CN204240841U - A kind of spiral baffle heat exchanger - Google Patents
A kind of spiral baffle heat exchanger Download PDFInfo
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- CN204240841U CN204240841U CN201420544529.5U CN201420544529U CN204240841U CN 204240841 U CN204240841 U CN 204240841U CN 201420544529 U CN201420544529 U CN 201420544529U CN 204240841 U CN204240841 U CN 204240841U
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Abstract
The utility model relates to a kind of spiral baffle heat exchanger, comprises housing, left tube sheet, right tube plate, central tube, helical baffles, heat exchanger tube, pull bar and distance sink tube; Described helical baffles, heat exchanger tube, pull bar and distance sink tube are located in housing, and central tube is located at the center of housing, and the two ends of described housing are connected with left tube sheet and right tube plate respectively; Described helical baffles is the double helix shape that the elliptic sector plate tilting to install around central tube is spliced into, and its helical angle is 8 °-45 °, and the center of described elliptic sector plate is arranged on central tube.The utility model improves the shell side coefficient of heat transfer greatly: by adopting Novel double-helix baffle arrangement, effectively improving shell side flow velocity, strengthening the flow disturbance of the peripheral near wall region of tube bank simultaneously, improve the shell side coefficient of heat transfer greatly.
Description
Technical field
The utility model relates to a kind of heat exchanger for industrial circles such as chemical industry, petrochemical industry, power, medicine, metallurgy, refrigeration, light industry, desalinizations, is specifically related to a kind of spiral baffle heat exchanger.
Background technology
Heat exchanger is a kind of common apparatus being widely used in the industrial circles such as chemical industry, petrochemical industry, power, medicine, metallurgy, refrigeration, light industry, desalinization.Heat exchanger has been used to the equipment of various different heat transfer process, in the eurypalynous heat exchanger structure of crowd, shell-and-tube heat exchanger because structure is simple, heat-transfer effect better, the feature such as the ripe and strong adaptability of design processing technology and become with the most a kind of heat transmission equipment type, wherein adopt segmental baffle supporting construction in the majority with shell side again.
In traditional segmental baffle board heat exchangers, the effect of segmental baffle is the zigzag flowing making shell-side flow become bending, and fluid vertically can wash away tube bank, enhanced heat exchange.But the arrangement form of this deflection plate also brings a lot of problem simultaneously, as segmental baffle makes fluid orthogonal impact shell wall side, cause larger along journey pressure drop; Deflection plate and shell wall side joint produce stagnation dead band of flowing, and reduce heat exchange efficiency; The fluid of high-quality flow velocity is horizontal plunders heat-exchanging tube bundle, can induce the vibration of heat exchanger tube, shortens the life-span of heat exchanger.
And spiral baffle heat exchanger is that arrangement of baffles is become approximate helicoid, the shell fluid in heat exchanger is made to realize continuous print helical flow, to realize effectively reducing the flow resistance of shell-side and the object of augmentation of heat transfer.Recent research shows, the helical baffles of spiral baffle heat exchanger makes fluid be the flowing of continuous cylindrical helical at shell-side, there will not be the flowing " dead band " in traditional baffle heat exchanger, and the whirlpool produced due to eddy flow and tube bank heat transfer interface boundary layer interaction, turbulivity is increased considerably, not only avoid the problem that segmental baffle brings, and helical baffles also substantially increases the film heat transfer coefficient of shell side, reduce the pressure drop of shell-side, alleviate the vibration problem of heat exchanger simultaneously.
From structure and combination property, overcome when traditional segmental baffle supports tube bank that resistance is large, dead angle is many with spiral baffle supporting tube bank, easy incrustation, easily bring out the defects such as tube bundle vibration; From enhanced heat transfer mechanism, while helical flow makes bodies of fluid present axial flow, also produce the flowing that rotates in a circumferential direction, the superposition of two kinds of flowings can produce continuously eddy current, under the impact of centrifugal action, mainstream fluid is fully mixed with tube wall boundary layer fluid, is thinned fluid boundary layer, thus reach the object of augmentation of heat transfer.But in existing spiral baffle heat exchanger, spiral baffle heat exchanger shell side trigonum still can leakage current, and the shell side coefficient of heat transfer of spiral baffle heat exchanger is still not ideal, and dirt still can deposit.
Utility model content
The utility model is for Problems existing in current spiral baffle heat exchanger, a kind of spiral baffle heat exchanger is provided, improve the flow regime of spiral baffle heat exchanger shell side trigonum leakage current and deflection plate leeward side, improve the shell side coefficient of heat transfer of spiral baffle heat exchanger, slow down dirt deposition, ensure equipment long-term operation.
Concrete technical scheme of the present utility model is as follows:
A kind of spiral baffle heat exchanger, comprises housing, left tube sheet, right tube plate, central tube, helical baffles, heat exchanger tube, pull bar and distance sink tube; Described helical baffles, heat exchanger tube, pull bar and distance sink tube are located in housing, and central tube is located at the center of housing, and the two ends of described housing are connected with left tube sheet and right tube plate respectively; It is characterized in that described helical baffles is the double helix shape that the elliptic sector plate tilting to install around central tube is spliced into, its helical angle is 8 °-45 °, and the center of described elliptic sector plate is arranged on central tube.
The quantity of the elliptic sector plate of a pitch of a described helical baffles helix is 4.
For the ease of location and the installation of helical baffles, effectively strengthen the disturbance of near wall region fluid, improve heat exchange property; A pitch of a described helix is provided with 2 annular retaining rings, and described annular retaining ring is connected to the periphery of helical baffles.
For the ease of location and the installation of helical baffles, effectively strengthen the disturbance of near wall region fluid, improve heat exchange property; Described inner walls is provided with 2-4 baffle plate, is evenly distributed on inner walls circumferentially.
Described elliptic sector plate is that 1/4 elliptic sector is dull and stereotyped, and it is projected as 1/4 circle on shell side cross section.
Heat exchanger structure described in the utility model can adopt the one in fixed tube sheet type, floating head type, U-shaped tubular type.
The utility model compared with prior art tool has the following advantages:
(1) the utility model improves the shell side coefficient of heat transfer greatly: by adopting Novel double-helix baffle arrangement, effectively improving shell side flow velocity, strengthening the flow disturbance of the peripheral near wall region of tube bank simultaneously, improve the shell side coefficient of heat transfer greatly.
(2) the utility model improves shell side Flow Field Distribution: by cooperatively interacting between two spirals, effectively improves the flow regime of trigonum leakage current and deflection plate leeward side, makes fluid more reasonable in interbank distribution.Fluid is along in deflection plate perficial helical flow process, and trigonum, segment fluid flow Hui Cong center and outer rim overlap enter another helical duct.Because swirling motion produces centrifugal force, make the flow of overlap larger.Bridging arrangement makes central cam district flow velocity reduce, and alleviate central cam district leakage current phenomenon, and the flowing of outer rim overlap can improve the leeward side air-teturning mixed phenomenon of deflection plate.Through the fluid of central cam district and outer rim overlap after entering another helical duct, be just in time subject to the deflection plate guide functions of another spiral, make it helically flow together with the fluid junction in this helical duct.Repeatedly occur being separated and converging with this shell-side fluid, accelerate the mixing between fluid, substantially eliminate flow dead, dirt not easily deposits, and ensures equipment long-term operation.
(3) double helix baffle arrangement of the present utility model can reduce tube bundle support spacing, is conducive to avoiding tube bundle vibration to destroy, and is particularly useful for the occasion that helical angle is comparatively large and size of heat exchanger is larger.
Accompanying drawing explanation
Fig. 1 is the structural representation of spiral baffle heat exchanger described in the utility model.
Detailed description of the invention
The utility model is further illustrated below in conjunction with accompanying drawing.
See Fig. 1, a kind of spiral baffle heat exchanger, comprises housing 2, left tube sheet 1, right tube plate 9, central tube 8, helical baffles 3, heat exchanger tube 6, pull bar and distance sink tube 7; Other parts are identical with traditional shell-and-tube heat exchanger.Heat exchanger structure can be fixed tube sheet type, floating head type, U-shaped tubular type etc.
Helical baffles 3, heat exchanger tube 6, pull bar and distance sink tube 7 are located in housing 2, pull bar and distance sink tube play deflection plate positioning action, distance sink tube is through on pull bar, and one end of pull bar is by being screwed on tube sheet, and the other end and the distance sink tube tail end of pull bar are bolted; Central tube 8 is located at the center of housing 2, and the two ends of housing 2 are connected with left tube sheet 1 and right tube plate 9 respectively; Heat exchanger tube 6 is fixed on left tube sheet 1 and right tube plate 9 by welding or expanded joint through after helical baffles 3.
Helical baffles 3 is the double helix shape that the elliptic sector plate tilting to install around central tube 8 is spliced into, and its helical angle is 8 °-45 °, and the center of elliptic sector plate arranges C and is arranged on central tube.The quantity of the elliptic sector plate of a pitch of a helical baffles helix is 4; Elliptic sector plate is that 1/4 elliptic sector is dull and stereotyped, and it is projected as 1/4 circle on shell side cross section.Article one, a pitch of helix is provided with 2 annular retaining rings 5, and annular retaining ring 5 is by being fixedly welded on the periphery of helical baffles 3.Housing 2 inwall is also provided with 2-4 baffle plate 4, and baffle plate 4 is evenly distributed on housing 2 inwall circumferentially.
During work, medium is entered by shell side inlet A, under the guide functions of helical baffles 3, forms the flowing of approximate helical shape.Fluid is along in deflection plate perficial helical flow process, and trigonum, segment fluid flow Hui Cong center and outer rim overlap enter another helical duct; Because swirling motion produces centrifugal force, make the flow of overlap larger.Bridging arrangement makes central cam district flow velocity reduce, and alleviate central cam district leakage current phenomenon, and the flowing of outer rim overlap can improve the leeward side air-teturning mixed phenomenon of deflection plate.Through the fluid of central cam district and outer rim overlap after entering another helical duct, be just in time subject to the deflection plate guide functions of another spiral, make it helically flow together with the fluid junction in this helical duct.Repeatedly occur being separated and converging with this shell-side fluid, accelerate the mixing between fluid, installation by-pass damper 4 and annular retaining ring 5 effectively can strengthen the disturbance of near wall region fluid, improve heat exchange property.
Claims (5)
1. a spiral baffle heat exchanger, comprises housing, left tube sheet, right tube plate, central tube, helical baffles, heat exchanger tube, pull bar and distance sink tube; Described helical baffles, heat exchanger tube, pull bar and distance sink tube are located in housing, and central tube is located at the center of housing, and the two ends of described housing are connected with left tube sheet and right tube plate respectively; It is characterized in that described helical baffles is the double helix shape that the elliptic sector plate tilting to install around central tube is spliced into, its helical angle is 8 °-45 °, and the center of described elliptic sector plate is arranged on central tube.
2. spiral baffle heat exchanger according to claim 1, is characterized in that the quantity of the elliptic sector plate of a pitch of a described helical baffles helix is 4.
3. spiral baffle heat exchanger according to claim 2, it is characterized in that a pitch of a described helix is provided with 2 annular retaining rings, described annular retaining ring is connected to the periphery of helical baffles.
4. the spiral baffle heat exchanger according to any one of claims 1 to 3, is characterized in that described inner walls is provided with 2-4 baffle plate, is evenly distributed on inner walls circumferentially.
5. the spiral baffle heat exchanger according to any one of claims 1 to 3, is characterized in that described elliptic sector plate is that 1/4 elliptic sector is dull and stereotyped, and it is projected as 1/4 circle on shell side cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544529.5U CN204240841U (en) | 2014-09-22 | 2014-09-22 | A kind of spiral baffle heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420544529.5U CN204240841U (en) | 2014-09-22 | 2014-09-22 | A kind of spiral baffle heat exchanger |
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| CN204240841U true CN204240841U (en) | 2015-04-01 |
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| CN201420544529.5U Active CN204240841U (en) | 2014-09-22 | 2014-09-22 | A kind of spiral baffle heat exchanger |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043141A (en) * | 2015-06-10 | 2015-11-11 | 大连东方亿鹏设备制造有限公司 | Large double-helix baffle type heat exchanger |
| CN105202952A (en) * | 2015-10-11 | 2015-12-30 | 中国石油化工股份有限公司 | Double-helix baffle plate heat exchanger |
| CN105910486A (en) * | 2016-04-15 | 2016-08-31 | 东南大学 | Multi-head six-part spiral baffle plate heat exchanger baffle plate support structure |
| CN105910462A (en) * | 2016-04-15 | 2016-08-31 | 东南大学 | Baffle plate support method using small inclination angle helical baffle plate to realize large helical lead |
| CN108779397A (en) * | 2016-02-05 | 2018-11-09 | 考克利尔维修工程 | The multi rack stove used under low temperature |
-
2014
- 2014-09-22 CN CN201420544529.5U patent/CN204240841U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043141A (en) * | 2015-06-10 | 2015-11-11 | 大连东方亿鹏设备制造有限公司 | Large double-helix baffle type heat exchanger |
| CN105202952A (en) * | 2015-10-11 | 2015-12-30 | 中国石油化工股份有限公司 | Double-helix baffle plate heat exchanger |
| CN108779397A (en) * | 2016-02-05 | 2018-11-09 | 考克利尔维修工程 | The multi rack stove used under low temperature |
| CN108779397B (en) * | 2016-02-05 | 2020-10-23 | 考克利尔维修工程 | Multi-frame furnace used at low temperature |
| CN105910486A (en) * | 2016-04-15 | 2016-08-31 | 东南大学 | Multi-head six-part spiral baffle plate heat exchanger baffle plate support structure |
| CN105910462A (en) * | 2016-04-15 | 2016-08-31 | 东南大学 | Baffle plate support method using small inclination angle helical baffle plate to realize large helical lead |
| CN105910486B (en) * | 2016-04-15 | 2018-03-20 | 东南大学 | A kind of bull six divides the baffle plate support structure of spiral baffle heat exchanger |
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