CN210463001U - Combustor with low emission of nitrogen oxides - Google Patents
Combustor with low emission of nitrogen oxides Download PDFInfo
- Publication number
- CN210463001U CN210463001U CN201920991787.0U CN201920991787U CN210463001U CN 210463001 U CN210463001 U CN 210463001U CN 201920991787 U CN201920991787 U CN 201920991787U CN 210463001 U CN210463001 U CN 210463001U
- Authority
- CN
- China
- Prior art keywords
- channel
- flue gas
- circulating flue
- combustion
- fuel
- 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
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- 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
- F23D14/48—Nozzles
-
- 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
-
- 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
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A combustor with low nitrogen oxide emission comprises a central fuel channel, a first combustion-supporting air channel is arranged around the outer circumference of the central fuel channel, a first circulating flue gas channel is arranged around the outer circumference of the first combustion-supporting air channel, and a first circulating flue gas channel is arranged around the first circulating flue gas channelA second combustion-supporting air channel is arranged in the outer circumferential direction, a second circulating flue gas channel is arranged around the outer circumferential direction of the second combustion-supporting air channel, and a third circulating flue gas channel is arranged around the outer circumferential direction of the second circulating flue gas channel; on one hand, the circulating flue gas is actively mixed with the fuel, on the other hand, the circulating flue gas is actively mixed with the combustion-supporting air, and the concentration of the fuel and the concentration of oxygen in the combustion-supporting air are diluted so as to inhibit the combustion speed and the concentrated heat release of the fuel in the boiler, thereby reducing the combustion temperature and the NOxThe amount of production.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection burning, especially, relate to a low nitrogen oxide discharges
The burner of (1).
Background
In recent years, the emission of nitrogen oxides in energy-related departments in China rapidly rises, the emission of the nitrogen oxides in the whole nation in 2000 is 12.1X106t, and the emission of the nitrogen oxides is increased to 19.1X106t in 2005, and the emission of the nitrogen oxides increases by 10% every year. If no further emission reduction measures are taken, with the development of national economy, population growth and the acceleration of urbanization process, the emission of nitrogen oxides in China will continue to increase in the future, and according to the current development trend, the emission reaches 35.4X106t by 2030, so that serious environmental influence is caused, and therefore, the emission control of the nitrogen oxides must be strengthened practically.
Natural gas is a well-known clean fuel, but NO is produced by the combustion of natural gasxLarge discharge amount of NOxIs the most significant pollutant of natural gas boilers. At present, the environmental protection department in China has higher and higher requirements on the emission of pollutants generated by pulverized coal combustion. Therefore, reducing the discharge of nitrogen oxides is one of the main targets of the current pulverized coal boiler combustion system design.
The NOx emission of the gas-fired boiler without any low-nitrogen measure is as high as 600-800 mg/Nm3The existing low-nitrogen gas burner can realize NOx<200mg/Nm3. By adopting the measure of smoke gas recirculation outside the boiler, the prior gas-fired boiler can generally realize NOxDischarging<80 mg. But there is still room for further reduction of this value,
in order to reduce the discharge amount of nitrogen oxides, on one hand, in the design of a boiler, the temperature in a hearth is reduced as much as possible, and a possibly generated high-temperature area, particularly a local high-temperature area generated due to flow field changes and the like, is reduced. To have a relatively uniform combustion area to ensure combustion of the fuel and to reduce the maximum temperature of the flameAnd (4) degree. On the other hand, fuel type NOXFuel type NO decreased with decrease in excess air ratioXIf oxygen is deficient in the combustion center of the main combustion zone, the majority of the volatile nitrogen and part of the coke N can be converted into N2Thereby reducing NO in the smokeX。
The combustion system in the prior art has the following defects:
currently, a flue gas recirculation method commonly used in a boiler combustion system mostly adopts an external or internal fan to pump low-temperature circulating flue gas into flame of a combustion chamber to participate in combustion, but due to the design problem of a combustor, the recirculated flue gas and combustion air airflow are not uniformly mixed, the temperature in a hearth cannot be effectively reduced, and the retention time of the flue gas in the hearth is short.
SUMMERY OF THE UTILITY MODEL
The utility model discloses at the inside overall arrangement design to fuel passageway, circulation cigarette passageway and combustion-supporting wind passageway of combustor, on the one hand, combustion-supporting wind passageway circulation flue gas surrounds, and the circulation flue gas mixes with combustion-supporting wind for reduce combustion-supporting wind's oxygen content, reduce the excess air coefficient, make fuel burn in α < 1 reducing atmosphere, NO in the ability greatly reduced flue gasX. On the other hand，The fuel channel is surrounded by circulating flue gas, which mixes with fuel and is used to reduce ignition temperature, and thermal NO is generated along with temperature reductionxThe amount of production of (B) is also reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a burner with low nitrogen oxide emission comprises a central fuel channel, wherein a first combustion-supporting air channel is arranged around the outer circumference direction of the central fuel channel, a first circulating flue gas channel is arranged around the outer circumference direction of the first combustion-supporting air channel, a second combustion-supporting air channel is arranged around the outer circumference direction of the first circulating flue gas channel, a second circulating flue gas channel is arranged around the outer circumference direction of the second combustion-supporting air channel, and a third circulating flue gas channel is arranged around the outer circumference direction of the second circulating flue gas channel;
a first series of fuel spray guns are arranged in the first circulating flue gas channel, and a second series of fuel spray guns are arranged in the third circulating flue gas channel.
Furthermore, outlets of the central fuel channel, the first combustion-supporting air channel, the first circulating flue gas channel, the second combustion-supporting air channel, the second circulating flue gas channel, the third circulating flue gas channel, the first series of fuel spray guns and the second series of fuel spray guns are on the same plane.
Furthermore, the central fuel channel is a metal pipe, the inlet of the central fuel channel is provided with the regulating valve, and the fuel at the outlet of the central fuel channel can be used as a pilot burner to be burnt all the time, so that the flame of the hearth is not extinguished.
Furthermore, the cross section of the first combustion-supporting air channel is a circular ring taking the central fuel channel as the circle center, the inlet of the first combustion-supporting air channel is connected with a combustion-supporting air source, and the outlet of the first combustion-supporting air channel is provided with a mixed wind wheel.
The cross section of the first circulating flue gas channel is a circular ring taking the central fuel channel as the center of a circle, a first series of fuel spray guns are arranged in the first circulating flue gas channel at equal intervals along the direction of the circular ring, and the inlet of the first circulating flue gas channel is connected with circulating flue gas.
Furthermore, the cross section of the second combustion-supporting air channel is a circular ring taking the central fuel channel as the circle center, the inlet of the second combustion-supporting air channel is connected with a combustion-supporting air source, and the outlet of the second combustion-supporting air channel is provided with a mixed wind wheel.
Furthermore, the cross section of the second circulating flue gas channel is a circular ring taking the central fuel channel as the center of a circle, and the inlet of the second circulating flue gas channel is connected with circulating flue gas.
Furthermore, the cross section of the third circulating flue gas channel is a circular ring taking the central fuel channel as the center of a circle, a second series of fuel spray guns are arranged in the third circulating flue gas channel at equal intervals along the direction of the circular ring, and the inlet of the third circulating flue gas channel is connected with circulating flue gas.
Preferably, the first series of fuel lances are comprised of circular tubes of equal cross-sectional size, with each lance inlet connected to a source of fuel.
Preferably, the second series of fuel lances are comprised of circular tubes of equal cross-sectional size, with each lance inlet connected to a source of fuel.
The utility model has the advantages as follows:
the flow guide channels of the circulating flue gas are designed in the combustor, on one hand, the circulating flue gas is actively mixed with fuel, on the other hand, the circulating flue gas is actively mixed with combustion-supporting air, and the fuel concentration and the oxygen-containing concentration of the combustion-supporting air are diluted so as to inhibit the combustion speed and the concentrated heat release of the fuel in the boiler, thereby reducing the combustion temperature and the generation amount of NOx.
The circulating flue gas is an independent channel, the combustion-supporting air channel is not influenced, the resistance of the combustor is small, and the energy consumption of the needed combustion-supporting air supplied to the fan is small.
Drawings
FIG. 1 is a schematic cross-sectional view of a low NOx emission combustor;
in the figure, the position of the upper end of the main shaft,
1.the fuel injection device comprises a central fuel channel, 2, a first combustion-supporting air channel, 3, a first circulating flue gas channel, 4, a second combustion-supporting air channel, 5, a second circulating flue gas channel, 6, a third circulating flue gas channel, 7, a first series of fuel spray guns and 8, a second series of fuel spray guns.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Example 1
Referring to fig. 1, a burner with low nitrogen oxide emission includes a central fuel channel 1, a first combustion air channel 2 is arranged around the outer circumference of the central fuel channel, the first combustion air channel 2 is a circular ring with the central fuel channel as the center of circle, the inlet is connected with a combustion air source, and the outlet is provided with a mixing wind wheel; a first circulating flue gas channel 3 is arranged around the outer circumference of the first combustion-supporting air channel 2, the cross section of the first circulating flue gas channel 3 is a circular ring taking the central fuel channel as the center of a circle, a first series of fuel spray guns 7 are arranged in the first circulating flue gas channel 3 at equal intervals along the direction of the circular ring, and the inlet of the first circulating flue gas channel 3 is connected with circulating flue gas. A second combustion-supporting air channel 4 is arranged around the outer circumference direction of the first circulating flue gas 3 channel, the cross section of the second combustion-supporting air channel 4 is a circular ring taking the central fuel channel as the circle center, the inlet of the second combustion-supporting air channel 4 is connected with a combustion-supporting air source, and the outlet is provided with a mixed wind wheel. A second circulating flue gas channel 5 is arranged around the outer circumference of the second combustion-supporting air channel 4, the cross section of the second circulating flue gas channel 5 is a circular ring taking the central fuel channel as the center of a circle, and the inlet of the second circulating flue gas channel 5 is connected with circulating flue gas. A third circulating flue gas channel 6 is arranged around the outer circumference of the second circulating flue gas channel 5, and the cross section of the third circulating flue gas channel 6 is a circular ring taking the central fuel channel as the center of a circle; a second series of fuel spray guns 8 are arranged in the third circulating flue gas channel.
The outlets of the central fuel channel 1, the first combustion-supporting air channel 2, the first circulating flue gas channel 3, the second combustion-supporting air channel 4, the second circulating flue gas channel 5, the third circulating flue gas channel 6, the first series of fuel spray guns 7 and the second series of fuel spray guns 8 are on the same plane.
The central fuel channel 1 is a metal tube with the diameter of 20cm, an electric regulating valve is arranged at the inlet of the central fuel channel, and fuel at the outlet of the central fuel channel can be used as a pilot burner to burn all the time, so that the flame of a hearth is not extinguished.
The first series of fuel spray guns 7 are composed of 4-10 circular pipes with equal cross sections, the diameter of each spray gun is 0.5-5.0 cm, and the inlet of each spray gun is connected with a fuel source.
The second series of fuel spray guns 8 consist of 8-20 circular pipes with equal cross sections, the diameter of each spray gun is 1.0-3.0 cm, and the inlet of each spray gun is connected with a fuel source.
The method of using the low nox emission burner is further illustrated by the following examples.
Example 2
A burner with low nitrogen oxide emission is provided, combustion-supporting air is introduced to ignite an outlet of a central fuel channel 1 and outlets of a first series of fuel spray guns and a second series of fuel spray guns, and fuel at the outlet of the burner can be used as a pilot burner to be burnt all the time by adjusting an electric adjusting valve of the central fuel channel, so that the flame of a hearth is not extinguished. The circulating fan absorbs flue gas in the hearth, the flow of the circulating flue gas is adjusted by adjusting an electric adjusting valve on a circulating main flue pipe, a first combustion-supporting air channel is surrounded by a first circulating flue gas channel, a second combustion-supporting air channel is surrounded by a second circulating flue gas channel, so that the circulating flue gas and the combustion-supporting air are fully mixed, and the oxygen content of the combustion-supporting air is reduced. The first series of fuel spray guns are arranged in the first circulating flue, and the second series of fuel spray guns are arranged in the third circulating flue, so that circulating flue gas and fuel are fully mixed, the combustion speed of the fuel is reduced, and the temperature is reduced.
By applying the technology, the energy consumption can be saved, and NO can be reducedxDischarging, and realizing NO under the working condition that the temperature of hot air is less than or equal to 250 DEG CX<30mg/Nm3. Calculated by a 25T boiler, the smoke discharge per hour is about 22000Nm3The existing burner technology can only realize NO under the working condition that the hot air temperature is less than or equal to 250 DEG CxDischarging<80mg Nm3(ii) a After using ultra-low nitrogen burner, NOxDischarging<30mgNm3； NOxThe emission reduction is about 1.1Kg/h, and NO of a single 25T boiler is reduced every yearxThe emission is reduced by nearly 10 tons.
Claims (10)
1. A burner with low nitrogen oxide emission is characterized by comprising a central fuel channel, wherein a first combustion-supporting air channel is arranged around the outer circumference of the central fuel channel, a first circulating flue gas channel is arranged around the outer circumference of the first combustion-supporting air channel, a second combustion-supporting air channel is arranged around the outer circumference of the first circulating flue gas channel, a second circulating flue gas channel is arranged around the outer circumference of the second combustion-supporting air channel, and a third circulating flue gas channel is arranged around the outer circumference of the second circulating flue gas channel;
a first series of fuel spray guns are arranged in the first circulating flue gas channel, and a second series of fuel spray guns are arranged in the third circulating flue gas channel.
2. The burner with low nitrogen oxide emission according to claim 1, wherein outlets of the central fuel channel, the first combustion air channel, the first circulating flue gas channel, the second combustion air channel, the second circulating flue gas channel, the third circulating flue gas channel, the first series of fuel spray guns and the second series of fuel spray guns are on the same plane.
3. The burner with low emission of nitrogen oxides as claimed in claim 1, wherein said central fuel channel is a metal tube, and a regulating valve is installed at the inlet of the central fuel channel, and the outlet fuel of the central fuel channel can be always burnt as a pilot burner to ensure that the flame of the furnace chamber is not extinguished.
4. The burner with low nitrogen oxide emission according to claim 1, wherein the cross section of the first combustion-supporting air channel is a circular ring with the center fuel channel as a circle center, an inlet of the first combustion-supporting air channel is connected with a combustion-supporting air source, and an outlet of the first combustion-supporting air channel is provided with a mixing wind wheel.
5. The burner with low nitrogen oxide emission according to claim 1, wherein the cross section of the first circulating flue gas channel is a circular ring taking the central fuel channel as a center, a first series of fuel spray guns are arranged in the first circulating flue gas channel at equal intervals along the direction of the circular ring, and an inlet of the first circulating flue gas channel is connected with the circulating flue gas.
6. The burner with low nitrogen oxide emission according to claim 1, wherein the cross section of the second combustion-supporting air channel is a circular ring with the center fuel channel as the center of a circle, the inlet of the second combustion-supporting air channel is connected with a combustion-supporting air source, and the outlet is provided with a mixing wind wheel.
7. The burner with low nitrogen oxide emission according to claim 1, wherein the cross section of the second circulating flue gas channel is a circular ring with the center of the central fuel channel as a center, and the inlet of the second circulating flue gas channel is connected with the circulating flue gas.
8. The burner with low nitrogen oxide emission according to claim 1, wherein the cross section of the third circulating flue gas channel is a circular ring taking the central fuel channel as a center, a second series of fuel spray guns are arranged in the third circulating flue gas channel at equal intervals along the direction of the circular ring, and an inlet of the third circulating flue gas channel is connected with the circulating flue gas.
9. The burner of claim 1, wherein the first plurality of fuel lances are comprised of circular tubes of equal cross-sectional size, each lance inlet being connected to a source of fuel.
10. The burner of claim 1, wherein the second plurality of fuel lances are comprised of circular tubes of equal cross-sectional size, each lance inlet being connected to a source of fuel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991787.0U CN210463001U (en) | 2019-06-28 | 2019-06-28 | Combustor with low emission of nitrogen oxides |
| PCT/CN2020/098077 WO2020259577A1 (en) | 2019-06-28 | 2020-06-24 | Combustor with low nitrogen oxide emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991787.0U CN210463001U (en) | 2019-06-28 | 2019-06-28 | Combustor with low emission of nitrogen oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210463001U true CN210463001U (en) | 2020-05-05 |
Family
ID=70442635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920991787.0U Active CN210463001U (en) | 2019-06-28 | 2019-06-28 | Combustor with low emission of nitrogen oxides |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN210463001U (en) |
| WO (1) | WO2020259577A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375300A (en) * | 2019-06-28 | 2019-10-25 | 浙江先创能源科技股份有限公司 | A kind of burner of low-nitrogen oxide discharging |
| WO2020259577A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江先创能源科技股份有限公司 | Combustor with low nitrogen oxide emission |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3209811A (en) * | 1963-03-28 | 1965-10-05 | Loftus Engineering Corp | Combination high velocity burner |
| US3724995A (en) * | 1971-11-24 | 1973-04-03 | American Air Filter Co | Burner assembly |
| DE4006805A1 (en) * | 1990-03-05 | 1991-09-12 | Kloeckner Waermetechnik | BURNER WITH EXHAUST GAS RECIRCULATION, IN PARTICULAR BLOWER BURNER |
| CN102721058B (en) * | 2012-06-26 | 2015-02-25 | 上海华之邦科技股份有限公司 | Gas burner with low NOX |
| CN204063038U (en) * | 2014-07-07 | 2014-12-31 | 洛阳瑞昌石油化工设备有限公司 | Low NO xflue gas is from return flow burner |
| CN104654306B (en) * | 2015-02-12 | 2017-12-05 | 海湾环境科技（北京）股份有限公司 | A kind of low nitrogen oxide burner |
| CN106642114B (en) * | 2016-11-15 | 2018-10-23 | 西安西热锅炉环保工程有限公司 | It is a kind of with pipette tips from the ultra-low nitrogen volumetric combustion device of smooth combustion apparatus |
| CN107062226B (en) * | 2017-05-23 | 2023-10-17 | 北京市热力集团有限责任公司 | High-temperature flue gas large-backflow low-nitrogen combustor |
| CN208253580U (en) * | 2018-05-31 | 2018-12-18 | 西安西热锅炉环保工程有限公司 | A kind of low nitrogen burner |
| CN210463001U (en) * | 2019-06-28 | 2020-05-05 | 浙江先创能源科技股份有限公司 | Combustor with low emission of nitrogen oxides |
| CN110375300A (en) * | 2019-06-28 | 2019-10-25 | 浙江先创能源科技股份有限公司 | A kind of burner of low-nitrogen oxide discharging |
-
2019
- 2019-06-28 CN CN201920991787.0U patent/CN210463001U/en active Active
-
2020
- 2020-06-24 WO PCT/CN2020/098077 patent/WO2020259577A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375300A (en) * | 2019-06-28 | 2019-10-25 | 浙江先创能源科技股份有限公司 | A kind of burner of low-nitrogen oxide discharging |
| WO2020259577A1 (en) * | 2019-06-28 | 2020-12-30 | 浙江先创能源科技股份有限公司 | Combustor with low nitrogen oxide emission |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020259577A1 (en) | 2020-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277795B (en) | Gas burner capable of adjusting gas to be self-recycling | |
| WO2015103831A1 (en) | Fuel/gas-saving ignition and stable-combustion low-nitrogen swirling pulverized coal combustor | |
| CN110107898B (en) | Coke oven gas low-nitrogen burner | |
| CN204678328U (en) | combustion powder industrial boiler | |
| CN106122945A (en) | A kind of low-NOx coal powder system and method | |
| CN210463001U (en) | Combustor with low emission of nitrogen oxides | |
| WO2021169326A1 (en) | Low-nitrogen gas burner suitable for medium-and-low heat value fuels | |
| CN105114951A (en) | Tail edge backflow dual-classification low-nitrogen-oxygen gas burner | |
| CN111780106B (en) | Flameless burner of steel rolling heating furnace and application thereof | |
| CN206739256U (en) | A kind of single backhaul WNS structure boilers | |
| CN204042867U (en) | A kind of low-NO_x burner system | |
| CN107461742B (en) | Graded flameless low-nitrogen combustion head | |
| CN105605560A (en) | Micro-emission pulverized coal combustion system | |
| CN112902154A (en) | Over-fire air system with controllable steam temperature deviation and CO concentration at two sides of opposed firing boiler | |
| CN110375300A (en) | A kind of burner of low-nitrogen oxide discharging | |
| CN205579544U (en) | Discharge pulverized coal combustion system a little | |
| CN201964411U (en) | High-power double-cyclone burning semi-premix gas burner | |
| CN205746815U (en) | Low-NOx coal powder system | |
| CN109058992B (en) | Microchannel distribution ultra-low nitrogen combustor | |
| CN112555865A (en) | Carbon black tail gas boiler and carbon black tail gas treatment method | |
| CN108895446B (en) | Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner | |
| CN206112909U (en) | Metal surface combustion system | |
| CN206176368U (en) | Pure oxygen combustor | |
| CN220582452U (en) | High-efficient low nitrogen carbon black tail gas burner | |
| CN216079794U (en) | Novel low-nitrogen combustor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |