CN113864774A - Low-NOx low-CO high-efficiency energy-saving combustor - Google Patents
Low-NOx low-CO high-efficiency energy-saving combustor Download PDFInfo
- Publication number
- CN113864774A CN113864774A CN202111148894.5A CN202111148894A CN113864774A CN 113864774 A CN113864774 A CN 113864774A CN 202111148894 A CN202111148894 A CN 202111148894A CN 113864774 A CN113864774 A CN 113864774A
- Authority
- CN
- China
- Prior art keywords
- combustor
- combustion chamber
- low
- burner
- secondary nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 77
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011449 brick Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a low-NOx low-CO high-efficiency energy-saving burner, which comprises a burner shell, wherein the top end of the burner shell is provided with a combustion chamber body, the inner cavity of the combustion chamber body is a combustion chamber, the top end of the combustion chamber body is internally provided with a burner closing-in, the outside of the top end of the combustion chamber is provided with a secondary nozzle with a flow guide pipe, fuel gas sprayed by a main gun is mixed with air entering the combustion chamber at high speed, so that low-temperature oxygen-enriched main flame is formed inside the combustion chamber, the generation of NOx and CO is reduced, the fuel gas sprayed by each burner secondary gun can wind the flue gas into the secondary nozzle with the flow guide pipe from the position of a flue gas backflow channel and then is sprayed into the main flame through the secondary nozzle with the flow guide pipe for combustion, and because of containing a large amount of flue gas, the combustion intensity is reduced, namely the generation of NOx is reduced, the leakage of the fuel gas into the flue gas of the combustion chamber is reduced, and also reduces the formation of CO.
Description
Technical Field
The invention relates to the technical field of energy-saving burners, in particular to a low-NOx and low-CO efficient energy-saving burner.
Background
The low NOx combustion burner generally adopts the low NOx technology of air classification and fuel classification, the burner generally has the problems of low combustion efficiency, high CO content and the like, and particularly, when the furnace temperature is lower than 600 ℃, the CO content discharged in flue gas reaches hundreds or thousands of PPM. Exceeding several times or hundreds times of environmental protection requirements, not only wastes energy, but also destroys the environment, and simultaneously brings personal safety of operators.
The main reason is that most of the fuel sprayed by the sublance is sprayed into the main flame for combustion after being mixed with the flue gas, the other part of the fuel is dispersed in the combustion chamber, the fuel is primarily combusted and decomposed into CO which flows with the flue gas, if the temperature of the combustion chamber reaches above 600 ℃, the CO can be combusted in the combustion chamber, and if the temperature of the combustion chamber is lower than 600 ℃, the CO is discharged with the flue gas.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model discloses a low-NOx and low-CO efficient energy-saving burner, which solves the problem that the CO in the flue gas discharged by the low-NOx burner is high, and simultaneously, the heat efficiency and the heat intensity of the burner are improved, so that a heating furnace is more efficient, more energy-saving and more environment-friendly.
In order to realize the purpose, the invention adopts the following technical scheme:
a low-NOx and low-CO efficient energy-saving burner comprises a burner shell, wherein the top end of the burner shell is provided with a combustion chamber body, a cavity inside the combustion chamber body is a combustion chamber, the top end of the combustion chamber body is internally provided with a burner closing-in, the top end of the combustion chamber body is externally provided with a secondary nozzle with a flow guide pipe, a flue gas reflux channel is arranged between the bottom end of the secondary nozzle with the flow guide pipe and the bottom end of the combustion chamber body, the bottom end of the burner shell is provided with a burner main gun and a pilot burner, the burner main gun and the pilot burner both penetrate through the burner shell and extend into the combustion chamber, a burner sublance is arranged at the bottom end of the burner shell corresponding to the position below the secondary nozzle with the flow guide pipe, the combustor sublance runs through the combustor shell and penetrates through the wall body at the lower end of the combustion chamber body, and the combustor sublance is arranged corresponding to the smoke backflow channel.
Furthermore, an air inlet is installed on the side surface of the burner shell, and an air adjusting door is installed inside the air inlet.
Furthermore, the combustion chamber body is formed by laying refractory bricks.
Further, the diameter of the cavity inside the combustor shell is larger than that of the combustion chamber, and the diameter of the combustion chamber is gradually reduced from bottom to top.
Further, the combustor binding off is formed by the inside wall of combustion chamber body to the central shrink, and the combustion chamber passes through combustor binding off and external intercommunication.
Further, take honeycomb duct secondary nozzle to include secondary nozzle and honeycomb duct, the honeycomb duct setting is on the surface of combustion chamber body upper end, and secondary nozzle connects in honeycomb duct up end department, and secondary nozzle's up end is higher than the up end of combustion chamber body.
Further, the flow guide pipe is connected to the outer surface of the lower end of the secondary nozzle, and the inner surface of the lower end of the secondary nozzle is connected to the outer surface of the combustion chamber body.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the fuel gas sprayed by the main gun of the combustor is mixed with the air entering the combustion chamber at a high speed, and due to the arrangement of the cavity structure in the combustion chamber, the downward air flow speed is faster, so that a low-temperature oxygen-enriched main flame is formed in the combustion chamber, and the generation of NOx and CO is reduced.
2. The fuel gas sprayed by each burner sublance can be used for winding the flue gas into the secondary nozzle with the flow guide pipe from the position of the flue gas backflow channel and then sprayed into the main flame for combustion through the secondary nozzle with the flow guide pipe.
3. The main flame adopts high-speed flue gas speed, make more flue gas mist that inhales the spun fuel gas of sublance more sooner and carry the mist enter main flame burning, this kind of flame is straight strong, flue gas speed is high, be drawn into more flue gases simultaneously, flame temperature has been reduced, NOx has been reduced promptly and this combustion chamber flue gas backward flow aggravation has been made again, the flue gas heats the average hot strength that improves the combustion chamber repeatedly, the temperature of high-temperature region has been reduced, improve the temperature of low-temperature region, improve the heating power of combustion chamber, make the combustion chamber operation elasticity great amount safer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
1. a burner main gun; 2. a burner sublance; 3. a secondary nozzle with a flow guide pipe; 4. a combustion chamber body; 5. closing the burner; 6. a burner housing; 7. a beacon light; 8. an air damper; 9. a combustion chamber; 10. a flue gas return channel.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
With reference to the attached drawing 1, a low-NOx low-CO efficient energy-saving burner comprises a burner shell 6, a burner body 4 is installed at the top end of the burner shell 6, a combustion chamber 9 is arranged in the cavity inside the burner body 4, a burner closing-in 5 is arranged inside the top end of the burner body 4, a secondary nozzle 3 with a flow guide pipe is arranged outside the top end of the burner body 4, a flue gas backflow passage 10 is arranged between the bottom end of the secondary nozzle 3 with the flow guide pipe and the bottom end of the burner body 4, flue gas after combustion enters the secondary nozzle 3 with the flow guide pipe through the flue gas backflow passage 10, a burner main gun 1 and a pilot burner 7 are installed at the bottom end of the burner shell 6, the burner main gun 1 and the pilot burner 7 both penetrate the burner shell 6 and extend to the inside of the combustion chamber 9, and combustible gas sprayed by the burner main gun 1 is combusted through the pilot burner 7, combustor sublance 2 is installed to the position department that the bottom of combustor casing 6 is corresponding to 3 below honeycomb duct secondary nozzle, combustor sublance 2 runs through combustor casing 6 and passes the wall body of 4 lower extremes of combustion chamber body to combustor sublance 2 sets up corresponding to flue gas return channel 10, and 2 spun gas of combustor sublance can mix with the flue gas that gets into through flue gas return channel 10, then enters into the inside of taking honeycomb duct secondary nozzle 3 simultaneously, contacts through the main flame that produces when taking 3 blowout backs of honeycomb duct secondary nozzle and the burning of combustor main gun 1, carries out the burning operation once more from this.
An air inlet is arranged on the side surface of the burner shell 6, and a regulating damper 8 is arranged inside the air inlet, so that the air inflow of air can be controlled according to the use requirement.
The combustion chamber body 4 is formed by laying refractory bricks, so that the whole combustion chamber has good fire resistance.
The diameter of the cavity inside the combustor shell is larger than that of the combustion chamber, and the diameter of the combustion chamber is gradually reduced from bottom to top.
The combustor binding off is formed to the central shrink by the inside wall of combustion chamber body, and the combustion chamber passes through combustor binding off and external intercommunication, in this application, the external furnace that indicates is the radiant chamber of heating furnace promptly.
The secondary nozzle with the flow guide pipe comprises a secondary nozzle and a flow guide pipe, the flow guide pipe is arranged on the outer surface of the upper end of the combustion chamber body, the secondary nozzle is connected to the upper end opening of the flow guide pipe, and the upper end face of the secondary nozzle is higher than the upper end face of the combustion chamber body; preferably, the flow guide pipe is connected to an outer surface of a lower end of the secondary nozzle, and an inner surface of the lower end of the secondary nozzle is connected to an outer surface of the combustion chamber body.
In the invention, the flow guide pipe is in a hollow conical structure with an opening at the upper end and the lower end, the outer side surface of the upper end of the combustion chamber body is also in a conical surface, the flow guide pipe is covered at the upper end of the combustion chamber body, and a channel formed between the flow guide pipe and the combustion chamber body is a flue gas backflow channel 10; the guide pipe is connected with the combustion chamber body through the secondary nozzle, the upper port of the guide pipe is sleeved on the outer side surface of the lower end of the nozzle, and the inner side surface of the lower end of the nozzle is sleeved on the upper end part of the combustion chamber body; preferably, the secondary nozzle is conical.
In the invention, a plurality of burner sublance 2 are arranged at intervals around the circumference of the wall body at the lower end of the combustion chamber body.
Example 1, a low NOx low CO high efficiency energy saving burner, when in use, the burner main gun 1 gas was ignited by the pilot burner 7, the main flame is formed by pre-burning in the combustion chamber 9 and is ejected to the hearth at high speed through the burner closing-in 5, the flue gas generated by the main flame flows back from the position of the flue gas return passage 10, then the fuel gas sprayed out of the burner sublance 2 and the fuel gas sprayed out of the position with the draft tube secondary nozzle 3 under the rolling of the air pressure around the main flame enter the main flame for burning, the flue gas generated by the flame can be continuously mixed with the fuel gas sprayed by the burner sublance 2 and then sprayed out from the secondary nozzle 3 with the flow guide pipe to be contacted with the main flame for combustion, thereby cooling the flame temperature, effectively reducing the generation of NOx, the fuel gas of the sublance 2 is sprayed into the main flame through the secondary nozzle 3 with the flow guide pipe without leakage, thereby reducing the formation of CO.
The main flame adopts high-speed flue gas velocity, increase the radiant power of radiation chamber, the exhaust gas temperature has been reduced, the efficiency of combustor is improved, make more flue gas mixed gas that inhales the spun fuel gas of sublance more fast and carry the gas mixture enter main flame burning, this kind of flame is straight and powerful, the flue gas velocity is high, be drawn into more flue gases simultaneously, the flame temperature has been reduced, NOx has been reduced promptly and this combustion chamber flue gas backward flow aggravation has been made again, the flue gas heats repeatedly and improves the average heat intensity of combustion chamber, the temperature of high-temperature region has been reduced, improve the temperature of low-temperature region, improve the heating power of combustion chamber, make combustion chamber operation elasticity bigger, and is safer.
While the present invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a low NOx hangs down CO energy-efficient combustor, includes combustor casing (6), characterized by: the combustor is characterized in that a combustor body (4) is arranged at the top end of the combustor shell (6), a cavity inside the combustor body (4) is a combustor (9), a combustor closing-in (5) is arranged inside the top end of the combustor body (4), a secondary nozzle (3) with a flow guide pipe is arranged outside the top end of the combustor body (4), a flue gas backflow channel (10) is arranged between the bottom end of the secondary nozzle (3) with the flow guide pipe and the bottom end of the combustor body (9), a combustor main gun (1) and an incandescent lamp (7) are installed at the bottom end of the combustor shell (6), the combustor main gun (1) and the incandescent lamp (7) both penetrate through the combustor shell (6) and extend to the inside of the combustor (9), a combustor auxiliary gun (2) is installed at the position, below the combustor secondary nozzle (3), corresponding to the bottom end of the combustor shell (6), the burner sublance (2) penetrates through the burner shell (6) and penetrates through the wall body at the lower end of the combustion chamber body (4), and the burner sublance (2) is arranged corresponding to the smoke backflow channel (10).
2. The low NOx and low CO high efficiency energy saving burner of claim 1, wherein: an air inlet is installed on the side face of the burner shell (6), and an air adjusting door (8) is installed inside the air inlet.
3. The low NOx and low CO high efficiency energy saving burner of claim 1, wherein: the combustion chamber body (4) is formed by laying refractory bricks.
4. The low NOx and low CO high efficiency energy saving burner of claim 1, wherein: the diameter of a cavity inside the combustor shell (6) is larger than that of the combustion chamber (9), and the diameter of the combustion chamber (9) is gradually reduced from bottom to top.
5. The low-NOx low-CO high-efficiency energy-saving burner as claimed in claim 1 or 4, wherein: combustor binding off (5) are formed by the inside wall of combustion chamber body (4) to the central shrink, and combustion chamber (9) are through combustor binding off (5) and external intercommunication.
6. The low NOx and low CO high efficiency energy saving burner of claim 1, wherein: the secondary nozzle (3) with the flow guide pipe comprises a secondary nozzle and a flow guide pipe, the flow guide pipe is arranged on the outer surface of the upper end of the combustion chamber body (4), the secondary nozzle is connected to the upper end opening of the flow guide pipe, and the upper end face of the secondary nozzle is higher than the upper end face of the combustion chamber body.
7. The low NOx and low CO high efficiency energy saving burner of claim 6, wherein: the honeycomb duct is connected on the surface of secondary nozzle lower extreme, and the internal surface of secondary nozzle lower extreme is connected on the surface of combustion chamber body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148894.5A CN113864774A (en) | 2021-09-29 | 2021-09-29 | Low-NOx low-CO high-efficiency energy-saving combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148894.5A CN113864774A (en) | 2021-09-29 | 2021-09-29 | Low-NOx low-CO high-efficiency energy-saving combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113864774A true CN113864774A (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111148894.5A Pending CN113864774A (en) | 2021-09-29 | 2021-09-29 | Low-NOx low-CO high-efficiency energy-saving combustor |
Country Status (1)
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|---|---|
| CN (1) | CN113864774A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257927A (en) * | 1991-11-01 | 1993-11-02 | Holman Boiler Works, Inc. | Low NOx burner |
| CN202419652U (en) * | 2011-12-21 | 2012-09-05 | 洛阳瑞昌石油化工设备有限公司 | Low-NOx (nitrogen oxides) environment-friendly combustor by means of combinational combustion |
| CN103742907A (en) * | 2013-12-31 | 2014-04-23 | 北京京诚凤凰工业炉工程技术有限公司 | Self-preheating type burner for low-heating-value converter gas |
| CN104949125A (en) * | 2015-07-24 | 2015-09-30 | 洛阳瑞昌石油化工设备有限公司 | Flat flame burner with large turndown ratio |
| CN105570890A (en) * | 2016-03-15 | 2016-05-11 | 河南方圆工业炉设计制造有限公司 | Hot flue gas self-circulation type ultra-low NOx combustor |
| CN107726323A (en) * | 2017-11-28 | 2018-02-23 | 岳阳钟鼎热工电磁科技有限公司 | Ultra-low NOx emission circular flame oil and gas combination burner |
| CN110553257A (en) * | 2019-09-19 | 2019-12-10 | 洛阳瑞铝耐火材料有限公司 | Novel high-efficiency low NO X burner |
| CN113251418A (en) * | 2021-04-20 | 2021-08-13 | 北京联创鼎新石化设备有限公司 | Low-nitrogen burner of acetylene device preheating furnace |
-
2021
- 2021-09-29 CN CN202111148894.5A patent/CN113864774A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257927A (en) * | 1991-11-01 | 1993-11-02 | Holman Boiler Works, Inc. | Low NOx burner |
| CN202419652U (en) * | 2011-12-21 | 2012-09-05 | 洛阳瑞昌石油化工设备有限公司 | Low-NOx (nitrogen oxides) environment-friendly combustor by means of combinational combustion |
| CN103742907A (en) * | 2013-12-31 | 2014-04-23 | 北京京诚凤凰工业炉工程技术有限公司 | Self-preheating type burner for low-heating-value converter gas |
| CN104949125A (en) * | 2015-07-24 | 2015-09-30 | 洛阳瑞昌石油化工设备有限公司 | Flat flame burner with large turndown ratio |
| CN105570890A (en) * | 2016-03-15 | 2016-05-11 | 河南方圆工业炉设计制造有限公司 | Hot flue gas self-circulation type ultra-low NOx combustor |
| CN107726323A (en) * | 2017-11-28 | 2018-02-23 | 岳阳钟鼎热工电磁科技有限公司 | Ultra-low NOx emission circular flame oil and gas combination burner |
| CN110553257A (en) * | 2019-09-19 | 2019-12-10 | 洛阳瑞铝耐火材料有限公司 | Novel high-efficiency low NO X burner |
| CN113251418A (en) * | 2021-04-20 | 2021-08-13 | 北京联创鼎新石化设备有限公司 | Low-nitrogen burner of acetylene device preheating furnace |
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