CN202281227U - Radiant tube heat exchanger adopting flue gas backflow - Google Patents
Radiant tube heat exchanger adopting flue gas backflow Download PDFInfo
- Publication number
- CN202281227U CN202281227U CN2011203947414U CN201120394741U CN202281227U CN 202281227 U CN202281227 U CN 202281227U CN 2011203947414 U CN2011203947414 U CN 2011203947414U CN 201120394741 U CN201120394741 U CN 201120394741U CN 202281227 U CN202281227 U CN 202281227U
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- CN
- China
- Prior art keywords
- radiant tube
- heat exchanger
- flue gas
- burner
- air pipe
- 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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Abstract
The utility model discloses a radiant tube heat exchanger adopting flue gas backflow which has reasonable structure, can be used to reduce the combustion intensity of a burner nozzle and can realize the aims of energy saving and emission reduction. The radiant tube heat exchanger comprises the burner nozzle, a radiant tube, a heat exchanger, an air pipe and a fuel gas pipe, wherein the burner nozzle is communicated with the fuel gas pipe, the air pipe and the burning end of the radiant tube respectively, the flue gas discharge end of the radiant tube is sleeved on the outside of the heat exchanger and is connected with a flue gas outlet, the middle and/or tail end pipeline of the air pipe is located in the heat exchanger, an injection device is arranged between the air pipe and the burner nozzle, and the injection device is communicated with the air pipe, the burner nozzle and the flue gas outlet respectively. According to the utility model, the special injection device is arranged among the air pipe, the burner nozzle and the flue gas outlet to realize flue gas backflow, thus the aims of energy saving and emission reduction can be realized.
Description
Technical field
The utility model relates to a kind of heat-exchanger rig, particularly is mainly used in the radiant tube heat exchanger on combustion gas (or fuel oil) the radiant tube firing equipment of industrial furnace.
Background technology
At present, in metal heat treatmet, material melting etc. required than higher industry to product quality, the radiation pipe burner tip mode of heating obtained promotion and application widely.The operation principle of radiant tube: combustion air infeeds in air hose; After the heat exchanger heating, get into the burner place, burn after lighting a fire in burner end and the combustion gas mixing that infeeds, high-temperature flue gas (combustion product) flows in radiant tube; In the process of flow of flue gas; The radiant tube that passes through of high-temperature flue gas passes to outside product, reaches the purpose of heating products, and high-temperature flue gas is discharged from the radiant tube exhaust opening after through heat exchanger combustion air being heated then.This structure radiant tube is easy to generate a large amount of waste gas and causes environmental pollution serious, and therefore, people's research schedule has been put in the discharging of the reduction pollutant of how adopting an effective measure.
Summary of the invention
In order to overcome the deficiency of prior art, the utility model provide a kind of rational in infrastructure, reduce burner combustion intensity, reach the energy-saving and emission-reduction purpose, the radiant tube heat exchanger of band smoke backflow.
The utility model solves the technical scheme that its technical problem adopted:
A kind of radiant tube heat exchanger with smoke backflow; Comprise burner, radiant tube, heat exchanger, air hose, Gas Pipe; Burner is communicated with the fire end of Gas Pipe, air hose and radiant tube respectively, and the smoke evacuation end of radiant tube is set in the outside of heat exchanger and is connected with an exhaust opening, and the middle part of air hose and/or terminal pipeline are positioned at the inboard of heat exchanger; Be provided with induction apparatus between air hose and the burner, induction apparatus is communicated with air hose, burner and exhaust opening respectively.
In the utility model, said induction apparatus comprises and is communicated with burner and the conduit of exhaust opening, the air port that is communicated with air hose that air port stretches in the conduit.
The beneficial effect of the utility model is: the utility model is provided with special induction apparatus flue gas is refluxed between air hose, burner and exhaust opening; Enter into induction apparatus and during at the hot-air after the preheating from the ejection of its spout; Because the jet action of air; The partial fume that is positioned at the exhaust opening place can participate in into and get into burner burning because of air-spray, because partial fume is in radiant tube, to circulate for the second time, has reached the purpose of energy-saving and emission-reduction.On the other hand; A large amount of smoke backflows has reduced the oxygen content of burner combustion air, and the oxygen content of normal combustion air is 21%, behind the smoke backflow; Combustion air mixes the back oxygen content and is reduced to 13% ~ 20% with flue gas; Thereby reduced the combustion intensity of burner, realized the oxygen debt burning of burner, improved the surface uniformity of radiant tube and the thermal efficiency of radiant tube.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of U type radiant tube;
Fig. 2 is the structural representation of W type radiant tube.
The specific embodiment
With reference to Fig. 1, Fig. 2; The utility model discloses a kind of rational in infrastructure, reduce burner combustion intensity, reach the energy-saving and emission-reduction purpose, the radiant tube heat exchanger of band smoke backflow; Comprise burner 1, radiant tube 2, heat exchanger 3, air hose 4, Gas Pipe; Burner 1 is communicated with the fire end of Gas Pipe, air hose 4 and radiant tube 2 respectively, and the smoke evacuation end of radiant tube 2 is set in the outside of heat exchanger 3 and is connected with an exhaust opening 5, and the middle part of air hose 4 and/or terminal pipeline are positioned at the inboard of heat exchanger 3; In the present embodiment, heat exchanger 3 is set on the terminal pipeline of air hose 4.Be provided with induction apparatus 6 between air hose 4 and the burner 1, induction apparatus 6 is communicated with air hose 4, burner 1 and exhaust opening 5 respectively.As preferred embodiment, induction apparatus 6 comprises the conduit 7 that is communicated with burner 1 and exhaust opening 5, the air port 8 that is communicated with air hose 4, and air port 8 stretches in the conduit 7.
The operation principle of the utility model: air gets in the air hose 4 from the air interface of air hose 4; End at air hose 4 returns then; With air preheat, from air port 8 ejections of induction apparatus 6, the winding partial fume gets in the burner 1 and carries out oxygen debt burning then through rear flank in the heat exchanger 3.Gas fume after burning is through radiant tube 2; Thereby radiant tube 2 is heated; Flow through from the outside of the heat exchanger 3 that is positioned at radiant tube 2 smoke evacuation end then; Air to being positioned at heat exchanger 3 carries out preheating, and partial fume is back in the burner 1 through the conduit 7 of induction apparatus 6 then, and all the other flue gases are discharged from exhaust opening 5.
The utility model is mainly used on combustion gas (or fuel oil) the radiant tube firing equipment of industrial furnace, utilizes combustion air that the flue gas of burner is carried out the injection backflow, thereby reaches energy-saving and emission-reduction and improve the surface uniformity of radiant tube and the thermal efficiency of radiant tube.
Above-mentionedly just some preferred embodiments of the utility model are illustrated and describe; But the embodiment of the utility model is not restricted to the described embodiments; As long as it reaches the technique effect of the utility model with essentially identical means, all should belong to the protection domain of the utility model.
Claims (2)
1. radiant tube heat exchanger with smoke backflow; Comprise burner (1), radiant tube (2), heat exchanger (3), air hose (4), Gas Pipe; Burner (1) is communicated with the fire end of Gas Pipe, air hose (4) and radiant tube (2) respectively; The smoke evacuation end of radiant tube (2) is set in the outside of heat exchanger (3) and is connected with an exhaust opening (5); The middle part of air hose (4) and/or terminal pipeline are positioned at the inboard of heat exchanger (3), it is characterized in that: be provided with induction apparatus (6) between air hose (4) and the burner (1), induction apparatus (6) is communicated with air hose (4), burner (1) and exhaust opening (5) respectively.
2. a kind of radiant tube heat exchanger according to claim 1 with smoke backflow; It is characterized in that: said induction apparatus (6) comprises and is communicated with burner (1) and the conduit (7) of exhaust opening (5), the air port (8) that is communicated with air hose (4) that air port (8) stretches in the conduit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203947414U CN202281227U (en) | 2011-10-17 | 2011-10-17 | Radiant tube heat exchanger adopting flue gas backflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203947414U CN202281227U (en) | 2011-10-17 | 2011-10-17 | Radiant tube heat exchanger adopting flue gas backflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202281227U true CN202281227U (en) | 2012-06-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203947414U Expired - Lifetime CN202281227U (en) | 2011-10-17 | 2011-10-17 | Radiant tube heat exchanger adopting flue gas backflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202281227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105408716A (en) * | 2013-08-02 | 2016-03-16 | 萨克米伊莫拉机械合作社合作公司 | A radiating heating module for continuous-cycle firing kilns of ceramic products |
| CN109307270A (en) * | 2018-11-04 | 2019-02-05 | 佛山市科皓燃烧设备制造有限公司 | A kind of inside smoke flows back low NOx self preheating burner |
-
2011
- 2011-10-17 CN CN2011203947414U patent/CN202281227U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105408716A (en) * | 2013-08-02 | 2016-03-16 | 萨克米伊莫拉机械合作社合作公司 | A radiating heating module for continuous-cycle firing kilns of ceramic products |
| CN109307270A (en) * | 2018-11-04 | 2019-02-05 | 佛山市科皓燃烧设备制造有限公司 | A kind of inside smoke flows back low NOx self preheating burner |
| CN109307270B (en) * | 2018-11-04 | 2023-09-12 | 佛山市科皓燃烧设备制造有限公司 | Low NOx self-preheating burner with internal flue gas backflow |
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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: 20120620 |