CN101936540A - Heat exchanger matched with radiant-tube burner for use - Google Patents
Heat exchanger matched with radiant-tube burner for use Download PDFInfo
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- CN101936540A CN101936540A CN2010102995088A CN201010299508A CN101936540A CN 101936540 A CN101936540 A CN 101936540A CN 2010102995088 A CN2010102995088 A CN 2010102995088A CN 201010299508 A CN201010299508 A CN 201010299508A CN 101936540 A CN101936540 A CN 101936540A
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- heat exchanger
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- smoke gas
- exchanger tube
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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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Abstract
The invention relates to a heat exchanger matched with a radiant-tube burner for use, wherein a smoke gas return piece is fixedly arranged between a transverse heat exchange tube and a sealing guide head, one end of a core tube is fixedly connected with a preheated air outlet, the other end thereof is connected with the smoke gas return piece, a smoke gas suction inlet is arranged at the peripheral part of the smoke gas return piece, and a connecting port communicated with the core tube and a return air inlet connected with the sealing guide head are respectively arranged at both end parts. The invention has simple structure; the smoke gas return piece is added to the heat exchanger, a smoke gas passage is communicated with the core tube, and smoke gas is entrained through a negative-pressure area formed through air high-speed jet, so that the smoke gas is mixed with preheated air; on the basis of the effective heat exchange of the heat exchanger, the air preheating temperature can be increased by more than 100 DEG C; and meanwhile, after the smoke gas is mixed with the air, the oxygen content in combustion air is reduced, the generation of a local high-temperature area is avoided, the NOx production amount is greatly decreased, and the discharge amount of pollutants is reduced.
Description
Technical field
The present invention relates to a kind of heat-exchanger rig, relate in particular to and relate to the heat-exchanger rig that a kind of and the supporting use of radiation pipe burner tip, warm-up combustion-supporting air are used.
Background technology
At present, in metal heat treatmet, material thawing etc. required than higher industry to product quality, traditional mode of heating had been difficult to satisfy technological requirement, and the radiation pipe burner tip mode of heating has obtained promotion and application widely.In order to improve efficiency of combustion, these burners mostly are furnished with heat exchanger and come warm-up combustion-supporting air.Usually the form of radiation pipe burner tip heat exchanger mainly contains two kinds: (1) and the matching used heat exchanger of suction-type radiant tube, heat exchanger are adopted in the heat exchanger tube inboard more or the outside strengthens the heat exchange effect with fin or the mode that adds pitted skin on the heat exchanger tube surface.This heat exchanger air flow resistance loss is little, but heat exchange efficiency is lower, and under 1000 ℃ flue-gas temperature, air only can be preheating to 350-400 ℃, and smoke evacuation is more than 650 ℃; (2) with blast the matching used heat exchanger of formula radiant tube, this heat exchanger adopts the jet flow stroke to add the structural shape of finned tube more, promptly the heat exchanger outer tube is provided with finned tube, interior pipe adopts the multiple-pass jet structure to improve the heat exchange effect.This heat exchanger air flow resistance loss is big, need bigger air feed pressure, but heat exchange efficiency is higher, and under 1000 ℃ flue-gas temperature, air can be preheating to more than 500 ℃, and exhaust gas temperature drops to below 600 ℃.Under existing heat exchanger structure and heat exchange mode, want significantly to improve air preheating temperature, very difficult, and also existing main flow radiant tube heat exchanger only is a warm-up combustion-supporting air in the function design, improve combustion efficiency, reducing not do in the pollutant emission consideration.
Summary of the invention
The present invention is in order to overcome the deficiencies in the prior art, and provides a kind of simple in structure, can significantly improve the combustion air preheat temperature, simultaneously, can also improve combustion efficiency, reduce radiation pipe burner tip NOx discharge capacity with the matching used heat exchanger of radiation pipe burner tip.
The technical solution used in the present invention:
It comprises heat exchanger shell, heat exchanger shell inside is provided with vertical heat exchanger tube, in the vertical heat exchanger tube is the combustion air passage, form exhaust gases passes between vertical heat exchanger tube and the heat exchanger shell, exhaust gases passes is provided with smoke exhaust pipe, the heat exchanger shell top is provided with air inlet passageway, be provided with the air throttle pipe in the vertical heat exchanger tube, heat exchanger shell bottom one side is connected with the preheated air outlet, the heat exchanger shell bottom other end is fixed with radiant tube, radiant tube inside is provided with the core pipe, be provided with horizontal heat exchanger tube between radiant tube and the core pipe, laterally heat exchanger tube one end and heat exchanger shell are connected, the other end is provided with the sealing guide head, radiant tube and laterally space between the heat exchanger tube and exhaust gases passes perforation, laterally space between heat exchanger tube and the core pipe and combustion air passage connect, laterally be installed with smoke backflow spare between heat exchanger tube and the sealing guide head, described core Guan Yiduan and preheated air outlet are connected, other end smoke backflow spare links to each other, described smoke backflow spare perimembranous is provided with the flue gas suction inlet, and two ends are respectively equipped with connectivity port that communicates with the core pipe and the return air inlet that links to each other with the sealing guide head.
Above-mentioned return air inlet is the taper circular hole.Be provided with the air throttle pipe in the above-mentioned vertical heat exchanger tube.
The part that above-mentioned core pipe is positioned at heat exchanger shell inside is a bellows.
Above-mentioned flue gas suction inlet is provided with 4, is evenly distributed on smoke backflow spare perimembranous.
The technique effect that the present invention obtains:
1, the present invention is simple in structure, and heat exchanger adds smoke backflow spare, and exhaust gases passes is communicated with the core pipe, the negative pressuren zone that forms by the air high velocity jet entrainments flue gas, flue gas is mixed with preheated air, on the basis of the effective heat exchange of heat exchanger tube, air preheating temperature can be improved more than 100 ℃, simultaneously, flue gas has reduced the oxygen content in the combustion air with after air mixes, and has avoided the generation in localized hyperthermia district, the NOx growing amount reduces significantly, has reduced the discharge capacity of pollutant;
2, the air throttle pipe setting, improved the flowing velocity of air in heat exchanger tube, strengthened the heat exchange effect;
3, the return air inlet is set to the taper circular hole, has improved the speed of combustion air ejection, has reduced the drag losses that flows.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is that the C of Fig. 1 is to view;
Fig. 3 is the cutaway view of Fig. 1 at the B-B place
The matching used structural representation of Fig. 4 and radiation pipe burner tip.
Among the figure: 1-seals guide head, 2-smoke backflow spare, 3-core pipe, the horizontal heat exchanger tube of 4-, 5-combustion air passage, 6-exhaust gases passes, the 7-heat exchanger shell, the outlet of 8-preheated air, 9-smoke exhaust pipe, 10-air throttle pipe, 11-air inlet passageway, 12-bellows, 13-master's burner, 14-radiant tube, the vertical heat exchanger tube of 15-, 16-flue gas suction inlet, 17-connectivity port, 18-return air inlet.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are described further.
Referring to Fig. 1-3, a kind of and the matching used heat exchanger of radiation pipe burner tip, it comprises heat exchanger shell 7, housing can also can be split type for monoblock type, preferably housing can be provided with split type in order to upgrade convenient disassembly, comprise two parts up and down, connect by flange between two parts, heat exchanger shell inside is provided with vertical heat exchanger tube 15, in the vertical heat exchanger tube is combustion air passage 5, forms exhaust gases passes 6 between vertical heat exchanger tube and the heat exchanger shell, and exhaust gases passes is provided with smoke exhaust pipe 9, the heat exchanger shell top is provided with air inlet passageway 11, be provided with air throttle pipe 10 in the vertical heat exchanger tube, heat exchanger shell bottom one side is connected with preheated air outlet 8, and the heat exchanger shell bottom other end is fixed with radiant tube 14, radiant tube inside is provided with core pipe 3, and the part that described core pipe is positioned at heat exchanger shell inside is a bellows 12.Be provided with horizontal heat exchanger tube 4 between radiant tube and the core pipe, laterally heat exchanger tube one end and heat exchanger shell are connected, the other end is provided with sealing guide head 1, radiant tube and laterally space between the heat exchanger tube and exhaust gases passes perforation, laterally space between heat exchanger tube and the core pipe and combustion air passage connect, laterally be installed with smoke backflow spare 2 between heat exchanger tube and the sealing guide head, it adopts the heat resisting steel casting, described core Guan Yiduan and preheated air outlet are connected, other end smoke backflow spare links to each other, described smoke backflow spare perimembranous is provided with equally distributed 4 circular flue gas suction inlets 16, certainly the number of flue gas suction inlet is also not necessarily 4, and it can own as required setting.Two ends are respectively equipped with connectivity port 17 that communicates with the core pipe and the return air inlet 18 that links to each other with the sealing guide head, and described return air inlet is chosen as the taper circular hole.The part that the core pipe is positioned at heat exchanger shell inside is a bellows, the thermal stress that produces when being used to reduce pipe expansion.
Whole heat exchanger is divided into two strokes up and down, the stroke of up stroke for moving up and down at heat exchanger shell, and down stroke is the backflow stroke of level.Smoke backflow spare 2 right-hand members are sealing guide head 1, and its shape can be selected hemispherical for use, and main rising seals and the preheated air guide effect.Laterally heat exchanger tube 4 and laterally heat exchanger tube 15 outsides employing pitted skin structure, the inboard is a fin structure, two ends are fixing with smoke backflow spare 2 and heat exchanger shell 7 welding respectively.Heat exchanger shell 7 is heat resisting steel casting double-decker, internal layer is a combustion air passage 5, two outlets are connected with vertical heat exchanger tube 15 with horizontal heat exchanger tube 4 heat exchanger are divided into two shape journeys up and down, and heat exchanger up stroke skin is an exhaust gases passes, flue gas is turned to send into smoke exhaust pipe 9; Core pipe 3 passes from the housing center with preheated air outlet 8 and is connected.Air throttle pipe 10 places the heat exchanger tube center, adopts the heat resisting steel welding fabrication, and spherical structure is adopted in the end, has reduced the air flow losses, has significantly dwindled the whole circulation of air sectional area of heat exchanger simultaneously, has improved the combustion air flow velocity.The heat exchanger up stroke heat exchanger tube outside is an exhaust gases passes, and exhaust gases passes is provided with smoke exhaust pipe 9, and smoke exhaust pipe 9 upper ends and air inlet passageway 11 and 4 welding of vertical heat exchanger tube are fixing.
Referring to Fig. 4, the outlet 8 of heat exchanger preheated air is connected with main burner 13 by bellows 12,7 mounting flange interface is fixedlyed connected with radiant tube 14 on the heat exchanger shell, laterally form exhaust gases passes between heat exchanger tube 4 and the radiant tube 14, flue gas is by the upwards operation of radiant tube 14 of main burner right-hand member, part of smoke is entrainmented to enter core pipe 3 and mixes with combustion air, another part and vertical heat exchanger tube 15 and horizontal heat exchanger tube 4 outer walls carry out heat exchange, pass to combustion air by vertical heat exchanger tube 15 and horizontal heat exchanger tube 4 inwalls and inner fin; Another part continues up discharging from smoke exhaust pipe 9.After combustion air enters from the flange of air intlet 11, through air throttle pipe 10 speed-raising back and vertical heat exchanger tube 15 and horizontal heat exchanger tube 4 heat exchange, then by smoke backflow spare 2 through sealing guide head 1 reflection rotation spraying into core pipe 3 at a high speed and to entrainment the flue gas that enters and fully mix, export 8 by preheated air and enter main burner 13 and burn.Because oxygen content significantly reduces in the combustion air, has avoided the generation in localized hyperthermia district during burning, the growing amount of NOx significantly reduces, and has reduced the discharge capacity of pollutant.
Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.
Claims (5)
1. with the matching used heat exchanger of radiation pipe burner tip, it comprises heat exchanger shell (7), heat exchanger shell inside is provided with vertical heat exchanger tube (15), vertical heat exchanger tube with interior be combustion air passage (5), form exhaust gases passes (6) between vertical heat exchanger tube and the heat exchanger shell, exhaust gases passes is provided with smoke exhaust pipe (9), the heat exchanger shell top is provided with air inlet passageway (11), heat exchanger shell bottom one side is connected with preheated air outlet (8), the heat exchanger shell bottom other end is fixed with radiant tube (14), radiant tube inside is provided with core pipe (3), be provided with horizontal heat exchanger tube (4) between radiant tube and the core pipe, laterally heat exchanger tube one end and heat exchanger shell are connected, the other end is provided with sealing guide head (1), radiant tube and laterally space between the heat exchanger tube and exhaust gases passes perforation, laterally space between heat exchanger tube and the core pipe and combustion air passage connect, it is characterized in that: laterally be installed with smoke backflow spare (2) between heat exchanger tube and the sealing guide head, described core Guan Yiduan and preheated air outlet are connected, other end smoke backflow spare links to each other, described smoke backflow spare perimembranous is provided with flue gas suction inlet (16), and two ends are respectively equipped with connectivity port (17) that communicates with the core pipe and the return air inlet (18) that links to each other with the sealing guide head.
2. according to claim 1 and the matching used heat exchanger of radiation pipe burner tip is characterized in that: described return air inlet is the taper circular hole.
3. according to claim 1 and 2 and the matching used heat exchanger of radiation pipe burner tip is characterized in that: be provided with air throttle pipe (10) in the described vertical heat exchanger tube.
4. according to claim 1 and 2 and the matching used heat exchanger of radiation pipe burner tip, it is characterized in that: the part that described core pipe is positioned at heat exchanger shell inside is a bellows.
5. according to claim 1 and 2 and the matching used heat exchanger of radiation pipe burner tip, it is characterized in that: described flue gas suction inlet is provided with 4, is evenly distributed on smoke backflow spare perimembranous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102995088A CN101936540B (en) | 2010-10-08 | 2010-10-08 | Heat exchanger matched with radiant tube burner for use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102995088A CN101936540B (en) | 2010-10-08 | 2010-10-08 | Heat exchanger matched with radiant tube burner for use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101936540A true CN101936540A (en) | 2011-01-05 |
| CN101936540B CN101936540B (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102995088A Expired - Fee Related CN101936540B (en) | 2010-10-08 | 2010-10-08 | Heat exchanger matched with radiant tube burner for use |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759109A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method |
| CN106225006A (en) * | 2016-08-31 | 2016-12-14 | 江苏华冶科技股份有限公司 | A kind of radial canal double heat exchanger |
| CN110864320A (en) * | 2019-10-31 | 2020-03-06 | 杭州中景科技有限公司 | Forced self-smoke-exhausting compact preheater |
| CN112524605A (en) * | 2020-12-04 | 2021-03-19 | 武汉科技大学 | Radiant tube capable of automatically sucking flue gas to realize flameless combustion |
| CN112524606A (en) * | 2020-12-04 | 2021-03-19 | 武汉科技大学 | Radiant tube burner capable of realizing flameless combustion by entraining smoke |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252807A (en) * | 1988-03-31 | 1989-10-09 | Hitachi Zosen Corp | Combustion method for radiant gas burner |
| US6190159B1 (en) * | 1999-03-03 | 2001-02-20 | Hauck Manufacturing Company | Method and apparatus for reducing nitrous oxides and CO emissions in a gas-fired recuperated radiant tube burner |
| KR20030052884A (en) * | 2001-12-21 | 2003-06-27 | 재단법인 포항산업과학연구원 | Recuperator type radiant tube for heat treatment furnace |
| JP2004093086A (en) * | 2002-09-04 | 2004-03-25 | Kanto Yakin Kogyo Co Ltd | Single end type combustion burner of heating furnace |
| CN2791499Y (en) * | 2005-04-30 | 2006-06-28 | 曾凤莲 | Injection radiant tube heat exchanger |
| CN201163160Y (en) * | 2007-12-19 | 2008-12-10 | 中冶南方(武汉)威仕工业炉有限公司 | Heat exchanger with inside and outside fins used with radiant tube burner |
| CN201582821U (en) * | 2009-12-29 | 2010-09-15 | 中冶南方(武汉)威仕工业炉有限公司 | Indirect radiant tube heating device |
| CN201811272U (en) * | 2010-10-08 | 2011-04-27 | 中冶南方(武汉)威仕工业炉有限公司 | Heat exchanger used together with radiant tube nozzle |
-
2010
- 2010-10-08 CN CN2010102995088A patent/CN101936540B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01252807A (en) * | 1988-03-31 | 1989-10-09 | Hitachi Zosen Corp | Combustion method for radiant gas burner |
| US6190159B1 (en) * | 1999-03-03 | 2001-02-20 | Hauck Manufacturing Company | Method and apparatus for reducing nitrous oxides and CO emissions in a gas-fired recuperated radiant tube burner |
| KR20030052884A (en) * | 2001-12-21 | 2003-06-27 | 재단법인 포항산업과학연구원 | Recuperator type radiant tube for heat treatment furnace |
| JP2004093086A (en) * | 2002-09-04 | 2004-03-25 | Kanto Yakin Kogyo Co Ltd | Single end type combustion burner of heating furnace |
| CN2791499Y (en) * | 2005-04-30 | 2006-06-28 | 曾凤莲 | Injection radiant tube heat exchanger |
| CN201163160Y (en) * | 2007-12-19 | 2008-12-10 | 中冶南方(武汉)威仕工业炉有限公司 | Heat exchanger with inside and outside fins used with radiant tube burner |
| CN201582821U (en) * | 2009-12-29 | 2010-09-15 | 中冶南方(武汉)威仕工业炉有限公司 | Indirect radiant tube heating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759109A (en) * | 2012-07-31 | 2012-10-31 | 中冶南方(武汉)威仕工业炉有限公司 | Air-coal gas preheating finned pipe type radiation pipe burner heat exchanger and heat exchange method |
| CN106225006A (en) * | 2016-08-31 | 2016-12-14 | 江苏华冶科技股份有限公司 | A kind of radial canal double heat exchanger |
| CN110864320A (en) * | 2019-10-31 | 2020-03-06 | 杭州中景科技有限公司 | Forced self-smoke-exhausting compact preheater |
| CN110864320B (en) * | 2019-10-31 | 2024-09-17 | 杭州中景科技有限公司 | Forced self-smoke-discharging compact preheater |
| CN112524605A (en) * | 2020-12-04 | 2021-03-19 | 武汉科技大学 | Radiant tube capable of automatically sucking flue gas to realize flameless combustion |
| CN112524606A (en) * | 2020-12-04 | 2021-03-19 | 武汉科技大学 | Radiant tube burner capable of realizing flameless combustion by entraining smoke |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101936540B (en) | 2012-04-25 |
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Granted publication date: 20120425 Termination date: 20161008 |
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