CN101029809A - Heat-exchanger of dual-spiral sprue curved baffle - Google Patents
Heat-exchanger of dual-spiral sprue curved baffle Download PDFInfo
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- CN101029809A CN101029809A CN 200710019860 CN200710019860A CN101029809A CN 101029809 A CN101029809 A CN 101029809A CN 200710019860 CN200710019860 CN 200710019860 CN 200710019860 A CN200710019860 A CN 200710019860A CN 101029809 A CN101029809 A CN 101029809A
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- heat exchanger
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Abstract
This invention is concerned about a kind of heat exchanging equipment, referred in particular to curved baffle board spiral heat exchanger with twin helix slow passage. This device is developed by modifying the current flat baffle board heat exchanger with twin helix slow passage into one with spiral baffle board. This construction can avoid the gap at the connection point between baffle boards and further prevent liquid leakage from the gap while flowing in the spiral flow passage and can thus increase the rate of heat exchange. No edges or corners and board obstruction exists in the flow passage with spiral curved board, and as a result, dead space of flow in the spiral flow passage can be eliminated. Besides, flow resistance caused by the friction between the liquid and the baffle board can be reduced by changing the flat board into a spiral curved one. Pressure loss and scaling on the side can be further reduced.
Description
Technical field
The present invention relates to a kind of heat-exchanging process equipment, refer in particular to a kind of dual-spiral sprue spiral camber baffle heat exchanger.
Background technology
Shell-and-tube heat exchanger is easy to make, and production cost is lower, and selection range is wide, and it is convenient to clean, and adaptability is strong, and capacity is big, reliable operation, and can adapt to HTHP.It uses in a lot of industrial circles in a large number, and especially in the employed heat transmission equipments of department such as oil, chemical industry and the energy, shell-and-tube heat exchanger still is in leading position.Conduct heat in order to strengthen shell side, do not make pipe oversize again, when the design heat exchanger tube, method commonly used is to utilize transverse baffle to carry out the branch journey.The deflection plate pattern mainly contains arc and helical baffles.The helical baffles shape can be divided into two kinds on plane and curved surface again.
Transverse baffle heat exchanger, fluid are Z-shaped at shell side and flow.Its shortcoming is that flow dead is big, easily fouling, and the coefficient of heat transfer is little; And flow pressure drop is big, and power consumption is high.
Other is Ceng Zhouhua, money panegyric etc. the research of shell-and-tube heat exchanger shell side segmental baffle heat transfer dead band fluid media (medium) trapping phenomena, refrigeration, 1995,52 (3): 10-14, segmental baffle board heat exchangers has been carried out numerical simulation, and surveyed, found that relative heat transfer dead band is 17% with coloured parenteral solution spectrophotometer.
And the heat exchanger of employing snail deflection plate joint form though partly solved the problem of flow dead, has improved the coefficient of heat transfer, reduces flow resistance, reduces the fouling of shell-side.But owing to adopting the surface plate overlap joint to form helical flow path, on the direction that the helical flow path fluid flows, there be stopping of plane deflection plate end face so on the one hand, increase step-down and fall, and in helical flow path, still have the part dead band to exist, influence the heat exchange effect; On the other hand, dull and stereotyped overlap joint can form bigger slit in lap-joint, when fluid flows in helical flow path, there is segment fluid flow from lap gap, to miss, cause the fraction fluid to flow, influence the heat exchange effect, increase flow resistance not according to the helical flow path direction.
Summary of the invention
In order to address the above problem, the present invention is designed to the spiral camber deflection plate with the plane deflection plate on the basis of overlap joint spiral baffle heat exchanger.Structurally can avoid the generation in the slit of deflection plate lap-joint, prevent that fluid from leaking in the slave plate seam, increases the coefficient of heat transfer in helical flow path.The runner that spiral curved surface constituted does not have corner angle, does not have stopping of plate end face yet, flow dead in the helical flow path that can thoroughly disappear.And make the plane deflection plate into the spiral camber deflection plate and can reduce flow resistance between fluid and the deflection plate, reduce pressure drop, further reduce the fouling of shell-side.
The technical scheme that realizes above-mentioned purpose is existing shell-and-tube heat exchanger, it is characterized in that being provided with the spiral camber deflection plate and be used to form helical flow path, it is made up of some semicircle spiral curved baffles, two deflection plates are connected to form 360 ° of helical rings, the tangent line of the external diameter helix of spiral camber deflection plate is called helical angle with the angle α on vertical heat exchanger tube axis plane, and helical angle is 9 °～40 °.
Advantage of the present invention:
(1) helical flow can produce the centrifugal force that acts on the fluid.At the change velocity attitude in following cycle of action of centrifugal force, thus vertical mixing of reinforcement fluid; In addition, washing away strongly of the secondary flow that produces of eddy flow not only can strengthen heat exchange but also less scaling.
(2) spiral flow and the stream of secondary radially superposition mutually strengthens turbulence intensity significantly, and makes turbulivity radial distribution homogenising, thereby strengthens heat exchange.
(3) mobile mobile along the helical baffles direction fully, there is not the dead band, increased the heat exchange area utilization rate, reduced flow pressure drop.
(4) the curved surface helical baffles uses, and has promptly guaranteed the deflection plate setting angle of low flow resistance, can realize that again the large contact surface of the long flow process of fine pitch is long-pending.Obtain augmentation of heat transfer, reduced the effect of flow resistance.
(5) deflection plate adopts the spiral camber form, and the slit that can avoid dull and stereotyped overlap joint to form prevents that fluid from leaking, and further increases the coefficient of heat transfer.
(6) replace the plane deflection plate with curved baffle, reduced the flow resistance between fluid and the deflection plate, reduce pressure drop, further reduce the scaling tendency of shell-side.
(7) the present invention has or not situation such as phase transformation all to be suitable for for low viscosity fluid, high viscosity fluid and fluid, and especially for high viscosity fluid, one or both sides are the heat exchanger of Laminar Flow state, and effect is more outstanding.
Compare with the plane baffle heat exchanger, can improve the shell side coefficient of heat transfer 20～30%, reduce pressure drop 40～50%, less scaling, can prolong the time between overhauls(TBO) 120%.
Description of drawings
Fig. 1 is the 3 d effect graph (main looking) of dual-spiral sprue spiral camber deflection plate string of the present invention.
Fig. 2 is the 3 d effect graph (overlooking) of dual-spiral sprue spiral camber deflection plate string of the present invention.
1. heat exchanger tube; 2. spiral camber deflection plate; 3. distance sink tube;
The specific embodiment
As shown in Figure 1, dual-spiral sprue is made up of some semicircle spiral curved baffles 2, and two deflection plates are connected to form 360 ° of helical rings.The tangent line of the external diameter helix of spiral camber deflection plate 2 becomes certain inclined angle alpha with the plane of vertical heat exchanger tube 1, is called helical angle.The size of helical angle is determined by medium and heat-exchanging process, generally between 9 °-40 °.Between the helical ring of front and back distance sink tube 3 is arranged, distance sink tube is used for fixing the axial distance between the helical ring.
During manufacturing, at first determine helical angle according to heat-exchanging process, design semicircle spiral curved baffle by helical angle, blanking is stand-by.By calculating the distance of determining between helical ring.Two deflection plates are installed successively along the hand of spiral before and after during installation, fix by distance sink tube between two deflection plates, promptly form helical flow path.
Claims (1)
1. dual-spiral sprue spiral camber baffle heat exchanger, it is characterized in that being provided with the spiral camber deflection plate and be used to form dual-spiral sprue, it is made up of some semicircle spiral curved baffles, two deflection plates are connected to form 360 ° of helical rings, and the tangent line of the external diameter helix of spiral camber deflection plate and the angle on vertical heat exchanger tube axis plane are 9 °～40 ° helical angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710019860 CN101029809A (en) | 2007-02-01 | 2007-02-01 | Heat-exchanger of dual-spiral sprue curved baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710019860 CN101029809A (en) | 2007-02-01 | 2007-02-01 | Heat-exchanger of dual-spiral sprue curved baffle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101029809A true CN101029809A (en) | 2007-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710019860 Pending CN101029809A (en) | 2007-02-01 | 2007-02-01 | Heat-exchanger of dual-spiral sprue curved baffle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101029809A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115196974A (en) * | 2022-07-11 | 2022-10-18 | 上海科技大学 | Heat exchange structure based on variable-period minimum curved surface, heat exchanger and manufacturing method |
-
2007
- 2007-02-01 CN CN 200710019860 patent/CN101029809A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115196974A (en) * | 2022-07-11 | 2022-10-18 | 上海科技大学 | Heat exchange structure based on variable-period minimum curved surface, heat exchanger and manufacturing method |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |