CN214840735U - Venturi enamel heat exchanger for boiler - Google Patents
Venturi enamel heat exchanger for boiler Download PDFInfo
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- CN214840735U CN214840735U CN202120548764.XU CN202120548764U CN214840735U CN 214840735 U CN214840735 U CN 214840735U CN 202120548764 U CN202120548764 U CN 202120548764U CN 214840735 U CN214840735 U CN 214840735U
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- venturi
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- exchange tube
- enamel
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Abstract
The utility model discloses a venturi enamel heat exchanger for boiler, which belongs to the field of heat exchanger, comprising a heat exchange tube, wherein the heat exchange tube is connected through a tube plate, the heat exchange tube is provided with a plurality of sections of venturi structures, each section of the venturi structure comprises a reduction section, a throat part and a gradual expansion section, the surface of the heat exchange tube is provided with an enamel layer, the utility model can increase the disturbance of fluid in the tube through the venturi form and enhance the heat exchange intensity; the heat exchange tube has a structural shape, can generate low-frequency micromotion under the action of a medium, has a strong self-cleaning effect, can effectively improve the corrosion resistance of the tube after the surface of the tube is subjected to enamel plating treatment, and is not easy to scale.
Description
Technical Field
The utility model relates to a heat exchanger field, concretely relates to venturi enamel heat exchanger for boiler.
Background
Most heat exchangers of the existing boilers are limited by dust deposition, abrasion and the like, the main heating surface is still arranged into a light tube bundle, but the heat efficiency of the light tube bundle is low, the heat efficiency is particularly large when the heat tube bundle is arranged, and the manufacturing cost is high. Meanwhile, the exhaust gas temperature of the boiler is generally high due to the limitation of cost and corrosion, the design exhaust gas temperature of the boiler provided with the air preheater is generally 130-160 ℃, and the exhaust gas temperature of boilers with special fuels (such as garbage furnaces, biomass boilers, coke oven gas furnaces and the like) is even higher. Because the air temperature at the cold air end inlet of the air preheater is low, the wall temperature of the cold air inlet pipe of the air preheater is generally lower than the acid dew point of the flue gas, and the corrosion of the pipe is serious. The long-term operation will have great influence on the safe operation and the service life of the boiler.
In view of the problem that above-mentioned prior art exists, the utility model discloses combine many years's of design and experience of use in relevant field, assist too strong professional knowledge, the design has made a venturi enamel heat exchanger for boiler, overcomes above-mentioned defect.
SUMMERY OF THE UTILITY MODEL
As for the problems existing in the prior art, the Venturi enamel heat exchanger for the boiler can increase the disturbance of fluid in the pipe in a Venturi form and enhance the heat exchange strength; the heat exchange tube has a structural shape, can generate low-frequency micro motion under the action of a medium, and has a strong self-cleaning effect; after the surface of the pipe is plated with enamel, the corrosion resistance of the pipe can be effectively improved, and scaling is not easy to occur.
In order to realize the purpose, the utility model discloses a technical scheme as follows: the utility model provides a venturi enamel heat exchanger for boiler, includes the heat exchange tube, the heat exchange tube passes through the tube sheet and connects, the heat exchange tube is equipped with a plurality of sections venturi structures, every section the venturi structure is including reducing section, throat and the section of gradually expanding, the heat exchange tube surface is equipped with the enamel layer.
Preferably, each segment is connected end to end adjacent the venturi structure or each segment is connected adjacent the venturi structure by a light pipe.
Preferably, the two ends and the middle position of the heat exchange tube adopt light tubes, and a plurality of venturi structures are arranged between the middle position and the two ends.
Preferably, the diameter of the light pipe is equal to the diameter of the throat; or the diameter of the light pipe is equal to the maximum diameter of the divergent section.
The utility model discloses an useful part lies in:
(1) the utility model discloses the heat exchange tube adopts venturi structure shape, can produce the low frequency fine motion under the medium action, has stronger self-cleaning effect, combines the enamel layer of surface, is difficult for the scale deposit, has effectively improved the corrosion resistance of pipe, can further reduce exhaust gas temperature, improves boiler efficiency.
(2) The utility model discloses venturi structure can reduce pipe mechanical stress from taking the compensation function, can not produce tube sheet and heat exchange tube fracture phenomenon.
(3) The utility model discloses the multiplicable unit heat transfer area heat transfer efficiency of venturi structure has improved coefficient of heat transfer, and has arranged more heat transfer area in the unit area, multiplicable heat transfer area more than 25%.
Drawings
FIG. 1 is a partial structure schematic diagram of a Venturi enamel heat exchanger for a boiler;
FIG. 2 is a schematic diagram of an embodiment of a venturi enamel heat exchanger heat exchange tube for a boiler;
FIG. 3 is a schematic diagram of another embodiment of a venturi enameled heat exchanger heat exchange tube for a boiler.
In the figure: 1-heat exchange tube, 2-tube plate, 11-light tube, 12-Venturi structure.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 3, the venturi enamel heat exchanger for the boiler comprises a heat exchange tube 1, two ends of the heat exchange tube 1 are connected through a tube plate 2, the heat exchange tube 1 is provided with a plurality of venturi structures 12, each venturi structure 12 comprises a reduction section, a throat section and a gradual expansion section, and an enamel layer is arranged on the surface of the heat exchange tube 1. The utility model discloses heat exchange tube 1 adopts venturi structure 12 shapes, can produce the low frequency fine motion under the medium action, has stronger self-cleaning effect, combines the enamel layer of surface, is difficult for the scale deposit, has effectively improved the corrosion resistance of pipe, can further reduce exhaust gas temperature, improves boiler efficiency.
Specifically, each section of adjacent venturi structure 12 is connected end to end, or each section of adjacent venturi structure 12 is connected through a light pipe 11, the light pipe 11 is preferably adopted at two ends and a middle position of the heat exchange tube 1, and a plurality of sections of venturi structures 12 are arranged between the middle position and the two ends.
The diameter of the light pipe 11 of the utility model is equal to the diameter of the throat part; alternatively, the diameter of the light pipe 11 is equal to the maximum diameter of the divergent section.
The whole structure can increase the heat transfer efficiency of unit heat exchange area, improve the heat transfer coefficient, arrange more heat exchange areas in the unit area, and increase the heat exchange area by more than 25%; in addition, the venturi structure 12 has a compensation function, so that the mechanical stress of the tube can be reduced, and the cracking phenomenon of the tube plate 2 and the heat exchange tube 1 can not be generated.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes, modifications and/or alterations to the present invention may be made by those skilled in the art after reading the technical disclosure of the present invention, and all such equivalents may fall within the scope of the present invention as defined by the appended claims.
Claims (4)
1. The utility model provides a venturi enamel heat exchanger for boiler which characterized in that: the heat exchange tube is connected through a tube plate, the heat exchange tube is provided with a plurality of venturi structures, each venturi structure comprises a reduction section, a throat part and a gradual expansion section, and an enamel layer is arranged on the surface of the heat exchange tube.
2. The venturi enamel heat exchanger for boiler according to claim 1, wherein: each segment is connected end to end adjacent the venturi structure or each segment is connected through a light pipe adjacent the venturi structure.
3. The venturi enamel heat exchanger for boiler according to claim 1, wherein: the two ends and the middle position of the heat exchange tube adopt light tubes, and a plurality of venturi structures are arranged between the middle position and the two ends.
4. A venturi enamel heat exchanger for boiler according to claim 3 characterized in that: the diameter of the light pipe is equal to the diameter of the throat part; or the diameter of the light pipe is equal to the maximum diameter of the divergent section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120548764.XU CN214840735U (en) | 2021-03-17 | 2021-03-17 | Venturi enamel heat exchanger for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120548764.XU CN214840735U (en) | 2021-03-17 | 2021-03-17 | Venturi enamel heat exchanger for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214840735U true CN214840735U (en) | 2021-11-23 |
Family
ID=78758716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120548764.XU Active CN214840735U (en) | 2021-03-17 | 2021-03-17 | Venturi enamel heat exchanger for boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214840735U (en) |
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2021
- 2021-03-17 CN CN202120548764.XU patent/CN214840735U/en active Active
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