CN216384167U - Flue gas internal circulation combustor - Google Patents
Flue gas internal circulation combustor Download PDFInfo
- Publication number
- CN216384167U CN216384167U CN202122590397.2U CN202122590397U CN216384167U CN 216384167 U CN216384167 U CN 216384167U CN 202122590397 U CN202122590397 U CN 202122590397U CN 216384167 U CN216384167 U CN 216384167U
- Authority
- CN
- China
- Prior art keywords
- gas
- flue gas
- gas inner
- cylinder
- nozzle
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a flue gas internal circulation combustor, which comprises: the annular arranges a plurality of air feed spray pipes in the flue gas inner loop section of thick bamboo outside, and the end of each air feed spray pipe forms rather than swing joint and to keeping away from the slope of the longitudinal axis line direction of flue gas inner loop section of thick bamboo and be the nozzle of first preset angle with the axis that corresponds the air feed spray pipe, and the lateral wall of nozzle forms to the longitudinal axis line direction extension of flue gas inner loop section of thick bamboo and is the main jet of second preset angle with the axis of air feed spray pipe. The utility model solves the problems that the combustion of the burner in the prior art is not uniform, so that the generation of thermal NOx cannot be inhibited and the overall thermal efficiency is low.
Description
Technical Field
The utility model relates to the technical field of combustors, in particular to a flue gas internal circulation combustor.
Background
Generally, the combustion chamber of the boiler is terminated with a closed structure, and a metal fiber premix burner is generally adopted. However, the exhaust gas of the metal fiber premixing burner has a high oxygen content, so that the smoke discharge amount is increased, and the burner head of the burner adopts a fixed structure, so that the burner is not uniformly combusted, and the generation of thermal NOx cannot be inhibited.
In view of the above, there is a need for an improved burner of the prior art to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to disclose a flue gas internal circulation combustor, which aims to solve the problems that the combustor in the prior art cannot inhibit the generation of thermal NOx due to uneven combustion, and the overall thermal efficiency is low.
In order to achieve one of the above objects, the present invention provides a flue gas internal circulation burner, comprising:
the annular is arranged in a plurality of air feed spray pipes in the flue gas inner loop section of thick bamboo outside, and the end of each air feed spray pipe forms rather than swing joint and to keeping away from the nozzle that the longitudinal axis line direction slope of flue gas inner loop section of thick bamboo and be first preset angle with the axis that corresponds the air feed spray pipe, the lateral wall of nozzle form to the longitudinal axis line direction of flue gas inner loop section of thick bamboo extends and with the axis of air feed spray pipe is the main mouth that the angle was preset to the second.
As a further improvement of the utility model, the central points of the tail ends of the plurality of nozzles are arranged in an annular shape, and the injection positions of the plurality of main nozzles are opposite to the position of the longitudinal central axis of the smoke gas inner circulation cylinder.
As a further improvement of the utility model, the side wall of each nozzle forms at least one first air outlet, and the end of each nozzle forms a second air outlet.
As a further improvement of the utility model, the tail end of the air supply spray pipe is sleeved with a fixed sleeve, the nozzle is embedded in the fixed sleeve, and a fixed part for fixing the nozzle is arranged on the side wall of the fixed sleeve.
As a further improvement of the utility model, the method also comprises the following steps:
a gas inner cylinder;
the tail end of the gas outer cylinder is flush with the tail end of the gas inner cylinder;
the gas urceolus sets firmly and arranges and overlap rather than the terminal laminating and establish on the gas inner tube and supply the fixed disk that a plurality of air feed spray tubes run through.
As a further improvement of the utility model, the top end of the gas outer cylinder extends from the side wall of the gas outer cylinder to the outer side wall of the gas inner cylinder so as to form a sealed gas channel with the outer side wall of the gas inner cylinder.
As a further improvement of the utility model, an annular tapered end extends from one side of the fixed disc to the direction far away from the gas inner cylinder, and the smoke inner circulation cylinder is sleeved at the annular tapered end.
As a further improvement of the utility model, the side wall of the gas outer cylinder forms a gas input port for inputting gas into the sealed gas channel.
As a further improvement of the utility model, an air input port for inputting air into the gas inner barrel is formed on the side wall of the gas inner barrel.
As a further improvement of the utility model, a central spray pipe longitudinally penetrates through the gas inner cylinder and extends to the smoke gas inner circulation cylinder, and a cyclone disc trapped in the smoke gas inner circulation cylinder is arranged at the tail end of the central spray pipe.
Compared with the prior art, the utility model has the beneficial effects that:
the gas internal circulation combustor provided by the utility model has the advantages that the nozzles formed at the tail ends of the gas supply spray pipes are inclined towards the direction far away from the longitudinal central axis of the gas internal circulation cylinder and form a first preset angle with the central axis of the corresponding gas supply spray pipe, and the main nozzles, the side walls of which extend towards the longitudinal central axis of the gas internal circulation cylinder, form a second preset angle with the central axis of the gas supply spray pipes, so that gas sprayed by the nozzles of the plurality of annularly arranged gas supply spray pipes is spirally and vertically sprayed towards the inner side of the boiler towards the inner side of the gas internal circulation cylinder, and uniform combustion is realized. Meanwhile, each nozzle is movably connected with the corresponding gas supply spray pipe, so that the spray angle of the main nozzle can be changed by adjusting the inclined direction of each nozzle, the combustion uniformity and stability of the combustor are further improved, the generation of thermal NOx is effectively reduced, and the overall thermal efficiency of the combustor is improved. The problem of the combustor among the prior art burn inhomogeneous and lead to unable suppression thermal type NOx's formation and whole thermal efficiency is lower is solved.
Drawings
FIG. 1 is a perspective view of an internal flue gas recirculation burner according to an embodiment of the present invention;
FIG. 2 is an exploded view of a flue gas internal circulation combustor according to an embodiment of the present invention;
FIG. 3 is a front view of an in-flue gas recirculation combustor according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3;
FIG. 6 is an enlarged view at B in FIG. 3;
fig. 7 is a sectional view taken in the direction D-D of fig. 6.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
It should be understood that in the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", etc. indicate the orientation or positional relationship indicated on the drawings, which is only for convenience of describing the present technical solution and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the technical solution.
The first embodiment is as follows:
as described with reference to fig. 1 to 7, the present embodiment provides a flue gas internal circulation combustor including: the plurality of air supply spray pipes 20 are annularly arranged on the outer side of the flue gas internal circulation cylinder 10, a spray nozzle 201 which is movably connected with the tail end of each air supply spray pipe 20, inclines towards the direction far away from the longitudinal central axis of the flue gas internal circulation cylinder 10 and forms a first preset angle alpha with the central axis 200 of the corresponding air supply spray pipe is formed at the tail end of each air supply spray pipe 20, and a main spray opening 202 which extends towards the longitudinal central axis of the flue gas internal circulation cylinder 10 and forms a second preset angle beta with the central axis 200 of the air supply spray pipe (or with a parallel line 200' parallel to the central axis 200) is formed on the side wall of each spray nozzle 201.
At least one first air outlet 203 is formed on the side wall of each nozzle 201, and a second air outlet 204 is formed at the end of each nozzle. The central points of the ends of the plurality of nozzles 201 are arranged in a ring shape (for example, the second air outlets 204 of the ends of the plurality of nozzles are arranged in a ring shape N), and the injection positions of the plurality of main nozzles 202 are opposite to the position of the longitudinal central axis of the flue gas inner circulation cylinder 10. The first outlet 203 and the second outlet 204 are arranged at the nozzle 201 of the flue gas internal circulation combustor of the embodiment to realize a layered and sectional fuel supply mode, so that the excessive local fuel of the flue gas internal circulation combustor is avoided, the flue gas internal circulation combustor can realize staged combustion and local oxygen-enriched combustion, the temperature of flame is reduced, and the generation of thermal Nox is reduced.
The end of the air supply nozzle 20 is sleeved with a fixing sleeve 205, the nozzle 201 is embedded in the fixing sleeve 205, and a fixing part 206 for fixing the nozzle is installed on the side wall of the fixing sleeve 205. The inclination direction of the nozzle 201 installed at the end of the air supply nozzle can be adjusted by disassembling and assembling the fixing member 206, so that the injection angle of the main nozzle 202 is adjusted, and the combustion uniformity and stability of the flue gas internal circulation combustor are improved.
The flue gas inner loop combustor of this embodiment is to keeping away from the slope of the longitudinal central axis direction of flue gas inner loop section of thick bamboo 10 through the nozzle 201 that each air feed spray tube 20 end formed, be first preset angle alpha with the axis 200 that corresponds the air feed spray tube, the nozzle lateral wall is the second to the main spout 202 that the longitudinal central axis direction of flue gas inner loop section of thick bamboo extends and the axis of air feed spray tube and predetermines angle beta for a plurality of air feed spray tube 201 spun gas that are the annular air feed spray tube of arranging is the heliciform to hang down to the boiler inboard to flue gas inner loop section of thick bamboo 10, in order to realize even combustion. Meanwhile, each nozzle 201 is movably connected with the corresponding gas supply nozzle 20, so that the injection angle of the main nozzle 202 can be changed by adjusting the inclined direction of each nozzle 201, so as to further improve or enhance the combustion uniformity and stability of the flue gas internal circulation combustor, thereby effectively reducing the generation of thermal NOx and enhancing the overall thermal efficiency of the flue gas internal circulation combustor. In this way, the present embodiment solves the problem that the burner in the prior art burns unevenly, so that the generation of thermal NOx cannot be suppressed, and the overall thermal efficiency is low.
The flue gas internal circulation combustor of this embodiment still includes: a gas inner barrel 30; a gas outer cylinder 40 which is sleeved on the gas inner cylinder 30 and the tail end of which is flush with the tail end of the gas inner cylinder; the gas outer cylinder 40 is fixedly provided with a fixed disk 50 which is attached to the tail end of the gas outer cylinder and sleeved on the gas inner cylinder 30 and is penetrated by the plurality of gas supply nozzles 20. The top end of the gas outer cylinder 40 extends from the side wall thereof to the outer side wall of the gas inner cylinder 30 to form a sealed gas channel 400 with the outer side wall of the gas inner cylinder 30. An annular tapered end 501 extends from one side of the fixed disk 50 to a direction far away from the gas inner barrel 30, and the flue gas inner circulation barrel 10 is sleeved on the annular tapered end 501. The gas inner barrel 30 longitudinally penetrates through the central spray pipe 60 extending to the smoke gas inner circulation barrel 10, the end of the central spray pipe 60 is provided with a cyclone disc 70 trapped in the smoke gas inner circulation barrel 10, and the top end of the central spray pipe 60 extends out of the gas inner barrel 30 and forms a gas input port 601 for inputting the first gas R1 into the central spray pipe. The side wall of the gas outer cylinder 40 forms a gas input port 401 through which gas (second gas R2) is input into the sealed gas passage 400. An air input port 301 for inputting air R3 into the gas inner barrel is formed in the side wall of the gas inner barrel 30.
The flue gas internal circulation burner of the embodiment inputs first fuel gas R1 to the central spray pipe 60 through the fuel gas input port 601, the first fuel gas R1 of the central spray pipe 60 is sprayed out to the inner side of the boiler in a spiral manner under the action of the cyclone disk 70, second fuel gas R2 is input to the sealed fuel gas channel 400 formed between the fuel gas outer cylinder 40 and the fuel gas inner cylinder 30 through the fuel gas input port 401, the second fuel gas R2 flows into the air supply spray pipe 20 in the sealed fuel gas channel 400 and is sprayed out in a sectional and layered manner through the main nozzle 202, the first outlet 203 and the second outlet 204 formed by the nozzle 201, meanwhile, air input to the fuel gas inner cylinder 30 through the air input port 301 is circulated to the outer side of the flue gas internal circulation cylinder 10 through the flue gas internal circulation cylinder 10 to be mixed with the first fuel gas R1 sprayed out from the central spray pipe 60 and the second fuel gas R2 sprayed out from the nozzle 201 of the air supply spray pipe to form mixed gas P, and the flame formed by the mixed gas P is spirally and vertically injected to the inner side of the boiler under the action of the cyclone disk 70, thereby further improving the stability of gas combustion.
It should be noted that the flue gas inner circulation tube 10 is fixed to the annular tapered end 501 through the support 101 disposed on the inner wall of the flue gas inner circulation tube, and the flue gas M formed by the combustion of the flue gas inner circulation burner enters the flue gas inner circulation tube 10 through a gap formed between the flue gas inner circulation tube 10 and the annular tapered end 501, so as to improve the circulation utilization rate of the flue gas, reduce the oxygen content conveyed to the flue gas inner circulation tube 10 by the gas inner tube 30, and ensure the sufficient and stable combustion of the flue gas inner circulation burner.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A flue gas internal circulation burner, comprising:
the annular is arranged in a plurality of air feed spray pipes in the flue gas inner loop section of thick bamboo outside, and the end of each air feed spray pipe forms rather than swing joint and to keeping away from the nozzle that the longitudinal axis line direction slope of flue gas inner loop section of thick bamboo and be first preset angle with the axis that corresponds the air feed spray pipe, the lateral wall of nozzle form to the longitudinal axis line direction of flue gas inner loop section of thick bamboo extends and with the axis of air feed spray pipe is the main mouth that the angle was preset to the second.
2. The fume internal circulation burner according to claim 1,
the central points of the tail ends of the nozzles are annularly arranged, and the injection positions of the main nozzles are opposite to the position of the longitudinal central axis of the smoke gas inner circulation cylinder.
3. The fume internal circulation burner according to claim 1,
the side wall of each nozzle forms at least one first air outlet, and the tail end of each nozzle forms a second air outlet.
4. The fume internal circulation burner according to claim 1,
the terminal cover of air feed spray tube is equipped with fixed cover, the nozzle inlay in fixed cover, the lateral wall installation of fixed cover is used for fixing the mounting of nozzle.
5. The in-flue gas recirculation burner according to any of claims 1-4, further comprising:
a gas inner cylinder;
the tail end of the gas outer cylinder is flush with the tail end of the gas inner cylinder;
the gas urceolus sets firmly and arranges and overlap rather than the terminal laminating and establish on the gas inner tube and supply the fixed disk that a plurality of air feed spray tubes run through.
6. The in-flue gas recirculation burner of claim 5,
the top end of the gas outer cylinder extends to the outer side wall of the gas inner cylinder from the side wall of the gas outer cylinder so as to form a sealed gas channel with the outer side wall of the gas inner cylinder.
7. The fume internal circulation burner according to claim 6,
one side direction of fixed disk is kept away from the direction of gas inner tube extends has annular convergent end, flue gas inner loop cover is located annular convergent end.
8. The fume internal circulation burner according to claim 6,
the side wall of the gas outer barrel forms a gas input port for inputting gas into the sealed gas channel.
9. The fume internal circulation burner according to claim 6,
and an air input port for inputting air into the gas inner cylinder is formed in the side wall of the gas inner cylinder.
10. The in-flue gas recirculation burner of claim 5,
the gas inner cylinder is internally and longitudinally penetrated with a central spray pipe which extends to the smoke gas inner circulation cylinder, and the tail end of the central spray pipe is provided with a cyclone disc trapped in the smoke gas inner circulation cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122590397.2U CN216384167U (en) | 2021-10-27 | 2021-10-27 | Flue gas internal circulation combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122590397.2U CN216384167U (en) | 2021-10-27 | 2021-10-27 | Flue gas internal circulation combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216384167U true CN216384167U (en) | 2022-04-26 |
Family
ID=81248700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122590397.2U Active CN216384167U (en) | 2021-10-27 | 2021-10-27 | Flue gas internal circulation combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216384167U (en) |
-
2021
- 2021-10-27 CN CN202122590397.2U patent/CN216384167U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4959620B2 (en) | Combustor and fuel supply method for combustor | |
| US4488869A (en) | High efficiency, low NOX emitting, staged combustion burner | |
| CN111121023B (en) | Fuel side flue gas recirculation nitrogen burner and combustion method thereof | |
| KR101278280B1 (en) | Low nitrogen oxide burner | |
| CN107939551A (en) | A kind of precombustion chamber ejector filler structure | |
| CN110878948B (en) | Gas turbine axial staged combustor and control method thereof | |
| CN102047041A (en) | Fuel injector for low NOx furnace | |
| CN104613473B (en) | A kind of porous gas jet burner | |
| JPH0642710A (en) | Low nox burner system | |
| CN216953044U (en) | Full-premixing flue gas internal circulation low-nitrogen combustor | |
| CN105570890A (en) | Hot flue gas self-circulation type ultra-low NOx combustor | |
| CN110779014A (en) | Flue gas inner loop ultralow nitrogen combustor and boiler | |
| CN216384167U (en) | Flue gas internal circulation combustor | |
| KR101230912B1 (en) | Low nitrogen oxide burner | |
| CN213300081U (en) | Ultralow nitrogen combustor and boiler | |
| CN212029500U (en) | Combustion device and water jacket heating furnace | |
| CN211204047U (en) | Novel low-nitrogen gas burner | |
| CN208253585U (en) | A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type | |
| CN109099425B (en) | Flue gas inner loop ultralow nitrogen combustor | |
| CN204460213U (en) | A kind of porous gas jet burner | |
| CN112113218B (en) | Double-thermal-reflux partially-premixed low-nitrogen combustor and combustion method thereof | |
| JP3959632B2 (en) | Diffusion combustion type low NOx combustor | |
| JP3877440B2 (en) | Burner equipment for heating furnace | |
| CN211146484U (en) | Ultralow nitrogen combustion device | |
| CN214009217U (en) | Double-hot-reflux partially-premixed low-nitrogen combustor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |