CN216203346U - Two-stage smoke ejection radiant tube low-nitrogen burner - Google Patents
Two-stage smoke ejection radiant tube low-nitrogen burner Download PDFInfo
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- CN216203346U CN216203346U CN202122525727.XU CN202122525727U CN216203346U CN 216203346 U CN216203346 U CN 216203346U CN 202122525727 U CN202122525727 U CN 202122525727U CN 216203346 U CN216203346 U CN 216203346U
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- cavity body
- radiant tube
- flue gas
- heat exchanger
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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 utility model discloses a two-stage smoke injection radiant tube low-nitrogen burner in the technical field of low-nitrogen burners, which comprises a radiant tube, a heat exchanger, a burner, a connecting cavity body, a smoke cavity body, an air cavity body and a reflux device, wherein the heat exchanger is arranged at one end of the radiant tube, the burner is arranged at the other end of the radiant tube, one end of the connecting cavity body is connected with one end of the smoke cavity body, and the other end of the connecting cavity body is connected with one end of the heat exchanger; the combustor is provided with an expansion joint connecting piece, one end of the backflow device is connected with the expansion joint connecting piece, and the other end of the backflow device is connected with the connecting cavity body and the smoke cavity body respectively. The beneficial effects are as follows: 1. the secondary injection device can inject smoke gas in a larger amount, reduce the oxygen concentration of combustion air and reduce the emission of nitrogen oxides; 2. the second-stage injection can inject more flue gas quantity under the same volume; 3. and a control structure is not required to be added, and lower nitrogen oxide emission is realized.
Description
Technical Field
The utility model belongs to the technical field of low-nitrogen combustors, and particularly relates to a two-stage smoke ejection radiant tube low-nitrogen combustor.
Background
Under the national policy of strongly promoting 'energy conservation and emission reduction and low-carbon economy', nitrogen oxides are one of main pollution sources causing atmospheric pollution and harm to human health; the research and treatment of nitrogen oxide emission is a main direction of international pollution treatment at present.
The state puts forward a new standard for the emission requirements of various industries, and the flue gas recirculation technology is one of effective measures for controlling the emission of nitrogen oxides. The returned flue gas is mixed with combustion air, so that the oxygen concentration of the combustion air is reduced, and the generation of nitrogen oxides is inhibited. In a heat treatment furnace, the process requirements are realized on the premise of ensuring the product quality by adopting a radiant tube for indirect heating on a large scale. In order to improve the energy utilization rate, the waste heat of the flue gas is usually used for preheating combustion gas or combustion-supporting gas by using a heat exchange device, and the flue gas is mixed into the combustion-supporting air by using an injection structure in a heat exchanger in the flue gas recirculation technology. Draw and penetrate the structure and can influence the flue gas backward flow volume to influence burning nitrogen oxide and discharge, consequently bigger flue gas draws and penetrates the discharge that volume can more effectual reduction nitrogen oxide.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model determines to develop a two-stage smoke ejection radiant tube low-nitrogen combustor.
A two-stage smoke ejection radiant tube low-nitrogen burner comprises a radiant tube, a heat exchanger, a burner, a connecting cavity body, a smoke cavity body, an air cavity body and a backflow device, wherein the heat exchanger is arranged at one end of the radiant tube, the burner is arranged at the other end of the radiant tube, one end of the connecting cavity body is connected with one end of the smoke cavity body, and the other end of the connecting cavity body is connected with one end of the heat exchanger; the combustor is provided with an expansion joint connecting piece, one end of the backflow device is connected with the expansion joint connecting piece, and the other end of the backflow device is connected with the connecting cavity body and the smoke cavity body respectively.
Further, the heat exchanger comprises an injection pipe, and a primary injection nozzle is arranged at the outlet of the injection pipe; the backflow device comprises a primary injected channel, a primary injected back flow channel, a secondary injected nozzle, a flue gas backflow pipe and a secondary injected back flow channel, one end of the primary injected channel is connected with the connecting cavity body, the other end of the primary injected channel is connected with one end of the primary injected back flow channel, the primary injected nozzle extends into the primary injected channel, a secondary injected nozzle is arranged at an outlet of the primary injected back flow channel, and the flue gas backflow pipe is arranged on the flue gas cavity body; one end of the secondary injection rear flow passage is connected with the flue gas backflow pipe, the other end of the secondary injection rear flow passage is connected with one end of the expansion joint connecting piece, and the secondary injection nozzle extends into the secondary injection rear flow passage.
The utility model has the following beneficial effects:
1. the secondary injection device can inject smoke gas in a larger amount, reduce the oxygen concentration of combustion air and reduce the emission of nitrogen oxides;
2. the second-stage injection is connected with the smoke exhaust part at the tail end of the heat exchanger, the smoke temperature is lower, the density is higher, and more smoke can be injected under the same volume;
3. need not to increase control structure, draw to penetrate structural simple change and can realize bigger flue gas and draw the penetrating volume at former flue gas, realize lower nitrogen oxide and discharge.
Drawings
FIG. 1 is a structural section view of a two-stage flue gas injection radiant tube low-nitrogen burner;
FIG. 2 is a partial enlarged view of portion A;
the reference numbers in the figures are:
the device comprises a radiant tube 1, a heat exchanger 2, a burner 3, a connecting cavity body 4, a smoke cavity body 5, an air cavity body 6, a smoke exhaust channel 7, an expansion joint connecting piece 8, a primary injection nozzle 9, a primary injection channel 10, a primary injection back flow channel 11, a secondary injection nozzle 12, a smoke backflow pipe 13, an injection pipe 14 and a secondary injection back flow channel 15.
Detailed Description
Example 1
A two-stage smoke ejection radiant tube low-nitrogen burner comprises a radiant tube 1, a heat exchanger 2, a burner 3, a connecting cavity body 4, a smoke cavity body 5, an air cavity body 6 and a backflow device, wherein the heat exchanger 2 is arranged at one end of the radiant tube 1, the burner 3 is arranged at the other end of the radiant tube 1, one end of the connecting cavity body 4 is connected with one end of the smoke cavity body 5, and the other end of the connecting cavity body 4 is connected with one end of the heat exchanger 2; and an expansion joint connecting piece 8 is arranged on the combustor 3.
The heat exchanger 2 comprises an injection pipe 14, and a primary injection nozzle 9 is arranged at the outlet of the injection pipe 14; the backflow device comprises a primary injected channel 10, a primary injected back flow channel 11, a secondary injected nozzle 12, a flue gas backflow pipe 13 and a secondary injected back flow channel 15, one end of the primary injected channel 10 is connected with the connecting cavity body 4, the other end of the primary injected channel 10 is connected with one end of the primary injected back flow channel 11, the primary injected nozzle 9 extends into the primary injected channel 10, the secondary injected nozzle 12 is arranged at the outlet of the primary injected back flow channel 11, and the flue gas backflow pipe 13 is arranged on the flue gas cavity body 5; one end of the secondary injection rear flow passage 15 is connected with the flue gas backflow pipe 13, the other end of the secondary injection rear flow passage 15 is connected with one end of the expansion joint connecting piece 8, and the secondary injection nozzle 12 extends into the secondary injection rear flow passage 15.
Claims (2)
1. The utility model provides a second grade flue gas draws penetrates low NOx burner of radiant tube which characterized in that: the flue gas recirculation device comprises a radiant tube (1), a heat exchanger (2), a burner (3), a connecting cavity body (4), a flue gas cavity body (5), an air cavity body (6) and a backflow device, wherein the heat exchanger (2) is arranged at one end of the radiant tube (1), the burner (3) is arranged at the other end of the radiant tube (1), one end of the connecting cavity body (4) is connected with one end of the flue gas cavity body (5), and the other end of the connecting cavity body (4) is connected with one end of the heat exchanger (2); the combustor is characterized in that an expansion joint connecting piece (8) is arranged on the combustor (3), one end of the backflow device is connected with the expansion joint connecting piece (8), and the other end of the backflow device is connected with the connecting cavity body (4) and the flue gas cavity body (5) respectively.
2. The two-stage smoke ejection radiant tube low-nitrogen combustor according to claim 1, characterized in that: the heat exchanger (2) comprises an injection pipe (14), and a primary injection nozzle (9) is arranged at the outlet of the injection pipe (14); the backflow device comprises a primary injected channel (10), a primary injected back flow channel (11), a secondary injected nozzle (12), a flue gas backflow pipe (13) and a secondary injected back flow channel (15), one end of the primary injected channel (10) is connected with the connecting cavity body (4), the other end of the primary injected channel (10) is connected with one end of the primary injected back flow channel (11), the primary injected nozzle (9) extends into the primary injected channel (10), a secondary injected nozzle (12) is arranged at the outlet of the primary injected back flow channel (11), and the flue gas backflow pipe (13) is arranged on the flue gas cavity body (5); one end of the secondary injection rear flow channel (15) is connected with the flue gas backflow pipe (13), the other end of the secondary injection rear flow channel (15) is connected with one end of the expansion joint connecting piece (8), and the secondary injection nozzle (12) extends into the secondary injection rear flow channel (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122525727.XU CN216203346U (en) | 2021-10-20 | 2021-10-20 | Two-stage smoke ejection radiant tube low-nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122525727.XU CN216203346U (en) | 2021-10-20 | 2021-10-20 | Two-stage smoke ejection radiant tube low-nitrogen burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216203346U true CN216203346U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122525727.XU Active CN216203346U (en) | 2021-10-20 | 2021-10-20 | Two-stage smoke ejection radiant tube low-nitrogen burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216203346U (en) |
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2021
- 2021-10-20 CN CN202122525727.XU patent/CN216203346U/en active Active
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