CN201867119U - Heat exchanger with helical flow baffle - Google Patents
Heat exchanger with helical flow baffle Download PDFInfo
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- CN201867119U CN201867119U CN2010202940396U CN201020294039U CN201867119U CN 201867119 U CN201867119 U CN 201867119U CN 2010202940396 U CN2010202940396 U CN 2010202940396U CN 201020294039 U CN201020294039 U CN 201020294039U CN 201867119 U CN201867119 U CN 201867119U
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- helical
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Abstract
The utility model relates to a heat exchanger with a helical flow baffle, which comprises a tube plate, a shell body, a ring baffle arranged in the shell body, a heat exchange tube bundle and the helical flow baffle. The heat exchange tube bundle passes through the helical flow baffle and is fixed on the tube plate. The helical flow baffle is continuous; from one end of the helical flow baffle to the central position of the shell body, the projection radius r of the helical curved surface of the helical flow baffle is gradually decreased and is decreased to the minimum value at the central position of the shell body. Meanwhile, the ring baffle is arranged at the internal side of the shell wall at the position of the cross section of the center of the shell body. A fluid which flows by a shell pass carries out helical changing motion in a helical channel; when the fluid flows to the position of the ring baffle in the center of the shell body, vena contracta flow with the Venturi effect is formed and the fluid can regain high flowing speed at the position. High-speed helical flow can increase the turbulence intensity of the fluid in the shell body of the heat exchanger to significantly increase heat transfer coefficients of the shell pass, thereby achieving the purpose of enhancing heat transfer.
Description
Technical field
The utility model relates to a kind of shell-and-tube heat transmission equipment, particularly a kind of spiral baffle heat exchanger.
Background technology
Heat exchanger is a kind of interchangeable heat switching equipment that is widely used in fields such as oil, chemical industry, metallurgy, the energy.In the heat exchanger of numerous forms, shell-and-tube heat exchanger is be most widely used a kind of.And present employed shell-and-tube heat exchanger adopts the segmental baffle structure more, and promptly the liquid form of shell-side fluid is " Z " font stream of turning back.There is the stagnation region that flows in this liquid form near deflection plate and shell wall joint, cause this district's coefficient of heat transfer low, and easy incrustation; Simultaneously, turning back is flowing in baffle gap edge flow separation can take place, and it is excessive to cause shell side pressure to be fallen, and fluid transversal flow tube bank between two deflection plates, also causes the heat exchanger tube vibration easily, reduces the service life of heat exchanger.
People have developed some novel pipe shell type heat exchangers in recent years, wherein, spiral baffle heat exchanger becomes helicoid to arrangement of baffles, make in the heat exchanger shell fluid in the shape of a spiral shape flow, to realize reducing effectively the flow resistance of shell-side and the purpose of augmentation of heat transfer.Existing spiral baffle heat exchanger has two classes, one class is to adopt two or polylith is fan-shaped, elliptical plate is formed approximate spiral camber discontinuous spiral baffle heat exchanger, is 200810195216.2 Chinese patent as the application number of announcing on April 8th, 2009; Another kind of is the continuous helical deflecting plate heat exchanger that adopts the continuous helical curved surface, is 200710017478.5 Chinese patent as the application number of announcing on August 22nd, 2007.For discontinuous helical baffles, continuous helical deflecting plate makes and flows more near screw type, can further reduce resistance and leakage current.Flow near vertical plug flow, effectively reduce flow dead, reduced the vibration and the flow pressure drop of pipe, improved heat exchange efficiency, be applied in many occasions such as chemical oil refining at present widely.
Yet, when fluid is flowing near spiral baffle heat exchanger shell inner surface position, owing to deviation is arranged with desirable screw, Utopian VELOCITY DISTRIBUTION does not appear, in addition, because flow velocity is corresponding lower herein, there is slow flow region, so heat-transfer effect is undesirable.And be the key position of spiral baffle heat exchanger augmentation of heat transfer near the shell inner surface position, heat-transfer pipe radical herein is more, shared heat exchange area large percentage, near flow field velocity should the nearly shell side inwall of strengthening fluid or less turbulence are so that further augmentation of heat transfer.Therefore, be necessary when shell-side fluid is spinned motion, change macroscopical flow field to reach the purpose of strengthening the Hydrodynamic turbulence degree thereby mix a kind of flowing of other.
Summary of the invention
The purpose of this utility model is to provide a kind of housing the middle spiral baffle heat exchanger that has ring baffle.It can improve the flow condition of shell-side fluid, strengthens the less turbulence of fluid, thereby improves the shell side heat transfer coefficient.
The technical solution adopted in the utility model is:
A kind of spiral baffle heat exchanger, comprise tube sheet, ring baffle in housing and the housing, heat-exchanging tube bundle and helical baffles, heat-exchanging tube bundle passes helical baffles and is fixed on the tube sheet, and deflection plate is a continuous helical deflecting plate, it is characterized in that: helical baffles begins to the housing center from the one end, the projection radius of circle r of its spiral camber successively decreases gradually, reduces to minimum r in the housing center
Min, the housing radius is R, the shell wall inboard at housing center cross-sectional place is provided with a ring baffle, this baffle plate outer shroud radius r
1=R, interior ring radius r
2=r
Min, helical baffles is axle with the ring baffle, the projection radius of circle r of both sides spiral camber and helical angle Φ are symmetrically distributed.
Described spiral baffle heat exchanger, 0.1R＜r≤R, 0.1R＜r
Min＜r.
Described helical baffles can be equidistant spiral or variable-pitch propeller.
Described spiral baffle heat exchanger, helical angle Φ span: 5 °≤Φ≤50 °.
Described continuous helical can also can be right-handed helix for left hand helix.
Described spiral baffle heat exchanger, when described helical baffles was variable-pitch propeller, helical angle became successively greatly by direction of flow or diminishes successively or interlace conversion.
Spiral baffle heat exchanger described in the utility model, fluid in the housing is done the modified line screw in the helical duct that changes, when fluid is flowed through housing center annular baffle position place, form the vena contracta stream of one class Venturi effect, fluid regains higher flow velocity herein, high-speed screw stream can improve the turbulence intensity of fluid in heat exchanger shell, significantly improves the shell side heat transfer coefficient, thereby reaches the purpose of augmentation of heat transfer.
The beneficial effects of the utility model:
(1) the shell side heat transfer coefficient significantly improves.The utility model has been introduced vena contracta stream and modified line spiral flow, strengthens the housing center effectively and mixes with near the convection current of the fluid of shell wall side, has improved the flow regime of fluid, and the Hydrodynamic turbulence degree improves, and has improved the heat transfer coefficient of shell side greatly.
(2) can effectively prevent vibration damage, help the maximization of equipment.Because continuous spiral supports, and has reduced the tube bank span, has improved the intrinsic frequency of pipe, avoided the excited frequency of fluid, thereby eliminated the possibility that produces resonance, the destruction of having avoided vibration to cause, prolong equipment service life, reduced the maintenance of equipment expense.
(3) can reduce dirt deposition.The modified line spiral vena contracta stream that runs up helps to reduce the dirt deposition on shell wall and the deflection plate, prolongs the cleaning frequency, reduces maintenance accordingly, cleaning charge usefulness.Heat exchanger is moved at concert pitch, reach energy-conservation purpose.
Description of drawings
Fig. 1 looks the datum level cross-sectional view for the utility model spiral baffle heat exchanger right side.
Fig. 2 is the utility model spiral baffle heat exchanger internal structure schematic diagram.
Fig. 3 is the utility model spiral baffle heat exchanger internal helicoid baffle arrangement schematic diagram.
Fig. 4 is the utility model spiral baffle heat exchanger internal helicoid deflection plate left side TV structure schematic diagram.
Specific embodiments
Below in conjunction with embodiment and accompanying drawing the utility model is described in further details, but the claimed scope of the utility model is not limited to the scope that embodiment represents.
As shown in Figure 1, a kind of novel spiral baffle heat exchanger comprises tube sheet 1, ring baffle 3, heat-exchanging tube bundle 4 and helical baffles 5 in housing 2 and the housing.Heat-exchanging tube bundle 4 is made up of many heat exchanger tubes, and Fig. 1 only draws representational several.Helical baffles 5 is a continuous helical deflecting plate, and heat-exchanging tube bundle 4 passes helical baffles 5 and is fixed on the tube sheet 1.Helical baffles 5 is equidistant layout.As shown in Figure 4, helical angle is Φ=10 ° in the present embodiment, and the housing radius is R, and helical baffles 5 begins to housing 2 centers from the one end, and the projection radius of circle r of its spiral camber successively decreases gradually, reduces to minimum r in the housing center
Min=0.5R.As shown in Figure 3, in the shell wall inboard at housing 2 center cross-sectional places one ring baffle 3 is set, in the both sides of ring baffle 3, the projection radius of circle r of the spiral camber of helical baffles 5 and helical angle Φ are symmetrically distributed.Fluid carries out heat exchange with heat-exchanging tube bundle 4 in housing.The fluid motion of in housing, spinning, when fluid is flowed through housing center annular baffle plate 3 positions, form the vena contracta stream of one class Venturi effect, fluid regains higher flow velocity herein, high-speed screw stream can improve the turbulence intensity of fluid in heat exchanger shell, significantly improves the shell side heat transfer coefficient.
As different from Example 1, the helical baffles 5 of present embodiment is variable-pitch propeller and arranges that helical angle Φ is respectively 5 ° by direction of flow, and 7 °, 10 °, 15 ° and 15 °, 10 °, 7 °, 5 °.Variable-pitch propeller is arranged the macroscopical flow regime that can further optimize fluid, eliminates stable equidistant spiral flow, helps to improve the convective heat-transfer coefficient of shell-side fluid and heat exchanger tube outer wall; Simultaneously, variable-pitch propeller flows and can avoid tube bank to form single frequency of oscillation, reduces the possibility that heat-exchanging tube bundle produces resonance.
Claims (6)
1. spiral baffle heat exchanger, comprise tube sheet, ring baffle in housing and the housing, heat-exchanging tube bundle and helical baffles, heat-exchanging tube bundle passes helical baffles and is fixed on the tube sheet, and deflection plate is a continuous helical deflecting plate, it is characterized in that: helical baffles begins to the housing center from the one end, the projection radius of circle r of its spiral camber successively decreases gradually, reduces to minimum r in the housing center
Min, the housing radius is R, the shell wall inboard at housing center cross-sectional place is provided with a ring baffle, this baffle plate outer shroud radius r
1=R, interior ring radius r
2=r
Min, helical baffles is axle with the ring baffle, the projection radius of circle r of both sides spiral camber and helical angle Φ are symmetrically distributed.
2. spiral baffle heat exchanger as claimed in claim 1 is characterized in that, 0.1R＜r≤R, 0.1R＜r
Min＜r.
3. spiral baffle heat exchanger as claimed in claim 1 is characterized in that, described helical baffles can be equidistant spiral or variable-pitch propeller.
4. spiral baffle heat exchanger as claimed in claim 1 is characterized in that, described helical angle Φ span: 5 °≤Φ≤50 °.
5. spiral baffle heat exchanger as claimed in claim 1 is characterized in that, described continuous spiral can also can be right-handed helix for left hand helix.
6. spiral baffle heat exchanger as claimed in claim 3 is characterized in that, when described helical baffles was variable-pitch propeller, the helical baffles helical angle became successively greatly by direction of flow or diminishes successively or interlace conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202940396U CN201867119U (en) | 2010-08-17 | 2010-08-17 | Heat exchanger with helical flow baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202940396U CN201867119U (en) | 2010-08-17 | 2010-08-17 | Heat exchanger with helical flow baffle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201867119U true CN201867119U (en) | 2011-06-15 |
Family
ID=44138271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202940396U Expired - Fee Related CN201867119U (en) | 2010-08-17 | 2010-08-17 | Heat exchanger with helical flow baffle |
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|---|---|
| CN (1) | CN201867119U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331079A (en) * | 2011-07-20 | 2012-01-25 | 江苏瑞吉格泰油气工程有限公司 | Electric heating device for high-corrosion medium |
| CN102967161A (en) * | 2012-12-12 | 2013-03-13 | 沈阳东方钛业有限公司 | HC1 gas indirect heater |
| CN109776376A (en) * | 2019-03-15 | 2019-05-21 | 湘潭大学 | Device and synthetic method of the continuous synthesis bromo- 2- of 4- to chloro- 5- trifluoromethyl pyrpole -3- nitrile |
| CN110530175A (en) * | 2019-07-22 | 2019-12-03 | 浙江科技学院 | A kind of oblique stream spiral baffle heat exchanger of ladder |
| CN112146477A (en) * | 2020-09-07 | 2020-12-29 | 西安交通大学 | Efficient spiral baffle plate shell-and-tube heat exchanger and heat exchange method |
| CN112361851A (en) * | 2020-10-28 | 2021-02-12 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Printed circuit board heat exchanger |
-
2010
- 2010-08-17 CN CN2010202940396U patent/CN201867119U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331079A (en) * | 2011-07-20 | 2012-01-25 | 江苏瑞吉格泰油气工程有限公司 | Electric heating device for high-corrosion medium |
| CN102967161A (en) * | 2012-12-12 | 2013-03-13 | 沈阳东方钛业有限公司 | HC1 gas indirect heater |
| CN109776376A (en) * | 2019-03-15 | 2019-05-21 | 湘潭大学 | Device and synthetic method of the continuous synthesis bromo- 2- of 4- to chloro- 5- trifluoromethyl pyrpole -3- nitrile |
| CN110530175A (en) * | 2019-07-22 | 2019-12-03 | 浙江科技学院 | A kind of oblique stream spiral baffle heat exchanger of ladder |
| CN112146477A (en) * | 2020-09-07 | 2020-12-29 | 西安交通大学 | Efficient spiral baffle plate shell-and-tube heat exchanger and heat exchange method |
| CN112361851A (en) * | 2020-10-28 | 2021-02-12 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Printed circuit board heat exchanger |
| CN112361851B (en) * | 2020-10-28 | 2022-05-17 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Printed circuit board heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20120817 |