CN212339239U - Porous ceramic combustion head for low-nitrogen combustor - Google Patents
Porous ceramic combustion head for low-nitrogen combustor Download PDFInfo
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- CN212339239U CN212339239U CN202021312747.8U CN202021312747U CN212339239U CN 212339239 U CN212339239 U CN 212339239U CN 202021312747 U CN202021312747 U CN 202021312747U CN 212339239 U CN212339239 U CN 212339239U
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Abstract
The utility model discloses a porous ceramic combustion head for a low-nitrogen burner, which comprises a combustion head shell and an inner air cylinder; a fire hole plate is arranged at an opening at the top of the combustion head shell and comprises at least two porous medium ceramic plates, and an internal protection plate with holes is arranged on the inner side of each porous medium ceramic plate; the inner air duct is inserted into the combustion head shell, and a plurality of ventilation openings are formed in the surface of the inner air duct. The combustion head of the utility model has high combustion efficiency and low discharge of CO and NOx; has double anti-backfire protection functions and reliable safety performance; the uniform distribution of air flow can be realized, the fuel premixing is promoted to be uniform, and the combustion condition is stable.
Description
Technical Field
The utility model relates to a gas burner technical field, concretely relates to porous ceramic burning head for low-nitrogen burner.
Background
The heat load of the vertical heating furnace in the current market is mainly below 1MW, and the vertical heating furnace is mainly matched with a simple partial premixing type gas burner. When in use, the gas valve and the air distribution mechanism need to be manually adjusted, and the air-fuel ratio is manually adjusted. Fuel often burns under the unreasonable condition of surplus air coefficient, and the burning is insufficient or exhaust gas temperature is too high, and fuel does not obtain rational utilization, extravagant energy on the one hand, and on the other hand is because heating furnace structure size and partial simple and easy combustor that mixes are mostly injection type structure, and the primary air supplies inadequately, and the secondary air supplies unevenly, and flame is longer, and the flue gas velocity of flow is fast, and dwell time is short in the stove again, and pollutant generation volume is more.
With the increasingly prominent environmental problems, the establishment of standards of related gas fuel combustion appliances at home and abroad and the implementation of nitrogen oxide control measures by government environmental protection departments, more and more low-nitrogen combustion technologies are applied to the field of combustion technologies. The nitrogen reduction means adopted by the low-nitrogen burner in the current market comprises a flue gas recirculation technology and a full premix combustion technology, wherein the flue gas recirculation technology is mainly applied to a larger gas boiler, and a small gas heating furnace mainly adopts the full premix combustion technology. Fully premixed combustion refers to the process of thoroughly mixing the gas and all the air required before the fire hole of the burner and then rapidly and completely burning after the fire hole. The combustion speed of the full-premixing combustion is high, the combustion is complete, the integral temperature of the flame is low relative to the temperature of the flame in the partial-premixing combustion, and the emission of nitrogen oxides is low. At present, most of the complete premix burners at home and abroad are flat plates and cylinders. In practical application, the flat-plate type combustor fire hole medium is mostly made of metal fiber materials and porous ceramic plate materials, the metal fiber materials and the porous ceramic plate materials have high manufacturing cost, if the metal fiber materials and the porous ceramic plate materials are partially blocked, the metal fiber materials and the porous ceramic plate materials are possibly oxidized and corroded to be damaged after being used in a high-temperature environment for a long time, the metal fiber materials and the porous ceramic plate materials are low in hardness and easy to crack, and if the metal fiber materials and the porous ceramic plate materials are damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an use the natural gas as fuel, combustion efficiency is high, nitrogen discharges low complete premixing formula low nitrogen combustor with porous ceramic combustion head to solve the current technical problem who exists with the flat combustor of porous ceramic board as the fire hole medium.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
A porous ceramic combustion head for a low-nitrogen burner comprises a combustion head shell and an inner air duct; a fire hole plate is arranged at an opening at the top of the combustion head shell and comprises at least two porous medium ceramic plates, and an internal protection plate with holes is arranged on the inner side of each porous medium ceramic plate; the inner air duct is inserted into the combustion head shell, and a plurality of ventilation openings are formed in the surface of the inner air duct.
Further, the combustion head shell 1 is mainly formed by combining a front end plate 13, an upper plate 14, a lower plate 15 and a rear end plate 16; the inner air duct 2 is inserted into the combustion head shell 1 from a through hole formed in the front end plate 13 and is connected with the front end plate 13 in a sealing manner; the upper plate 14 is provided with at least two openings, the internal protection plate 4 is arranged at the openings from the inner side of the upper plate 14, and the porous medium ceramic plate 3 is arranged at the openings from the outer side of the upper plate 14; one or more sewage holes are provided in the rear end plate 16.
Further, the upper plate 14 includes two top surfaces that are the contained angle, is equipped with one or more opening on every top surface, and the outside of every opening part is equipped with one or more porous medium ceramic plate 3, and the inboard of every opening part is equipped with one or more inside guard plate 4.
Further, the edge of the porous medium ceramic plate 3 is provided with a fire guiding sheet 8, and the fire guiding sheet 8 is provided with a circular heat dissipation hole or a strip-shaped heat dissipation hole.
Further, the fuse 8 includes a first fuse 81 and a second fuse 82, which are respectively located on the top of the two top surfaces.
Further, the porous medium ceramic plate 3 is fixed on the upper plate 14 through a plurality of press plates, and the joint of the porous medium ceramic plate 3 and the upper plate 14 is sealed by high temperature resistant glue.
Furthermore, round holes and/or strip-shaped holes are densely arranged on the internal protection plate 4.
Further, interior dryer 2 includes the play dryer 10 of front end and the connecting cylinder 12 of rear end, play dryer 10 is located 1 inside the first casing of burning, connecting cylinder 12 is located 1 outside the first casing of burning, the tip of connecting cylinder 12 is provided with mounting flange 11, a plurality of vents 17 close-packed settings are in the surface of play dryer 10.
Further, the apertures of the plurality of ventilation openings 17 are gradually increased from the front end to the rear end of the inner wind tube 2.
Further, the total area of the openings of the plurality of ventilation openings 17 corresponds to the inlet area of the mounting flange 11.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
the utility model discloses a burning head, compact structure, combustion efficiency is high, and CO and NOx emission are low.
The utility model discloses a combustion head, the fire hole board that its fire hole face was established, including two or two above porous medium ceramic plates, can be as required the heat load, adjustment porous medium ceramic plate quantity reduces the area of single porous medium ceramic plate, from can effectively reducing the thermal stress deformation that the fire hole board arouses because the temperature risees and cracked, in addition, set up inside guard plate below the porous medium ceramic plate, the bilayer structure who constitutes together can realize dual anti-backfire protect function, and the security performance is more reliable.
The utility model discloses a combustion head, inside has set up interior dryer, can realize becoming evenly distributed air current under the load condition, make the fuel mix in advance evenly, utilize the utility model discloses a combustion mode that gas fuel mixes in advance completely can be realized to the combustor, and the burning operating mode is stable.
Therefore, the combustion head of the utility model has high combustion efficiency and low emission of CO and NOx; has double anti-backfire protection functions and reliable safety performance; the uniform distribution of air flow can be realized, the fuel premixing is promoted to be uniform, and the combustion condition is stable. The utility model discloses a burner not only can be used to middle-size and small-size industry heating system, also can be used to the heat supply that can be used to civilian and commercial usefulness and supply life hot water system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments and the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a porous ceramic burner head for a low-nitrogen burner according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a burner head housing according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an inner wind tube in an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The following will explain details by way of specific examples.
Referring to fig. 1 to 3, an embodiment of the present invention provides a porous ceramic burner head (hereinafter referred to as burner head) for a low-nitrogen burner.
The combustion head comprises a combustion head shell 1 and an inner air duct 2; a fire hole plate is arranged at an opening at the top of the combustion head shell 1, the fire hole plate comprises at least two porous medium ceramic plates 3, and an internal protection plate 4 is arranged on the inner side of each porous medium ceramic plate 3; the inner air duct 2 is inserted into the combustion head shell 1, and a plurality of ventilation openings 17 are formed in the surface of the inner air duct 2.
Wherein, the fire hole plate can adjust the number of the porous medium ceramic plates 3 according to the required heat load, and change the area of a single porous medium ceramic plate. The porous medium ceramic plate 3 and the inner shield plate 4 each have densely arranged through holes to allow the gas fuel to pass therethrough. Optionally, through holes in the form of round holes and/or strip-shaped holes are densely arranged on the inner protection plate 4, and the anti-backfire function is achieved. Optionally, the width gap of the strip-shaped hole is between 0.5 and 1.5mm, the porosity of the strip-shaped hole is between 50 and 60 percent, and the thickness of the strip-shaped hole is between 1 and 8 mm; the aperture of the round hole is between 1 and 2mm, and the porosity is between 40 and 60 percent; the thickness of the inner protection plate 4 is between 3 and 10 mm.
The combustion head housing 1 is mainly formed by combining a front end plate 13, an upper plate 14, a lower plate 15 and a rear end plate 16, and a hollow inner cavity is formed inside the combustion head housing. The front end plate is provided with a through hole, and the inner air duct 2 is inserted into the combustion head shell 1 from the through hole formed in the front end plate 13 and is connected with the front end plate 13 in a sealing manner. The upper plate 14 is provided with at least two openings to form a fire hole surface; the inner shield plate 4 is provided at the opening from the inner side of the upper plate 14, and the porous medium ceramic plate 3 is provided at the opening from the outer side of the upper plate 14; the internal shield plates 4 and the porous medium ceramic plates 3 together constitute a double-layered fire-hole plate. The rear end plate 16 is provided with one or more drain holes, for example 1-3 drain holes.
Optionally, the upper plate 14 includes two top surfaces forming an included angle, each top surface is provided with one or more openings, the outer side of each opening is provided with one or more porous medium ceramic plates 3, and the inner side of each opening is provided with one or more internal protection plates 4.
Optionally, the porous medium ceramic plate 3 is fixed on the upper plate 14 through a plurality of pressing plates, and the pressing plates may be provided with mounting holes and mounted on the upper plate 14 through bolts. Wherein the press plates may include a Z-type press plate 5 and a n-type press plate 7. A pressure plate 7 of a n-type is provided between the two top surfaces and has two press pins for fixing the upper edges of the porous dielectric ceramic plates 3 provided on the two top surfaces, respectively. Z-type press plates 5 are provided in a dispersed manner for fixing the lower edge, the left edge and the edge of the porous medium ceramic plate 3, respectively.
Optionally, the joint of the porous medium ceramic plate 3 and the upper plate 14 is sealed by high temperature resistant glue, so as to prevent the mixed gas from leaking out of the edge and burning the metal frame of the surrounding burner head shell. The high-temperature resistant glue can be Shilin SL8081 high-temperature resistant sealant, for example.
Optionally, the edge of the porous medium ceramic plate 3 is provided with a fire guiding sheet 8, the fire guiding sheet is used for disturbing flow flame to play a role in stabilizing combustion, and is provided with a circular heat dissipation hole or a strip-shaped heat dissipation hole and a fixing hole for mounting and fixing. Further, the fuse pieces 8 include a first fuse piece 81 and a second fuse piece 82, which are respectively located on the top of the two top surfaces; two sides of the top of one of the top surfaces may be respectively provided with a first fuse panel 81, and two sides of the top of the other top surface may be respectively provided with a second fuse panel 82. Optionally, the fire guiding plate 8 may be mounted on the Z-shaped pressing plate 5 through a fixing hole. Further, the fuse 8 and the Z-shaped pressing plate 5 can be spaced by a heat insulation spacer 6.
Optionally, interior dryer 2 includes the connecting cylinder 12 of front end air-out cylinder 10 and rear end, air-out cylinder 10 is located 1 inside the combustion head casing, connecting cylinder 12 is located 1 outside the combustion head casing, the close-packed setting of a plurality of vents 17 is in the surface of air-out cylinder 10, the tip of connecting cylinder 12 is provided with mounting flange 11. Wherein, between connecting cylinder 12 and mounting flange 11 to and between connecting cylinder 12 and the front end plate 13 of combustion head casing 1, all can be connected through the welding mode.
Optionally, the apertures of the plurality of ventilation openings 17 gradually increase from the front end to the rear end of the inner air duct 2.
Alternatively, the total area of the openings of the plurality of ventilation openings 17 corresponds to the inlet area of the mounting flange 11.
As above, the utility model discloses a porous ceramic combustion head for low nitrogen combustor mainly includes components such as combustion head casing 1, interior wind section of thick bamboo 2, porous medium ceramic plate 3, inside guard plate 4, can further include components such as mounting flange 11, clamp plate, fire guide piece 8, heat insulating gasket 6. Wherein, except the heat insulation gasket 6, other components can be made of high temperature resistant stainless steel. When the burner head works, gas fuel formed by completely premixing gas and air can enter the inner air tube 2 from one side of the mounting flange 11, enter the inside of the burner head shell 1 from the vent 17 on the inner air tube 2, and then overflow through the through hole on the fire hole plate to burn. Wherein, the fire hole board includes that inside guard plate 4 and porous medium ceramic plate 3 are two-layer, can realize dual anti-backfire protection. The fire guiding sheet 8 is provided with round holes or strip-shaped heat dissipation holes for disturbing flow flame to play a role in stabilizing combustion. Interior dryer 2 can be according to the length that the interior dryer needs of the length matching of combustion head, sets up the close-packed vent on the interior dryer 2, and the aperture is by inside to outside grow gradually, and the total area of trompil is close with the mounting flange import, can realize evenly distributed air current under the variable load condition, makes fuel and air premix evenly.
To sum up, the embodiment of the utility model provides a combustion head, through adopting as above technical scheme, gain following technological effect.
The utility model discloses a burning head, compact structure, combustion efficiency is high, and CO and NOx emission are low.
The utility model discloses a combustion head, the fire hole board that its fire hole face was established, including two or two above porous medium ceramic plates, can be as required the heat load, adjustment porous medium ceramic plate quantity reduces the area of single porous medium ceramic plate, from can effectively reducing the thermal stress deformation that the fire hole board arouses because the temperature risees and cracked, in addition, set up inside guard plate below the porous medium ceramic plate, the bilayer structure who constitutes together can realize dual anti-backfire protect function, and the security performance is more reliable.
The utility model discloses a combustion head, inside has set up interior dryer, can realize becoming evenly distributed air current under the load condition, make the fuel mix in advance evenly, utilize the utility model discloses a combustion mode that gas fuel mixes in advance completely can be realized to the combustor, and the burning operating mode is stable.
Therefore, the combustion head of the utility model has high combustion efficiency and low emission of CO and NOx; has double anti-backfire protection functions and reliable safety performance; the uniform distribution of air flow can be realized, the fuel premixing is promoted to be uniform, and the combustion condition is stable. The utility model discloses a burner not only can be used to middle-size and small-size industry heating system, also can be used to the heat supply that can be used to civilian and commercial usefulness and supply life hot water system.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A porous ceramic combustion head for a low-nitrogen burner is characterized in that,
comprises a combustion head shell (1) and an inner air cylinder (2);
a fire hole plate is arranged at an opening at the top of the combustion head shell (1), the fire hole plate comprises at least two porous medium ceramic plates (3), and an internal protection plate (4) is arranged on the inner side of each porous medium ceramic plate (3);
the inner air duct (2) is inserted into the combustion head shell (1), and a plurality of ventilation openings (17) are formed in the surface of the inner air duct (2).
2. The porous ceramic burner head for a low-nitrogen burner according to claim 1,
the combustion head shell (1) is mainly formed by combining a front end plate (13), an upper plate (14), a lower plate (15) and a rear end plate (16);
the inner air duct (2) is inserted into the combustion head shell (1) from a through hole formed in the front end plate (13) and is in sealed connection with the front end plate (13);
the upper plate (14) is provided with at least two openings, the internal protection plate (4) is arranged at the openings from the inner side of the upper plate (14), and the porous medium ceramic plate (3) is arranged at the openings from the outer side of the upper plate (14);
one or more sewage draining holes are arranged on the rear end plate (16).
3. The porous ceramic burner head for a low-nitrogen burner according to claim 2,
the upper plate (14) comprises two top surfaces which form an included angle, one or more openings are formed in each top surface, one or more porous medium ceramic plates (3) are arranged on the outer side of each opening, and one or more internal protection plates (4) are arranged on the inner side of each opening.
4. The porous ceramic burner head for a low-nitrogen burner according to claim 3,
the edge of the porous medium ceramic plate (3) is provided with a fire guiding sheet (8), and the fire guiding sheet (8) is provided with round heat dissipation holes or strip-shaped heat dissipation holes.
5. The porous ceramic burner head for a low-nitrogen burner according to claim 4,
the fire guiding sheet (8) comprises a first fire guiding sheet (81) and a second fire guiding sheet (82) which are respectively positioned at the tops of the two top surfaces.
6. The porous ceramic burner head for a low-nitrogen burner according to claim 2,
the porous medium ceramic plate (3) is fixed on the upper plate (14) through a plurality of press plates, and the joint of the porous medium ceramic plate (3) and the upper plate (14) is sealed by high-temperature-resistant glue.
7. The porous ceramic burner head for a low-nitrogen burner according to claim 1,
round holes and/or strip-shaped holes are densely arranged on the internal protection plate (4).
8. The porous ceramic burner head for a low-nitrogen burner according to claim 1,
interior dryer (2) include play dryer (10) and connecting cylinder (12) of rear end of front end, play dryer (10) are located combustion head casing (1) is inside, connecting cylinder (12) are located combustion head casing (1) is outside, the tip of connecting cylinder (12) is provided with mounting flange (11), a plurality of vents (17) are densely arranged and are set up the surface of play dryer (10).
9. The porous ceramic burner head for a low-nitrogen burner according to claim 8,
from the front end to the rear end of interior dryer (2), the aperture of a plurality of vent (17) increases gradually.
10. The porous ceramic burner head for a low-nitrogen burner according to claim 8,
the total area of the openings of the plurality of ventilation openings (17) is equivalent to the inlet area of the mounting flange (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312747.8U CN212339239U (en) | 2020-07-07 | 2020-07-07 | Porous ceramic combustion head for low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021312747.8U CN212339239U (en) | 2020-07-07 | 2020-07-07 | Porous ceramic combustion head for low-nitrogen combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212339239U true CN212339239U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021312747.8U Active CN212339239U (en) | 2020-07-07 | 2020-07-07 | Porous ceramic combustion head for low-nitrogen combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212339239U (en) |
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- 2020-07-07 CN CN202021312747.8U patent/CN212339239U/en active Active
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