CN107228592A - The oval extended surface tube heat exchange element of oval fin list - Google Patents
The oval extended surface tube heat exchange element of oval fin list Download PDFInfo
- Publication number
- CN107228592A CN107228592A CN201710409112.6A CN201710409112A CN107228592A CN 107228592 A CN107228592 A CN 107228592A CN 201710409112 A CN201710409112 A CN 201710409112A CN 107228592 A CN107228592 A CN 107228592A
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- CN
- China
- Prior art keywords
- oval
- fin
- base tube
- tube
- heat exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/30—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means being attachable to the element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
Abstract
The present invention relates to a kind of oval extended surface tube heat exchange element of oval fin list, it includes the base tube of single arrangement, and be located at some groups of symmetrical fins of base tube both sides and be located at the band steel that is arranged symmetrically of the base tube along airflow direction both sides, the section of the base tube is ellipse, the outward flange of two symmetrically arranged fins is located on same ellipse, and leave process gap between every group of symmetrical fin, the outward flange of the fin is that outwards skew is formed at a certain distance with the outward flange of oval base tube, to cause oval fin outward flange equal sized apart from the nearest outward flange of base tube, the fin is connected with the outside wall surface of oval base tube by the way of welding.Not only inned coefficient is high by the present invention, and uniform distribution of temperature field, and dust stratification is few, and the heat exchange efficiency of whole gilled tube is high, and opposing metallic consumption is low.
Description
Technical field
The present invention relates to a kind of heat exchange element, more particularly to a kind of oval extended surface tube heat exchange element of oval fin list.Relate to
And electric power, environmental protection, the energy, chemical industry, building materials, metallurgy and other industry and people's livelihood technical field of heat exchange equipment.
Background technology
With the high speed development of Chinese national economy, environmental pollution is inevitably caused（Atmosphere pollution, water pollution and
Land pollution）, in recent years, environmental pollution becomes increasingly conspicuous, particularly atmosphere pollution, and haze weather is more and more, scope is more next
Wider, degree is increasingly severe, and people are most deep to the susceptibility of atmosphere pollution, because related to people's " suction ".Atmosphere pollution
Crack cause it is a lot, such as airborne dust, vehicle exhaust, industrial discharge, wherein industrial discharge increasingly attract attention, particularly fired
The exhaust emissions of coal equipment, in power industry, National Development and Reform Committee, national environmental protection portion and National Energy Board 2014 are according to State Council
《Energy development Strategic Action Plan（2014-2020）》Combine and issue《Coal electricity energy-saving and emission-reduction upgrading and transformation action plan
（2014-2020）》, this action plan specify that target and the timing node requirement of energy-saving and emission-reduction.For this action plan, respectively
Utilities Electric Co. and coal-burning power plant have accordingly formulated specific energy-saving and emission-reduction modification scheme and implemented, the measures of energy-saving and emission-reduction it
One is exactly that, by the reduction of the exhaust gas temperature of boiler of power plant unit, so in modification scheme, will generally increase changing for flue gas and water newly
Thermal, some power plant also transform original heat-exchanger rig simultaneously, by heat-exchanger rig by the heat transfer of flue gas to WATER AS FLOW MEDIUM,
Reach the purpose of reduction exhaust gas temperature.This heat-exchanger rig is commonly referred to as economizer or flue gas in power plant（Water）Heat exchanger or flue gas
Cooler just claims heat exchanger.Most important element is exactly heat exchanger tube in heat-exchanger rig, the heat exchanger tube with extended surface,
Because comprehensive economic performance is high and saves space, it is widely used, the ellipse heat exchange especially with extended surface
Pipe, because dust stratification and abrasion are relatively light, is also progressively applied in some projects.
Extended surface currently used for the elliptical heat exchange tube of above-mentioned heat-exchanger rig is H type fins, is by H types circular section
Heat exchanger tube is transplanted, as shown in figure 1, wherein base tube 1 is elliptical tube, fin 2 is H types, because its shape is like English alphabet H,
And base tube is referred to as the oval gilled tube of H types for elliptical tube, the H type gilled tubes that base tube is circular section are different from, as shown in Figure 2.Rib
The heat-transfer mechanism of piece is by flue gas（Gas）Heat WATER AS FLOW MEDIUM in base tube 1 is delivered to by heat transfer（Or steam-water mixing
Thing）, or by the heat transfer of medium in base tube 1 to the gas outside base tube 1, in other influence factors all identical situations
Under, fin transmits the size of heat ability, that is, heat conduction efficiency and the height of fin（The outermost edge of fin is apart from base tube
1 nearest outward flange size）There is close relationship, highly smaller heat-transfer capability is bigger, on the contrary it is smaller.Can from Fig. 1 and Fig. 2
Go out, apart from base tube 1, outer peripheral size is all recently for H type fin outward flanges, and wherein summit A is outer recently apart from base tube 1
The size at edge is maximum, and the effect of A places transmission heat is worst, that is, at A heating surface utilization rate it is minimum, raising heating surface
Utilization rate is the purpose of patent of the present invention, if the heating surface at A be used in other places, such as Fig. 1 and Fig. 2 at the outside C of B points,
As long as apart from base tube 1, outer peripheral size L1 is less than at A apart from the nearest outer peripheral size L of base tube 1, heat transfer effect recently at C
Then increase.
Further to reduce dust stratification, the heat exchange efficiency of heat exchanger tube is improved, in both sides Welding flat steel of the base tube along airflow direction,
Such as Fig. 3 and Fig. 4.From hydrodynamics, fluid transversal flow pipe（Pipe or elliptical tube）When, pipe is in flow of fluid side
To front and rear sides there is vortex, containing ash air-flow will in vortex dust stratification, once heating surface pipe dust stratification will drop significantly
Low heat transfer effect, band steel will destroy vortex, reduce dust stratification, especially lee face, so as to reach the effect for improving heat transfer effect.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of oval fin list oval fin for above-mentioned prior art
Piece pipe heat exchange element, its not only inned coefficient height, and uniform distribution of temperature field, dust stratification is further reduced, whole gilled tube
Heat exchange efficiency is high, and metal consumption is low in the case of identical heat output.
The present invention the used technical scheme that solves the above problems is：A kind of oval fin list ellipse pipe heat exchange element,
It includes the base tube of single arrangement, both sides Welding flat steel of the base tube along airflow direction, and is located at some groups of phases of base tube both sides
Mutual symmetrical fin, the section of the base tube is ellipse, and the outward flange of two symmetrically arranged fins is located on same ellipse,
And process gap c is left between every group of symmetrical fin and band steel, the outward flange of the fin is with the outward flange of oval base tube
Outwards skew is formed at a certain distance, to cause fin outward flange and base tube outer peripheral recently apart from equal, the fin and
The outside wall surface of oval base tube is connected by the way of welding.
Preferably, every group of fin is arranged symmetrically with the long axis direction of oval base tube.
The fin spacing for the adjacent sets being preferably located on oval base tube is arranged as required to, usually 5-50mm.
Preferably, the process gap c between every group of symmetrical fin and band steel is adjusted according to base tube size, usually 2-
20mm。
Preferably, the width a and thickness b of band steel determine that usual a is 6- according to the size of pipe and the characteristic of air-flow
50mm, b are 3-12mm.
Preferably, the band steel is welded to connect or the oval extended surface tube of custom-made with oval base tube.
Compared with prior art, the advantage of the invention is that：
The present invention compares with circular base tube as a result of oval base tube and reduces air-flow by the resistance caused by base tube surface
Loss, so that energy consumption is reduced, and base tube has welded band steel along the both sides of airflow direction, destroys the vortex of air-flow, reduces
Containing grey air-flow at the back side of the dust stratification, especially airflow scouring of tube surface, so as to further increase heat transfer effect, simultaneously
Because fin outward flange is apart from nearest outer peripheral equal sized, the uniform distribution of temperature field of fin of base tube, heat transfer effect is best,
Metal consumption is low in the case of the utilization rate highest of fin, identical heat output.
Brief description of the drawings
Fig. 1 is the structural representation of existing H types list elliptical heat exchange tube.
Fig. 2 is the structural representation of the circular heat exchanger tube of existing H types list.
Fig. 3 is front view of the invention.
Fig. 4 is Fig. 3 top view.
Fig. 5 is Fig. 3 side view.
Wherein：
Base tube 1, fin 2, band steel 3.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
As in Figure 3-5, the present invention relates to a kind of oval extended surface tube heat exchange element of oval fin list, including single arrangement
Base tube 1, and be located at and some groups of symmetrical fins 2 of the both sides of base tube 1 and be located at pair of the base tube 1 along airflow direction both sides
Claim the band steel 3 of arrangement, the plane of symmetrical every group of fin 2 composition is each perpendicular to the direction of axis line of base tube, the base tube 1
Section be ellipse, the outward flanges of two symmetrically arranged fins 2 is located on same ellipse, and between every group of symmetrical fin 2
Process gap is left, the outward flange of the fin 2 is that outwards skew is formed at a certain distance with the outward flange of oval base tube 1,
To cause the outward flange of fin 2 and base tube 1 outer peripheral recently apart from equal, uniform distribution of temperature field is reached, heat transfer effect is optimal,
The fin 2 is connected with the outside wall surface of oval base tube 1 by the way of welding, and band steel 3 can be connected with welding with oval base tube 1,
Can also the oval extended surface tube of custom-made.
In the present embodiment, every group of fin is arranged symmetrically with the long axis direction of oval base tube, on oval base tube
The fin spacing of adjacent sets is 5-50mm, and the process gap between every group of fin 2 and band steel 3 that are arranged symmetrically is 2-20mm, by
In employing oval base tube, air-flow is reduced by the drag losses caused by base tube surface, so that energy consumption is reduced, and base tube
Band steel has been welded along the both sides of airflow direction, the vortex of air-flow is destroyed, the dust stratification in tube surface containing grey air-flow is reduced,
The especially back side of airflow scouring, so that heat transfer effect is further increased, while the outward flange of fin 2 is outer recently apart from base tube 1
Marginal dimension is equal, reaches uniform distribution of temperature field, and heat transfer effect is optimal, therefore is to save material compared with H type fins, makes
Obtain the weight reduction of whole heat exchange element and heat-exchanger rig.
A kind of preferable implementation of the present invention is the foregoing is only, is not intended to limit the invention, it is all in this hair
Non-essential modification, replacement, improvement for being made in bright spirit etc., should be included in the scope of the protection.
Claims (6)
1. a kind of oval extended surface tube heat exchange element of oval fin list, it includes the base tube of single arrangement（1）, and it is located at base tube
（1）Some groups of symmetrical fins of both sides（2）Be located at base tube（1）Along the band steel being arranged symmetrically of airflow direction both sides
（3）, it is characterised in that：The base tube（1）Section for ellipse, two symmetrically arranged fins（2）Edge be located at it is same
On ellipse, and every group of symmetrical fin（2）Between leave process gap, the fin（2）Edge be with oval base tube（1）'s
Outwards skew is formed at a certain distance on surface, to cause fin（2）Outward flange and base tube（1）It is outer peripheral apart from equal recently,
The fin（2）With oval base tube（1）Outside wall surface using welding by the way of connect.
2. according to a kind of oval extended surface tube heat exchange element of oval fin list of claim 1, it is characterised in that：Every group of fin（2）
It is with oval base tube（1）Long axis direction be arranged symmetrically.
3. according to a kind of oval extended surface tube heat exchange element of oval fin list of claim 1, it is characterised in that：Positioned at oval base tube
（1）On adjacent sets fin（2）Spacing is arranged as required to, usually 5-50mm.
4. according to a kind of oval extended surface tube heat exchange element of oval fin list of claim 1, it is characterised in that：Every group of symmetrical rib
Piece（2）Process gap between band steel 3 is according to base tube（1）Size is adjusted, usually 2-20mm.
5. according to a kind of oval extended surface tube heat exchange element of oval fin list of claim 1, it is characterised in that：Symmetrical band steel（3）
Width a and thickness b according to base tube（1）Size and air-flow characteristic determine, usual a be 6-50mm, b is 3-12mm.
6. according to a kind of oval extended surface tube heat exchange element of oval fin list of claim 1, it is characterised in that：The band steel（3）
With oval base tube（1）It is welded to connect or the oval extended surface tube of custom-made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409112.6A CN107228592A (en) | 2017-06-02 | 2017-06-02 | The oval extended surface tube heat exchange element of oval fin list |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409112.6A CN107228592A (en) | 2017-06-02 | 2017-06-02 | The oval extended surface tube heat exchange element of oval fin list |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107228592A true CN107228592A (en) | 2017-10-03 |
Family
ID=59933439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710409112.6A Withdrawn CN107228592A (en) | 2017-06-02 | 2017-06-02 | The oval extended surface tube heat exchange element of oval fin list |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107228592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775831A (en) * | 2018-07-25 | 2018-11-09 | 北京建筑大学 | A kind of butterfly finned tube exchanger preventing flue gas corrosion |
-
2017
- 2017-06-02 CN CN201710409112.6A patent/CN107228592A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775831A (en) * | 2018-07-25 | 2018-11-09 | 北京建筑大学 | A kind of butterfly finned tube exchanger preventing flue gas corrosion |
| WO2020019627A1 (en) * | 2018-07-25 | 2020-01-30 | 北京建筑大学 | Heat exchanger with butterfly finned pipe |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171003 |