CN109506127B - Horizontal heat pipe liquefied natural gas gasifier - Google Patents
Horizontal heat pipe liquefied natural gas gasifier Download PDFInfo
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- CN109506127B CN109506127B CN201811570961.0A CN201811570961A CN109506127B CN 109506127 B CN109506127 B CN 109506127B CN 201811570961 A CN201811570961 A CN 201811570961A CN 109506127 B CN109506127 B CN 109506127B
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- heat exchange
- tube
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- heat
- circulating water
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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
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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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
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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
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0316—Water heating
Abstract
The invention belongs to the technical field of liquefied natural gas, in particular to a horizontal heat pipe liquefied natural gas gasifier, which is provided for the existing natural gas gasification device to replace heat difference and severe frosting, which mainly comprises a hollow shell, wherein the left end and the right end of the hollow shell are respectively provided with a circulating water inlet and a circulating water outlet, a layering clapboard is arranged in the hollow shell and divides the circulating water inlet into a plurality of channels transversely towards the circulating water outlet, a heat exchange tube is arranged in each channel and comprises an outer heat exchange tube and an inner heat exchange tube, the outer heat exchange tube is a straight tube, the inner heat exchange tube is sleeved in the outer heat exchange tube and is eccentrically arranged near the upper part, an intermediate medium is further injected into the heat exchange outer pipe, the intermediate medium is located below the heat exchange inner pipe, the intermediate medium and the heat exchange inner pipe are not in contact, and the two ends of the heat exchange inner pipe are respectively communicated with the inlet header pipe and the outlet header pipe. The invention has simple structure and high heat exchange efficiency, and can avoid the problem of frosting during heat exchange.
Description
The technical field is as follows:
the invention belongs to the technical field of liquefied natural gas, and particularly relates to a horizontal heat pipe liquefied natural gas gasifier.
Background art:
natural gas is a green and environmentally friendly energy source recognized in the world at present, and natural gas is usually liquid, namely Liquefied Natural Gas (LNG), and needs to be gasified before being used, namely gasified Natural Gas (NG). Currently, there are three general types of large and medium-sized gasification devices: the open rack type gasifier, the intermediate medium gasifier and the immersion type gasifier are difficult to popularize and miniaturize in a large area due to the complex structure or the serious influence of the environmental temperature and huge investment; in contrast, conventional small-sized gasifiers are mainly air-temperature gasifiers, electric-heating gasifiers, steam-heating gasifiers, and the like. At present, the air-temperature type vaporizer is mainly used in the market, but the problem of serious frosting phenomenon exists. Current patent application number is 201710253818.8, and the patent name is a radial heat pipe formula liquefied natural gas vaporizer, and this patent application file adopts the heat exchange tube of nested formula design to adopt eccentric settings with the heat exchange tube outer tube in the heat exchange tube and heat exchange tube inner tube, avoid the problem of frosting, but because the heat exchange tube is whole to be soaked in heat source water, it has the not high problem of heat exchange efficiency again.
The invention content is as follows:
the invention provides a horizontal heat pipe liquefied natural gas gasifier for overcoming the defects, which not only avoids the problem of frosting, but also further improves the heat exchange efficiency of the gasifier.
The technical scheme adopted by the invention is as follows: a horizontal heat pipe liquefied natural gas gasifier comprises a hollow shell, an inlet header pipe and an outlet header pipe, wherein the inlet header pipe and the outlet header pipe are respectively positioned at the front side and the rear side of the hollow shell, a circulating water inlet and a circulating water outlet are respectively arranged at the left end and the right end of the hollow shell, a layering partition plate is arranged inside the hollow shell and divides the circulating water inlet into a plurality of channels transversely in the direction of the circulating water outlet, a heat exchange pipe is arranged in each channel and comprises an outer heat exchange pipe and an inner heat exchange pipe, the outer heat exchange pipe is a straight pipe, the inner heat exchange pipe is eccentrically sleeved in the outer heat exchange pipe by the upper part, the two ends of the outer heat exchange pipe are fixed on the inner heat exchange pipe, a closed space is formed between the outer heat exchange pipe and the inner heat exchange pipe, an intermediate medium is filled in the closed space and is positioned, and the intermediate medium is not contacted with the heat exchange inner pipe, and the two ends of the heat exchange inner pipe are respectively communicated with the inlet header pipe and the outlet header pipe.
Preferably, each heat exchange tube is fixed in the middle of each layer of channel through a support plate, the support plate vertically divides the channel into a closed space and a water circulation channel, the closed space is positioned above the water circulation channel, and the lower part of the heat exchange tube is positioned in the water circulation channel.
Preferably, more than two heat exchange tubes are arranged in each layer side by side, and the heat exchange inner tubes of every two adjacent heat exchange tubes are connected end to end through connecting elbows to form a curved serpentine pipeline.
Preferably, the intermediate medium is a heat conducting substance capable of realizing interconversion between a gas state and a liquid state through temperature difference.
Preferably, an inlet connecting flange and an outlet connecting flange are respectively arranged on the inlet header pipe and the outlet header pipe.
The invention has the beneficial effects that:
1. the whole device adopts horizontal arrangement, thereby reducing the height of the whole device and leading the installation, operation and maintenance of the device to be simpler and more convenient.
2. The invention designs a layered heating structure in the hollow shell, divides the hollow shell into a plurality of passages from the direction of a circulating water inlet to the direction of a circulating water outlet through the layered partition plates, and then utilizes a water circulating channel formed between the supporting plate and the layered partition plates to reduce the circulating area by nearly half and greatly improve the flow speed under the condition of the same sectional area of the circulating water inlet, thereby improving the heat exchange coefficient and obviously improving the heat exchange efficiency.
3. The heat exchange inner pipe loaded with the liquefied natural gas is nested in the heat exchange outer pipe, and the intermediate medium in the heat exchange outer pipe is heated, so that the liquefied natural gas is converted into the gaseous natural gas.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
wherein: the heat exchange device comprises a hollow shell 1, a circulating water inlet 11, a circulating water outlet 12, a layered partition plate 13, a supporting plate 14, an inlet header pipe 2, an inlet connecting flange 21, an outlet header pipe 3, an outlet connecting flange 31, a heat exchange outer pipe 4, a heat exchange inner pipe 5, an intermediate medium 6, a connecting elbow 7 and natural gas 8.
The specific implementation mode is as follows:
as shown in fig. 1 to 3, the present invention is a horizontal heat pipe liquefied natural gas gasifier, including a hollow shell 1, an inlet header pipe 2 and an outlet header pipe 3, wherein the hollow shell 1 is in a horizontal structure, the inlet header pipe 2 and the outlet header pipe 3 are respectively located at the front side and the rear side of the hollow shell 1, the inlet header pipe 2 is connected to a device for storing liquefied natural gas, and the outlet header pipe 3 is connected to a device for storing gaseous natural gas.
The left end and the right end of the hollow shell 1 are respectively provided with a circulating water inlet 11 and a circulating water outlet 12, and the circulating water inlet 11 and the circulating water outlet 12 are respectively communicated with heat source water to form a hot water circulating system. Inside being equipped with layering baffle 13 at hollow shell 1, layering baffle 13 transversely separates into many passageways with circulating water import 11 to circulating water export 12 directions, all is equipped with the heat exchange tube that converts liquefied natural gas into gaseous natural gas in every passageway, the heat exchange tube is tubular structure, and the heat exchange tube one end and the import header pipe 2 intercommunication that every layer set up, the other end and export header pipe 3 intercommunication.
The heat exchange tube includes heat transfer outer tube 4 and heat transfer inner tube 5, what heat transfer inner tube 5 chooseed for use is the low temperature heat pipe, heat transfer outer tube 4 is the straight tube, and the both ends of every heat transfer outer tube 4 are sealed through the head respectively, all overlaps in every heat transfer outer tube 4 is equipped with a heat transfer inner tube 5, and the tip of heat transfer outer tube 4 is all stretched out from at both ends in the heat transfer outer tube 4, makes and forms airtight space between heat transfer outer tube 4 and heat transfer inner tube 5, and the intussuseption of airtight space is filled with appropriate amount of liquid intermediate medium 6, and intermediate medium 6 is located the below of heat transfer inner tube 5 to intermediate medium 6 does not contact with heat transfer inner tube. The heat exchange inner tube 5 is eccentrically arranged on the upper part of the heat exchange outer tube 4, so that the heating area can be increased through eccentric arrangement, the heat exchange area is reduced, and the possibility of frosting the surface of the heat exchange tube is avoided.
In order to improve the heat exchange efficiency, more than two heat exchange tubes are arranged in each layer side by side, and the heat exchange inner tubes 5 of every two adjacent heat exchange tubes are connected end to end through connecting elbows 7 to form a curved snake-shaped pipeline. In order to facilitate the installation and operation of the device, the connecting elbow 7 is installed outside the hollow shell 1.
Each heat exchange tube arranged on each layer is horizontally fixed in the channel through a support plate 14, and the support plates 14 are positioned on two side walls of the long side of each heat exchange outer tube 4, so that the support plates 14 are divided into an upper part and a lower part. The support plate 14 not only provides structural support for the heat exchange outer tube 4, but also enables a closed space to be formed between the upper part of the support plate 14 and the adjacent layered partition plate 13 on the upper layer, enables a water circulation channel to be formed between the lower part of the support plate 14 and the adjacent layered partition plate 13 on the lower layer, and the height ratio of the closed space to the water circulation channel in each layer of channel is 1: 1. through the structure, under the condition of the same sectional area, the flow area can be reduced by half, the flow velocity is greatly improved, the heat exchange coefficient is improved, and the heat exchange effect is obviously improved, which is detailed in the following table.
And the lower part of the heat exchange outer pipe 4 is positioned in the water circulation channel and can be fully contacted with heat source water, so that the aim of heating the intermediate medium 6 in the heat exchange pipe layer by layer is fulfilled. In addition, the upper part of the heat exchange outer pipe 4 is positioned in the closed space and is not contacted with heat source water, namely, the heat exchange inner pipe 5 is still in a relatively low-temperature state, after the intermediate medium 6 is heated, the temperature difference between the heat exchange inner pipe 5 and the gasified intermediate medium 6 is large, and the heat exchange speed between the gasified intermediate medium 6 and the heat exchange inner pipe 5 is high.
The intermediate medium 6 is a heat conducting substance which can realize the interconversion between a gas state and a liquid state through temperature difference, the function of the intermediate medium 6 is mainly used for transferring heat back and forth, for example, the intermediate medium 6 can adopt ammonia, Freon-21 (CHCI2F) and the like.
An inlet connection flange 21 for connecting with a device for storing liquefied natural gas is provided on the inlet header pipe 2, and an outlet connection flange 31 for connecting with a device for storing gaseous natural gas is provided on the outlet header pipe 3
The working process is as follows:
the utility model provides a horizontal heat pipe liquefied natural gas vaporizer when using, according to the difference of medium, divide into two circulation structures:
the first is a water circulation structure:
circulating water with higher temperature in the heat source water enters the air shell 1 from the circulating water inlet 11, and the circulating water flows through each layer of circulating water channel formed between the supporting plate 14 and the layered partition plate 13 and flows out from the circulating water outlet 12.
The second is a circulation structure of liquefied natural gas:
liquefied natural gas enters the heat exchange inner tube 5 from the inlet header tube 2 through the inlet connecting flange 21, during the period, the lower part of the heat exchange outer tube 4 is heated by circulating water with higher temperature, heat is transferred to the intermediate medium 6, the intermediate medium 6 absorbs corresponding latent heat of gasification to evaporate, the latent heat of gasification is evaporated to the outer wall of the heat exchange inner tube 5, the liquefied natural gas exchanges heat with the natural gas 8 in the heat exchange inner tube 5, the latent heat of gasification is released and condensed into liquid, and the liquid flows back to the lower part in the heat exchange outer tube 4, and the process is repeated; and the liquid natural gas in the heat exchange inner pipe 5 is gasified into gas natural gas after absorbing heat, and flows out from the outlet connecting flange 31 through the outlet header pipe 3.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a horizontal heat pipe liquefied natural gas vaporizer, includes hollow casing (1), import header pipe (2) and export header pipe (3), and import header pipe (2) and export header pipe (3) are located both sides around hollow casing (1) respectively, have seted up circulating water import (11) and circulating water export (12) on both ends about hollow casing (1) respectively, its characterized in that: a layered partition plate (13) is arranged in the hollow shell (1), the layered partition plate (13) transversely divides a circulating water inlet (11) into a plurality of channels towards a circulating water outlet (12), a heat exchange tube is arranged in each channel, each heat exchange tube is fixed in the middle of each channel through a support plate (14), the support plates (14) divide the channels into a closed space and a water circulating channel from top to bottom, the closed space is positioned above the water circulating channel, and the lower parts of the heat exchange tubes are positioned in the water circulating channel; the heat exchange tube comprises a heat exchange outer tube (4) and a heat exchange inner tube (5), wherein the heat exchange outer tube (4) is a straight tube, the heat exchange inner tube (5) is eccentrically sleeved in the heat exchange outer tube (4) by the upper portion, the two ends of the heat exchange outer tube (4) are fixed on the heat exchange inner tube (5), a closed space is formed between the heat exchange outer tube (4) and the heat exchange inner tube (5), an intermediate medium (6) is filled in the closed space, the intermediate medium (6) is located below the heat exchange inner tube (5), the intermediate medium (6) is not in contact with the heat exchange inner tube (5), and the two ends of the heat exchange inner tube (5) are communicated with an inlet header tube (2) and an outlet header tube (3) respectively.
2. The horizontal heat pipe lng gasifier as claimed in claim 1, wherein: more than two heat exchange tubes are arranged in each layer side by side, and the heat exchange inner tubes (5) of every two adjacent heat exchange tubes are connected end to end through connecting elbows (7) to form a curved snake-shaped pipeline.
3. A horizontal heat pipe lng vaporizer as defined in claim 1 or 2, wherein: the intermediate medium (6) is a heat-conducting substance which can realize the interconversion between the gas state and the liquid state through the temperature difference.
4. A horizontal heat pipe lng vaporizer as defined in claim 3, wherein: an inlet connecting flange (21) and an outlet connecting flange (31) are respectively arranged on the inlet header pipe (2) and the outlet header pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570961.0A CN109506127B (en) | 2018-12-21 | 2018-12-21 | Horizontal heat pipe liquefied natural gas gasifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570961.0A CN109506127B (en) | 2018-12-21 | 2018-12-21 | Horizontal heat pipe liquefied natural gas gasifier |
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| Publication Number | Publication Date |
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| CN109506127A CN109506127A (en) | 2019-03-22 |
| CN109506127B true CN109506127B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811570961.0A Active CN109506127B (en) | 2018-12-21 | 2018-12-21 | Horizontal heat pipe liquefied natural gas gasifier |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486620A (en) * | 2019-09-17 | 2019-11-22 | 山西平朔煤矸石发电有限责任公司 | A kind of gravity-flow ventilation air-bathing gasifier preventing frosting for winter |
| CN111336833A (en) * | 2020-02-19 | 2020-06-26 | 无锡特莱姆气体设备有限公司 | Novel flow direction type stable gasifier |
| CN113587695A (en) * | 2021-08-12 | 2021-11-02 | 浙江大学 | Radial heat transfer micro-channel heat pipe |
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| JP2006010141A (en) * | 2004-06-24 | 2006-01-12 | Atomu Kenchiku Kankyo Kogaku Kenkyusho:Kk | Double tube type heat pipe |
| CN2762045Y (en) * | 2004-10-09 | 2006-03-01 | 陈兴元 | Bipipe eccentric heat siphon pipe heat exchanger |
| CN106705710A (en) * | 2016-12-14 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Heat exchanger |
| CN107014226A (en) * | 2017-04-18 | 2017-08-04 | 航天科工哈尔滨风华有限公司 | A kind of radial heat pipe formula liquified natural gas vaporizer |
| CN108895880A (en) * | 2018-08-23 | 2018-11-27 | 天津三电汽车空调有限公司 | A kind of flow dividing structure in automobile heat exchange unit header |
| CN110173904A (en) * | 2019-06-13 | 2019-08-27 | 无锡辉腾科技有限公司 | Heat pipe-type gasifier |
-
2018
- 2018-12-21 CN CN201811570961.0A patent/CN109506127B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006010141A (en) * | 2004-06-24 | 2006-01-12 | Atomu Kenchiku Kankyo Kogaku Kenkyusho:Kk | Double tube type heat pipe |
| CN2762045Y (en) * | 2004-10-09 | 2006-03-01 | 陈兴元 | Bipipe eccentric heat siphon pipe heat exchanger |
| CN106705710A (en) * | 2016-12-14 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Heat exchanger |
| CN107014226A (en) * | 2017-04-18 | 2017-08-04 | 航天科工哈尔滨风华有限公司 | A kind of radial heat pipe formula liquified natural gas vaporizer |
| CN108895880A (en) * | 2018-08-23 | 2018-11-27 | 天津三电汽车空调有限公司 | A kind of flow dividing structure in automobile heat exchange unit header |
| CN110173904A (en) * | 2019-06-13 | 2019-08-27 | 无锡辉腾科技有限公司 | Heat pipe-type gasifier |
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