CN114877322A - Flame regulation formula cyclone burner - Google Patents
Flame regulation formula cyclone burner Download PDFInfo
- Publication number
- CN114877322A CN114877322A CN202210413185.3A CN202210413185A CN114877322A CN 114877322 A CN114877322 A CN 114877322A CN 202210413185 A CN202210413185 A CN 202210413185A CN 114877322 A CN114877322 A CN 114877322A
- Authority
- CN
- China
- Prior art keywords
- air
- flame
- air pipe
- regulator
- central
- 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.)
- Granted
Links
- 239000003245 coal Substances 0.000 claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims 6
- 239000000843 powder Substances 0.000 description 25
- 238000004939 coking Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a flame adjusting type cyclone burner which comprises an air box, a secondary air pipe, a primary air pipe and a central air cylinder, wherein the air box is provided with a plurality of air outlets; an oil gun and an igniter are arranged in the central air duct, and the rear end of the central air duct is connected with the air box through an air duct; the secondary air pipe in the air box is provided with a plurality of radial air inlet holes, swirl vanes are arranged in the air inlet holes, and the front end of the secondary air pipe is provided with a water-cooled wall flaring; the method is characterized in that: the front section of the primary air pipe is externally sleeved with a cylindrical flame regulator, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided with a plurality of rollers, the flame regulator is connected with a pull rod, and the pull rod penetrates through the rear end plate of the secondary air pipe and the rear panel of the air box; the invention can realize wide-range regulation of the ignition position and the ignition area temperature, improve the combustion stability of low-volatile coal, enhance the low-load stable combustion capability and the deep peak regulation capability, and has the adaptability to various coals.
Description
Technical Field
The invention relates to a cyclone burner, in particular to a cyclone burner capable of adjusting flame.
Background
The pulverized coal cyclone burner is widely applied to a power station boiler, is a core device of a combustion system, and comprises an air box, a secondary air pipe, a primary air pipe and a central air cylinder; an oil gun and an igniter are arranged in the central air duct, and the rear end of the central air duct is connected with the air box through an air duct; the secondary air pipe in the air box is provided with a plurality of radial air inlet holes, swirl vanes are arranged in the air inlet holes, and the front end of the secondary air pipe is provided with a water-cooled wall flaring; the device can realize the adjustment of air quantity, rotational flow strength and the like, and has certain coal adaptability. However, under the background of the current shortage of coal supply, complex and variable coal quality and high coal price, poor bituminous coal, lean coal and even coal slurry are selected for reducing the power generation cost in a coal-fired power plant, the low-volatile coal is difficult to ignite and poor in burnout property, and an ultra-low load peak regulation task is superposed, so that the existing pulverized coal cyclone burner cannot adapt to the low-volatile lean coal for combustion, has the defects of poor low-load stable combustion capability and poor deep peak regulation capability, and cannot meet the requirement of the low-load peak regulation task
The requirement of the thermal power plant for combustion stability of the low-quality coal under low load.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a flame regulation type cyclone burner which can realize the wide-range regulation of the ignition position and the ignition region temperature, improves the combustion stability of low-volatile coal, enhances the low-load stable combustion capability and the deep peak regulation capability and has the adaptability to various coals.
In order to achieve the aim, the flame adjusting type cyclone burner comprises an air box, a secondary air pipe, a primary air pipe and a central air cylinder; an oil gun and an igniter are arranged in the central air duct, and the rear end of the central air duct is connected with the air box through an air duct; the secondary air pipe in the air box is provided with a plurality of radial air inlet holes, swirl vanes are arranged in the air inlet holes, and the front end of the secondary air pipe is provided with a water-cooled wall flaring; the method is characterized in that: the front section of the primary air pipe is sleeved with a cylindrical flame regulator, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided with a plurality of rollers, the flame regulator is connected with a pull rod, and the pull rod penetrates through the rear end plate of the secondary air pipe and the rear panel of the air box.
When the invention is used, the primary air-powder mixture enters the primary air pipe and is sprayed into the furnace for combustion; the secondary air forms tangential rotation after passing through the air box, the secondary air pipe and the swirl vanes, the mixing position of the secondary air and the primary air powder depends on the position of the flame regulator, when the flame regulator is pushed towards the hearth direction through the pull rod, the mixing of the secondary air and the primary air powder is delayed, and when the flame regulator is retreated, the secondary air and the primary air powder are mixed in advance; when the flame regulator moves backwards, a small-space pre-combustion chamber is formed in the nozzle area, a small amount of heat in the initial stage can be gathered by the pre-combustion chamber, the temperature of the nozzle area is increased, the pulverized coal airflow is quickly ignited, the combustion stability of low-volatile coal is enhanced, and the deep peak regulation capability is improved; when the volatile component of coal is increased and higher ignition temperature is not needed, the flame regulator can be pushed towards the hearth to prevent too early ignition, coking of the precombustion chamber and burning loss of the front section of the burner; the invention can realize the wide-range regulation of the ignition position and the ignition area temperature, improve the combustion stability of low-volatile coal, enhance the low-load stable combustion capability and the deep peak regulation capability, and has the adaptability to various coals;
as a further improvement of the invention, the front section of the flame regulator is provided with an inclined-angle expanding cone, the inclined angle is 0-90 degrees, and the expanding cone is provided with a plurality of small holes in the circumferential direction; the air in the small holes on the expanding cone is firstly mixed with primary air powder, and the air outside the expanding cone is then mixed with the primary air powder, so that staged combustion is realized, an annular backflow area is formed, NOx emission can be reduced, and the small holes can prevent the expanding cone from burning and coking towards a fire surface;
as a further improvement of the invention, a front baffle and a rear baffle matched with the roller are fixedly arranged outside the front section of the primary air pipe; the flame regulator can be limited in front and back;
as a further improvement of the invention, a plurality of fire observation tubes are connected to the rear end plate of the secondary air pipe; the combustion and coking states in the precombustion chamber can be visually observed and can be used as the basis for adjusting the flame regulator;
as a further improvement of the invention, a pulverized coal concentrator is arranged outside the front end of the central wind barrel; the outer ring of the primary air powder after passing through the coal powder concentrator is concentrated coal powder, and the inner ring of the primary air powder is light coal powder, so that the coal powder is easier to ignite;
as a further improvement of the invention, the inner root of the flaring cone of the flame adjuster; combustion stability can be further improved;
as a further improvement of the invention, a thermocouple is arranged in the central wind tube; the combustion state of the nozzle before and after adjustment and the adjustment effect can be judged through temperature change;
in conclusion, the invention can realize the wide-range adjustment of the ignition position and the ignition area temperature, improve the combustion stability of low-volatile coal, enhance the low-load stable combustion capability and the deep peak regulation capability, and has the adaptability to various coals.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a right side view of fig. 1.
Fig. 3 is a left side view of the front end spout of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the flame regulation type cyclone burner of the embodiment includes an air box 1, a secondary air pipe 2, a primary air pipe 3 and a central air duct 4 which are arranged in sequence from outside to inside; an oil gun 5, an igniter 6 and a thermocouple 7 are arranged in the central air duct 4, and the rear end of the central air duct 4 is connected with the air box 1 through an air duct 8; the secondary air pipe 2 in the air box 1 is provided with a plurality of radial air inlet holes, swirl vanes 9 are arranged in the air inlet holes, and the front end of the secondary air pipe 2 in front of the air box 1 is provided with a water-cooled wall flaring 10; a cylindrical flame regulator 11 is sleeved outside the front section of the primary air pipe 3, the flame regulator 11 is connected with two rows of four rollers 12, each row of four rollers 12 is connected with the flame regulator 11, the flame regulator 11 is connected with two pull rods 13, the pull rods 13 penetrate through the rear end plate of the secondary air pipe 2 and the rear panel of the air box 1, the front section of the flame regulator 11 is provided with an inclined-angle expanding cone 14, the inclined angle is 0-90 degrees, the expanding cone 14 is circumferentially provided with a plurality of small holes 15, and the root part of the inner side of the expanding cone 14 is provided with a plurality of combustion stabilizing teeth 16; the rear end plate of the secondary air pipe 2 is connected with four fire observation pipes 17, and the fire observation pipes 17 are radially positioned on the outer side of the flame regulator 11; a front baffle 18 and a rear baffle 19 matched with the roller 12 are fixedly welded outside the front section of the primary air pipe 3; a pulverized coal concentrator 21 is arranged outside the front end of the central wind barrel 4;
when the central air-cooling oil gun is used, the oil gun 5 and the igniter 6 are ignited in the central air pipe 4, the central air pipe 4 is connected with the air box 1 and takes air, the central air supplies oxygen for the oil gun 5 to burn, and the central air is used for cooling equipment such as the oil gun 5 after ignition is finished; the primary air-powder mixture enters a primary air pipe 3 and is sprayed into the furnace for combustion through a coal powder concentrator 21; the secondary air forms tangential rotation after passing through the air box 1, the secondary air pipe 2 and the swirl vanes 9, the mixing position of the secondary air and the primary air powder depends on the position of the flame regulator 11, when the flame regulator 11 is pushed towards the hearth direction through the pull rod 13, the mixing of the secondary air and the primary air powder is delayed, and when the flame regulator 11 is retreated, the mixing of the secondary air and the primary air powder is advanced; when the flame regulator 11 moves backwards, a small-space pre-combustion chamber is formed in the nozzle area, a small amount of heat in the initial stage can be gathered by the pre-combustion chamber, the temperature of the nozzle area is increased, the pulverized coal airflow is quickly ignited, the combustion stability of low-volatile coal is enhanced, and the deep peak regulation capability is improved; when the volatile component of the coal is increased and higher ignition temperature is not needed, the flame regulator 11 can be pushed towards the hearth to prevent too early ignition, coking of the precombustion chamber and burning loss of the front section of the burner; the invention can realize the wide-range regulation of the ignition position and the ignition area temperature, improve the combustion stability of low-volatile coal, enhance the low-load stable combustion capability and the deep peak regulation capability, and has the adaptability to various coals; the air in the small holes 15 on the expanding cone 14 is firstly mixed with primary air powder, the air outside the expanding cone 14 is then mixed with the primary air powder, the staged combustion is realized, an annular backflow area is formed, the NOx emission can be reduced, and the small holes 15 can prevent the expanding cone from burning and coking towards the fire surface; the front baffle 18 and the rear baffle 19 can limit the flame regulator 11 forwards and backwards, and can also limit the advancing position of the flame regulator in order to prevent oil flame from scouring the front end of the flame regulator 11 during ignition; the combustion and coking states in the precombustion chamber can be visually observed through a plurality of fire observation pipes 17 and used as the basis for adjusting the flame regulator 11; after the primary air powder passes through the coal powder concentrator 21, the outer ring is thick coal powder, the inner ring is thin coal powder, and a small backflow area is formed in the local part after the primary air powder passes through the plurality of combustion stabilizing teeth 16, so that the coal powder is easy to ignite, and the combustion stability can be further improved; the thermocouple 7 can judge the combustion state of the nozzle before and after adjustment and judge the adjustment effect through temperature change.
Claims (7)
1. A flame adjusting type cyclone burner comprises an air box, a secondary air pipe, a primary air pipe and a central air cylinder; an oil gun and an igniter are arranged in the central air duct, and the rear end of the central air duct is connected with the air box through an air duct; the secondary air pipe in the air box is provided with a plurality of radial air inlet holes, rotational flow blades are arranged in the air inlet holes, and the front end of the secondary air pipe is provided with a water-cooled wall flaring opening; the method is characterized in that: the front section of the primary air pipe is sleeved with a cylindrical flame regulator, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided with a plurality of rollers, the flame regulator is connected with a pull rod, and the pull rod penetrates through the rear end plate of the secondary air pipe and the rear panel of the air box.
2. A flame-regulated cyclonic burner as claimed in claim 1, wherein: the front section of the flame regulator is provided with an inclined angle extending cone, the inclined angle is 0-90 degrees, and the extending cone is provided with a plurality of small holes in the circumferential direction.
3. A flame-regulated cyclonic burner as claimed in claim 1 or 2, wherein: and a front baffle and a rear baffle matched with the roller are fixedly arranged outside the front section of the primary air pipe.
4. A flame-regulated cyclonic burner as claimed in claim 3, wherein: and a plurality of fire watching pipes are connected to the rear end plate of the secondary air pipe.
5. A flame-regulated cyclonic burner as claimed in claim 4, wherein: a pulverized coal concentrator is arranged outside the front end of the central wind barrel.
6. A flame-regulated cyclonic burner as claimed in claim 2, wherein: the root part of the inner side of the expanding cone of the flame regulator is provided with a plurality of stable combustion teeth.
7. A flame-regulated cyclonic burner as claimed in claim 6, wherein: a thermocouple is arranged in the central air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413185.3A CN114877322B (en) | 2022-04-20 | 2022-04-20 | Flame regulation type cyclone burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413185.3A CN114877322B (en) | 2022-04-20 | 2022-04-20 | Flame regulation type cyclone burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114877322A true CN114877322A (en) | 2022-08-09 |
| CN114877322B CN114877322B (en) | 2023-11-03 |
Family
ID=82670977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210413185.3A Active CN114877322B (en) | 2022-04-20 | 2022-04-20 | Flame regulation type cyclone burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114877322B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117308081A (en) * | 2023-09-27 | 2023-12-29 | 国电长源汉川第一发电有限公司 | Plasma burner with adjustable burning distance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87205529U (en) * | 1987-12-01 | 1988-09-28 | 华东冶金学院 | Double-flame burning-nozzle for coal powder |
| CN1673620A (en) * | 2004-03-24 | 2005-09-28 | 巴布考克日立株式会社 | Burner, fuel combustion method and boiler retrofit method |
| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
| CN102434878A (en) * | 2011-09-09 | 2012-05-02 | 华中科技大学 | Three-layer secondary air low nitrogen oxide swirling burner |
| CN102927569A (en) * | 2012-11-08 | 2013-02-13 | 东方电气集团东方锅炉股份有限公司 | Horizontal flow burner |
| GB201307517D0 (en) * | 2013-04-25 | 2013-06-12 | Rjm Corp Ec Ltd | Nozzle for power station burner and method for use thereof |
| DE102012007884A1 (en) * | 2012-04-23 | 2013-10-24 | Babcock Borsig Steinmüller Gmbh | Burner for dust and / or particulate fuels with variable swirl |
| CN208025506U (en) * | 2018-01-26 | 2018-10-30 | 山东大学 | A kind of coal burner |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN111536511A (en) * | 2020-05-27 | 2020-08-14 | 江苏申港锅炉有限公司 | Pulverized coal cyclone burner |
| CN211290054U (en) * | 2019-11-12 | 2020-08-18 | 江苏卡瓦诺热能科技有限公司 | Split type combustor convenient to dismouting |
-
2022
- 2022-04-20 CN CN202210413185.3A patent/CN114877322B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62190311A (en) * | 1985-10-31 | 1987-08-20 | Nippon Nenshiyou Syst Kk | Radiant tube burner |
| CN87205529U (en) * | 1987-12-01 | 1988-09-28 | 华东冶金学院 | Double-flame burning-nozzle for coal powder |
| CN1673620A (en) * | 2004-03-24 | 2005-09-28 | 巴布考克日立株式会社 | Burner, fuel combustion method and boiler retrofit method |
| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
| CN102434878A (en) * | 2011-09-09 | 2012-05-02 | 华中科技大学 | Three-layer secondary air low nitrogen oxide swirling burner |
| DE102012007884A1 (en) * | 2012-04-23 | 2013-10-24 | Babcock Borsig Steinmüller Gmbh | Burner for dust and / or particulate fuels with variable swirl |
| CN102927569A (en) * | 2012-11-08 | 2013-02-13 | 东方电气集团东方锅炉股份有限公司 | Horizontal flow burner |
| GB201307517D0 (en) * | 2013-04-25 | 2013-06-12 | Rjm Corp Ec Ltd | Nozzle for power station burner and method for use thereof |
| CN208025506U (en) * | 2018-01-26 | 2018-10-30 | 山东大学 | A kind of coal burner |
| CN211290054U (en) * | 2019-11-12 | 2020-08-18 | 江苏卡瓦诺热能科技有限公司 | Split type combustor convenient to dismouting |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN111536511A (en) * | 2020-05-27 | 2020-08-14 | 江苏申港锅炉有限公司 | Pulverized coal cyclone burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117308081A (en) * | 2023-09-27 | 2023-12-29 | 国电长源汉川第一发电有限公司 | Plasma burner with adjustable burning distance |
| CN117308081B (en) * | 2023-09-27 | 2024-05-07 | 国电长源汉川第一发电有限公司 | Plasma burner with adjustable burning distance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114877322B (en) | 2023-11-03 |
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