CN102889813A - Double-finned tube combined heat exchange component for high efficiency vaporizer - Google Patents

Double-finned tube combined heat exchange component for high efficiency vaporizer Download PDF

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Publication number
CN102889813A
CN102889813A CN2012104010817A CN201210401081A CN102889813A CN 102889813 A CN102889813 A CN 102889813A CN 2012104010817 A CN2012104010817 A CN 2012104010817A CN 201210401081 A CN201210401081 A CN 201210401081A CN 102889813 A CN102889813 A CN 102889813A
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CN
China
Prior art keywords
tube
heat exchange
fin
pipe
double
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CN2012104010817A
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Chinese (zh)
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CN102889813B (en
Inventor
陈永东
周兵
程沛
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合肥通用机械研究院
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Priority to CN201210401081.7A priority Critical patent/CN102889813B/en
Publication of CN102889813A publication Critical patent/CN102889813A/en
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Publication of CN102889813B publication Critical patent/CN102889813B/en

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Abstract

The invention discloses a double-finned tube combined heat exchange component for a high efficiency vaporizer, and is characterized by comprising an outer tube, an inner tube and a spiral turbulent flow rod, wherein the outer tube is vertically arranged; outer tube fins are axially arranged on the outer side wall of the side tube; the inner tube is sleeved in the outer tube; inner tube fins are axially arranged on the outer side wall of the inner tube; the inner tube is positioned at the lower half of the outer tube; the spiral turbulent flow rod is sleeved in the outer tube, positioned on the upper half of the outer tube, and connected at the top of the inner tube; and the section of the spiral turbulent flow rod is in cross shape. According to the double-finned tube combined heat exchange component for the high efficiency vaporizer, the possibility of outer tube freezing in the vaporization process of LNG (liquefied natural gas) is reduced, the turbulivity of flow field in the tube is increased; and the double-finned tube combined heat exchange component has the characteristics of high-efficient heat transfer, simple manufacturing, precise design, flexible installation and the like.

Description

The high-efficient gasification device makes up heat exchange element with the twin fin pipe
Technical field:
The present invention relates to a kind of LNG of being applicable to vaporizer high-performance heat transfer components, refer to that especially a kind of high-efficient gasification device makes up heat exchange element with the twin fin pipe.
Background technology
LNG vaporization refer to utilize vaporizer with the LNG vaporization of utmost point low temperature to the technology near normal temperature and output, the vaporising device of active service adopts open-frame type vaporizer as the main flow scheme mostly in the world.
Open-frame type vaporizer adopts the heat transfer unit pipe welding townhouse with special tectonic to form the heat exchanger plates bundle, and LNG enters the plate bundle by the bottom, enters each heat transfer unit pipe by collecting the distribution of distributor pipe even structure.Adopt seawater as thermal source, spray to heat exchanger plates bunchy top section by collecting the distributor pipe even structure, form falling liquid film at each heat transfer unit tube outer surface mobile, thereby the inner natural gas that upwards flows of heat transfer unit pipe is heated and reaches the purpose of final vaporization.
Open-frame type vaporizer in use, heat transfer unit pipe outer wall is near the lower end of gas inlet, because the LNG of very low temperature and pipe off-lying sea water direct heat-exchange in the pipe cause ocean temperature sharply to descend.When ocean temperature was lower than freezing point under the corresponding state, seawater just can freeze at heat transfer unit pipe outer wall, thereby affect the whole heat transfer property of heat exchanger tube, and then affect the complete machine running efficiency and the output quantity of vaporizing.
For avoiding the long-term erosion of seawater and corrosion, the heat transfer unit pipe is selected the property aluminum alloy materials, and carries out special sprayed surface at the heat-transfer pipe outer wall and process.
Along with the sharp increase of China LNG consumption figure and large import, the research of the LNG vaporization technology relative deficiency that seems.Special construction high-performance heat exchange unit pipe is one of core technology of open-frame type vaporizer.The whole dependence on import of open-frame type vaporizer of China have the vaporization heat exchanger tube now at present, and its heat transfer unit tube outer surface is irregular convex shape, and inside pipe wall adopts circumferentially uniform fine and closely woven inner fin.Such version can Effective Raise outer tube inside and outside wall heat transfer area, increased simultaneously the turbulivity of medium in the outer tube pipe.Because there is the difficulty of processing of certain degree in this structure, Mold Making is complicated, and existing mold can not satisfy the seamless extrusion manufacturing, because particular aluminum alloy processing one-shaping technique is still immature, has hindered it and has applied simultaneously.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, provide a kind of conduct heat efficient, make the high-efficient gasification device simple, that design is accurate, flexible for installation with twin fin pipe combination heat exchange element, suppress the heat exchange element bottom near the icing phenomenon of LNG porch.
The present invention is that the technical solution problem adopts following technical scheme:
High-efficient gasification device of the present invention makes up heat exchange element with the twin fin pipe, and its design feature is to arrange:
One outer tube is to erect and installs, and the outer tube fin is set on the lateral wall of described outer tube vertically;
One inner tube is sleeved in the described outer tube, and the inner tube fin is set on the lateral wall of described inner tube vertically, and described inner tube is in the lower semisection of described outer tube;
One helical form turbulator rod is sleeved in the described outer tube, is in the upper semisection of described outer tube and is undertaken on the top of described inner tube, and the cross section of described helical form turbulator rod is " ten " word.
High-efficient gasification device of the present invention makes up heat exchange element with the twin fin pipe, and its design feature also is:
The bottom of described inner tube is concordant with the bottom of outer tube, and described helical form turbulator rod is concordant with the top of described outer tube.
The height of described inner tube is half of outer tube height.
Described outer tube fin is concordant with described outer tube bottom, and highly more described outer length of tube is slightly short, and forms the conical surface of splaying on the top.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention is divided into whole heat exchange length near the vaporization section of bottom and the bringing-up section at close top by inner and outer tubes, in vaporization section, owing to there being the gap of inner tube and outer tube, so that the LNG in the gap is prior to the vaporization of inner tube inside, and then continue the LNG of heating inner tube inside as thermal source, such result has caused the raising of outer tube hull-skin temperature, establishment freezing of seawater.
2, the present invention just arranges turbulator rod on inner pipe, has effectively increased the flow turbulence degree of natural gas in the bringing-up section, has improved heat transfer efficiency.
3, the present invention makes simply, and manufacturing and maintenance cost are low;
4, among the present invention because inner tube diameter and fin height are easy to control, can be based on the Area Ratio of heat transfer model according to flow area in the operating condition design adjusting play circulation area size that adapts to the different disposal amount and interval area and the inner tube pipe, thus realize accurate design and the control of heat transfer;
When 5, adjacent outer tube soldering group is dressed up the heat transfer plate bundle among the present invention, only need the outer tube fin spot welding townhouse of Arbitrary Relative position is got final product.
Description of drawings
Fig. 1 is plan structure schematic diagram of the present invention;
Fig. 2 is vertical section of the present invention schematic diagram;
Number in the figure: 1 outer tube fin, 2 outer tubes, 3 turbulator rods, 4 inner tubes, 5 inner tube fins.
The specific embodiment
Referring to Fig. 2, Fig. 3, the high-efficient gasification device is to arrange with the version of twin fin pipe combination heat exchange element in the present embodiment:
One outer tube 2 is to erect and installs, and outer tube fin 1 is set on the lateral wall of outer tube 2 vertically;
One inner tube 4 is sleeved in the outer tube 2, and inner tube fin 5 is set on the lateral wall of inner tube 4 vertically, and inner tube 4 is in the lower semisection of outer tube 2;
One helical form turbulator rod 3 is sleeved in the outer tube 2, is in the upper semisection of outer tube 2 and is undertaken on the top of inner tube 4, and the cross section of helical form turbulator rod is " ten " word.
In the present embodiment, the bottom of inner tube is concordant with the bottom of outer tube, and the helical form turbulator rod is concordant with the top of outer tube, and the height of inner tube can be half of outer tube height, and the outer tube fin is concordant with the outer tube bottom; For the ease of the installation of follow-up spray equipment with improve sprayed sea water in the uniformity of outer tube 2 outer surface flow distribution, the outer length of tube of the height of outer tube fin is slightly short, and at the top formation conical surface of splaying.
LNG to be vaporized enters the gap of 4 of the inside of inner tube 4 and outer tube 2 and inner tubes, LNG in the gap is because directly with seawater to make heat exchange and prior to the vaporization of the LNG in the inner tube 2, then as the LNG in the thermal source heating inner tube 2, such result has caused the raising of outer tube hull-skin temperature, thereby has suppressed freezing of seawater.
Caliber and the fin height of inner tube depend on technology Calculation, can be based on the Area Ratio of heat transfer model according to flow area in the operating mode detailed design adjusting play circulation area size that adapts to the different disposal amount and interval area and inner tube 4 pipes, thus realize accurate design and the control of heat transfer.
The number of fins of outer tube can be taked circumferentially to be evenly arranged for 6 or 8, carries out the spot welding townhouse by the outer tube fin 1 with adjacent outer tube 2 relative positions and forms the plate bundle, and then be assembled into the vaporizer heat exchange module.
But all extrusion modlings of outer tube, inner tube and turbulator rod.

Claims (6)

1. the high-efficient gasification device makes up heat exchange element with the twin fin pipe, it is characterized in that arranging:
One outer tube is to erect and installs, and the outer tube fin is set on the lateral wall of described outer tube vertically;
One inner tube is sleeved in the described outer tube, and the inner tube fin is set on the lateral wall of described inner tube vertically, and described inner tube is in the lower semisection of described outer tube;
One helical form turbulator rod is sleeved in the described outer tube, is in the upper semisection of described outer tube and is undertaken on the top of described inner tube, and the cross section of described helical form turbulator rod is " ten " word.
2. high-efficient gasification device according to claim 1 makes up heat exchange element with the twin fin pipe, and it is characterized in that: the bottom of described inner tube is concordant with the bottom of outer tube, and described helical form turbulator rod is concordant with the top of described outer tube.
3. high-efficient gasification device according to claim 1 makes up heat exchange element with the twin fin pipe, and it is characterized in that: the height of described inner tube is half of outer tube height.
4. high-efficient gasification device according to claim 1 makes up heat exchange element with the twin fin pipe, it is characterized in that: described outer tube fin is concordant with described outer tube bottom, and highly more described outer length of tube is slightly short, and forms the conical surface of splaying on the top.
5. high-efficient gasification device according to claim 1 makes up heat exchange element with the twin fin pipe, and it is characterized in that: the number of fins of described outer tube can be 6 or 8, and employing circumferentially is evenly arranged.
6. high-efficient gasification device according to claim 1 makes up heat exchange element with the twin fin pipe, it is characterized in that: adjacent outer tube forms the plate bundle by the outer tube fin spot welding link on the relative position.
CN201210401081.7A 2012-10-19 2012-10-19 Double-finned tube combined heat exchange component for high efficiency vaporizer CN102889813B (en)

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CN201210401081.7A CN102889813B (en) 2012-10-19 2012-10-19 Double-finned tube combined heat exchange component for high efficiency vaporizer

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CN102889813A true CN102889813A (en) 2013-01-23
CN102889813B CN102889813B (en) 2014-09-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673714A (en) * 2013-12-27 2014-03-26 无锡佳龙换热器制造有限公司 Multi-level fluid radiating fin
CN103743278A (en) * 2014-01-16 2014-04-23 中国船舶重工集团公司第七二五研究所 Inner tube for open-frame vaporizer heat-exchange tube
CN105651104A (en) * 2016-01-04 2016-06-08 郑州轻工业学院 Anti-frosting LNG air-heated nanofluid heat exchange pipe
CN106197083A (en) * 2016-08-30 2016-12-07 中国海洋石油总公司 A kind of open-frame type gasifier heat exchanger tube
CN108302322A (en) * 2018-01-23 2018-07-20 北京东方通捷燃气有限责任公司 The combustion gas output channel of liquefied natural gas storage tank

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762639A1 (en) * 2005-09-13 2007-03-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Heat transfer tube for LNG vaporizer, its production method, and LNG vaporizer using such heat transfer tubes
CN201803621U (en) * 2010-09-30 2011-04-20 濮阳市联众兴业化工有限公司 Heat exchanger
CN201903280U (en) * 2010-12-21 2011-07-20 甘肃蓝科石化高新装备股份有限公司 Efficient star-shaped heat exchange tube for seawater open-frame type gasifier
CN202101591U (en) * 2011-05-24 2012-01-04 苏州新锐低温设备有限公司 Fin type heat exchange tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762639A1 (en) * 2005-09-13 2007-03-14 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Heat transfer tube for LNG vaporizer, its production method, and LNG vaporizer using such heat transfer tubes
CN201803621U (en) * 2010-09-30 2011-04-20 濮阳市联众兴业化工有限公司 Heat exchanger
CN201903280U (en) * 2010-12-21 2011-07-20 甘肃蓝科石化高新装备股份有限公司 Efficient star-shaped heat exchange tube for seawater open-frame type gasifier
CN202101591U (en) * 2011-05-24 2012-01-04 苏州新锐低温设备有限公司 Fin type heat exchange tube

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673714A (en) * 2013-12-27 2014-03-26 无锡佳龙换热器制造有限公司 Multi-level fluid radiating fin
CN103743278A (en) * 2014-01-16 2014-04-23 中国船舶重工集团公司第七二五研究所 Inner tube for open-frame vaporizer heat-exchange tube
CN103743278B (en) * 2014-01-16 2016-09-21 中国船舶重工集团公司第七二五研究所 A kind of inner tube for open-frame vaporizer heat-exchange tube
CN105651104A (en) * 2016-01-04 2016-06-08 郑州轻工业学院 Anti-frosting LNG air-heated nanofluid heat exchange pipe
CN105651104B (en) * 2016-01-04 2018-02-27 郑州轻工业学院 A kind of LNG air temperature type nano-fluid heat exchanger tubes of antifrost
CN106197083A (en) * 2016-08-30 2016-12-07 中国海洋石油总公司 A kind of open-frame type gasifier heat exchanger tube
CN108302322A (en) * 2018-01-23 2018-07-20 北京东方通捷燃气有限责任公司 The combustion gas output channel of liquefied natural gas storage tank

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