CN107218838A - The many oval extended surface tube heat exchange elements of oval fin - Google Patents
The many oval extended surface tube heat exchange elements of oval fin Download PDFInfo
- Publication number
- CN107218838A CN107218838A CN201710409147.XA CN201710409147A CN107218838A CN 107218838 A CN107218838 A CN 107218838A CN 201710409147 A CN201710409147 A CN 201710409147A CN 107218838 A CN107218838 A CN 107218838A
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- China
- Prior art keywords
- fin
- oval
- base tube
- tube
- heat exchange
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Classifications
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- 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
- F28F1/32—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 having portions engaging further tubular elements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to oval extended surface tube heat exchange element more than a kind of oval fin, it includes the base tube of at least three parallel arrangements, 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 fin is made up of the half elliptic of quantity identical with base tube, each half elliptic is outwards to offset same distance by the outward flange of each base tube to be formed, to cause fin outward flange outer peripheral apart from equal recently with base tube, the outward flange of the monosymmetric two half elliptic fins of each base tube is located on same ellipse, and leave process gap between every group of symmetrical fin 2, and leave process gap between symmetrical fin on oval 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 many oval extended surface tube heat exchange elements of oval fin.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.
Many gilled tubes(Number of tubes is more than or equal to 3)Heat exchange element does not have also in the market.Currently used for above-mentioned heat exchange
The extended surface of the elliptical heat exchange tube of device is H type fins, such as H types list elliptic heat exchange tube and H type bielliptic(al) heat exchanger tubes, is
It is as shown in Figure 1 H type bielliptic(al) heat exchanger tubes, wherein base tube 1 is elliptical tube, fin 2 by H types circular section heat exchanger tube is transplanted
It 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, and it is circle to be different from base tube
The H type gilled tubes in section, are illustrated in figure 2 H type Double Circle heat exchanger tubes.The heat-transfer mechanism of fin is by flue gas(Gas)Heat
WATER AS FLOW MEDIUM in base tube 1 is delivered to by heat transfer(Or steam water interface), or the heat transfer of medium in base tube 1 given
Gas outside base tube 1, in the case of other influence factors all identicals, fin transmits the size of heat ability, that is, hot biography
Lead efficiency and the height of fin(Nearest outward flange size of the outermost edge of fin apart from base tube 1)There is close relationship, height
Smaller heat-transfer capability is bigger, otherwise smaller.H type fin outward flanges are can be seen that apart from the nearest outward flange of base tube 1 from Fig. 1 and Fig. 2
Size be all that outer peripheral size is maximum recently apart from base tube 1 by wherein summit A, and A places transmit the effect of heat most
The utilization rate of heating surface is minimum at difference, that is, A, and the utilization rate for improving heating surface is the purpose of patent of the present invention, if by A
Heating surface be used for other places, the outside C places of B points in such as Fig. 1 and Fig. 2, as long as apart from the nearest outer peripheral size L1 of base tube 1 at C
Less than, apart from the nearest outer peripheral size L of base tube 1, heat transfer effect then increases at A.
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 many oval fins for above-mentioned prior art
Piece pipe heat exchange element(Elliptical tube quantity is more than or equal to 3), its not only inned coefficient it is high, and uniform distribution of temperature field, dust stratification enters
One step is reduced, and the heat exchange efficiency of whole gilled tube 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 many ellipse pipe heat exchange elements of oval fin,
It includes the base tube of at least three parallel arrangements, both sides Welding flat steel of the base tube along airflow direction, and is located at base tube both sides
Some groups of symmetrical fins, the section of the base tube is ellipse, and the fin is half ellipse by quantity identical with base tube
Circle is constituted, and each half elliptic is outwards to offset same distance by the outward flange of each base tube to be formed, to cause outside fin
Edge and base tube are outer peripheral recently apart from equal, and the outward flanges of each monosymmetric two half elliptic fins of base tube is located at same
Process gap c is left on one ellipse, and between every group of symmetrical fin and band steel, the outside wall surface of the fin and oval base tube is adopted
Connected with the mode 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 bielliptic(al) shape heat exchanger tube.
Fig. 2 is the structural representation of existing H types Double Circle heat exchanger tube.
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 shown in Fig. 3-5, the present invention relates to oval extended surface tube heat exchange element more than a kind of oval fin(Elliptical tube quantity
More than or equal to 3), include the base tubes 1 of at least three parallel arrangements, and be located at some groups of every both sides of foundation pipe 1 it is symmetrical
Fin 2 and be located at the band steel 3 that is arranged symmetrically of the base tube 1 along airflow direction both sides, symmetrical every group of fin 2 composition it is flat
Face is each perpendicular to the direction of axis line of base tube, and the section of the base tube 1 is ellipse, the fin 2 by with the identical number of base tube 1
The half elliptic of amount is constituted, and each half elliptic is outwards to offset same distance by the outward flange of each base tube 1 to be formed, to cause
The outward flange of fin 2 and base tube 1 are outer peripheral recently to reach uniform distribution of temperature field apart from equal, and heat transfer effect is optimal, Mei Geji
The outward flange for managing monosymmetric two half elliptic fins is located on same ellipse, and is left between every group of symmetrical fin 2
Process gap, the outside wall surface of the fin 2 and oval base tube 1 by the way of welding using being connected, and band steel 3 and ellipse base tube 1 can be with
It is welded to connect, 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 many oval extended surface tube heat exchange elements of oval fin, it includes the base tube of at least three parallel arrangements(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 being arranged symmetrically for airflow direction both sides
Band steel(3), it is characterised in that:The base tube(1)Section be ellipse, each monosymmetric two semiellipses of base tube
The outward flange of shape fin is located on same ellipse, and every group of symmetrical fin(2)Between leave process gap, and every group symmetrical
Fin(2)Between leave process gap, the fin(2)By with base tube(1)The half elliptic of identical quantity is constituted, and each half is ellipse
Circle is by each base tube(1)Outwards the same distance of skew is formed for outward flange, to cause fin(2)Outward flange and base tube(1)
It is outer peripheral apart from equal, the fin recently(2)With oval base tube(1)Outside wall surface using welding by the way of connect.
2. according to oval extended surface tube heat exchange element more than a kind of oval fin 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 oval extended surface tube heat exchange element more than a kind of oval fin 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 oval extended surface tube heat exchange element more than a kind of oval fin of claim 1, it is characterised in that:Every group of symmetrical rib
Piece(2)With band steel(3)Between process gap according to base tube(1)Size is adjusted, usually 2-20mm.
5. according to oval extended surface tube heat exchange element more than a kind of oval fin of claim 1, it is characterised in that:Symmetrical band steel(3)
Width a and thickness b determine that usual a is 6-50mm, and b is 3-12mm according to the size of pipe and the characteristic of air-flow.
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 |
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CN201710409147.XA CN107218838A (en) | 2017-06-02 | 2017-06-02 | The many oval extended surface tube heat exchange elements of oval fin |
Applications Claiming Priority (1)
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CN201710409147.XA CN107218838A (en) | 2017-06-02 | 2017-06-02 | The many oval extended surface tube heat exchange elements of oval fin |
Publications (1)
Publication Number | Publication Date |
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CN107218838A true CN107218838A (en) | 2017-09-29 |
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ID=59947120
Family Applications (1)
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CN201710409147.XA Withdrawn CN107218838A (en) | 2017-06-02 | 2017-06-02 | The many oval extended surface tube heat exchange elements of oval fin |
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CN (1) | CN107218838A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107747884A (en) * | 2017-10-20 | 2018-03-02 | 华能南京金陵发电有限公司 | H X-shaped gilled tubes |
-
2017
- 2017-06-02 CN CN201710409147.XA patent/CN107218838A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107747884A (en) * | 2017-10-20 | 2018-03-02 | 华能南京金陵发电有限公司 | H X-shaped gilled tubes |
CN107747884B (en) * | 2017-10-20 | 2024-05-10 | 华能南京金陵发电有限公司 | H-X-shaped ribbed tube |
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SE01 | Entry into force of request for substantive examination | ||
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WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170929 |
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WW01 | Invention patent application withdrawn after publication |