CN202836303U - Three-dimension thin liquid membrane condensing tube - Google Patents
Three-dimension thin liquid membrane condensing tube Download PDFInfo
- Publication number
- CN202836303U CN202836303U CN 201220451850 CN201220451850U CN202836303U CN 202836303 U CN202836303 U CN 202836303U CN 201220451850 CN201220451850 CN 201220451850 CN 201220451850 U CN201220451850 U CN 201220451850U CN 202836303 U CN202836303 U CN 202836303U
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- indentations
- crescent
- impression
- thin liquid
- circumference
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Abstract
The utility model discloses a three-dimension thin liquid membrane condensing tube which comprises a pipe body. The three-dimension thin liquid membrane condensing tube is characterized in that multiple arrays of crescent indentations and long indentations are axially pressed at intervals on the circumference of the pipe body. Each array of crescent indentations comprises a plurality of crescent indentations circularly arranged on the circumference at intervals. Each array of long indentations comprises a plurality of long indentations circularly arranged on the circumference at intervals. The indentations are concave indentations on the outer surface of the pipe body and convex indentations on the inner surface of the pipe body. The three-dimension thin liquid membrane condensing tube is capable of not only slightly increasing a heat exchange area but also strengthening heat exchange of two sides of a condensing tube and improving the heat exchange coefficient, having a higher heat transfer enhancement property and enabling a thermal power plant to meet a higher requirement of the terminal temperature difference of a steam condenser.
Description
Technical field
The utility model relates to a kind of heat exchanger tube for water recovery device equipment in the fields such as thermal power plant.
Background technology
For the water recovery device in the fields such as power plant, the heat exchanger tube in it is the critical component that determines the heat exchange power.Under the identical condition such as caliber, pipe number, length, the heat exchange of heat exchanger tube is stronger, and then the end of condenser is poor less, and the coal consumption of unit generated energy is also fewer, reaches the effect of energy-saving and emission-reduction.Now mostly adopt plain tube to make heat exchanger tube with condenser.Have a small amount of thermal power plant to replace plain tube with enhanced heat exchange with bellows, spiral grooved tube etc. in technological transformation, although received certain effects of energy saving and emission reduction, their enhanced heat exchanges are desirable not enough, can't satisfy the higher requirement of heat transmission equipment.
The utility model content
For the progress trend of above-mentioned energy-saving and emission-reduction, the utility model provides a kind of three-dimensional thin liquid film condenser tube, and it has higher enhanced heat exchange performance, can satisfy the thermal power plant to the poor requirements at the higher level of steam condenser end.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of three-dimensional thin liquid film condenser tube comprises body, it is characterized in that: be suppressed with some crescent impression and microscler impressions that axially spaced-apart distributes that are listed on the described body circumference; Every row crescent impression is included on the circumference in the form of a ring, spaced several crescent impressions, the microscler impression of every row is included on the circumference in the form of a ring, spaced several microscler impressions, described impression all is indenture at outer surface of tube body, all is convex epirelief at inner surface of tube body.
As a kind of preferred, described every crescent impression is perpendicular to microscler impression.
During use, the outer water vapour of the cooling water in the pipe and pipe carries out heat exchange, forms liquid film at tube outer surface; Usefulness of the present utility model not only is slightly to have increased heat exchange area, the more important thing is the heat exchange of having strengthened the condenser tube bilateral: the crescent impression can significantly reduce the shaping size of film condensation, and the synergy of surface tension and groove makes the film condensation attenuation and causes cross-current; The turbulence of the convex epirelief meeting enhance fluid in the pipe and the equivalent diameter that reduces to flow, these have all improved the coefficient of heat transfer, have higher enhanced heat exchange performance, can satisfy the thermal power plant to the poor requirements at the higher level of steam condenser end.
Description of drawings
Fig. 1 is the schematic diagram of utility model.
Fig. 2 is the A-A profile.
Fig. 3 is the utility model longitudinal section.
Mark among the figure: 1 body, 2 crescent impressions, 3 microscler impressions.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement example, the utility model is further elaborated.Should be appreciated that implementation example described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As Figure 1-3: this three-dimensional thin liquid film condenser tube, comprise body 1, be suppressed with some crescent impression and microscler impressions that axially spaced-apart distributes that are listed on described body 1 circumference; Every row crescent impression is included on the circumference in the form of a ring, spaced several crescent impressions 2, the microscler impression of every row is included in and is fracture ring-type, spaced several microscler impressions 3 on the circumference, described impression 2 and 3 all is indenture at outer surface of tube body, all be convex epirelief at inner surface of tube body, every crescent impression 2 is perpendicular to microscler impression 3.
During use, the outer water vapour of the cooling water in the pipe and pipe carries out heat exchange, forms liquid film at tube outer surface; Every crescent impression 2 of compacting and microscler impression 3 not only are about and have increased heat exchange area on the body 1, the more important thing is the heat exchange of having strengthened the condenser tube bilateral:
1) strengthens steam side (shell-side) heat exchange
Condensation heat transfer formula on the horizontal tube is:
α=0.725[ρ
2gλ
3/μ/d/(t
s-t
w) ]
1/4 w/(㎡.℃)
It is original 1/5 that crescent impression 2 is reduced to the shaping size d of film condensation, and all in the constant situation, the condensation heat transfer coefficient of three-dimensional thin liquid film condenser tube is 5 of the former plain tube coefficient of heat transfer in all parameters
1/4 times, that is:
α
s/α=5
1/4=1.495
That is to say only reducing of falling film condensation shaping size, just make condensation heat transfer coefficient increase by 49.5%.
Simultaneously, the groove that crescent impression 2 and microscler impression 3 form, so that film condensation attenuation under capillary effect, and condensing wall somewhere coefficient of heat transfer formula is:
α
x=λ/δ
Thickness of liquid film δ attenuate in the formula, even only be thinned to originally 1/2, its condensation heat transfer coefficient also can double, and surface tension causes the lateral flow of liquid film, also can strengthen condensation heat transfer.
2) strengthen recirculated water side (pipe side) heat exchange:
Because the three-dimensional convex epirelief in the oriented pipe of wall of three-dimensional thin liquid film condenser tube has strengthened the near wall disturbance of fluid, attenuate thermal-boundary-leyer thickness, strengthened heat convection in the pipe; Because three-dimensional convex epirelief has reduced the equivalent diameter that flows, and 0.2 power of convection transfer rate and equivalent diameter is inversely proportional to, in the situation that other conditions are identical, equivalent diameter is less, and the coefficient of heat transfer is larger.
More than can find out, the utility model has improved the coefficient of heat transfer, has higher enhanced heat exchange performance, can satisfy the thermal power plant to the poor requirements at the higher level of steam condenser end.
The above only is better enforcement example of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. a three-dimensional thin liquid film condenser tube comprises body, it is characterized in that: be suppressed with some crescent impression and microscler impressions that axially spaced-apart distributes that are listed on the described body circumference; Every row crescent impression is included on the circumference in the form of a ring, spaced several crescent impressions, the microscler impression of every row is included in and is fracture ring-type, spaced several microscler impressions on the circumference, described impression all is indenture at outer surface of tube body, all is convex epirelief at inner surface of tube body.
2. three-dimensional thin liquid film condenser tube according to claim 1, it is characterized in that: described every crescent impression is perpendicular to microscler impression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451850 CN202836303U (en) | 2012-09-06 | 2012-09-06 | Three-dimension thin liquid membrane condensing tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451850 CN202836303U (en) | 2012-09-06 | 2012-09-06 | Three-dimension thin liquid membrane condensing tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202836303U true CN202836303U (en) | 2013-03-27 |
Family
ID=47947990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220451850 Expired - Fee Related CN202836303U (en) | 2012-09-06 | 2012-09-06 | Three-dimension thin liquid membrane condensing tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202836303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788526A (en) * | 2012-09-06 | 2012-11-21 | 四川惊雷压力容器制造有限责任公司 | Three-dimensional thin electrolyte film condenser tube |
-
2012
- 2012-09-06 CN CN 201220451850 patent/CN202836303U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788526A (en) * | 2012-09-06 | 2012-11-21 | 四川惊雷压力容器制造有限责任公司 | Three-dimensional thin electrolyte film condenser tube |
| WO2014036798A1 (en) * | 2012-09-06 | 2014-03-13 | 四川惊雷压力容器制造有限责任公司 | Three-dimension thin liquid membrane condensing tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20200906 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |