CN110631017B - Double-rotation thin-wall fire-shaped combustion head for low-nitrogen combustor - Google Patents
Double-rotation thin-wall fire-shaped combustion head for low-nitrogen combustor Download PDFInfo
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- CN110631017B CN110631017B CN201911036695.8A CN201911036695A CN110631017B CN 110631017 B CN110631017 B CN 110631017B CN 201911036695 A CN201911036695 A CN 201911036695A CN 110631017 B CN110631017 B CN 110631017B
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- 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
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
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- 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
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
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- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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Abstract
The invention discloses a double-rotation thin-wall fire-shaped combustion head for a low-nitrogen burner, which comprises an air duct, a gas pipe, a nozzle and a flame stabilizing disc, wherein the gas pipe, the nozzle and the flame stabilizing disc are arranged in an air supply channel in the air duct; the nozzle comprises a plurality of outer nozzles, a primary air distribution hole facing the primary air channel and a secondary air distribution hole facing the secondary air channel are formed in the outer nozzles, and in all fuel gas sprayed by the nozzles, the proportion of the primary air distribution hole is 80% -90%, and the proportion of the secondary air distribution hole is 10% -20%. The invention comprehensively utilizes FIR and central flame stabilizing technology, and ensures combustion intensity and combustion stability while reducing nitrogen; and the flame size and shape can be adjusted by adjusting the length of the combustion air duct, so that the boiler is suitable for different boiler requirements.
Description
Technical Field
The invention relates to the technical field of gas burners, in particular to a double-rotation thin-wall fire-shaped combustion head for a low-nitrogen burner.
Background
National environmental protection policy is becoming stricter and the requirement for boiler nitrogen oxide emission is becoming higher and higher. The nitrogen reduction means adopted by the low-nitrogen combustor in the current market comprises an FGR (flue gas Recirculation) technology and a premixed combustion technology, and has the inevitable defect while achieving the nitrogen reduction effect. For example, a burner using the FGR technology is prone to problems such as flue gas condensate corrosion and surge; the problems of low thermal efficiency and tempering risk caused by high oxygen content of flue gas easily occur by adopting a premixed combustion technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the double-spiral thin-wall burner head for the low-nitrogen burner, which has high thermal efficiency, high safety and stable combustion.
The technical scheme is as follows:
a double-rotation thin-wall fire-shaped combustion head for a low-nitrogen burner comprises an air duct, and a gas pipe and a nozzle which are arranged in an air supply channel in the air duct, wherein the gas pipe is connected with the nozzle, a flame stabilizing disc positioned at the tail end of the air supply channel is arranged in the air duct, the nozzle comprises a plurality of outer nozzles which are uniformly distributed on the edge of the flame stabilizing disc in the circumferential direction, and the gas pipe comprises a gas main pipe and a plurality of gas branch pipes which are used for connecting the gas main pipe and the plurality of outer nozzles; a gap is formed between the flame stabilizing disc and the air duct to form a primary air duct, a through hole is formed in the flame stabilizing disc to form a secondary air duct, a round hole is formed in the center of the flame stabilizing disc, a rotational flow drum is arranged in the round hole to form a tertiary air duct, and the air supply quantity of the primary air duct is larger than the secondary air duct and larger than the tertiary air duct; the outer nozzle is provided with a primary air distribution hole facing the primary air duct and a secondary air distribution hole facing the secondary air duct, and the volume of the primary air distribution hole is 80-90% and the volume of the secondary air distribution hole is 10-20% of all fuel gas sprayed by the nozzle.
In a possible implementation manner, a movable adjustable air outlet is sleeved on the inner side of the tail end of the air duct, and the adjustable air outlet moves back and forth relative to the air duct so that the length of the air supply channel is adjustable.
In a possible implementation manner, a pull rod connected with the adjustable air outlet and used for adjusting the adjustable air outlet is further arranged inside the air duct.
In a possible implementation manner, the outlet of the adjustable air outlet is a straight opening or a reduced opening.
In one possible implementation mode, a plurality of spiral-flow sheets are radially and circumferentially and uniformly distributed on the flame stabilizing disc, a certain included angle is formed between each spiral-flow sheet and the corresponding flame stabilizing disc, so that a spiral-flow channel is formed, and the plurality of spiral-flow channels and the plurality of through holes formed in the disc surface of the flame stabilizing disc jointly form the secondary air duct.
In a possible implementation manner, the swirling flow channel further includes a long and narrow through hole formed in the disk surface of the flame stabilizing disk and corresponding to the swirling sheet.
In a possible implementation manner, a swirl flame isolation area is formed between every two swirl plates, and the outer nozzle is located at the outer edge of the swirl flame isolation area.
In one possible implementation mode, the cyclone cylinder comprises an inner cylinder, an outer cylinder and a plurality of rotary vanes connected between the inner cylinder and the outer cylinder, an air duct is formed between the rotary vanes, wherein openings are not formed in the two ends of the inner cylinder in a plugging mode, and the rotary vanes and the axis of the cyclone cylinder form a certain included angle which is smaller than 45 degrees.
In a possible implementation manner, the number of the gas branch pipes is between 4 and 12; each outer nozzle is provided with 1-3 large holes serving as primary air distribution holes towards the direction of a primary air duct, and the aperture of each primary air distribution hole is 10-25 mm; and 1-3 small holes serving as secondary air distribution holes are respectively formed in the plurality of outer nozzles which are mutually spaced towards the direction of the cyclone cylinder, and the aperture of each secondary air distribution hole is 3-10 mm.
In one possible implementation, the gas main pipe and the air supply channel are coaxially arranged, and a plurality of gas branch pipes connected to the downstream of the gas main pipe are circumferentially and uniformly distributed by taking the gas main pipe as a center.
In one possible implementation manner, the flame formed by the combustion at the tail end of the combustion head sequentially comprises a flame stabilizing area, a main combustion area and a backflow area from the nozzle to the outside, wherein the main combustion area is formed by mixing and combusting gas supplied by a primary air distribution hole and combustion-supporting air coming out of a primary air duct and is diffusion combustion; the fuel gas supplied by the secondary air distribution hole and the combustion-supporting air from the secondary air duct are mixed with the transition plate and rotate to burn to form the stable flame area, and the stable flame area is oxygen-enriched combustion; the tertiary air duct supplies combustion-supporting air for the flame in the main combustion area of the outer ring, so that the flame in the main combustion area is in a thin-wall bell shape; the far end of the center of the flame flow field forms a negative pressure backflow area.
In conclusion, the invention provides a double-rotation thin-wall fire-shaped combustion head for a low-nitrogen combustor, and by adopting the technical scheme, the invention achieves the following technical effects:
1. the smoke gas internal circulation technology (FIR) and the central flame stabilizing technology are comprehensively utilized, so that the combustion intensity and the combustion stability are ensured while the nitrogen is reduced;
2. by adjusting the adjustable air outlet, the length of the air supply channel can be adjusted to adjust the size and shape of the flame, so that the adjustable air supply channel is suitable for different boiler requirements.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.
FIG. 1 is a cross-sectional view of a dual-swirl thin-walled burner head for a low-nitrogen burner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a relative position relationship between a gas distribution system of a double-spiral thin-wall burner head for a low-nitrogen burner and a flame stabilizing disk according to an embodiment of the present invention;
FIG. 3 is a schematic view of the flow field of the flame formed by the dual-swirl thin-wall burner head for a low-nitrogen burner in accordance with an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following will explain details by way of specific examples.
Referring to fig. 1 and 2, a dual-swirl thin-wall burner head (hereinafter referred to as burner head) for a low-nitrogen burner is provided according to an embodiment of the present invention.
The combustion head provided by the embodiment mainly comprises an air duct 1, a gas pipe 2, a pull rod 3, an adjustable air outlet 4, an outer nozzle 5 and a flame stabilizing disc 6. The gas pipe 2 comprises a gas main pipe 2-0 and a plurality of gas branch pipes 2-1.
The fuel gas main pipe 2-0 is positioned in an air supply channel formed in the air duct 1 and is coaxially arranged, the downstream of the fuel gas main pipe is communicated with a plurality of, for example, 12 fuel gas branch pipes 2-1 which are uniformly distributed in the circumferential direction, the tail end of the fuel gas main pipe 2-0 is closed, the fuel gas branch pipe 2-1 is connected with an outer nozzle 5, and a fuel gas distribution system positioned in the air supply channel is formed by the fuel gas main pipe 2-0, the fuel gas branch pipe 2-1 and the outer nozzle 5 and is used for conveying and distributing fuel gas.
The movable adjustable air outlet 4 is sleeved on the inner side of the tail end of the air duct 1, and an air supply channel is formed inside the air duct 1 and the adjustable air outlet 4 and used for conveying and supplying combustion-supporting air. In the embodiment, the FIR technology is utilized, and the delivered combustion-supporting air can comprise air and flue gas generated by combustion of the combustor. The essence of the FIR technology is that the flue gas generated by combustion is reintroduced into a combustion area to realize the control of the concentration of oxides at the combustion temperature, thereby realizing the effects of reducing the emission of nitrogen oxides and saving energy.
Optionally, the adjustable air outlet 4 is connected to the pull rod 3, and a user can adjust the adjustable air outlet 4 to move relative to the air duct 1 by adjusting the pull rod 3, so as to change the length of the air supply channel.
Optionally, the outlet of the adjustable air outlet is a throat, that is, the diameter is gradually reduced from inside to outside. Or the outlet of the adjustable air outlet can be a straight opening, namely the inner diameter and the outer diameter are consistent.
In this embodiment, the flame stabilizing disc 6 is disc-shaped, and is disposed at the downstream outlet of the air supply channel and is coaxial with the air supply channel. The flame stabilizing disc 6 comprises a disc surface 6-2, a disc edge 6-3 and a vortex sheet 6-1 arranged on the outer side of the disc surface 6-2, wherein a large round hole is formed in the center of the disc surface 6-2, and a plurality of small through holes 6-4 are formed in the disc surface 6-2 to serve as combustion-supporting air channels. A plurality of swirl vanes 6-1, for example 12 swirl vanes are uniformly distributed on the flame stabilizing disc 6 in a radial circumferential direction, and the swirl vanes 6-1 and the disc surface of the flame stabilizing disc 6 form a certain included angle to jointly form a swirl channel. Optionally, a long and narrow through hole 6-5 penetrating through the flame stabilizing disc 6 is further formed in the position, corresponding to the rotational flow sheet 6-1, on the flame stabilizing disc 6, and is used as a component of the rotational flow channel; the combustion-supporting air can pass through the long and narrow through hole 6-5, and the passing combustion-supporting air turns under the action of the vortex sheet 6-1 and flows in a rotating mode along the disc surface of the flame stabilizing disc 6.
In this embodiment, the gap between the flame stabilizing disc 6 and the adjustable air outlet 4 forms a primary air duct 9-1. The flame stabilizing disc 6 is provided with a plurality of small through holes 6-4 and a plurality of rotational flow channels which together form a secondary air duct 9-2. And a circular hole formed in the center of the flame stabilizing disc 6 is internally provided with a cyclone cylinder 7 to form a tertiary air duct.
The cyclone cylinder 7 is cylindrical and comprises an inner cylinder 7-1, an outer cylinder 7-2 and a plurality of rotary vanes 7-3 connected between the inner cylinder and the outer cylinder, wherein an air channel is formed between the rotary vanes 7-3, two ends of the inner cylinder 7-1 are plugged without openings, and the rotary vanes 7-3 form a certain included angle with the axis of the cyclone cylinder. Optionally, the included angle is less than 45 degrees, and preferably the included angle is between 5 ° and 15 °.
In this embodiment, the air from the secondary air duct 9-2 rotates along the disk surface of the flame stabilizing disk 6 under the action of the rotational flow passage, and the air from the tertiary air duct 9-3 rotates under the action of the rotational flow barrel 7. Optionally, the rotational direction of the air from the secondary air duct 9-2 and the tertiary air duct 9-3 is the same by setting the angle/direction of the rotational flow plate 6-1 and the rotational flow plate 7-3.
In this embodiment, each outer nozzle 5 is provided with a plurality of adjacent large holes as primary air distribution holes 8-1 in the primary air duct direction, for example, each outer nozzle 5 is provided with 2 adjacent large holes in the primary air duct direction, and 24 large holes in total are the primary air distribution holes 8-1. A plurality of, for example, 2 small holes are respectively arranged on 6 outer nozzles 5 at intervals in the 12 outer nozzles in the direction of a cyclone cylinder 7 (namely the direction of a secondary air duct), and the total 12 small holes are used as secondary air distribution holes 8-2. It should be noted that the macro pores and the micro pores are relative sizes therebetween, that is, the pore diameter of the primary air distribution pores is larger than that of the secondary air distribution pores.
In this embodiment, a swirl flame isolation region is formed between every two adjacent swirl plates 6-1 on the flame stabilizing disc 6. The outer nozzle 5 penetrates through the disc edge 6-3 of the flame stabilizing disc 6 and is positioned at the outer edge of the swirl flame isolation area. The swirl flame isolation region has the function of relatively isolating gas injected inwards from the secondary gas distribution holes 8-2 on each outer nozzle 5, preventing high temperature caused by fire crossing generated by secondary gas distribution, and reducing the flame temperature to play a role of nitrogen reduction.
Further, in some embodiments,
the number of the gas branch pipes is 4-12, preferably 6-10;
the aperture of the primary air distribution hole is 10-25 mm, preferably 12-18 mm;
the aperture of the secondary air distribution hole is 3-10 mm, preferably 3-6 mm;
each outer nozzle can be provided with 1-3 primary air distribution holes, preferably 2; wherein, each outer nozzle of a plurality of outer nozzles which are mutually spaced can be provided with 1-3 primary air distribution holes, preferably 2.
The operating principle of the double-rotation thin-wall fire-shaped combustion head for the low-nitrogen combustor in the embodiment is as follows:
combustion-supporting air is supplied in the air supply channel, and due to the fact that the flame stabilizing disc is arranged at the downstream of the air supply channel for shunting, most of air flows away from the primary air channel, and a small part of air flows away from the secondary air channel and the tertiary air channel. The fuel distribution system is internally supplied with fuel gas, most of the fuel gas is supplied to the primary air channel from the primary air distribution hole (the volume accounts for 80% -90%), and a small part of the fuel gas (the volume accounts for 10% -20%) is supplied to the secondary air channel from the secondary air distribution hole.
Referring to the schematic diagram of the flame flow field shown in fig. 3, the gas supplied from the primary gas distribution hole is mixed with the air from the primary air duct and burned to form a primary combustion area, which is diffusion combustion; the fuel gas from the secondary air distribution hole and the combustion-supporting air from the secondary air duct are mixed and rotate along the circle for combustion, and oxygen-enriched combustion is realized and a flame stabilizing area is formed; the tertiary air channel supplies combustion-supporting air for the flame in the main combustion area of the outer ring, and the flame in the main combustion area is in a thin-wall bell shape because no fuel gas exists in the center of the whole flow field, so that the temperature of the flame in the shape of a fire is low, and the generation of nitrogen oxides can be reduced; the far end of the center of the flow field forms a negative pressure backflow area. The pull rod is pulled to drive the adjustable air outlet to move back and forth, and the air distribution ratio can be changed, so that the length and the thickness of flame can be adjusted.
The fuel gas is supplied by dividing the whole flow field into a middle ring and an outer ring to form staged combustion, which is an important means for reducing nitrogen. The middle ring is oxygen-enriched combustion, the outer ring is diffusion combustion, the combustion deviates from the stoichiometric ratio, the combustion temperature is low, and the method is an important means for reducing nitrogen. The swirling air from the inner ring tertiary air duct supplements the residual combustion-supporting air for the main combustion area, and because the center of the whole flow field is not provided with fuel gas, the thickness of the flame layer of the main combustion area is thin and is in a bell shape, the temperature of the flame in the shape of a fire is low, and the generation of nitrogen oxides can be greatly reduced. Due to the blocking of the flame stabilizing disc, a negative pressure backflow area is formed at the far end of the center of the flow field, and smoke forms backflow in the area to form reducing atmosphere, so that the method is an important means for reducing nitrogen. Through the above means, the effect of nitrogen reduction is achieved.
It should be noted that, in this embodiment, the cyclone 7 is used to provide combustion-supporting air for the fuel gas ejected from the primary air distribution holes 8-1 of the outer nozzle 5, and this part of the combustion-supporting air can prevent flame from being present in the center of the flame, so that the burner head burns to form a "thin-walled" bell-shaped "flame, and the temperature of this fire is low, thereby achieving the nitrogen reduction effect. The effect of the swirl pot 7 on the combustion air by means of the vanes also involves the problem of "surging" by preventing this part of the combustion air from blowing straight.
It should be noted that, compared with the conventional burner with a central nozzle, the burner of this embodiment has a tertiary air duct in the center but no central nozzle, so that the inner ring has no combustion gas, the flame layer has a small thickness and a low temperature, and the emission of nitrogen oxides can be further reduced.
In conclusion, the invention provides a double-rotation thin-wall fire-shaped combustion head for a low-nitrogen combustor, and by adopting the technical scheme, the invention achieves the following technical effects:
1. the smoke gas internal circulation technology (FIR) and the central flame stabilizing technology are comprehensively utilized, so that the combustion intensity and the combustion stability are ensured while the nitrogen is reduced;
2. the flame size and shape can be adjusted by adjusting the length of the combustion air duct, so that the flame burner is suitable for different boiler requirements.
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 the same; 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A double-rotary thin-wall fire-shaped combustion head for a low-nitrogen burner comprises an air duct, a gas pipe and a nozzle which are arranged in an air supply channel in the air duct, and is characterized in that,
a flame stabilizing disc positioned at the tail end of the air supply channel is arranged in the air duct, the nozzle comprises a plurality of outer nozzles which are uniformly distributed on the edge of the flame stabilizing disc in the circumferential direction, and the gas pipe comprises a gas main pipe and a plurality of gas branch pipes which are used for connecting the gas main pipe and the outer nozzles;
a gap is formed between the flame stabilizing disc and the air duct to form a primary air duct, a through hole is formed in the flame stabilizing disc to form a secondary air duct, a round hole is formed in the center of the flame stabilizing disc, a rotational flow drum is arranged in the round hole to form a tertiary air duct, and the air supply quantity of the primary air duct is larger than the secondary air duct and larger than the tertiary air duct;
the outer nozzle is provided with a primary air distribution hole facing the primary air duct and a secondary air distribution hole facing the secondary air duct, the aperture of the primary air distribution hole is larger than that of the secondary air distribution hole, the volume of all fuel gas sprayed by the nozzle is 80-90% of that of the fuel gas sprayed by the primary air distribution hole, and the volume of all fuel gas sprayed by the secondary air distribution hole is 10-20%;
a plurality of spiral-flow sheets are radially and circumferentially distributed on the flame stabilizing disc, an included angle is formed between each spiral-flow sheet and the disc surface of the flame stabilizing disc to form a spiral-flow channel, and the spiral-flow channel also comprises a long and narrow through hole which is formed in the disc surface of the flame stabilizing disc and corresponds to the spiral-flow sheets; the secondary air duct is formed by the plurality of rotational flow channels and a plurality of through holes arranged on the disc surface of the flame stabilizing disc;
a rotational flow flame isolation area is formed between every two rotational flow sheets, the outer nozzles are positioned at the outer edge of the rotational flow flame isolation area, and the rotational flow flame isolation area is used for relatively isolating gas injected inwards from the secondary gas distribution holes in each outer nozzle;
the flame formed by the combustion at the tail end of the combustion head sequentially comprises a flame stabilizing area, a main combustion area and a backflow area from a nozzle to the outside, wherein the main combustion area is formed by mixing and combusting gas supplied by a primary air distribution hole and combustion-supporting air from a primary air channel and is diffusion combustion; the fuel gas supplied by the secondary air distribution hole and the combustion-supporting air from the secondary air duct are mixed with the transition plate and rotate to burn to form the stable flame area, and the stable flame area is oxygen-enriched combustion; the tertiary air duct supplies combustion-supporting air for the flame in the main combustion area of the outer ring, so that the flame in the main combustion area is in a thin-wall bell shape; a negative pressure backflow area is formed at the far end of the center of the flame flow field; the combustion-supporting air comprises air and flue gas generated by combustion of the burner.
2. The dual-swirl thin-walled burner head for a low-nitrogen burner of claim 1,
the adjustable air outlet moves back and forth relative to the air cylinder, so that the length of the air supply channel is adjustable.
3. The dual-swirl thin-walled burner head for a low-nitrogen burner of claim 2,
and a pull rod which is connected with the adjustable air outlet and is used for adjusting the adjustable air outlet is also arranged in the air duct.
4. The dual-swirl thin-walled burner head for a low-nitrogen burner of claim 2,
the outlet of the adjustable air outlet is a straight opening or a contracted opening.
5. The dual-swirl thin-walled burner head for a low-nitrogen burner of claim 1,
the cyclone cylinder comprises an inner cylinder, an outer cylinder and a plurality of rotary vanes connected between the inner cylinder and the outer cylinder, an air channel is formed between the rotary vanes, openings are not formed in the two ends of the inner cylinder in a plugging mode, and the rotary vanes and the axis of the cyclone cylinder form a certain included angle which is smaller than 45 degrees.
6. The dual-swirl thin-walled burner head for a low-nitrogen burner of claim 1,
the number of the gas branch pipes is 4-12;
each outer nozzle is provided with 1-3 large holes serving as primary air distribution holes towards the direction of a primary air duct, and the aperture of each primary air distribution hole is 10-25 mm;
and 1-3 small holes serving as secondary air distribution holes are respectively formed in the plurality of outer nozzles which are mutually spaced towards the direction of the cyclone cylinder, and the aperture of each secondary air distribution hole is 3-10 mm.
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| CN111780112B (en) * | 2020-07-14 | 2022-06-21 | 江苏迈阳环保有限公司 | Injection mechanism for low-nitrogen combustor |
| CN112128739A (en) * | 2020-09-11 | 2020-12-25 | 富士特锅炉(天津)有限公司 | Tangential rotational flow diffusion coupling flue gas external circulation low-nitrogen combustion equipment |
| CN112628732B (en) * | 2020-12-24 | 2022-06-07 | 西安交通大学 | Nozzle adjustable low NO suitable for middle-low heat value gasxBurner with a burner head |
| CN112963833B (en) * | 2021-02-24 | 2022-04-05 | 西安交通大学 | Multistage cyclone burner of low nitrogen of ammonia |
| CN113048478A (en) * | 2021-04-01 | 2021-06-29 | 西安交大思源科技股份有限公司 | Low-calorific-value combustible gas cyclone low-nitrogen burner |
| CN113339794B (en) * | 2021-05-19 | 2023-06-27 | 清华大学山西清洁能源研究院 | Low nitrogen burner |
| CN114165783B (en) * | 2021-12-14 | 2022-07-19 | 军事科学院系统工程研究院军需工程技术研究所 | Pressure atomization constant-power diesel burner suitable for complex environment and control method |
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| GB2297151B (en) * | 1995-01-13 | 1998-04-22 | Europ Gas Turbines Ltd | Fuel injector arrangement for gas-or liquid-fuelled turbine |
| CN201885230U (en) * | 2010-12-10 | 2011-06-29 | 上海诺特飞博燃烧设备有限公司 | Flue gas internal reflux homogeneous-combustion low-NOx (nitric oxide) combustor |
| CN202361383U (en) * | 2011-12-06 | 2012-08-01 | 南京博纳能源环保科技有限公司 | Incinerator for sulfur-containing waste water acid-making system |
| CN105135432B (en) * | 2015-09-21 | 2017-07-11 | 上海华之邦科技股份有限公司 | A kind of ultralow NOXGas burner |
| CN105351925B (en) * | 2015-11-09 | 2018-04-10 | 上海华之邦科技股份有限公司 | Low emission fuel gas buring stove and its combustion air collocation method |
| CN108151019B (en) * | 2018-01-26 | 2023-08-11 | 北京水木星源环保科技有限公司 | Burner |
| CN110186044B (en) * | 2019-06-26 | 2020-08-04 | 北京泷涛环境科技有限公司 | Gas-air partial premixing burner |
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