CN201983678U - Heat exchange tube and combustor with spiral flat tube self-preheating device - Google Patents
Heat exchange tube and combustor with spiral flat tube self-preheating device Download PDFInfo
- Publication number
- CN201983678U CN201983678U CN2011200889629U CN201120088962U CN201983678U CN 201983678 U CN201983678 U CN 201983678U CN 2011200889629 U CN2011200889629 U CN 2011200889629U CN 201120088962 U CN201120088962 U CN 201120088962U CN 201983678 U CN201983678 U CN 201983678U
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- China
- Prior art keywords
- flat tube
- tube
- spiral flat
- burner
- heat exchanger
- 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.)
- Expired - Lifetime
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- 238000002485 combustion reaction Methods 0.000 claims description 34
- 239000000779 smoke Substances 0.000 claims description 17
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000003870 refractory metal Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a heat exchange tube and combustor that has flat pipe of spiral self preheating device. The heat exchange tube is a twisted spiral flat tube, the spiral flat tube comprises a spiral flat tube main body with a flat tubular section and a spiral flat tube end part connected with the spiral flat tube main body, and the section of the spiral flat tube end part is circular. The burner comprises at least: a flue gas chamber; the heat exchange tube for accommodating the gas to be preheated is arranged in the flue gas chamber and is the heat exchange tube. The utility model is simple in operation, the operation is reliable and stable to higher heat exchange efficiency has.
Description
Technical field
The utility model relates to industrial heating field, is specifically related to a kind of heat exchanger tube and the burner with spiral flat tube self-preheating device.
Background technology
Self-preheating type combustor can be used for the particularly direct or indirect of heat-treatment furnace of industrial furnace.The burner of the type utilizes the flue gas of self discharging by compact heat-exchanger rig warm-up combustion-supporting air, can guarantee temperature controlling and uniformity in the stove, helps improving the heating quality of product.
Current self-preheating type combustor adopts finned heat-exchanger rig substantially, and its material is heat resisting cast steel or pottery.This heat-exchanger rig is made of heat exchange straight tube and the fin that is arranged on the straight tube usually, structure is simpler, range of application is also wider, but conventional finned heat-exchanger rig, just near the fluid pre-heat effect tube wall is better, and tube hub is far away at a distance of the outer fluid distance of tube wall, and the heat exchange effect is relatively poor relatively, and the overall coefficient of heat transfer is not high.
In addition, because heat resisting cast steel thickness is bigger, and air and fume side all have only row's fin, fin height is limited, so the coefficient of heat transfer and heat exchange area all be difficult to increase again, the part far away more apart from the tube wall of straight tube on the fin, the heat exchange effect is poor more, and heat exchange is also inhomogeneous.
Therefore, for finned heat-exchanger rig, the problem of its existence is that heat exchange efficiency is lower, and exhaust gas temperature is very high.
In order to reduce exhaust gas temperature, the method that adopts honeycomb heat accumulation body to carry out flue gas waste heat recovery is also arranged, but this mode exists volume excessive for heat-treatment furnace with the small-power burner, simultaneously, this regenerative heat-exchange needs heat storage to replace heat exchange, bring the inconvenience on the Operation and Maintenance, this is relatively poor for the heat-treatment furnace applicability of having relatively high expectations, and has prolonged heat-exchange time.
The utility model content
The utility model provides a kind of heat exchanger tube and has the burner of spiral flat tube self-preheating device, to solve existing flue gas and the preheating gas heat exchange efficiency is lower, the problem that exhaust gas temperature is high.
For this reason, the utility model proposes a kind of heat exchanger tube, described heat exchanger tube is the spiral flat tube of distortion, and described spiral flat tube comprises that the cross section is the spiral flat tube main body of flat tube shape.
Described spiral flat tube also comprises the spiral flat tube end that is connected with described spiral flat tube main body, and the cross section of described spiral flat tube end is circular.
The cross section of described spiral flat tube is an ellipticity, and the ratio of described elliptoid short major axis is smaller or equal to 0.25.The distortion of described spiral flat tube is compared more than or equal to 6 smaller or equal to 12.
Described spiral flat tube adopts and flattens and heat is turned round two one-step formings, or the employing chilling press utilizes the mould one-shot forming of colding pressing.
The utility model also provides a kind of burner with spiral flat tube self-preheating device, and described burner comprises at least: smoke chamber; Hold the heat exchanger tube for the treatment of preheating gas, be arranged in the described smoke chamber, described heat exchanger tube is foregoing heat exchanger tube.
Described burner also comprises: combustion chamber that is communicated with described heat exchanger tube and the Gas Pipe that is communicated with described combustion chamber, described heat exchanger tube is a combustion-aid air pipe.
Described burner also comprises: be enclosed in the collection chamber outside the described combustion chamber, have circumferential weld between described combustion chamber and the described collection chamber; Described heat exchanger tube comprises the multi-detector flat tube, has at least row's spiral flat tube to be communicated with described collection chamber.
Described collection chamber is the collection chamber that refractory metal is made, and described combustion chamber is the combustion chamber that silicon carbide ceramics is made.
Described burner also comprises: the ignitor that stretches into described combustion chamber.
Described smoke chamber is formed by burner jacket tube and burner inner sleeve, described combustion chamber and described collection chamber are arranged on an end of described burner inner sleeve, described Gas Pipe is an exhaust gas nozzle, described Gas Pipe and described ignitor extend to described collection chamber from the other end of described burner inner sleeve, the side direction of described burner jacket tube is respectively equipped with treats preheating gas inlet and exhanst gas outlet, the described preheating gas inlet for the treatment of is connected with described heat exchanger tube, and described exhanst gas outlet is communicated with smoke chamber.
The heat exchanger tube that the utility model adopts is for the spiral flat tube of distortion, and with respect to straight tube and spiral coil (the spiral coil surface is non-warping), the outer surface of the spiral flat tube of distortion has promptly increased heat exchange area because distortion has increased external surface area on unit length; Simultaneously, because the cross section of spiral flat tube is the flat tube shape, the distance of tube hub and tube wall obviously reduces with respect to pipe, distance between the heat exchanging fluid outside tube hub place and the tube wall is reduced, thereby overcome straight tube, spiral coil and comprised the finned heat-exchanger rig heat exchange inequality of straight tube, the problem of heat exchange weak effect.
All adopt at finned heat exchanger and heat exchanger with oblate under the situation of identical heat exchange volume or heat exchange area, the heat exchanger with oblate of distortion has the better coefficient of heat transfer and uniform heat exchange property, heat exchange better effects if than finned heat exchanger.
Description of drawings
Fig. 1 is the overall structure schematic diagram according to the burner with spiral flat tube self-preheating device of the utility model embodiment;
Fig. 2 is an A-A place cross-section structure among Fig. 1;
Fig. 3 is the stereochemical structure according to the heat exchanger tube of the utility model embodiment;
Fig. 4 is the main TV structure according to the heat exchanger tube of the utility model embodiment.
The drawing reference numeral explanation:
1, fuel gas inlet 2, treat preheating gas inlet 3, exhanst gas outlet 4, burner jacket tube
5, spiral flat tube 6, collection chamber 7, exhaust gas nozzle 8, ignitor
9, combustion chamber 10, burner inner sleeve 11, smoke chamber
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model.
As shown in figures 1 and 3, according to the spiral flat tube 5 of heat exchanger tube for twisting of the utility model embodiment, described spiral flat tube 5 comprises that the cross section is the spiral flat tube main body 51 of flat tube shape.Heat exchanger tube of the present utility model can be applied to fluid heat exchange field, comprises the heat exchange between gas converting heat, liquid heat exchange and the gas-liquid.For example, the utility model can be used for burner, can also be used for the heat exchanger in the boiler.
As shown in Figure 3, described spiral flat tube 5 also comprises the spiral flat tube end 53 that is connected with described spiral flat tube main body 51, and the cross section of described spiral flat tube end 53 is circular, is convenient to connect with other parts of burner.
As shown in Figures 2 and 3, the cross section of described spiral flat tube 5 is an ellipticity, and the ratio of described elliptoid short major axis for example is 0.15,0.18,0.20,0.22,0.24,0.25 smaller or equal to 0.25.Heat transfer coefficient reduces along with the width of spiral flat tube 5 and increases, and therefore, the ratio of short major axis is more little, and then the coefficient of heat transfer is high more.For many-sided considerations such as heat exchange, making, the ratio of the short major axis of spiral flat tube 5 is as being 0.15,0.18,0.20,0.22,0.24,0.25.
The distortion of described spiral flat tube is compared more than or equal to 6 smaller or equal to 12.The distortion of spiral flat tube is than being S/D, for example, as shown in Figure 4, S is the single helix length after spiral flat tube twists through 360 degree, D is the diameter of the major axis of spiral flat tube, the distortion ratio of spiral flat tube also heat exchanging coefficient has bigger influence, twist bigger than more, heat exchange area is big more, the coefficient of heat transfer improves, but the flow resistance of spiral flat tube is also big more, and is excessive in order not make flow resistance, can obtain simultaneously the raising of spiral flat tube heat exchanging coefficient again, the utility model proposes distortion is between 6 to 12 than S/D.
Described spiral flat tube adopts and flattens and heat is turned round two one-step formings, or the employing chilling press utilizes the mould one-shot forming of colding pressing.
As shown in Figure 1, the utility model also provides the burner with spiral flat tube self-preheating device, and described burner comprises at least: smoke chamber 11; Hold the heat exchanger tube for the treatment of preheating gas, be arranged in the described smoke chamber, described heat exchanger tube is a spiral flat tube 5, treats that preheating gas can be air.Burner of the present utility model can use for direct naked light heating or the heating of indirec radiation pipe, as various metallurgical heat-treatment furnaces and heating furnace.
As shown in Figure 1, described burner also comprises: combustion chamber 9 that is communicated with described heat exchanger tube 5 and the Gas Pipe 7 that is communicated with described combustion chamber 9, described heat exchanger tube 5 is a combustion-aid air pipe.Air in the combustion-aid air pipe carries out primary combustion through entering into combustion chamber 9 after the heat exchange with the combustion gas of Gas Pipe 7.
As shown in Figure 1, described burner also comprises: be enclosed in the collection chamber 6 outside the described combustion chamber, have circumferential weld between described combustion chamber 9 and the described collection chamber 6; The air that a utility model part is preheated enters in the burner hearth by circumferential weld or in the radiant tube, can realize second-time burning.
Spiral flat tube can be parallel regularly arranged in order, be evenly distributed in the combustion chamber 9, to realize the air screw in the pipe, simultaneously also can realize managing the reverse screw of outer flue gas, thereby reach the purpose of high efficient heat exchanging, make self-preheating type combustor can in compact space, obtain higher air preheating temperature and lower smog discharge temperature.These energy-saving and emission-reduction for industrial heating furnace and heat-treatment furnace have great importance.
The collection chamber that described collection chamber 6 is made for refractory metal, the combustion chamber that make for silicon carbide ceramics described combustion chamber 9.Like this, both guaranteed that the combustion chamber can be high temperature resistant, and made also that collection chamber is anti-to collide with, and be convenient to transportation and install.
As shown in Figure 1, described burner also comprises: stretch into the ignitor 8 of described combustion chamber 9, to realize automatic igniting.
As shown in Figure 1, described smoke chamber 11 is formed by burner jacket tube 4 and burner inner sleeve 10, and smoke chamber 11 is the annular space that burner jacket tube 4 and burner inner sleeve 10 form.Combustion chamber 9 and described collection chamber 6 are arranged on an end of described burner inner sleeve, it among Fig. 1 right-hand member, described Gas Pipe 7 is an exhaust gas nozzle, coal gas is housed, fuel gas inlet 1 is to described Gas Pipe 7 delivery of fuel gas, Gas Pipe 7 and described ignitor 8 extend to described collection chamber 6 from the other end (left end the figure) of described burner inner sleeve 10, the side direction of described burner jacket tube 10 is respectively equipped with treats preheating gas inlet 2 and exhanst gas outlet 3, the described preheating gas inlet 2 treated is connected with described heat exchanger tube 5, and described exhanst gas outlet 3 is communicated with smoke chamber 11.Gas Pipe 7 and described ignitor 8 are arranged on the inner chamber of burner inner sleeve 10, smoke chamber 11 and heat exchanger tube 5 are arranged on the outside of burner inner sleeve 10, Gas Pipe 7 and described ignitor 8 burned device inner sleeves 10 are arranged on burner inner sleeve 10 with smoke chamber 11 and heat exchanger tube 5 keeps apart, make and burning and heat exchange mutually noninterfere have guaranteed safety.
Introduce the course of work of the present utility model below:
Combustion gas enters combustion chamber 9 from fuel gas inlet 1 through exhaust gas nozzle 7, combustion air, be generally cold air and enter the collection chamber 6 that heating resisting metal is made from treat that preheating gas inlet 2 gathers after 5 preheatings of multi-detector flat tube, wherein a part is carried out primary combustion after entering combustion chamber 9 and combustion gas mixing, spray in the stove with higher speed again or in the radiant tube, another part participates in second-time burning from the ejection of the circumferential weld between collection chamber and the combustion chamber.Cryogenic air in the smoke chamber 11 that high-temperature flue gas then constitutes from burner jacket tube 4 and burner inner sleeve 10 in the adverse current preheating spiral flat tubes 5 is discharged from exhanst gas outlet 3 then.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.For each part of the present utility model can make up under the condition of not conflicting mutually; any those skilled in the art; equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (10)
1. a heat exchanger tube is characterized in that, described heat exchanger tube is the spiral flat tube of distortion, and described spiral flat tube comprises that the cross section is the spiral flat tube main body of flat tube shape.
2. heat exchanger tube as claimed in claim 1 is characterized in that, described spiral flat tube also comprises the spiral flat tube end that is connected with described spiral flat tube main body, and the cross section of described spiral flat tube end is circular.
3. heat exchanger tube as claimed in claim 1 is characterized in that, the cross section of described spiral flat tube is an ellipticity, and the ratio of described elliptoid short major axis is smaller or equal to 0.25.
4. heat exchanger tube as claimed in claim 1 is characterized in that, the distortion of described spiral flat tube is compared more than or equal to 6 smaller or equal to 12.
5. heat exchanger tube as claimed in claim 1 is characterized in that, described spiral flat tube adopts and flattens and heat is turned round two one-step formings, or the employing chilling press utilizes the mould one-shot forming of colding pressing.
6. the burner with spiral flat tube self-preheating device is characterized in that, described burner comprises at least:
Smoke chamber;
Hold the heat exchanger tube for the treatment of preheating gas, be arranged in the described smoke chamber, described heat exchanger tube is each described heat exchanger tube in the claim 1 to 5.
7. the burner with spiral flat tube self-preheating device as claimed in claim 6 is characterized in that, described burner also comprises: combustion chamber that is communicated with described heat exchanger tube and the Gas Pipe that is communicated with described combustion chamber, described heat exchanger tube is a combustion-aid air pipe.
8. the burner with spiral flat tube self-preheating device as claimed in claim 7 is characterized in that, described burner also comprises: be enclosed in the collection chamber outside the described combustion chamber, have circumferential weld between described combustion chamber and the described collection chamber; Described heat exchanger tube is many rows, has at least row's heat exchanger tube to be communicated with described collection chamber.
9. the burner with spiral flat tube self-preheating device as claimed in claim 8, it is characterized in that, described collection chamber is the collection chamber that refractory metal is made, and described combustion chamber is the combustion chamber that silicon carbide ceramics is made, and described burner also comprises: the ignitor that stretches into described combustion chamber.
10. the burner with spiral flat tube self-preheating device as claimed in claim 9, it is characterized in that, described smoke chamber is formed by burner jacket tube and burner inner sleeve, described combustion chamber and described collection chamber are arranged on an end of described burner inner sleeve, described Gas Pipe is an exhaust gas nozzle, described Gas Pipe and described ignitor extend to described collection chamber from the other end of described burner inner sleeve, the side direction of described burner jacket tube is respectively equipped with treats preheating gas inlet and exhanst gas outlet, the described preheating gas inlet for the treatment of is connected with described economizer bank, and described exhanst gas outlet is communicated with smoke chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200889629U CN201983678U (en) | 2011-03-30 | 2011-03-30 | Heat exchange tube and combustor with spiral flat tube self-preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200889629U CN201983678U (en) | 2011-03-30 | 2011-03-30 | Heat exchange tube and combustor with spiral flat tube self-preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201983678U true CN201983678U (en) | 2011-09-21 |
Family
ID=44611137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200889629U Expired - Lifetime CN201983678U (en) | 2011-03-30 | 2011-03-30 | Heat exchange tube and combustor with spiral flat tube self-preheating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201983678U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183165A (en) * | 2011-03-30 | 2011-09-14 | 中冶京诚工程技术有限公司 | Heat exchange tube and combustor with spiral flat tube self-preheating device |
| CN103939903A (en) * | 2014-04-01 | 2014-07-23 | 西安交通大学 | Efficient counter-distributary self-preheating low-NOx combustion device |
-
2011
- 2011-03-30 CN CN2011200889629U patent/CN201983678U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183165A (en) * | 2011-03-30 | 2011-09-14 | 中冶京诚工程技术有限公司 | Heat exchange tube and combustor with spiral flat tube self-preheating device |
| CN103939903A (en) * | 2014-04-01 | 2014-07-23 | 西安交通大学 | Efficient counter-distributary self-preheating low-NOx combustion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |