CN112815311B - Hollow conical swirling flame low-nitrogen gas burner - Google Patents
Hollow conical swirling flame low-nitrogen gas burner Download PDFInfo
- Publication number
- CN112815311B CN112815311B CN202110146548.7A CN202110146548A CN112815311B CN 112815311 B CN112815311 B CN 112815311B CN 202110146548 A CN202110146548 A CN 202110146548A CN 112815311 B CN112815311 B CN 112815311B
- Authority
- CN
- China
- Prior art keywords
- distributor
- plate
- hollow conical
- air
- gas
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/84—Flame spreading or otherwise shaping
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
A hollow conical swirling flame low-nitrogen gas burner comprises a volute unit and a combustion head unit, wherein the volute unit comprises an air inlet and an air outlet, the air inlet is arranged at the head of the volute unit, the air outlet is arranged on the side surface of the volute unit, and a throat ring is arranged at the air outlet; the combustion head unit comprises a distributor, a nozzle and a cone frustum, the distributor is arranged in the throat ring, a mixing area is arranged between the circumferential surface of the distributor and the inner wall of the throat ring, the distributor is provided with an inner cavity body, and the end surface of the inner side of the distributor is communicated with a fuel gas inlet; the nozzles are provided with an opening end and a gas outlet, a plurality of nozzles are uniformly distributed and installed on the circumferential surface of the distributor, the opening end is communicated with the inner cavity body, a gas cavity is arranged between the opening end and the closed end, and the gas outlet is communicated with the gas cavity and arranged towards the opening of the throat ring; the small end face of the cone frustum is connected with the outer end face of the distributor, the large end face of the cone frustum is arranged outwards and forms a hollow conical rotational flow flame zone with the opening of the throat opening ring, and the hollow inner cavity of the cone frustum forms a flue gas backflow zone.
Description
Technical Field
The invention belongs to the technical field of low-nitrogen combustion of fuel gas, and particularly relates to a hollow conical swirling flame low-nitrogen fuel gas burner.
Background
Nitrogen oxides are one of the main pollution sources causing air pollution, and the national emission index of nitrogen oxides generated by combustion is continuously getting stricter. Currently, mainstream technical means for controlling the NOx emission of a gas burner include Flue Gas Recirculation (FGR), full premix surface combustion, and the like. The flue gas outer circulation (FGR) technology generally extracts flue gas from a tail flue gas outlet, mixes the flue gas with primary air and then sends the mixture into a hearth by a combustion fan. Due to the reduction of the oxygen concentration after mixing and the corrosion of condensed water in the flue gas, the defects of unstable combustion, high CO content, easy surge generation, high failure rate, short service life of a combustor and the like generally exist. The full-premixing surface combustion technology is characterized in that air and fuel gas are mixed in advance in proportion and are combusted on the surface of a metal fiber net, and the air filter net and a metal fiber net burning head are required to be cleaned or replaced irregularly because the metal fiber net has fine meshes and is easy to block, temper and deflagrate; and when the air excess coefficient is low, the content of the nitrogen oxide is high.
The invention patent with application publication number CN109539253A discloses an ultralow-nitrogen gas burner, which comprises a fan and a horizontally arranged connecting cylinder, wherein the fan comprises a volute and a motor arranged on the volute, the volute is provided with an air inlet and an air outlet, the end part of one end of the connecting cylinder is connected with the air outlet of the volute, the other end of the connecting cylinder is connected with a horizontally arranged mixing cylinder through a flange, the connecting cylinder is collinear with the central line of the mixing cylinder, a gas pipe is arranged inside the mixing cylinder, one end of the gas pipe extends out of the outer side of the connecting cylinder through an extending hole arranged on the side wall of the connecting cylinder, and an ignition assembly is arranged on the gas pipe. The volute and the mixing drum are connected through the connecting drum, the structure is complex, the central temperature is too high during combustion, and the thermal nitrogen oxide is easily generated.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the hollow conical swirling flame low-nitrogen gas burner which has low combustion strength and uniform temperature field, greatly reduces the central temperature of flame, can effectively inhibit the generation of thermal nitrogen oxides in the combustion process and realizes low-nitrogen emission.
The technical scheme adopted by the invention is as follows:
the utility model provides a hollow conical whirl flame low NOx gas burner, includes spiral case unit and combustion head unit, the spiral case unit includes air intake and air outlet, its characterized in that: the air inlet is arranged at the head of the volute unit, the air outlet is arranged on the side surface of the volute unit, and a throat ring is arranged at the air outlet;
the burner head unit comprises a gas inlet, a distributor, a nozzle and a cone frustum, the distributor is arranged in the throat ring, a mixing area is formed between the circumferential surface of the distributor and the inner wall of the throat ring, the distributor is provided with an inner cavity body, and the end surface of the inner side of the distributor is communicated with the gas inlet, so that gas can enter the inner cavity body; the nozzles are provided with an opening end, a closed end and a gas outlet, a plurality of nozzles are uniformly distributed and installed on the circumferential surface of the distributor, the opening end is communicated with the inner cavity body, a gas cavity is arranged between the opening end and the closed end, and the gas outlet is communicated with the gas cavity and arranged towards the opening of the throat ring; the cone frustum is of a hollow structure, the small end face of the cone frustum is connected with the outer end face of the distributor, the large end face of the cone frustum is arranged outwards and forms a hollow conical rotational flow flame area with the opening of the throat opening ring, and the hollow inner cavity of the cone frustum forms a flue gas backflow area.
Further, an air passage with a gradually reduced section is arranged between the air inlet and the air outlet of the volute unit to form a rotating air flow.
Furthermore, a plurality of sub-channels are arranged in the air channel to form uniform and stable rotating air flow.
Further, the volute unit comprises an outer side plate and an inner side plate, one side of the outer side plate and one side of the inner side plate are fixedly connected with the lower plate, the other side of the outer side plate and the other side of the inner side plate are connected with the upper plate, the outer side plate, the inner side plate, the upper plate and the lower plate form the air channel, and the outer end parts of the outer side plate and the inner side plate are connected to form the head part of the straight-barrel volute unit.
Further, a guide plate for guiding air to the air outlet is installed between the inner ends of the outer side plate and the inner side plate, and the guide plate is fixed between the upper plate and the lower plate.
Furthermore, an intermediate plate for dividing the air channel into a plurality of sub-channels is arranged in the air channel, and the intermediate plate is fixed between the upper plate and the lower plate.
Further, the air outlet is arranged on the lower plate, and the throat ring is connected with the lower plate.
Further, the combustion head unit also comprises a central pipe, the central pipe penetrates through the upper plate and is communicated with the distributor through the air outlet, and the outer port of the central pipe is a fuel gas inlet.
Furthermore, the outer end of the central tube is connected with a bottom plate, and the bottom plate is fixed on the upper plate.
Furthermore, a plurality of fuel gas outlets are arranged on the nozzle.
The invention has the beneficial effects that:
1. the hollow cone frustum is arranged, so that a hollow conical swirling flame can be formed, the combustion intensity is low, and the temperature field is uniform; and the device is provided with a flue gas reflux area to form flue gas internal circulation, so that the generation of thermal nitrogen oxides in the combustion process can be effectively inhibited, and stable combustion is ensured.
2. The throat ring is arranged, the gas and the high-speed rotating air are premixed before combustion at the throat ring, the gas and the high-speed rotating air are fully mixed, and the content of CO in the flue gas is low.
3. Simple structure, reliability, no risk of tempering and explosion, simple maintenance, no corrosion of condensed water and long service life.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Figure 2 is a schematic view of the volute of the present invention.
Fig. 3 is a schematic view of the structure of the truncated cone of the present invention.
Fig. 4 is a schematic structural view of the nozzle of the present invention.
FIG. 5 is a graph of smoke emission data for use with the present invention.
In the figure, 1-outer plate, 2-inner plate, 3-upper plate, 4-lower plate, 5-middle plate, 6-guide plate, 7-throat ring, 8-central tube, 9-bottom plate, 10-distributor, 11-nozzle and 12-cone frustum.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the invention to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 4, the present embodiment provides a hollow conical swirling flame low-nitrogen gas burner, which includes a volute unit and a burner head unit, wherein the burner head unit is connected to the volute unit.
The volute unit comprises an air inlet and an air outlet, the air inlet is arranged at the head of the volute unit, the air outlet is arranged on the side surface of the volute unit, and a throat ring 7 is arranged at the air outlet; an air channel with a gradually reduced section is arranged between the air inlet and the air outlet of the volute unit to form a rotating air flow, and a plurality of sub-channels are arranged in the air channel to form a uniform and stable rotating air flow.
Specifically, the volute unit comprises an outer side plate 1 and an inner side plate 2, one side of the outer side plate 1 and one side of the inner side plate 2 are fixedly connected with a lower plate 4, the other side of the outer side plate 1 and the other side of the inner side plate 2 are connected with an upper plate 3, the outer side plate 1, the inner side plate 2, the upper plate 3 and the lower plate 4 form the air channel, the outer end parts of the outer side plate 1 and the inner side plate 2 are connected to form the head part of the straight-tube volute unit, namely, the air inlet is formed in the outer end parts of the outer side plate 1 and the inner side plate 2. And a guide plate 6 for guiding air to an air outlet is arranged between the inner ends of the outer side plate 1 and the inner side plate 2, and the guide plate 6 is fixed between the upper plate 3 and the lower plate 4. An intermediate plate 5 for dividing the air passage into a plurality of sub-passages is arranged in the air passage, and the intermediate plate 5 is fixed between the upper plate 3 and the lower plate 4. The air outlet is arranged on the lower plate 4, and the throat ring 7 is connected with the lower plate 4.
The burner head unit comprises a gas inlet, a distributor 10, a nozzle 11 and a cone frustum 12, wherein the distributor 10 is installed in a throat ring 7, a gap between the circumferential surface of the distributor 10 and the inner wall of the throat ring 7 is a mixing area, the distributor 10 is provided with an inner cavity body, and the end surface of the inner side of the distributor 10 is communicated with the gas inlet, so that gas can enter the inner cavity body; the nozzles 11 are provided with an opening end, a closed end and a gas outlet, a plurality of the nozzles 11 are uniformly distributed on the circumferential surface of the distributor 10, the opening end is communicated with the inner cavity body, a gas cavity is arranged between the opening end and the closed end, and the gas outlet is communicated with the gas cavity and is arranged towards the opening of the throat ring 7; the circular truncated cone 12 is a hollow structure, the small end face of the circular truncated cone is connected with the outer end face of the distributor 10, the large end face of the circular truncated cone faces outwards and is exposed out of the throat ring, a hollow conical swirling flame area is formed between the outer peripheral face of the circular truncated cone 12 and the opening of the throat ring 7, and a flue gas backflow area is formed in the hollow inner cavity of the circular truncated cone 12.
Specifically, the combustion head unit comprises a central tube 8, the central tube 8 penetrates through the upper plate 3 and is communicated with the distributor 10 through the air outlet, and the outer port of the central tube 8 is a fuel gas inlet. The outer end of the central tube 8 is connected to a base plate 9, which base plate 9 is fixed to the upper plate 3, thereby connecting the burner head unit to the volute unit. The distributor 10 is a cylinder with a certain diameter and an inner hollow cavity, a through hole is formed in the end face of the inner side of the distributor 10 and communicated with the central tube 8, the end face of the outer side of the distributor 10 is of a closed structure, and a plurality of holes are formed in the circumferential face of the distributor 10. The nozzle 11 is a hollow cylinder structure, one end of the cylinder structure is an open end, the other end of the cylinder structure is a closed end, the hollow area is a gas cavity, a plurality of gas outlets are axially arranged on the circumferential surface, and the open end is inserted into a hole on the circumferential surface of the distributor 10. The truncated cone 12 is angled.
Air required by combustion enters through the air inlet and passes through the volute unit to form uniform and stable rotating air flow, and the air flow is sprayed into the throat ring 7 from the air outlet at a high speed. The gas enters the distributor 10 along the central tube 8, is sprayed out from gas outlets on a plurality of nozzles 11 fixed on the circumference of the distributor 10, is premixed with high-speed rotating air at the throat ring 7 before combustion, the mixed gas is sprayed in at high speed through a cone frustum 12 on the combustion head unit and the throat ring 7 on the volute unit to form hollow conical swirling flame, hollow negative pressure is formed at the hollow inner cavity of the cone frustum 12, high-temperature flue gas is sucked in a rolling mode, a flue gas backflow area is formed, flue gas internal circulation is formed, and stable combustion is guaranteed. The invention has low combustion intensity and uniform temperature field, greatly reduces the central temperature of flame, can effectively inhibit the generation of thermal nitrogen oxides in the combustion process and realizes low nitrogen emission. Meanwhile, the fuel gas and the air are fully mixed, and the content of CO in the flue gas is low.
The invention has been applied to the patent of the invention with patent number ZL201610895821.5 of a horizontal side-burning type coil structure rapid steam generation system, and provides a heat source for the system. The smoke emission data are shown in figure 5, and the emission value of nitrogen oxides is 64.7mg/m3Far below nitrogen specified in GB13271-2014 emission Standard for atmospheric pollutants for boilersSpecific oxide emission limit 150mg/m3。
The above description is only for the fundamental principle and the main features of the present invention, but the protection scope of the present invention is not limited by the above embodiments, and any person skilled in the art can easily think or replace the present invention within the spirit and scope of the present invention disclosed by the present invention, and the present invention is within the protection scope of the present invention.
Claims (10)
1. The utility model provides a hollow conical whirl flame low NOx gas burner, includes spiral case unit and combustion head unit, the spiral case unit includes air intake and air outlet, its characterized in that: the air inlet is arranged at the head of the volute unit, the air outlet is arranged on the side surface of the volute unit, and a throat ring is arranged at the air outlet;
the burner head unit comprises a gas inlet, a distributor, a nozzle and a cone frustum, the distributor is arranged in the throat ring, a mixing area is formed between the circumferential surface of the distributor and the inner wall of the throat ring, the distributor is provided with an inner cavity body, and the end surface of the inner side of the distributor is communicated with the gas inlet, so that gas can enter the inner cavity body; the nozzles are provided with an opening end, a closed end and a gas outlet, a plurality of nozzles are uniformly distributed and installed on the circumferential surface of the distributor, the opening end is communicated with the inner cavity body, a gas cavity is arranged between the opening end and the closed end, and the gas outlet is communicated with the gas cavity and arranged towards the opening of the throat ring; the cone frustum is of a hollow structure, the small end face of the cone frustum is connected with the outer end face of the distributor, the large end face of the cone frustum is arranged outwards and forms a hollow conical rotational flow flame area with the opening of the throat opening ring, and the hollow inner cavity of the cone frustum forms a flue gas backflow area.
2. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 1, wherein: an air channel with a gradually reduced section is arranged between the air inlet and the air outlet of the volute unit to form rotating air flow.
3. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 2, wherein: a plurality of sub-channels are arranged in the air channel to form uniform and stable rotating air flow.
4. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 2, wherein: the volute unit comprises an outer side plate and an inner side plate, one side of the outer side plate and one side of the inner side plate are fixedly connected with a lower plate, the other side of the outer side plate and the other side of the inner side plate are connected with an upper plate, the outer side plate, the inner side plate, the upper plate and the lower plate form an air channel, and the outer end parts of the outer side plate and the inner side plate are connected to form the head part of the straight-tube volute unit.
5. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 4, wherein: and a guide plate for guiding air to the air outlet is arranged between the inner ends of the outer side plate and the inner side plate, and the guide plate is fixed between the upper plate and the lower plate.
6. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 4, wherein: the air channel is internally provided with an intermediate plate which divides the air channel into a plurality of sub-channels, and the intermediate plate is fixed between the upper plate and the lower plate.
7. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 4, wherein: the air outlet is arranged on the lower plate, and the throat ring is connected with the lower plate.
8. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 4, wherein: the combustion head unit further comprises a central pipe, the central pipe penetrates through the upper plate and is communicated with the distributor through the air outlet, and the outer port of the central pipe is a fuel gas inlet.
9. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 8, wherein: the outer end of the central tube is connected with the bottom plate, and the bottom plate is fixed on the upper plate.
10. The hollow conical swirling flame low-nitrogen gas burner as claimed in claim 1, wherein: the nozzle is provided with a plurality of gas outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146548.7A CN112815311B (en) | 2021-02-03 | 2021-02-03 | Hollow conical swirling flame low-nitrogen gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146548.7A CN112815311B (en) | 2021-02-03 | 2021-02-03 | Hollow conical swirling flame low-nitrogen gas burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112815311A CN112815311A (en) | 2021-05-18 |
| CN112815311B true CN112815311B (en) | 2022-05-13 |
Family
ID=75860753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110146548.7A Active CN112815311B (en) | 2021-02-03 | 2021-02-03 | Hollow conical swirling flame low-nitrogen gas burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112815311B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233046Y (en) * | 1995-09-14 | 1996-08-14 | 孙志均 | Injection rotational flow volute gas combustion chamber |
| CN2615511Y (en) * | 2003-04-28 | 2004-05-12 | 南京创能电力科技开发有限公司 | Low-heat valve burner |
| CN102878558A (en) * | 2012-09-13 | 2013-01-16 | 四川大学 | Swirling flow premixing type burner |
| CN106196055A (en) * | 2016-08-15 | 2016-12-07 | 罗诺克兹（北京）能源设备技术有限公司 | A kind of high-power low NO |
| CN107270284A (en) * | 2017-06-19 | 2017-10-20 | 昆明理工大学 | A kind of eddy flow chaos burner and its application process |
| CN109539253A (en) * | 2019-01-17 | 2019-03-29 | 徐州科能燃烧控制科技有限公司 | A kind of ultralow nitrogen gas burner |
| CN210921390U (en) * | 2019-06-27 | 2020-07-03 | 和烁（张家港）热能设备有限公司 | High temperature low oxygen low NOXBurner with a burner head |
| CN111594836A (en) * | 2020-06-19 | 2020-08-28 | 刘迪 | Combustor for gas stove and gas stove |
| CN211781072U (en) * | 2020-03-11 | 2020-10-27 | 温岭市百然机械有限公司 | Low-nitrogen burner air inlet mechanism |
-
2021
- 2021-02-03 CN CN202110146548.7A patent/CN112815311B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233046Y (en) * | 1995-09-14 | 1996-08-14 | 孙志均 | Injection rotational flow volute gas combustion chamber |
| CN2615511Y (en) * | 2003-04-28 | 2004-05-12 | 南京创能电力科技开发有限公司 | Low-heat valve burner |
| CN102878558A (en) * | 2012-09-13 | 2013-01-16 | 四川大学 | Swirling flow premixing type burner |
| CN106196055A (en) * | 2016-08-15 | 2016-12-07 | 罗诺克兹（北京）能源设备技术有限公司 | A kind of high-power low NO |
| CN107270284A (en) * | 2017-06-19 | 2017-10-20 | 昆明理工大学 | A kind of eddy flow chaos burner and its application process |
| CN109539253A (en) * | 2019-01-17 | 2019-03-29 | 徐州科能燃烧控制科技有限公司 | A kind of ultralow nitrogen gas burner |
| CN210921390U (en) * | 2019-06-27 | 2020-07-03 | 和烁（张家港）热能设备有限公司 | High temperature low oxygen low NOXBurner with a burner head |
| CN211781072U (en) * | 2020-03-11 | 2020-10-27 | 温岭市百然机械有限公司 | Low-nitrogen burner air inlet mechanism |
| CN111594836A (en) * | 2020-06-19 | 2020-08-28 | 刘迪 | Combustor for gas stove and gas stove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112815311A (en) | 2021-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205137451U (en) | Force to draw low NOx gas combustion ware of penetrating flue gas backward flow | |
| CN106907712B (en) | The gas nozzle of ultralow nitrogen suspension combustion flame | |
| CN105737203A (en) | Swirler and pre-mixing combustor adopting same | |
| CN111442270A (en) | Flue gas inner loop low-nitrogen gas burner | |
| KR101255698B1 (en) | Low nitrogen oxide burner | |
| CN110469847B (en) | Water-cooled fuel gas ultralow nitrogen combustion device | |
| CN110145737A (en) | A kind of rotational-flow stable-flame radial spray low NO | |
| CN109442411A (en) | A kind of low NO of gaseous fuel | |
| CN212029500U (en) | Combustion device and water jacket heating furnace | |
| CN112815311B (en) | Hollow conical swirling flame low-nitrogen gas burner | |
| CN210463001U (en) | Combustor with low emission of nitrogen oxides | |
| CN107461742B (en) | Graded flameless low-nitrogen combustion head | |
| CN211502762U (en) | Water-cooled gas ultra-low nitrogen combustion device | |
| CN109695875A (en) | A kind of more injection tubular type fire pieces | |
| CN113108277B (en) | Ultralow NO of medium and small boilerxCO discharging gas burner | |
| CN115143459A (en) | Injection premixing smoke internal circulation low-nitrogen combustor | |
| CN211260793U (en) | Secondary air low-nitrogen combustor | |
| CN213089813U (en) | Flue gas inner loop type low nitrogen structure | |
| CN111121005B (en) | Decoupling gas burner and using method thereof | |
| CN218001492U (en) | Conical low-nitrogen gas burner | |
| CN209639002U (en) | A kind of more injection tubular type fire pieces | |
| CN217274119U (en) | Ultra-low nitrogen combustion head for gas burner | |
| CN219199164U (en) | Dual cycle low nitrogen combustor | |
| CN215336318U (en) | Low-pollution burner head structure | |
| CN218237459U (en) | Ultralow nitrogen gas burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |