CN202973882U - Variable-diameter-type radiation furnace tube of heating furnace - Google Patents
Variable-diameter-type radiation furnace tube of heating furnace Download PDFInfo
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- CN202973882U CN202973882U CN 201220494132 CN201220494132U CN202973882U CN 202973882 U CN202973882 U CN 202973882U CN 201220494132 CN201220494132 CN 201220494132 CN 201220494132 U CN201220494132 U CN 201220494132U CN 202973882 U CN202973882 U CN 202973882U
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- heating furnace
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Abstract
The utility model discloses a variable-diameter-type radiation furnace tube of a heating furnace, which can be used in the field of petrochemical engineering, strengthens the heat transmission process, and reduces coking inside the tube. The radiation furnace tube of the variable-diameter-type heating furnace comprises a light tube section (1) and a variable-diameter unit (2) consisting of gradual reducing sections (3), variable-diameter sections (4) and gradual expanding sections (5), wherein at least one group of the variable-diameter units (2) is arranged in a flowing direction of a fluid from an inlet (6) of the furnace tube. The variable-diameter-type radiation furnace tube of the heating furnace can cause pulsation change of the flowing velocity inside the tube so as to damage a boundary layer and achieve the possibilities of strengthening heat transmission and reducing coking inside the tube. The radiation furnace tube can be applicable to tube-type heating furnaces in the field of petrochemical engineering, as well as heating furnaces adopting radiation furnace tubes for heating media inside tubes in other industries.
Description
Technical field
The present invention relates to the reducing type heating furnace radiating furnace tube in a kind of heating furnace for adopting medium in the radiating furnace tube heating tube, be particularly useful for the tubular heater of petrochemical industry.
Background technology
Tubular heater is the Furnace that uses in petroleum refining, petrochemical industry and chemistry, chemical fibre industry, its effect is by inflammable and explosive hydrocarbon gas or liquid phase oil product in the heat furnace tubing of gas or liquid fuel combustion release, to reach technological requirement.Compare with general industrial furnace, tubular heater is dangerous large, and operating condition is harsh, and easily coking affects long-term operation.This all gives the operation of tubular heater and optimizes operation and brought difficulty.
Boiler tube is that tubular heater carries out the visual plant that heat transmits.Boiler tube need to move under the exacting terms such as high temperature, high pressure and Korrosionsmedium for a long time, more easily damages than miscellaneous equipment and parts.If furnace tube heat transfer efficient is higher, coking is few, can realize the energy-saving and cost-reducing target of enterprise, also bring economic well-being of workers and staff hugely for enterprise.The present measure that solves boiler tube efficient heat transfer, minimizing coking is mainly that increase flow-disturbing spare, raising boiler tube inner wall roughness, employing counter-current flow improve the temperature difference etc. in boiler tube, and limitation is arranged.Increase to a certain extent flow resistance such as increasing flow-disturbing spare and improving inner wall roughness, can not realize well the purpose of efficient heat transfer, minimizing coking.
Summary of the invention
The present invention proposes a kind of reducing type heating furnace radiating furnace tube.This boiler tube relatively simple for structure, due to the flow section cyclically-varying, the alternate cycle pulsatile change also can occur in flow velocity thereupon, Hydrodynamic turbulence strengthens, and is conducive to mix and reduce the boundary layer, and then prevents coking, augmentation of heat transfer, flow resistance increases not too large simultaneously.Therefore, reducing type heating furnace radiating furnace tube of the present invention can be realized well efficient heat transfer, reduce the target of coking, thereby improves the thermal efficiency of heating furnace, reduces fuel consumption, extends the cycle of operation, improves economic well-being of workers and staff.
The reducing type heating furnace radiating furnace tube that the present invention proposes, comprise light pipe section (1) and reducing unit (2), wherein reducing unit (2) are comprised of converging transition (3), reducer (4), divergent segment (5), and arrange at least one group along fluid flow direction on the boiler tube straight length.
In described reducing type heating furnace radiating furnace tube, the length L 1 of converging transition (3) is 0.1～10 times of light pipe section (1) inner diameter D.
In described reducing type heating furnace radiating furnace tube, the inner diameter D 1 of reducer (4) is 0.75～1.25 times of light pipe section (1) inner diameter D, and length L 2 is 0.1～20 times of light pipe section (1) inner diameter D.
In described reducing type heating furnace radiating furnace tube, the length L 3 of divergent segment (5) is 0.1～10 times of light pipe section (1) inner diameter D.
Described reducing type heating furnace radiating furnace tube, reducing unit (2) arranges many groups from boiler tube entrance (6) along fluid flow direction, and the spacing L between two adjacent groups reducing unit (2) is 1～80 times of light pipe section (1) inner diameter D.
Described reducing type heating furnace radiating furnace tube is applicable to all heating furnaces that adopt medium in the radiating furnace tube heating tube.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 and Fig. 2 are the reducing type heating furnace radiating furnace tube embodiment schematic diagrames that the present invention proposes.
Fig. 3 and Fig. 4 are the reducing unit enlarged diagrams of the reducing type heating furnace radiating furnace tube that proposes of the present invention.
In Fig. 1 to Fig. 4,1. light pipe section, 2. reducing unit, 3. converging transition, 4. reducer, 5. divergent segment, 6. boiler tube entrance, 7. boiler tube outlet.
The specific embodiment
Referring to figs. 1 to Fig. 4, the reducing type heating furnace radiating furnace tube that the present invention proposes, comprise light pipe section (1) and reducing unit (2), wherein reducing unit (2) are comprised of converging transition (3), reducer (4), divergent segment (5), and arrange at least one group along fluid flow direction on the boiler tube straight length.
Referring to figs. 1 to Fig. 4, the length L 1 of converging transition (3) is 0.1～10 times of light pipe section (1) inner diameter D.
Referring to figs. 1 to Fig. 4, the inner diameter D 1 of reducer (4) is 0.75～1.25 times of light pipe section (1) inner diameter D, and length L 2 is 0.1～20 times of light pipe section (1) inner diameter D.
Referring to figs. 1 to Fig. 4, the length L 3 of divergent segment (5) is 0.1～10 times of light pipe section (1) inner diameter D.
Referring to figs. 1 to Fig. 4, reducing unit (2) arranges many groups from boiler tube entrance (6) along fluid flow direction, and the spacing L between two adjacent groups reducing unit (2) is 1～80 times of light pipe section (1) inner diameter D.
The reducing type heating furnace radiating furnace tube that the present invention proposes is applicable to all heating furnaces that adopt medium in the radiating furnace tube heating tube.
The use procedure of the reducing type heating furnace radiating furnace tube that the present invention proposes, can be for example: heated medium enters boiler tube light pipe section (1) from boiler tube entrance (6), then at least one reducing unit (2) of flowing through flows out from boiler tube outlet (7).When wherein flowing through reducing unit (2), due to the variation of boiler tube cross-sectional area generating period, and flow remains unchanged, so the cross section flow velocity also presents periodic pulsatile change rule, and then strengthens and mix and diabatic process; Due to the constraint for fluid flow direction of converging transition and divergent segment, make fluid originally along on the basis that the boiler tube axial direction flows, increased and axial flow direction Radial Flow at an angle, therefore destroyed near the flowing law the boundary layer, thereby augmentation of heat transfer, and less coking.
The diameter of the reducer (4) in the reducing type heating furnace radiating furnace tube that the present invention proposes can be greater than the internal diameter of light pipe section (1), also can be less than the internal diameter of light pipe section (1).When many group reducings unit was set on boiler tube inner fluid flow direction, the structural parameters of each reducing unit can be identical, also can be different.
The material of the reducing unit in the reducing type heating furnace radiating furnace tube that the present invention proposes is identical with the material of light pipe section.Can adopt the method such as casting, forging of integral type, be welded on light pipe again after also can passing through the moulding such as casting, forging.
Claims (6)
1. reducing type heating furnace radiating furnace tube, comprise light pipe section (1) and reducing unit (2), it is characterized in that: reducing unit (2) is comprised of converging transition (3), reducer (4), divergent segment (5), and arranges at least one group along fluid flow direction on the boiler tube straight length.
2. reducing type heating furnace radiating furnace tube according to claim 1 is characterized in that: the length L 1 of converging transition (3) is 0.1～10 times of light pipe section (1) inner diameter D.
3. reducing type heating furnace radiating furnace tube according to claim 1 is characterized in that: the inner diameter D 1 of reducer (4) is 0.75～1.25 times of light pipe section (1) inner diameter D, and length L 2 is 0.1～20 times of light pipe section (1) inner diameter D.
4. reducing type heating furnace radiating furnace tube according to claim 1 is characterized in that: the length L 3 of divergent segment (5) is 0.1～10 times of light pipe section (1) inner diameter D.
5. reducing type heating furnace radiating furnace tube according to claim 1, it is characterized in that: reducing unit (2) arranges many groups from boiler tube entrance (6) along fluid flow direction, and the spacing L between two adjacent groups reducing unit (2) is 1～80 times of light pipe section (1) inner diameter D.
6. reducing type heating furnace radiating furnace tube according to claim 1, is characterized in that: be applicable to the heating furnace that all adopt medium in the radiating furnace tube heating tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220494132 CN202973882U (en) | 2012-09-26 | 2012-09-26 | Variable-diameter-type radiation furnace tube of heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220494132 CN202973882U (en) | 2012-09-26 | 2012-09-26 | Variable-diameter-type radiation furnace tube of heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202973882U true CN202973882U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220494132 Expired - Fee Related CN202973882U (en) | 2012-09-26 | 2012-09-26 | Variable-diameter-type radiation furnace tube of heating furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN202973882U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673604A (en) * | 2012-09-26 | 2014-03-26 | 中国石油大学(北京) | Reducing radiation furnace tube of heating furnace |
-
2012
- 2012-09-26 CN CN 201220494132 patent/CN202973882U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673604A (en) * | 2012-09-26 | 2014-03-26 | 中国石油大学(北京) | Reducing radiation furnace tube of heating furnace |
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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: 20130605 Termination date: 20180926 |
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| CF01 | Termination of patent right due to non-payment of annual fee |