CN216346259U - Multistage flue gas circulation low NOx burner - Google Patents
Multistage flue gas circulation low NOx burner Download PDFInfo
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- CN216346259U CN216346259U CN202122642110.6U CN202122642110U CN216346259U CN 216346259 U CN216346259 U CN 216346259U CN 202122642110 U CN202122642110 U CN 202122642110U CN 216346259 U CN216346259 U CN 216346259U
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Abstract
The utility model discloses a multistage flue gas circulation low-nitrogen combustor, which relates to the technical field of combustors and comprises a multistage combustor, wherein an air pipe is arranged at the bottom of the multistage combustor, a flue gas discharge pipe is arranged at the top of the multistage combustor, the flue gas discharge pipe is connected with a flue gas treatment chamber through a flue gas branch pipe, the flue gas treatment chamber is connected with a mixing chamber through a connecting pipe, the mixing chamber is communicated with the air pipe through an air branch pipe, a conical cooling disc is fixedly arranged at the top of the inner cavity of the flue gas treatment chamber, and a gap is reserved between the edge of the conical cooling disc and the inner wall of the flue gas treatment chamber. According to the utility model, the conical cooling disc is arranged in the flue gas treatment chamber, so that when flue gas flows into the flue gas treatment chamber, the flue gas uniformly collides with the surface of the conical cooling disc firstly, and water vapor in the flue gas is liquefied instantly due to sudden temperature drop, so that water vapor separation in the flue gas is completed, and the safety of a combustion system is greatly ensured.
Description
Technical Field
The utility model relates to the technical field of combustors, in particular to a multistage flue gas circulation low-nitrogen combustor.
Background
The low NOx burner and the low nitrogen oxide burner refer to burners with low NOx emission in the fuel combustion process, and the low NOx burner can reduce the emission of nitrogen oxides in the combustion process. The nitrogen oxides produced during combustion are primarily NO and NO2, which are commonly referred to as nitrogen oxides NOx. NOx reduction can be achieved by modifying combustion technology, the main approaches of which are as follows: selecting fuel with low N content, including fuel denitrification and conversion into low-nitrogen fuel; the air excess coefficient is reduced, and the over-rich combustion is organized to reduce the concentration of oxygen around the fuel; in the case of low excess air, the temperature spike is lowered to reduce the "thermal reaction NO"; at lower oxygen concentrations, the residence time of the combustibles in the flame front and the reaction zone is increased. Specific methods commonly employed to reduce NOx formation and emissions are: staged combustion, a reburning method, low oxygen combustion, lean-burn combustion, flue gas recirculation, and the like.
A large number of boiler low-nitrogen combustors are put on the market in response to the requirements of environmental protection policies, but the existing flue gas circulating combustors lack effective treatment on flue gas, for example, the flue gas contains certain water vapor, and the long-term circulation can cause certain influence on the combustors.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multi-stage flue gas circulation low-nitrogen combustor to solve the defects in the prior art.
In order to achieve the above purpose, the utility model provides the following technical scheme: the utility model provides a multistage flue gas circulation low-nitrogen combustor, includes multistage combustor, the bottom of multistage combustor is provided with the air hose, the top of multistage combustor is provided with the flue gas delivery pipe, the flue gas delivery pipe has the flue gas treatment chamber through flue gas branch connection, the flue gas treatment chamber is connected with the mixing chamber through the connecting pipe, the mixing chamber passes through air branch pipe and air hose intercommunication, the top fixed mounting of flue gas treatment chamber inner chamber has the toper cooling disc, just the gap is left with the flue gas treatment chamber inner wall in the edge of toper cooling disc, the bottom fixed mounting of toper cooling disc has spiral heat transfer coil, the bottom of mixing chamber is connected with multistage combustor through the circulation back flow.
Preferably, an air exhaust impeller is mounted inside the bottom of the flue gas branch pipe of the multi-stage combustor, and the air exhaust impeller is used for conveying a part of the flue gas discharged by the flue gas discharge pipe into the flue gas treatment chamber.
Preferably, the top fixed mounting of mixing chamber has cold water room and heating chamber, the both ends of spiral heat exchange coil pipe are connected with spiral heat exchange tube and heating chamber respectively, just the inside fixed mounting of mixing chamber has the spiral heat exchange tube, the both ends of spiral heat exchange tube are connected with cold water room and heating chamber respectively, spiral heat exchange coil pipe, spiral heat exchange tube, heating chamber and cold water room form liquid circulation return circuit, just the inside of heating chamber is provided with the heater, the one end of spiral heat exchange coil pipe is provided with the water pump.
Preferably, the bottom of the flue gas treatment chamber is provided with a water accumulation cavity, and the top of the water accumulation cavity is provided with a funnel disc.
Preferably, be provided with between flue gas branch pipe and the flue gas delivery pipe and strain the dirt case, the inside slidable mounting that strains the dirt case has the filter cartridge, the internally mounted of filter cartridge has the dust filter core, the top of filter cartridge sets up to the opening, just the bottom of filter cartridge sets up to the filter plate.
In the technical scheme, the utility model provides the following technical effects and advantages:
1. the utility model reduces the emission of nitrogen oxides by sucking back part of combustion flue gas, entering the combustor and mixing and combusting with air, and the conical cooling disc is arranged in the flue gas treatment chamber, so that the conical cooling disc protrudes upwards, and when the flue gas flows into the flue gas treatment chamber, the flue gas uniformly collides with the surface of the conical cooling disc firstly, so that part of larger dust in the flue gas is attached to the surface of the conical cooling disc, so as to reduce the cleanness degree of the flue gas during recovery into the furnace, meanwhile, the water vapor in the flue gas is instantly liquefied due to sudden temperature drop and drops downwards from the surface of the conical cooling disc, and is collected by the funnel disc and guided to flow to the water accumulation cavity, thereby completing the water vapor separation in the flue gas, and greatly ensuring the safety of a combustion system;
2. the flue gas temperature is high, cold water in the spiral heat exchange coil can be heated to a certain degree, then the cold water flows into the heating chamber to be further heated and then flows back into the cold water chamber through the spiral heat exchange tube to be cooled, and the hot water can heat and preheat mixed gas in the mixing chamber in the flowing process of the hot water in the spiral heat exchange tube, so that the mixed gas can be better combusted after entering the multistage combustor, the utilization of the heat of the flue gas is further improved, and the efficiency of the flue gas in the circulating use process is improved;
3. according to the utility model, the dust filtering box is arranged on the flue gas branch pipe, and the filtering box is arranged in the dust filtering box, so that when flue gas passes through the dust filtering core in the filtering box, large-particle smoke dust can be preliminarily absorbed and filtered, the accumulation of a large amount of smoke dust in the system is avoided, and the filtering box can be jacked up to be taken out and the dust filtering core in the filtering box can be replaced by utilizing the drawing and sliding of the filtering box, so that the practicability of the device is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an enlarged view of a portion of the structure of the present invention.
Fig. 3 is a schematic view of the overall structure of the dust-removing box of the present invention.
Description of reference numerals:
1. a multi-stage combustor; 11. an air tube; 12. a flue gas discharge pipe; 13. a flue gas branch pipe; 14. an air branch pipe; 2. a flue gas treatment chamber; 21. a conical cooling pan; 22. a connecting pipe; 23. a funnel tray; 3. an air exhaust impeller; 4. a dust filtering box; 41. a filter box; 42. a dust filter element; 43. filtering the plate; 5. a mixing chamber; 51. a circulating return pipe; 6. a spiral heat exchange coil; 61. a spiral heat exchange tube; 62. a heating chamber; 63. a cold water chamber; 64. and (4) a water pump.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Example 1
The utility model provides a multistage flue gas circulation low-nitrogen combustor as shown in figures 1-3, which comprises a multistage combustor 1, wherein an air pipe 11 is arranged at the bottom of the multistage combustor 1, a flue gas discharge pipe 12 is arranged at the top of the multistage combustor 1, the flue gas discharge pipe 12 is connected with a flue gas treatment chamber 2 through a flue gas branch pipe 13, the flue gas treatment chamber 2 is connected with a mixing chamber 5 through a connecting pipe 22, the mixing chamber 5 is communicated with the air pipe 11 through an air branch pipe 14, a conical cooling disc 21 is fixedly installed at the top of an inner cavity of the flue gas treatment chamber 2, a gap is reserved between the edge of the conical cooling disc 21 and the inner wall of the flue gas treatment chamber 2, a spiral heat exchange coil 6 is fixedly installed at the bottom of the conical cooling disc 21, and the bottom of the mixing chamber 5 is connected with the multistage combustor 1 through a circulation return pipe 51;
further, in the above technical solution, an air exhaust impeller 3 is installed inside the bottom of the flue gas branch pipe 13 of the multi-stage combustor 1, and the air exhaust impeller 3 is used for conveying a part of the flue gas discharged by the flue gas discharge pipe 12 into the flue gas treatment chamber 2;
further, in the above technical solution, a cold water chamber 63 and a heating chamber 62 are fixedly installed at the top of the mixing chamber 5, two ends of the spiral heat exchange coil 6 are respectively connected with the spiral heat exchange tube 61 and the heating chamber 62, the spiral heat exchange tube 61 is fixedly installed inside the mixing chamber 5, two ends of the spiral heat exchange tube 61 are respectively connected with the cold water chamber 63 and the heating chamber 62, the spiral heat exchange coil 6, the spiral heat exchange tube 61, the heating chamber 62 and the cold water chamber 63 form a liquid circulation loop, a heater is installed inside the heating chamber 62, a water pump 64 is installed at one end of the spiral heat exchange coil 6, under the action of the water pump 64, cold water in the cold water chamber 63 is conveyed into the spiral heat exchange coil 6, so that the conical cooling disc 21 constantly keeps a lower temperature, and because the temperature of flue gas is higher, the cold water in the spiral heat exchange coil 6 can be heated to a certain extent, then, after the cold water flows into the heating chamber 62 for further heating, the cold water flows back into the cold water chamber 63 through the spiral heat exchange tube 61 for cooling, and the hot water heats and preheats the mixed gas in the mixing chamber 5 in the flowing process of the hot water in the spiral heat exchange tube 61, so that the mixed gas can be better combusted after entering the multistage combustor 1;
further, in the above technical scheme, a water accumulation cavity is arranged at the bottom of the flue gas treatment chamber 2, and a funnel tray 23 is arranged at the top of the water accumulation cavity, so that liquefied water can be conveniently collected;
example 2
As shown in fig. 2, the multistage flue gas circulation low-nitrogen combustor comprises a multistage combustor 1, an air pipe 11 is arranged at the bottom of the multistage combustor 1, a flue gas discharge pipe 12 is arranged at the top of the multistage combustor 1, the flue gas discharge pipe 12 is connected with a flue gas treatment chamber 2 through a flue gas branch pipe 13, the flue gas treatment chamber 2 is connected with a mixing chamber 5 through a connecting pipe 22, the mixing chamber 5 is communicated with the air pipe 11 through an air branch pipe 14, a conical cooling disc 21 is fixedly mounted at the top of an inner cavity of the flue gas treatment chamber 2, a gap is reserved between the edge of the conical cooling disc 21 and the inner wall of the flue gas treatment chamber 2, a spiral heat exchange coil 6 is fixedly mounted at the bottom of the conical cooling disc 21, and the bottom of the mixing chamber 5 is connected with the multistage combustor 1 through a circulation return pipe 51;
further, in the above technical solution, a dust filtering box 4 is arranged between the flue gas branch pipe 13 and the flue gas discharge pipe 12, a filter box 41 is slidably mounted inside the dust filtering box 4, a dust filtering core 42 is mounted inside the filter box 41, the top of the filter box 41 is provided with an opening, the bottom of the filter box 41 is provided with a filter plate 43, when flue gas passes through the dust filtering core 42 in the filter box 41, large-particle smoke dust can be preliminarily absorbed and filtered, accumulation of a large amount of smoke dust inside the system is avoided, and the filter box 41 can be jacked up to be taken out to replace the dust filtering core 42 inside by using the pulling and sliding of the filter box 41;
the working principle is as follows: by arranging the flue gas treatment chamber 2 and the mixing chamber 5, the flue gas exhausted by the multi-stage combustor 1 can be recycled by the air exhaust impeller 3 from the flue gas exhaust pipe 12 to be treated in the flue gas treatment chamber 2 and then conveyed into the mixing chamber 5, the flue gas is mixed with part of air input by the air branch pipe 14 and then conveyed into the multi-stage combustor 1 again for combustion, and the part of the combustion flue gas is sucked back to enter the combustor to be mixed and combusted with the air, because of the recirculation of the flue gas, the thermal capacity of the combustion flue gas is large, the combustion temperature is reduced, NOx is reduced, the emission of nitrogen oxides is greatly reduced, the conical cooling disc 21 is upwards protruded by installing the conical cooling disc 21 in the flue gas treatment chamber 2, and when the flue gas flows into the flue gas treatment chamber 2, the flue gas firstly uniformly impacts the surface of the conical cooling disc 21, so that part of larger dust in the flue gas is attached to the surface of the conical cooling disc 21, the cleaning degree of the flue gas in the furnace is reduced, meanwhile, the spiral heat exchange coil 6 is arranged at the bottom of the conical cooling plate 21, the spiral heat exchange tube 61 is arranged in the mixing chamber 5, so that the spiral heat exchange coil 6, the heating chamber 62, the cold water chamber 63 and the spiral heat exchange tube 61 form a liquid circulation loop, when the gas-fired boiler is in practical use, cold water in the cold water chamber 63 is conveyed into the spiral heat exchange coil 6 under the action of the water pump 64, the conical cooling plate 21 keeps a lower temperature constantly, when the flue gas rushes to the surface of the conical cooling plate 21, the temperature suddenly drops, so that the water vapor part in the flue gas is instantly liquefied and drops downwards from the surface of the conical cooling plate 21, and the flue gas is collected and guided to flow to the water accumulation cavity through the hopper plate 23, so that the water vapor in the flue gas is separated, and the conical cooling plate 21 is conical, so that the surface area is larger and the contact area with the fuel gas is larger, the treatment efficiency of the water vapor is higher, and because the flue gas temperature is higher, cold water in the spiral heat exchange coil 6 can be heated to a certain degree, then the cold water flows into the heating chamber 62 to be further heated, and flows back into the cold water chamber 63 through the spiral heat exchange tube 61 to be cooled, and hot water can heat and preheat mixed gas in the mixing chamber 5 in the flowing process of the spiral heat exchange tube 61, so that the mixed gas can be better combusted after entering the multistage combustor 1, the utilization of the flue gas heat is further improved, the efficiency of the flue gas during circulating use is improved, the safety of a combustion system is greatly ensured, and the dust filtering box 4 is arranged on the flue gas branch tube 13, the filter box 41 is arranged in the dust filtering box 4, so that large-particle smoke dust can be preliminarily absorbed and filtered when the flue gas passes through the dust filtering core 42 in the filter box 41, and the accumulation of a large amount of smoke dust in the system is avoided, and the filter cartridge 41 can be taken out and the internal dust filter core 42 can be replaced by jacking up the filter cartridge 41 by utilizing the drawing and sliding of the filter cartridge 41, thereby further improving the practicability of the device.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.
Claims (5)
1. The utility model provides a multistage flue gas circulation low NOx burner, includes multistage combustor (1), the bottom of multistage combustor (1) is provided with air pipe (11), the top of multistage combustor (1) is provided with flue gas discharge pipe (12), its characterized in that: flue gas discharge pipe (12) are connected with flue gas treatment chamber (2) through flue gas branch pipe (13), flue gas treatment chamber (2) are connected with mixing chamber (5) through connecting pipe (22), mixing chamber (5) are through air branch pipe (14) and air pipe (11) intercommunication, the top fixed mounting of flue gas treatment chamber (2) inner chamber has toper cooling plate (21), just the gap has been left with flue gas treatment chamber (2) inner wall to the edge of toper cooling plate (21), the bottom fixed mounting of toper cooling plate (21) has spiral heat transfer coil (6), the bottom of mixing chamber (5) is connected with multistage combustor (1) through circulation back flow (51).
2. The multi-stage flue gas recirculation low-nitrogen combustor of claim 1, characterized in that: the multistage burner (1) is characterized in that an air exhaust impeller (3) is arranged inside the bottom of the flue gas branch pipe (13), and the air exhaust impeller (3) is used for conveying one part of flue gas exhausted by the flue gas exhaust pipe (12) to the flue gas treatment chamber (2).
3. The multi-stage flue gas recirculation low-nitrogen combustor of claim 1, characterized in that: the top fixed mounting of mixing chamber (5) has cold water room (63) and heating chamber (62), the both ends of spiral heat exchange coil (6) are connected with spiral heat exchange tube (61) and heating chamber (62) respectively, just the inside fixed mounting of mixing chamber (5) has spiral heat exchange tube (61), the both ends of spiral heat exchange tube (61) are connected with cold water room (63) and heating chamber (62) respectively, spiral heat exchange coil (6), spiral heat exchange tube (61), heating chamber (62) and cold water room (63) form liquid circulation return circuit, just the inside of heating chamber (62) is provided with the heater, the one end of spiral heat exchange coil (6) is provided with water pump (64).
4. The multi-stage flue gas recirculation low-nitrogen combustor of claim 1, characterized in that: the bottom of flue gas treatment chamber (2) is provided with the ponding chamber, the top in ponding chamber is provided with hopper dish (23).
5. The multi-stage flue gas recirculation low-nitrogen combustor of claim 1, characterized in that: be provided with between flue gas branch pipe (13) and flue gas discharge pipe (12) and strain dirt case (4), the inside slidable mounting that strains dirt case (4) has filter cartridge (41), the internally mounted of filter cartridge (41) has and strains dirt core (42), the top of filter cartridge (41) sets up to the opening, just the bottom of filter cartridge (41) sets up to filter plate (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122642110.6U CN216346259U (en) | 2021-11-01 | 2021-11-01 | Multistage flue gas circulation low NOx burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122642110.6U CN216346259U (en) | 2021-11-01 | 2021-11-01 | Multistage flue gas circulation low NOx burner |
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| CN216346259U true CN216346259U (en) | 2022-04-19 |
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| CN202122642110.6U Active CN216346259U (en) | 2021-11-01 | 2021-11-01 | Multistage flue gas circulation low NOx burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093104A (en) * | 2022-07-29 | 2022-09-23 | 贵定县恒伟玻璃制品有限公司 | Low-nitrogen combustion glass kiln |
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2021
- 2021-11-01 CN CN202122642110.6U patent/CN216346259U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093104A (en) * | 2022-07-29 | 2022-09-23 | 贵定县恒伟玻璃制品有限公司 | Low-nitrogen combustion glass kiln |
| CN115093104B (en) * | 2022-07-29 | 2024-04-16 | 贵定县恒伟玻璃制品有限公司 | Low-nitrogen combustion glass kiln |
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