CN102252328A - Radiation tube heater - Google Patents
Radiation tube heater Download PDFInfo
- Publication number
- CN102252328A CN102252328A CN2011101881440A CN201110188144A CN102252328A CN 102252328 A CN102252328 A CN 102252328A CN 2011101881440 A CN2011101881440 A CN 2011101881440A CN 201110188144 A CN201110188144 A CN 201110188144A CN 102252328 A CN102252328 A CN 102252328A
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- Prior art keywords
- spout
- radiation tube
- nozzle
- radiant tube
- combustion
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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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- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention discloses a radiation tube heater, comprising a combustor and a radiation tube arranged in the front part of the combustor, wherein the combustor comprises a central nozzle arranged in the centre and a first nozzle surrounding the peripheral circumference of the central nozzle. The radiation tube heater is crucially characterized in that the radiation tube comprises a middle pipe, an upper pipe and a lower pipe, wherein the upper pipe and the lower pipe are symmetrically arranged; two ends of the upper pipe and the lower pipe are respectively connected to two ends of the middle pipe; the peripheral circumference of the first nozzle is further provided with a second nozzle and a third nozzle; the other ends of respective pipes of the second and the third nozzles are respectively provided with a second smoke port and a third smoke port, and the two pipes are internally and respectively provided with a heat accumulator. According to the heater disclosed by the invention, by combination with a heat accumulation combustion technology to effectively recover the waste heat of the smoke and obviously improve the thermal efficiency of the radiation tube, the high-temperature creep of the tube body is improved, the service life of the radiation tube is prolonged, the peak temperature of combustion flames is reduced, the temperature uniformity of the wall of the radiation tube is increased, and the emission of NOX is decreased.
Description
Technical field
The present invention relates to a kind of radiant tube heater.
Background technology
At present, needs such as metal heat treatmet use the firing equipment of protective atmosphere to use the radiation tube heater more, and particularly the combustion type radiant tube is widely used in continuous strip annealing furnace.In order to improve the thermal efficiency of radiant tube, late 1980s, people developed heat accumulation type radiant tube, because air preheating temperature significantly improves, thereby had improved the thermal efficiency of radiant tube greatly.But because traditional radiant tube body structure, as: U type and W type be to all restrictions of radiant tube performance, no matter is in combustion thermal efficiency, radiant tube service life, still in the problem that all exists aspect the discharging of pollutant more or less.
Summary of the invention
Content of the present invention provides the radiant tube heater that a kind of body surface temperature is even, combustion thermal efficiency is high and pollutant emission is low.
To achieve these goals, by the following technical solutions: a kind of radiant tube heater, comprise burner and the radiant tube that is arranged on the burner front portion, described burner comprises the center nozzle at the center of being arranged on and around first spout that is arranged on the center nozzle peripheral circumferential, it is characterized in that: described radiant tube has intermediate conduit, symmetrically arranged pipeline and the following pipeline gone up, and the two ends of last pipeline and following pipeline connect the two ends that are connected to intermediate conduit respectively;
Also be provided with second spout and the 3rd spout on the peripheral circumferential of first spout, second spout and the 3rd the spout other end of pipeline separately are respectively arranged with the second flue gas mouth and the 3rd flue gas mouth, and are provided with heat storage in two pipelines.
In order to make sufficient combustion, the quantity of described second spout and the 3rd spout equates, is provided with at interval, and second spout and the 3rd spout can be respectively as combustion air spout and smoke evacuation inlet or smoke evacuation inlet and combustion air spouts.
Beneficial effect of the present invention is:
(1) this radiant tube is owing to the bend pipe structure of its inlet end, and the backflow flue gas participates in burns recirculated, makes this radiant tube have the tube wall temperature good uniformity, the advantage that pollutant discharge amount is low;
(2) owing to the symmetrical structure of radiant tube, body creep resistance ability is improved significantly, the service life of significant prolongation radiant tube, the stability and the reliability of raising device;
(3) the present invention is simple in structure, and cost is lower;
(4) whole heater adopts the form of air classification burning, has reduced the central temperature and the NO of combustion flame
XDeng pollutant emission.
In sum, the present invention can combusting low calorific value gas fuel or other fuel gas, and reclaims fume afterheat efficiently, combustion air is preheating to higher temperature, thereby significantly improves the thermal efficiency of radiant tube; The exclusive symmetrical structure of radiant tube can improve the creep effect that brings owing to body high temperature effectively, thereby improves the service life of radiant tube, saves cost; In addition, can increase the inner loop amount of flue gas significantly, thereby reduce the peak temperature of combustion flame, improve the temperature uniformity of radiation tube wall, reduce NO by reasonable adjusting draft
XDischarging Deng pollutant.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of burner among Fig. 1;
Fig. 3 is the profile of A-A among Fig. 2.
Among the figure, part 1 is a center nozzle, and part 2 is second spout, part 3 is the 3rd spout, and part 4 is a burner, and part 5 is the backflow flue gas, part 6 is a flue gas recycled, and part 7 is a radiant tube, and part 7-1 is an intermediate conduit, part 7-2 is last pipeline, part 7-3 is following pipeline, and part 8 is a heat storage, and part 9 is the 3rd flue gas mouth, part 10 is the second flue gas mouth, and part 11 is first spout.
The specific embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 to Figure 3, radiant tube 7 is made up of intermediate conduit 7-1, last pipeline 7-2 and following pipeline 7-3, and intermediate conduit 7-1 is a straight tube, and last pipeline 7-2 and following pipeline 7-3 are bend pipe, itself and intermediate conduit 7-1 junction are welding, and are fixed to the outer wall of furnace wall by flange; Burner 4 is connected on the radiant tube 7 by welding or flange, and diameter requires to be not more than the diameter of radiant tube 7; Center nozzle 1 is positioned at the center of burner, and first spout 11 is positioned on the excircle of center nozzle 1.
The gas that center nozzle 1 is sprayed is fuel gas with low heat value or other gaseous fuel of normal temperature, and the gas that first spout 11 sprays is the air of normal temperature.Certainly, as another form, the gas that center nozzle 1 is sprayed also can be the air of normal temperature, and the gas that first spout 11 sprays is fuel gas with low heat value or other gaseous fuel of normal temperature.
Stable for what guarantee to burn, second spout 2 and the 3rd spout 3 alternately are arranged in around center nozzle 1 on the exterior periphery of first spout 11, and its second spout 2 equates with the quantity of the 3rd spout 3, and are complementary with heat storage independently respectively.The normal temperature auxiliary air is entered by the 3rd flue gas mouth 9, can surpass 1000 ℃ through temperature after the preheating of heat storage 8, and high temperature combustion air and combustion gas are fully burnt and with heat transferred radiation tube wall.The high-temperature flue gas that the burning back produces enters heat storage 8 and carries out accumulation of heat, after temperature reduces, is discharged by the second flue gas mouth 10 by second spout.Wherein combustion gas does not commutate from start to finish, and the alternately commutation of combustion air and flue gas, promptly second spout 2 and the 3rd spout 3 periodically exchange the role.
During work, at first combustion gas mixes in small-sized combustion chamber with primary air, light after-combustion through burning torch, combustion product gases carries out mixed combustion with the high temperature air after the heat storage preheating that second spout 2 sprays again then, high-temperature combustion gas in radiant tube 7 along with combustion reaction becomes backflow flue gas 5, part backflow flue gas 5 enters the 3rd spout 3 and is used for the preheating heat storage under the effect of smoke evacuation draft, another part backflow flue gas 5 participates in combustion processes, is flue gas recycled 6.Through the time of one-period, commutate, second spout 2 of last one-period and the 3rd spout 3 become smoke evacuation inlet and combustion air spout respectively in this cycle, and so repeatedly, the exothermic effects of holding by heat storage 8 reclaims fume afterheat and warm-up combustion-supporting air.Because burner arrangement and exclusive bend pipe structure, a return flue gas part enters the smoke evacuation port and is used for heating heat storage under the effect of smoke evacuation draft, another part flue gas participates in the combustion process, form the recirculation of inner flue gas, this is for the temperature that reduces the combustion zone flame of centre, prolong the length of flame, reduce NO
XHas important function Deng pollutant emission.
The present invention is applied to the heat accumulating type technology in the radiant tube of unique cast, form the high-temperature low-oxygen environment in the combustion zone by its distinctive bend pipe return-flow structure, thereby the reactant concentration in dilute combustion zone significantly reduces the central temperature of combustion flame, reaches and reduces NO significantly
XThe purpose of discharging effectively improves the performance of heat accumulation type radiant tube heater; The radiant tube of simultaneously two P shape symmetric arrangement provides bigger radiation surface area, has improved to add thermal effect, symmetrical structure is also eliminated creep stress, improve body intensity and service life, and can realize installation and removal easily, significantly improved the stability and the reliability of system.The present invention can be widely used on the Thermal Equipment that industries such as various metallurgy, chemical industry, machinery are not easy to naked light heating.
Claims (2)
1. radiant tube heater, comprise burner (4) and be arranged on the anterior radiant tube (7) of burner (4), described burner (4) comprises the center nozzle (1) at the center of being arranged on and around first spout (11) that is arranged on center nozzle (1) peripheral circumferential, it is characterized in that: described radiant tube (7) has intermediate conduit (7-1), symmetrically arranged pipeline (7-2) and the following pipeline (7-3) gone up, and the two ends of last pipeline (7-2) and following pipeline (7-3) connect the two ends that are connected to intermediate conduit (7-1) respectively;
Also be provided with second spout (2) and the 3rd spout (3) on the peripheral circumferential of first spout (11), second spout (2) and the 3rd spout (3) other end of pipeline separately are respectively arranged with the second flue gas mouth (10) and the 3rd flue gas mouth (9), and are provided with heat storage (8) in two pipelines.
2. radiant tube heater as claimed in claim 1, it is characterized in that: the quantity of described second spout (2) and the 3rd spout (3) equates, be provided with at interval, second spout (2) and the 3rd spout (3) can be respectively as combustion air spout and smoke evacuation inlet or smoke evacuation inlet and combustion air spouts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101881440A CN102252328A (en) | 2011-07-06 | 2011-07-06 | Radiation tube heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101881440A CN102252328A (en) | 2011-07-06 | 2011-07-06 | Radiation tube heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102252328A true CN102252328A (en) | 2011-11-23 |
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ID=44979767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101881440A Pending CN102252328A (en) | 2011-07-06 | 2011-07-06 | Radiation tube heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102252328A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563654A (en) * | 2012-02-25 | 2012-07-11 | 佛山市科皓燃烧设备制造有限公司 | Self-heat storage type gas burner |
| CN103697476A (en) * | 2013-12-22 | 2014-04-02 | 北京科技大学 | Flat double P type radiant tube |
| CN110094733A (en) * | 2019-05-30 | 2019-08-06 | 武汉汇翔热工技术有限公司 | A kind of radiant tube low NOx combustion system based on Researched of Air Staging Combustion Burning Pulverized Coal |
| CN111089287A (en) * | 2020-01-17 | 2020-05-01 | 常熟喷嘴厂有限公司 | Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor |
| CN111197743A (en) * | 2020-01-17 | 2020-05-26 | 常熟喷嘴厂有限公司 | Heat accumulating type M-shaped radiant tube unit and combustion method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694117Y (en) * | 2003-06-19 | 2005-04-20 | 杨思安 | Heat storing type radiant tube |
| CN101482266A (en) * | 2009-01-09 | 2009-07-15 | 吴道洪 | Low-calorific value gas double pre-heating heat accumulation type radiant tube |
| CN201277550Y (en) * | 2008-09-22 | 2009-07-22 | 苏和 | Integration type self-inverting heat-accumulation combustor |
| CN201364022Y (en) * | 2008-12-31 | 2009-12-16 | 邓小宝 | Central backflash internal-heat storage-type energy-saving high-efficient furnace and tank integration reducing furnace system |
| CN202158565U (en) * | 2011-07-06 | 2012-03-07 | 重庆赛迪工业炉有限公司 | Radiant tube heating device |
-
2011
- 2011-07-06 CN CN2011101881440A patent/CN102252328A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694117Y (en) * | 2003-06-19 | 2005-04-20 | 杨思安 | Heat storing type radiant tube |
| CN201277550Y (en) * | 2008-09-22 | 2009-07-22 | 苏和 | Integration type self-inverting heat-accumulation combustor |
| CN201364022Y (en) * | 2008-12-31 | 2009-12-16 | 邓小宝 | Central backflash internal-heat storage-type energy-saving high-efficient furnace and tank integration reducing furnace system |
| CN101482266A (en) * | 2009-01-09 | 2009-07-15 | 吴道洪 | Low-calorific value gas double pre-heating heat accumulation type radiant tube |
| CN202158565U (en) * | 2011-07-06 | 2012-03-07 | 重庆赛迪工业炉有限公司 | Radiant tube heating device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563654A (en) * | 2012-02-25 | 2012-07-11 | 佛山市科皓燃烧设备制造有限公司 | Self-heat storage type gas burner |
| CN103697476A (en) * | 2013-12-22 | 2014-04-02 | 北京科技大学 | Flat double P type radiant tube |
| CN103697476B (en) * | 2013-12-22 | 2016-04-20 | 北京科技大学 | A kind of flat double-P type radiant tube |
| CN110094733A (en) * | 2019-05-30 | 2019-08-06 | 武汉汇翔热工技术有限公司 | A kind of radiant tube low NOx combustion system based on Researched of Air Staging Combustion Burning Pulverized Coal |
| CN111089287A (en) * | 2020-01-17 | 2020-05-01 | 常熟喷嘴厂有限公司 | Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor |
| CN111197743A (en) * | 2020-01-17 | 2020-05-26 | 常熟喷嘴厂有限公司 | Heat accumulating type M-shaped radiant tube unit and combustion method thereof |
| CN111197743B (en) * | 2020-01-17 | 2022-07-19 | 常熟喷嘴厂有限公司 | Heat accumulating type M-shaped radiant tube unit and combustion method thereof |
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Application publication date: 20111123 |