CN101666502A - Heat exchanger in self-preheating burner - Google Patents
Heat exchanger in self-preheating burner Download PDFInfo
- Publication number
- CN101666502A CN101666502A CN200910209559A CN200910209559A CN101666502A CN 101666502 A CN101666502 A CN 101666502A CN 200910209559 A CN200910209559 A CN 200910209559A CN 200910209559 A CN200910209559 A CN 200910209559A CN 101666502 A CN101666502 A CN 101666502A
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- China
- Prior art keywords
- heat exchanger
- foam metal
- sleeve
- porous foam
- flue gas
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- 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
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- Coating By Spraying Or Casting (AREA)
Abstract
The invention aims at overcoming the defect of the existing heat exchanger in the self-preheating burner and provides a novel heat exchanger which can obviously improve the radiating and heat-exchanging performances at the flue gas side, increase the convection and heat-exchanging coefficient of the flue gas side and the air side and improve the heat exchanging efficiency. Furthermore, the heat exchanger has simple structure and simple and convenient processing and manufacturing, and can conveniently clean the dirt on the surface of the heat exchanger and replace an enhanced heat-exchanging element (namely a foam metal). The technical scheme for solving the technical problem is characterized in that the heat exchanger is an annular sleeve structure; the annular sleeve structure adopts a polished pipe that comprises an internal layer sleeve, an interlayer sleeve and an external layer sleeve; the internal layer sleeve and the interlayer sleeve compose an air annular seam; the interlayersleeve and the external layer sleeve compose a flue gas annular seam; the air annular seam and the flue gas annular seam are filled with porous foam metals; and the porous foam metal is an opening structure. The heat exchanger has simple structure, low manufacturing cost and easy maintenance, improves the using effect of the burner, and prolongs the service life of the burner.
Description
Technical field
The present invention relates to the heat exchanger in a kind of self-preheating burner.
Background technology
Self-preheating burner is by forming from preheating burner, smoke reflux device and heat exchanger.Heat exchanger is the critical component that improves self-preheating burner efficiency of combustion and heat utilization ratio.The effect of heat exchanger is the waste heat that reclaims high-temperature flue gas, is used for warm-up combustion-supporting air or coal gas, and the heat that reclaims is returned in the burner, play fuel savings, improve ignition temperature, improve combustion position, improve Btu utilization efficient, so it is the critical elements of these burner energy-saving and emission-reduction.
At present, the heat exchanger of this type burner mostly adopts pipe wing or rib structure to strengthen heat exchange, but it can only increase the convection transfer rate and the heat exchange area of tube wall, and is very little to the radiation heat transfer performance effect that strengthens flue gas; Along with the increase of service time, owing to surperficial its heat exchange efficiency of dirt deposition will descend to some extent, and not easy to clean and replacing.
Foam metal is a kind of novel low-density functional structure material, has that bulk density is little, relative mass is light, specific area is big, than characteristics such as mechanics performance height, damping capacity be good.The notable feature of foam metal is that its inside has a large amount of holes, according to the branch that whether is linked with open-celled structure and hole-closing structure between each hole.Because the foam metal of open-celled structure has bigger accessible surface long-pending, higher hole wall pyroconductivity and smaller volume specific heat capacity, thereby makes it possess superior heat transfer potential, can successfully be applied to heat-exchanger rigs such as heat exchanger.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiency of heat exchanger in the existing self-preheating burner, a kind of radiation heat transfer performance that can significantly improve fume side is provided, increase the convection transfer rate of fume side and air side, improve the new type heat exchanger of the heat exchange efficiency of heat exchanger, and it is simple in structure, processing and manufacturing is easy, and can clear up the heat exchanger surface dirt easily and change the enhanced heat exchange element is foam metal.
The technical solution adopted for the present invention to solve the technical problems is: described heat exchanger is the circular seam type sleeve structure, and the circular seam type sleeve pipe adopts light pipe, comprises inner layer sleeve, interlayer sleeve pipe and outer layer sleeve; Described inner layer sleeve and interlayer sleeve pipe are formed the air circumferential weld, and described interlayer sleeve pipe and outer layer sleeve are formed the flue gas circumferential weld; Filling porous foam metal in described air circumferential weld and the flue gas circumferential weld, described porous foam metal is an open-celled structure.
Technique scheme can further be improved to: the porous foam metal that described flue gas circumferential weld is filled is resistant to elevated temperatures porous foam metal, and high temperature resistant limiting value is 1000～1400 ℃; The porous foam metal heat-resistant limit value that described air circumferential weld is filled is 500～700 ℃.
Technique scheme can further be improved to: described porous foam metal can carry out coating surface by plasma spray technology to be handled, and sprayed on material is metal or pottery, to improve its blackness and radiance.
Technique scheme can further be improved to: described foam metal is that titanium is foam metal, blister steel or the foamed aluminium of matrix.
The invention has the beneficial effects as follows, improve the Btu utilization efficient of the heat exchange efficiency and the fuel of burner heat exchanger greatly; Simple in structure, low cost of manufacture is easy to safeguard, and result of use and the service life that can improve burner.
Description of drawings
Fig. 1 is the self-preheating burner structural representation.
Fig. 2 is the A-A schematic cross-section of the utility model heat exchanger.
The specific embodiment
Fig. 1 is applied to the self-preheating burner structural representation for the utility model.This self-preheating burner is by forming from preheating burner 1, smoke reflux device 2 and heat exchanger.Wherein heat exchanger is the circular seam type sleeve structure, and the circular seam type sleeve pipe adopts light pipe, comprises inner layer sleeve 3, interlayer sleeve pipe 4 and outer layer sleeve 5, and as shown in Figure 2, wherein inner layer sleeve 3 is formed the air circumferential weld with interlayer sleeve pipe 4, and normal temperature air spontaneous combustion device flows into outward; Described interlayer sleeve pipe 4 is formed the flue gas circumferential weld with outer layer sleeve 5, and the indoor outflow of high-temperature flue gas spontaneous combustion at the porous foam metal 6 of described air circumferential weld filling open-celled structure, is also filled the porous foam metal 6 of open-celled structure in described flue gas circumferential weld.Flue gas and air carry out heat exchange by the circular seam type heat exchanger, reach to reclaim the purpose that fume afterheat is used for preheated air.
In the fume side circumferential weld, fill resistant to elevated temperatures porous foam metal (about 1000～1400 ℃ of flue-gas temperature peak, relevant with the burner environment for use), because porous foam metal has bigger accessible surface long-pending, higher blackness and smaller volume specific heat capacity, will increase substantially the global radiation ability of fume side, the radiation heat transfer amount will double above according to a preliminary estimate, have higher heat conductivity owing to increased the disturbance and the porous foam metal of air-flow, convection transfer rate also can increase to some extent than rib structure; In the air side circumferential weld, fill heat-resisting porous foam metal (about 500～700 ℃ of air preheating temperature peak, relevant), can significantly improve the equivalent heat conductivity and the heat convection effect of air side with the flue gas maximum temperature value.Comprehensive heat exchange efficiency through primary Calculation burner heat exchanger improves 20～30%.Because it is simple in structure, processing and manufacturing is relatively easy, and can dismantle, change foam metal and cleaning heat exchange surface dirt easily.
Described porous foam metal can obtain by methods such as model casting, deposition or solid frameworks.Can be that titanium is foam metal, blister steel or the foamed aluminium of matrix.The preferred resistant to elevated temperatures porous foam metal of porous foam metal that the flue gas circumferential weld is filled, high temperature resistant limiting value is 1000～1400 ℃; The porous foam metal heat-resistant limit value that the air circumferential weld is filled is 500～700 ℃.
There is the hole of supplied gas medium circulation foam metal inside, and the diameter of preferred hole is tens microns to several millimeters not to be waited, and is provided with the concrete application need of burner.Its material can be identical with heat exchange tube material, also can adopt and the heat exchange tube material different kinds of metals.The porous foam metal of filling in the fume side circumferential weld can also carry out coating surface by plasma spray technology to be handled, to improve its blackness and radiance.Thermal spraying is a kind of sufacing that utilizes the powder of fusing or wire rod to realize, the material that sprays fusing by gas quickens and is transported on the surface that needs to apply.The energy of fusing can be electric arc or inert gas plasma.Sprayed on material can be metal or pottery.
Claims (5)
1, the heat exchanger in a kind of self-preheating burner is characterized in that: described heat exchanger is the circular seam type sleeve structure, and the circular seam type sleeve pipe adopts light pipe, comprises inner layer sleeve, interlayer sleeve pipe and outer layer sleeve;
Described inner layer sleeve and interlayer sleeve pipe are formed the air circumferential weld, and described interlayer sleeve pipe and outer layer sleeve are formed the flue gas circumferential weld; Filling porous foam metal in described air circumferential weld and the flue gas circumferential weld, described porous foam metal is an open-celled structure.
2, the heat exchanger in a kind of self-preheating burner according to claim 1 is characterized in that: the porous foam metal that described flue gas circumferential weld is filled is resistant to elevated temperatures porous foam metal, and high temperature resistant limiting value is 1000～1400 ℃;
3, the heat exchanger in a kind of self-preheating burner according to claim 1 and 2 is characterized in that: the porous foam metal that described air circumferential weld is filled is resistant to elevated temperatures porous foam metal, and high temperature resistant limiting value is 500～700 ℃.
4, the heat exchanger in a kind of self-preheating burner according to claim 3 is characterized in that: described porous foam metal can carry out coating surface by plasma spray technology to be handled, and sprayed on material is metal or pottery, to improve its blackness and radiance.
5, the heat exchanger in a kind of self-preheating burner according to claim 4 is characterized in that: described foam metal is that titanium is foam metal, blister steel or the foamed aluminium of matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910209559A CN101666502A (en) | 2009-10-29 | 2009-10-29 | Heat exchanger in self-preheating burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910209559A CN101666502A (en) | 2009-10-29 | 2009-10-29 | Heat exchanger in self-preheating burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101666502A true CN101666502A (en) | 2010-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910209559A Pending CN101666502A (en) | 2009-10-29 | 2009-10-29 | Heat exchanger in self-preheating burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101666502A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230626A (en) * | 2011-06-02 | 2011-11-02 | 中冶京诚工程技术有限公司 | Transverse baffle and flat pipe type self-preheating burner |
| CN106838901A (en) * | 2017-02-27 | 2017-06-13 | 海湾环境科技（北京）股份有限公司 | Burner |
| WO2020122841A3 (en) * | 2018-12-13 | 2021-01-07 | Fabem Isi Makine Sanayi Ve Ticaret Ltd. Sti. | A pre-heat heat exchanger with multi-wall which leads the water |
-
2009
- 2009-10-29 CN CN200910209559A patent/CN101666502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230626A (en) * | 2011-06-02 | 2011-11-02 | 中冶京诚工程技术有限公司 | Transverse baffle and flat pipe type self-preheating burner |
| CN102230626B (en) * | 2011-06-02 | 2013-05-01 | 中冶京诚工程技术有限公司 | Transverse baffle and flat pipe type self-preheating burner |
| CN106838901A (en) * | 2017-02-27 | 2017-06-13 | 海湾环境科技（北京）股份有限公司 | Burner |
| CN106838901B (en) * | 2017-02-27 | 2023-09-01 | 海湾环境科技（北京）股份有限公司 | Burner with a burner body |
| WO2020122841A3 (en) * | 2018-12-13 | 2021-01-07 | Fabem Isi Makine Sanayi Ve Ticaret Ltd. Sti. | A pre-heat heat exchanger with multi-wall which leads the water |
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Application publication date: 20100310 |