CN206944797U - Polygon fin list ellipse extended surface tube heat exchange element - Google Patents
Polygon fin list ellipse extended surface tube heat exchange element Download PDFInfo
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- CN206944797U CN206944797U CN201720632935.0U CN201720632935U CN206944797U CN 206944797 U CN206944797 U CN 206944797U CN 201720632935 U CN201720632935 U CN 201720632935U CN 206944797 U CN206944797 U CN 206944797U
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- fin
- base tube
- ellipse
- heat exchange
- tube
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Abstract
It the utility model is related to a kind of polygon fin list ellipse extended surface tube heat exchange element, it includes the base tube of single arrangement, and it is located at some groups of symmetrical fins of base tube both sides and is 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 polygon, and each summit of fin is on same ellipse, the ellipse is outwards to offset certain distance by the outward flange of base tube to be formed, gap is left between every group of symmetrical fin, the fin is connected with the outside wall surface of oval base tube by the way of welding.Not only inned coefficient is high for the utility model, 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
It the utility model is related to a kind of heat exchange element, more particularly to a kind of polygon fin list ellipse extended surface tube heat exchange member
Part.It is related to 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
It is wider, degree is increasingly severe, people are most deep to the susceptibility of atmosphere pollution, because related to people's " inhale inhale ".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, State Ministry of Environmental Protection and National Energy Board 2014 are according to State Council
《Energy development strategy action plan(2014-2020)》Combine and issue《The energy-saving and emission-reduction of coal electricity upgrade 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 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,
Reaching reduces the purpose of 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, also progressively it is 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 H type ellipse gilled tubes 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, otherwise 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, improve heating surface
Utilization rate is the purpose of this utility patent, if the heating surface at A is used for into other places, such as the outside C of B points in Fig. 1 and Fig. 2
Place, as long as outer peripheral size L1 less than at A imitate recently apart from base tube 1 by outer peripheral size L, heat exchange recently apart from base tube 1 at C
Fruit then increases.
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 vortex be present, 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 have the function that to improve heat transfer effect.
Utility model content
Technical problem to be solved in the utility model is ellipse for a kind of polygon fin list of above-mentioned prior art offer
Circle extended surface tube heat exchange element, not only inned coefficient is high for it, and uniform distribution of temperature field, dust stratification are further reduced, whole fin
The heat exchange efficiency of pipe is high, and metal consumption is low in the case of identical heat output.
The technical scheme in the invention for solving the above technical problem is:A kind of polygon fin list elliptical tube heat exchange member
Part, 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 base tube both sides
Symmetrical fin, the section of the base tube is ellipse, and the fin is polygon, and each summit of fin is positioned at same
On one ellipse, the ellipse is outwards to offset certain distance by the outward flange of base tube to be formed, between every group of symmetrical fin and band steel
Process gap c is left, the fin is connected with the outside wall surface of oval base tube 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 6-50mm according to the size of pipe and the characteristic of air-flow,
B is 3-12mm.
Preferably, the band steel and oval base tube are welded to connect or custom-made ellipse extended surface tube.
Compared with prior art, the utility model has the advantage of:
The utility model is made compared to reducing air-flow as a result of oval base tube, with circular base tube by base tube surface
Into drag losses, so as to reduce energy consumption, and base tube has welded band steel along the both sides of airflow direction, destroys the vortex of air-flow
Area, reduce containing grey air-flow at the back side of the dust stratification, especially airflow scouring of tube surface, so as to further increase heat exchange effect
Fruit, simultaneously as fin outward flange is closely sized to equal apart from base tube is outer peripheral recently, the uniform distribution of temperature field of fin, change
Thermal effect is best, the utilization rate highest of fin, and metal consumption is low in the case of 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 existing H types list circle heat exchanger tube.
Fig. 3 is front view of the present utility model.
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 utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Fig. 3-5, a kind of polygon fin list ellipse extended surface tube heat exchange element is the utility model is related to, it includes
The base tube 1 of single arrangement, and be located at some groups of symmetrical fins 2 of the both sides of base tube 1 and be located at base tube 1 along airflow direction
The band steel 3 being arranged symmetrically of both sides, the section of the base tube 1 is ellipse, and the fin 2 is polygon, and fin 2 is each
On same ellipse, the ellipse is outwards to offset certain distance by the outward flange of base tube 1 to be formed on summit, so as to obtain on polygon
Each point to 1 outer peripheral minimum distance of base tube close to equal, reach uniform distribution of temperature field, heat transfer effect is optimal, every group
Process gap is left between symmetrical fin 2, the fin 2 is connected with the outside wall surface of oval base tube 1 by the way of welding, flat
Steel 3 can connect with welding with oval base tube 1, can also custom-made ellipse extended surface tube.
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 being 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 as to reduce energy consumption, and base tube
Band steel has been welded along the both sides of airflow direction, has destroyed the vortex of air-flow, has reduced the dust stratification in tube surface containing grey air-flow,
The especially back side of airflow scouring, so as to further increase heat transfer effect, while the outward flange of fin 2 is outer recently apart from base tube 1
Being closely sized to for edge is equal, reaches uniform distribution of temperature field, and heat transfer effect is optimal, therefore is to save material compared with H type fins
Material so that the weight reduction of whole heat exchange element and heat-exchanger rig.
A kind of preferably implementation of the present utility model is the foregoing is only, not to limit the utility model,
All non-essential modifications made in the utility model spirit, replacement, improvement etc., should be included in of the present utility model
Within protection domain.
Claims (6)
1. a kind of polygon fin list ellipse extended surface tube heat exchange element, 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), every group of fin symmetrically(2)The plane of composition is each perpendicular to the direction of axis line of base tube, it is characterised in that:The base
Pipe(1)Section for ellipse, the fin(2)For polygon, and fin(2)Each summit positioned at it is same ellipse on, should
Ellipse is by base tube(1)Outward flange outwards offset certain distance and formed, every group of symmetrical fin(2)Between leave technology room
Gap, the fin(2)With oval base tube(1)Outside wall surface using welding by the way of connect.
A kind of 2. polygon fin list ellipse extended surface tube heat exchange element according to claim 1, it is characterised in that:Every group of rib
Piece(2)It is with oval base tube(1)Long axis direction be arranged symmetrically.
A kind of 3. polygon fin list ellipse extended surface tube heat exchange element according to claim 1, it is characterised in that:Positioned at ellipse
Physa pipe(1)On adjacent sets fin(2)Spacing is arranged as required to, usually 5-50mm.
A kind of 4. polygon fin list ellipse extended surface tube heat exchange element according to claim 1, it is characterised in that:Every group pair
The fin of title(2)With band steel(3)Between process gap according to base tube(1)Size is adjusted, usually 2-20mm.
A kind of 5. polygon fin list ellipse extended surface tube heat exchange element according to claim 1, it is characterised in that:Symmetrically
Band steel(3)Width a and thickness b determine that usual a is 6-50mm, b 3- according to the size of pipe and the characteristic of air-flow
12mm。
A kind of 6. polygon fin list ellipse extended surface tube heat exchange element according to claim 1, it is characterised in that:It is described
Band steel(3)With oval base tube(1)It is welded to connect or custom-made ellipse extended surface tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201720632935.0U CN206944797U (en) | 2017-06-02 | 2017-06-02 | Polygon fin list ellipse extended surface tube heat exchange element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201720632935.0U CN206944797U (en) | 2017-06-02 | 2017-06-02 | Polygon fin list ellipse extended surface tube heat exchange element |
Publications (1)
Publication Number | Publication Date |
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CN206944797U true CN206944797U (en) | 2018-01-30 |
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CN201720632935.0U Active CN206944797U (en) | 2017-06-02 | 2017-06-02 | Polygon fin list ellipse extended surface tube heat exchange element |
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2017
- 2017-06-02 CN CN201720632935.0U patent/CN206944797U/en active Active
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