquid supply tube 7 to exchange heat with the combustion tail gas, and the heated heat exchange fluid medium returns to the heat exchange fluid medium reservoir 11 through the first heat exchange fluid medium liquid return tube 4.
High-temperature combustion tail gas generated during combustion of a ship engine enters the heat exchanger 2 through the tail gas inlet pipe 3, and after heat exchange is carried out on the high-temperature combustion tail gas and a heat exchange fluid medium flowing through the heat exchanger 2, the combustion tail gas with certain heat recovered is directly emptied or subjected to other treatment through the gas outlet pipe 1.
After the heat exchange fluid medium in the heat exchange fluid medium storage 11 is circulated and sufficiently heat-exchanged with the combustion exhaust gas, the heat exchange fluid medium is not provided to the heat exchanger 2 any more after the temperature of the heat exchange fluid medium in the heat exchange fluid medium storage 11 reaches the required temperature, i.e., the heat exchange fluid medium meets the requirement.
The gasifier 15 is configured to exchange heat between the liquefied natural gas and the high-temperature heat exchange fluid medium, so that the liquefied natural gas absorbs heat carried by the high-temperature heat exchange fluid medium and is gasified into gaseous natural gas for use in combustion of the ship engine.
Specifically, the vaporizer 15 is provided with a liquefied natural gas heat exchange pipe 16 inside. One end of the liquefied natural gas heat exchange pipe 16 is communicated with a liquefied natural gas inlet pipe 17 arranged outside the gasifier 15, and the other end of the liquefied natural gas heat exchange pipe 16 is communicated with a gaseous natural gas outlet pipe 18 arranged outside the gasifier 15. A second heat-exchange fluid medium circulation pipeline is arranged between the gasifier 15 and the heat-exchange fluid medium reservoir 11, that is, the gasifier 15 has a liquid inlet and a liquid outlet, the liquid inlet of the gasifier 15 is communicated with the other liquid outlet of the heat-exchange fluid medium reservoir 11 through a second heat-exchange fluid medium supply pipe 14, and the liquid outlet of the gasifier 15 is communicated with the other liquid inlet of the heat-exchange fluid medium reservoir 11 through a second heat-exchange fluid medium return pipe 12.
The high-temperature heat exchange fluid medium in the heat exchange fluid medium storage 11 enters the gasifier 15 through the second heat exchange fluid medium liquid supply pipe 14 to exchange heat with the liquefied natural gas in the liquefied natural gas heat exchange pipe 16, and the heat exchange fluid medium after releasing heat returns to the heat exchange fluid medium storage 11 through the second heat exchange fluid medium liquid return pipe 12.
The liquefied natural gas enters the liquefied natural gas heat exchange pipe 16 in the gasifier 15 through the liquefied natural gas liquid inlet pipe 17, the liquefied natural gas in the liquefied natural gas heat exchange pipe 16 exchanges heat with the high-temperature heat exchange fluid medium flowing through the gasifier 15, and then absorbs the heat of the high-temperature heat exchange fluid medium, so that the liquefied natural gas is gasified into the gaseous natural gas, and the gaseous natural gas is supplied to the ship engine for combustion through the gaseous natural gas outlet pipe 18.
The circulation of the heat exchange fluid medium between the heat exchanger 2, the heat exchange fluid medium reservoir 11 and the vaporizer 15 ensures that the temperature of the heat exchange fluid medium for heat exchange with the liquefied natural gas is always satisfactory and that the vaporization operation is not affected by the season and the ship's sailing position.
If the heat exchange fluid medium in the heat exchange fluid medium storage 11 generates a certain amount of volatile gas due to temperature increase, the pressure in the heat exchanger 2, the first heat exchange fluid medium supply pipe 7, the first heat exchange fluid medium return pipe 4 and the heat exchange fluid medium storage 11 will increase, and at this time, an exhaust pipe 9 for exhausting a part of volatile gas to release the pressure in the system may be disposed on the heat exchange fluid medium storage 11.
Meanwhile, after the liquefied natural gas is gasified into the gaseous natural gas, the pressure in the gasifier 15, the liquefied natural gas inlet pipe 17, the gaseous natural gas outlet pipe 18 and the heat exchange fluid medium storage 11 is increased, and the exhaust pipe 9 can release corresponding pressure.
It should be noted that the volume of the heat exchange fluid medium reservoir 11 itself can also bear a part of the system pressure, and even the heat exchange fluid medium reservoir 11 can be made of a thermal expansion material to form an expansion vessel, so that the volume of the heat exchange fluid medium reservoir 11 can be adaptively changed according to the temperature of the heat exchange fluid medium, and excessive pressure generated in the heat exchange fluid medium reservoir 11 can be avoided. It is still not as safe as providing an exhaust pipe 9.
The exhaust pipe 9 can take away a part of heat exchange fluid medium while discharging high-pressure gas and releasing system pressure, and the heat exchange fluid medium is continuously reduced in the past, so that the heat exchange efficiency with combustion tail gas or liquefied natural gas is influenced. A heat exchange fluid medium replenishing pipe 10 may be further provided in the heat exchange fluid medium reservoir 11 so as to replenish the corresponding heat exchange fluid medium.
The first heat exchange fluid medium supply pipe 7 and the first heat exchange fluid medium return pipe 4 between the heat exchange fluid medium reservoir 11 and the heat exchanger 2 may be arranged in a relatively horizontal manner such that the heat exchange fluid medium circulates in a free-flowing manner between the heat exchange fluid medium reservoir 11 and the heat exchanger 2. However, in this case, the flow rate is slow, which affects the heat exchange efficiency. Therefore, in the embodiment of the present application, a first circulation pump 6 may be further added to the first heat-exchange fluid medium supply pipe 7 or the first heat-exchange fluid medium return pipe 4, so that the heat-exchange fluid medium can rapidly circulate and flow between the heat-exchange fluid medium storage 11 and the heat exchanger 2, thereby increasing the heat exchange efficiency.
To facilitate monitoring of the heat exchange fluid medium in the heat exchange fluid medium reservoir 11 for a temperature required by the vaporizer 15, a temperature sensing unit 8 may be provided in the heat exchange fluid medium reservoir 11. The temperature detection unit 8 may be a temperature transmitter, a temperature sensor or the like to detect the temperature of the heat exchange fluid medium reservoir 11 at any time. When the temperature reaches the corresponding requirement, the supply of the heat exchange fluid medium to the heat exchanger 2 is stopped.
In order to facilitate the shut-off of the transfer of heat exchange fluid medium between the heat exchanger 2 and the heat exchange fluid medium reservoir 11, a control valve 5 may be added to the first heat exchange fluid medium supply line 7 or the first heat exchange fluid medium return line 4. The control valve 5 can also form linkage control with the temperature detection unit 8, and is assisted by a corresponding control element, when the temperature detection unit 8 detects that the heat exchange fluid medium of the heat exchange fluid medium storage 11 reaches the temperature required by the gasifier 15, the control valve 5 is automatically closed, and the flow of the heat exchange fluid medium is cut off, so that the automation degree of the system is improved, and the manual participation is reduced.
Correspondingly, the second heat-exchange fluid medium supply line 14 and the second heat-exchange fluid medium return line 12 between the heat-exchange fluid medium reservoir 11 and the evaporator 15 can also be arranged in a relatively horizontal manner. However, in order to improve the heat exchange efficiency, a second circulation pump 13 may be additionally provided to the second heat exchange fluid medium supply pipe 14 or the second heat exchange fluid medium return pipe 12.
In view of economic practicality, in the embodiment of the present application, the heat exchange fluid medium may be directly selected as water, and the corresponding heat exchange fluid medium reservoir 11 is a water tank. Correspondingly, the vaporizer 15 may be a water bath vaporizer.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above preferred embodiments should not be considered as limiting the invention, which is intended to be limited only by the scope of the appended claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (10)
1. A system for indirect gasification of LNG using tail gas, the system comprising:
the heat exchanger is connected with a tail gas inlet pipe and a tail gas outlet pipe;
a heat exchange fluid medium reservoir filled with a heat exchange fluid medium; a first heat exchange fluid medium circulating pipeline is arranged between the heat exchange fluid medium storage and the heat exchanger; the inlet and the outlet of the first heat exchange fluid medium circulation pipeline are both arranged in the heat exchange fluid medium reservoir, and at least one part of the first heat exchange fluid medium circulation pipeline is positioned in the heat exchanger; and the number of the first and second groups,
the gasifier is internally provided with a liquefied natural gas heat exchange pipe; one end of the liquefied natural gas heat exchange pipe is communicated with a liquefied natural gas liquid inlet pipe arranged outside the gasifier, and the other end of the liquefied natural gas heat exchange pipe is communicated with a gaseous natural gas outlet pipe arranged outside the gasifier; and a second heat exchange fluid medium circulating pipeline is arranged between the gasifier and the heat exchange fluid medium storage.
2. The system for indirectly gasifying LNG using tail gas of claim 1, further comprising a vent pipe; the exhaust pipe is communicated with the heat exchange fluid medium storage.
3. The system for the indirect gasification of LNG with tail gas of claim 1, further comprising a heat exchange fluid medium make-up line; the heat exchange fluid medium replenishing pipe is communicated with the heat exchange fluid medium storage.
4. The system for indirectly gasifying LNG using the tail gas of claim 1, further comprising a first circulation pump; the first circulation pump is provided on the first heat exchange fluid medium circulation line.
5. The system for indirectly gasifying LNG using tail gas of claim 4, wherein the system further comprises a temperature detection unit; the temperature detection unit is mounted on the heat exchange fluid medium reservoir and is used for detecting the temperature of the heat exchange fluid medium in the heat exchange fluid medium reservoir.
6. The system for indirectly vaporizing LNG from tail gas of claim 5 further comprising a control valve; the control valve is provided on the first heat exchange fluid medium circulation line.
7. The system for indirectly gasifying LNG using tail gas of claim 1, further comprising a second circulation pump; the second circulation pump is provided on the second heat exchange fluid medium circulation line.
8. The system for indirect gasification of LNG with tail gas according to claim 1, wherein the heat exchange fluid medium is water; the heat exchange fluid medium reservoir is a water tank.
9. The system for indirectly gasifying LNG using the tail gas of claim 8, wherein the gasifier is a water bath gasifier.
10. The system for the indirect gasification of LNG with tail gas as claimed in claim 1, wherein said heat exchange fluid medium reservoir is an expansion vessel.
Priority Applications (1)
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CN202222117110.9U CN218510696U (en) | 2022-08-11 | 2022-08-11 | System for utilize indirect gasification LNG of tail gas |
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CN202222117110.9U CN218510696U (en) | 2022-08-11 | 2022-08-11 | System for utilize indirect gasification LNG of tail gas |
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CN202222117110.9U Active CN218510696U (en) | 2022-08-11 | 2022-08-11 | System for utilize indirect gasification LNG of tail gas |
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