CN114877322B - Flame regulation type cyclone burner - Google Patents
Flame regulation type cyclone burner Download PDFInfo
- Publication number
- CN114877322B CN114877322B CN202210413185.3A CN202210413185A CN114877322B CN 114877322 B CN114877322 B CN 114877322B CN 202210413185 A CN202210413185 A CN 202210413185A CN 114877322 B CN114877322 B CN 114877322B
- Authority
- CN
- China
- Prior art keywords
- flame
- air pipe
- air
- regulator
- secondary air
- 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.)
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- 239000003245 coal Substances 0.000 claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 6
- 238000004939 coking Methods 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 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
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure 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
- 238000010992 reflux Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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 regulation 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 first air pipe and a second air pipe; 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 an air box through an air duct; the secondary air pipe in the bellows is provided with a plurality of radial air inlet holes, swirl 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; the method is characterized in that: a cylindrical flame regulator is sleeved outside the front section of the primary air pipe, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided 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 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 of multiple coal types.
Description
Technical Field
The invention relates to a cyclone burner, in particular to a cyclone burner capable of performing flame regulation.
Background
The pulverized coal cyclone burner is widely applied to a power station boiler, is core equipment of a combustion system, and is a main stream cyclone burner at present, 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 an air box through an air duct; the secondary air pipe in the bellows is provided with a plurality of radial air inlet holes, swirl 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; the device can realize the adjustment of air quantity, rotational flow intensity and the like, and has a certain degree of coal adaptability. However, under the background of current shortage of coal supply, complex and changeable coal quality and high coal price, low-quality bituminous coal and lean coal with relatively low price are selected for reducing the power generation cost, even coal slime is mixed and burned, the low-volatile coal is difficult to catch fire, the burnout property is poor, and the ultra-low load peak regulation task is overlapped, so that the existing pulverized coal cyclone burner cannot adapt to the low-volatile lean coal for combustion, has poor low load stable combustion capability and weak deep peak regulation capability, and cannot meet the requirements
The combustion stability of low-grade coal under low load is required in a thermal power plant.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a flame regulation type cyclone burner which can realize 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 multiple coal adaptability.
In order to achieve the above purpose, the flame regulation type cyclone burner of the invention 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 an air box through an air duct; the secondary air pipe in the bellows is provided with a plurality of radial air inlet holes, swirl 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; the method is characterized in that: a cylindrical flame regulator is sleeved outside the front section of the primary air pipe, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided 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 bellows, the secondary air pipe and the swirl blades, the mixing position of the secondary air and the primary air powder depends on the position of the flame regulator, when the flame regulator advances to the hearth direction through the pull rod, the two are mixed in a postponed mode, and when the flame regulator retreats, the two are mixed in advance; when the flame regulator moves backwards, the nozzle area forms a small-space precombustion chamber, the precombustion chamber can gather a small amount of heat in the initial stage, the temperature of the nozzle area is improved, the pulverized coal airflow is quickly ignited, the combustion stability of low-volatile coal is enhanced, and the depth peak regulation capability is improved; when the volatile component of the coal is improved and a higher ignition temperature is not needed, the flame regulator can be pushed to the direction of the hearth in order to prevent the ignition from being too early and the coking and burning loss of the front section of the burner of the precombustor; the invention can realize 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 of multiple coal types;
as a further improvement of the invention, the front section of the flame regulator is provided with an inclined angle of 0-90 degrees, and the inclined angle is provided with a plurality of small holes in the circumferential direction; the air in the small holes on the expander is firstly mixed with the primary air powder, the air outside the expander is mixed with the primary air powder again, the staged combustion is realized, an annular backflow area is formed, the emission of NOx can be reduced, and the small holes can also prevent the combustion loss of the expander and the coking of the fire surface;
as a further improvement of the invention, a front baffle and a rear baffle which are matched with the roller wheels are fixedly arranged outside the front section of the primary air pipe; the flame regulator can be limited at front and back;
as a further improvement of the invention, the rear end plate of the secondary air pipe is connected with a plurality of fire-watching pipes; the combustion and coking state in the precombustion chamber can be visually observed, and the device can be used as a basis for adjusting the flame regulator;
as a further improvement of the invention, a coal dust concentrator is arranged outside the front end of the central air duct; the primary air powder passes through the pulverized coal concentrator, and then the concentrated pulverized coal is arranged on the outer ring, the light pulverized coal is arranged on the inner ring, and the pulverized coal is easier to ignite;
as a further improvement of the invention, the root of the inner side of the expansion cone of the flame regulator; the combustion stability can be further improved;
as a further improvement of the invention, a thermocouple is arranged in the central air duct; the combustion state of the nozzle before and after adjustment can be judged and the adjustment effect can be judged through temperature change;
in conclusion, the invention can realize 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 of multiple coal types.
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, a flame regulation type swirl burner of this embodiment includes a windbox 1, a secondary air duct 2, a primary air duct 3 and a central air duct 4 which are sequentially disposed 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 in each row, 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, an inclined angle expander 14 is arranged at the front section of the flame regulator 11, the inclined angle is between 0 and 90 degrees, a plurality of small holes 15 are formed in the circumferential direction of the expander 14, and a plurality of combustion stabilizing teeth 16 are formed in the inner root of the expander 14; four fire-viewing pipes 17 are connected to the rear end plate of the secondary air pipe 2, and the fire-viewing pipes 17 are positioned at the outer side of the flame regulator 11 in the radial direction; a front baffle 18 and a rear baffle 19 matched with the roller 12 are fixedly welded on the outer part of the front section of the primary air pipe 3; a coal dust concentrator 21 is arranged outside the front end of the central air duct 4;
when the air conditioner is used, the oil gun 5 and the igniter 6 are ignited in the central air duct 4, the central air duct 4 is connected with the air box 1 and takes air, the central air burns and supplements oxygen for the oil gun 5, and the central air is used as equipment for cooling the oil gun 5 and the like after the ignition is finished; the primary air-powder mixture enters the primary air pipe 3 and is sprayed into the furnace for combustion through the coal powder concentrator 21; the secondary air forms tangential rotation after passing through the wind box 1, the secondary air pipe 2 and the cyclone blades 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 advances towards the hearth through the pull rod 13, the two are mixed later, and when the flame regulator 11 retreats, the two are mixed in advance; when the flame regulator 11 moves backwards, the nozzle area forms a small-space precombustion chamber, the precombustion chamber can collect a small amount of heat in the initial stage, 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 depth peak regulation capability is improved; when the volatile component of the coal is increased and a higher ignition temperature is not needed, the flame regulator 11 can be pushed to the hearth direction in order to prevent the ignition from being too early and the coking and burning loss of the front section of the burner of the precombustor; the invention can realize 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 of multiple coal types; the wind in the small holes 15 on the expansion cone 14 is firstly mixed with primary wind powder, the wind outside the expansion cone 14 is mixed with the primary wind powder again, the staged combustion is realized, an annular backflow area is formed, the emission of NOx can be reduced, and the small holes 15 can also prevent the expansion cone from burning and coking to the fire surface; the front baffle 18 and the rear baffle 19 can limit the flame regulator 11 forwards and backwards, and can limit the advancing position of the flame regulator in order to prevent oil flame from flushing the front end of the flame regulator 11 during ignition; the combustion and coking state in the precombustion chamber can be visually observed through a plurality of fire-watching pipes 17 and used as the basis for adjusting the flame regulator 11; the primary air powder passes through the coal powder concentrator 21, then the outer ring is concentrated coal powder, the inner ring is light coal powder, and then the primary air powder passes through the plurality of stable combustion teeth 16 to form a small reflux zone locally, so that the coal powder is easier 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 regulation 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 an air box through an air duct; the secondary air pipe in the bellows is provided with a plurality of radial air inlet holes, swirl 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; the method is characterized in that: a cylindrical flame regulator is sleeved outside the front section of the primary air pipe, the flame regulator is connected with more than two rows of rollers, each row of rollers is provided 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 swirl burner as in claim 1, wherein: the front section of the flame regulator is provided with an inclination angle of 0-90 degrees, and the inclination angle of the front section of the flame regulator is provided with a plurality of small holes in the circumferential direction.
3. A flame-regulated swirl burner as claimed in claim 1 or 2, wherein: the front baffle and the rear baffle which are matched with the roller are fixedly arranged outside the front section of the primary air pipe.
4. A flame-regulated swirl burner as in claim 3, wherein: the rear end plate of the secondary air pipe is connected with a plurality of fire-viewing pipes.
5. A flame-regulated swirl burner as in claim 4, wherein: and a coal powder concentrator is arranged outside the front end of the central air duct.
6. A flame-regulated swirl burner as in claim 2, wherein: the inner root of the expanding cone of the flame regulator is provided with a plurality of combustion stabilizing teeth.
7. A flame-regulated swirl burner as 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 CN114877322A (en) | 2022-08-09 |
| CN114877322B true CN114877322B (en) | 2023-11-03 |
Family
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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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN114877322A (en) | 2022-08-09 |
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