CN85100050A - A kind of intensified synclastic fluid flame stabilization and burner thereof - Google Patents
A kind of intensified synclastic fluid flame stabilization and burner thereof Download PDFInfo
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- CN85100050A CN85100050A CN198585100050A CN85100050A CN85100050A CN 85100050 A CN85100050 A CN 85100050A CN 198585100050 A CN198585100050 A CN 198585100050A CN 85100050 A CN85100050 A CN 85100050A CN 85100050 A CN85100050 A CN 85100050A
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- burner
- jet
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- 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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
Abstract
A kind of intensified synclastic fluid flame stabilization and burner thereof, be that high-speed gas jet and low speed fuel-air pre-mixing thing jet flows in the burner by wing passage and main channel respectively, and forming the high speed difference same direction jet, its speed ratio should be greater than 7, thereby produce high temperature recirculation zone.This recirculating zone, it is simple in structure, and operation, control are conveniently.Its combustibility advantage is that fuel can directly enter in the high temperature recirculation zone, thereby makes the heating of coal dust.Burning is strengthened greatly.
The burner that the inventive method is used has one or more and main channel wing passage in the same way on its end face, generally adopt two to be advisable.
" high speed difference same direction jet " overheavy firing and retention flame method can be used for the coal burner in the main jet burner of once-through type coal dust precombustion chamber, pulverized-coal fired boiler and industrial furnace, the kiln.
Description
The invention belongs to combustion technology and energy saver field.
Close technology:
" experimental study of coal dust precombustion chamber boiler " Tsing-Hua University's science and engineering journal 1974,12
" experimental study of coal dust pre-combustion chamber burner and development "
Combustion science and technology 1984 No2
Can the fuel in the burner be strengthened and smooth combustion, is the important topic that combustion technology will be studied.In decades, in the burner of civilian and aircraft industry, traditional flame stabilizing method-cyclone (see in the accompanying drawing 2 7) and bluff body (see in the accompanying drawing 3 8) have generally been adopted.This is successful to gas and fluid combustion.But concerning coal dust firing, especially just not ideal enough to meager coal, colm and anthracite combustion, because in this class burner, coal dust can not enter high temperature recirculation zone (see in the accompanying drawing 2 6), flow through border, recirculating zone (seeing accompanying drawing 2,3) and can only stream, temperature is not high herein, thereby it is unfavorable that coal dust is heated, catches fire and burn, and its combustibility is restricted.
At the problem that said burner exists, the present invention has proposed " high speed difference same direction jet " overheavy firing and retention flame method and corresponding burner thereof in order to seek the combustion technology that is more suitable for coal and difficult combustion fuel combustion characteristics.
Main points of the present invention are, in a burner (1) that wing passage (3) (seeing accompanying drawing 1) arranged, have adopted a kind of " high speed difference same direction jet " overheavy firing and retention flame method.Wing passage of this burner (3) and main channel (2) are in the same way.Wing passage (3) can be the one or more duct of symmetry or asymmetric arrangement, generally adopts two ducts to be advisable.The distance of wing passage (3) and main channel (2) centreline space is greater than half of distance between main channel (2) center line and the burner inner wall.
Method of the present invention is, (seeing accompanying drawing 1) high-speed gas jet and low speed fuel-air pre-mixing thing jet flows into burner (1) by wing passage (3) and main channel (2) respectively, these two strands of jets must form the high speed difference same direction jet, and its speed ratio generally should be greater than 7; Its flow-rate ratio should be greater than 1/30.
Because the strong ejector action of high-speed gas jet, make the air off-axis in the fuel-air premixed material jet of low speed and suck and (see the gas streamline (5) in the accompanying drawing 1) in the high-speed gas jet, thereby make low speed fuel-air pre-mixing thing jet downstream cause negative pressure, and produce strong thermal flue gas back stream, form stable high temperature recirculation zone (see in the accompanying drawing 1 6).Need not mechanical way also can produce strong widely different stream district like this, thereby avoid many disadvantages of causing by mechanical means, for example the bump of the wear problem of cyclone and bluff body, resistance problem, coal dust and stabilizer, separate, settlement issues etc.The advantage in above-mentioned these structures, operation, maintenance, its combustibility also is better than existing coal burner, this is because the fuel in the fuel-air premixed material, coal dust for example, situation under its trend and the conventional stabilisers condition is completely different, because coal grain inertia is bigger, therefore its keeps moving linearly and enters and (see accompanying drawing 1) in the high temperature recirculation zone, make fuel directly be subjected to high temperature gas flow encirclement and consumingly the heating, so that catch fire rapidly, burn, so its combustion stability and combustibility all are better than existing all kinds of burners.Therefore the present invention will become after bluff body and cyclone, have the steady chamber of the third flame method of actual application value in industrial production, will have important function to the burning of strengthening difficult combustion fuel.Another characteristics of the present invention are that the intensity of backflow and the temperature of recirculating zone can be controlled by the flow and the speed of regulating high-speed jet, can accomplish to control artificially the temperature of recirculating zone.
Adopt the burner of " high speed difference same direction jet " overheavy firing and retention flame method design, can not only burn inflammable gas and liquid fuel, and be particularly useful for difficult overheavy firing of firing fuel.For example adopt the coal dust precombustion chamber of this method design, have good combustibility, its outstanding sign is, it can not only be with the steady burning smoke coal of cold wind, and can surely fire meager coal with cold wind, and this is a quantum jump of coal dust firing.And the very low soft coal of calorific value and the anthracite of utmost point difficult to burn also had tangible overheavy firing effect, see the following form.
The comparison that recirculating zone temperature and maximum temperature values change when increasing rapid fire stream and not increasing rapid fire stream
" high speed difference same direction jet " overheavy firing and retention flame method can also be used for the main jet burner of pulverized-coal fired boiler, make coal dust in the main jet burner with regard to initial burning, burning, this has significant role to increasing substantially the steady combustion of colm and anthracitic efficiency of combustion and de-oiling thereof.Equally, this method also can be used for the coal burner in industrial furnace, the kiln.She Ji burner also plays an important role to the burning of strengthening brown coal, heavy oil and water-coal-slurry in this way.
Accompanying drawing 1: with the coal burner schematic diagram of " high speed difference same direction jet " flame stabilizing method
Accompanying drawing 2: cyclone-type burner schematic diagram
Accompanying drawing 3: bluff body type burner schematic diagram
Accompanying drawing 4: with the coal dust precombustion chamber schematic diagram of " high speed difference same direction jet " flame stabilizing method
Embodiment:
Accompanying drawing 4 is that the igniting of a kind of employing " high speed difference same direction jet " overheavy firing of the actual use of certain power plant and the design of retention flame method is with pre-combustion chamber schematic diagram (combustion chamber that also can be used for rectangle or other shape).The pulverized coal flame that produces with precombustion chamber (1) (seeing accompanying drawing 4) replaces fuel oil flame, thereby the coal dust of the boiler main jet burner ejection of igniting, reach a large amount of saving ignition oil purposes, and can realize steady combustion, save the stable combustion oil purpose thereby reach greater amount to underload or burning environment of inferior quality coal.
Its general structure is as follows: main channel (2) pass to a wind (coal dust-air mixture) wing passage (3) and pass to high velocity vapor (or air) jet, effect was best when its speed reached velocity of sound, and at this moment the velocity ratio of two strands of jets is 1: 17(is for air) about.Along with the difference of ature of coal, selected speed is also different.During the ature of coal difference, its velocity ratio capping.Wing passage in this example (3) has adopted the straight tube of two φ 5, is arranged in the bottom of combustion chamber (1), but so both retentions flame can reach the purpose of blowing ash again.Steam pressure is 6kg/cm
2About.Adopt four above-mentioned precombustion chambers, be contained in the proper site of boiler wall, when the coal supply amount of each precombustion chamber reaches 800kg/H, the meager coal pulverized-coal fired boiler of a 75T/H can be lighted, rate of economizing gasoline reaches 99%, and oil-saving effect and economy are very remarkable.
With the coal burner of the present invention design following advantage of having compared with existing coal burner:
1. coal burner of the present invention is simple in structure, and resistance is little, the wear problem of on-bladed or other hardwares, and manufacturing, easy to maintenance is easy to apply.
2. have good burning performance. The recirculating zone temperature increases substantially in the burner, on average improves approximately about 300 ℃ and (sees the following form), and high-temperature region and fire location shift to an earlier date greatly, so combustion stability and reinforcement are all better, for example still can surely fire meager coal under the cold wind condition.
The comparison that recirculating zone temperature and maximum temperature values change when adding high-speed jet and not adding high-speed jet
3. the burner of the present invention's design is easy to realize design standard and seriation.
4. the recirculating zone temperature can be regulated by the control to jet flow in the burner, thereby realizes Stepless temperature-regulating, to adapt to the changeable needs of coal, this is that existing any other burner is not accomplished.
5. coal burner of the present invention can adopt steam to make high-speed jet gas, and is simple in power plant.
The present invention will have broad application prospects in power-saving technology, and it can be used for existing coal-powder boiler, heavy oil stove are transformed, thereby reach a large amount of fuel-economizings, the purpose of economizing on coal, obvious economic.Can be used for again in the design of new stove,, make utilizing of the energy more economical rationally so that produce high efficiency burner.
Claims (13)
1, a kind of intensified synclastic fluid flame stabilization, it is characterized in that high-speed gas jet passes through wing passage [3] and flows into burner [1], low speed fuel-air pre-mixing thing jet flows into burner [1] by main channel [2], forms the high speed difference same direction jet, and its speed ratio should be greater than 7.
2,, it is characterized in that and by regulating the size of high-speed jet speed, to control the intensity and the temperature thereof of backflow according to fuel used difference according to the said method of claim 1.
3, according to the said method of claim 1, it is characterized in that the flow of gas jet wants enough big, and different with fuel used difference.At a high speed should be greater than 1/30 with the flow-rate ratio of low-speed jet.
4,, it is characterized in that high-speed gas jet adopts air or steam jet according to the said method of claim 1-3.
5, according to claim 1,2,3 said methods is characterized in that fuel-air premixed material is to be mixed by gas or liquid fuel and air.
6, according to claim 1,2,3 said methods is characterized in that said fuel-air premixed material is by bituminous coal powder and air, or meager coal powder and air mix.
7, according to claim 1,2,3 said methods is characterized in that said fuel-air premixed material is by coal dust inferior and air, or anchracite duff and air mix.
8, according to claim 1,2,3 said methods is characterized in that said fuel-air premixed material is by water-coal-slurry mist and air, or brown coal powder and air mix.
9, a kind of claim 1 that is used for, the burner of 2,3 said methods is characterized in that on the end face (4) of this burner (1), there is wing passage (3) on main channel (2) side.
10,, it is characterized in that distance between wing passage (3) and main channel (2) center line is greater than half of distance between main channel (2) center line and the burner according to the said burner of claim 9 (1).
11,, it is characterized in that said wing passage (3) is one or more and duct in the same way, main channel (2), generally is advisable with two ducts according to the said burner of claim 9 (1).
12, a kind of by claim 1, the purposes of the burner (1) of 2,3,4,6,7,8 said method designs is characterized in that it is applicable to once-through type coal dust precombustion chamber.
13, a kind of by claim 1, the purposes of the burner (1) of 2,3,4,6,7,8 said methods design is characterized in that it is applicable to coal burner in pulverized-coal fired boiler main jet burner and industrial furnace, the kiln.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100050A CN85100050B (en) | 1985-04-01 | 1985-04-01 | Intensified synclastic fluid flame stabilization and the burner |
| DE19863609622 DE3609622A1 (en) | 1985-04-01 | 1986-03-21 | Method of flame stabilisation and combustion intensification as well as burner and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100050A CN85100050B (en) | 1985-04-01 | 1985-04-01 | Intensified synclastic fluid flame stabilization and the burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100050A true CN85100050A (en) | 1986-06-10 |
| CN85100050B CN85100050B (en) | 1986-06-10 |
Family
ID=4790846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100050A Expired CN85100050B (en) | 1985-04-01 | 1985-04-01 | Intensified synclastic fluid flame stabilization and the burner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN85100050B (en) |
| DE (1) | DE3609622A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230618A (en) * | 2011-06-17 | 2011-11-02 | 江苏太湖锅炉股份有限公司 | Combustion chamber structure with adjustable flue gas temperature |
| CN102374526A (en) * | 2010-08-20 | 2012-03-14 | 贵州航空发动机研究所 | Low volatile coal water slurry combustion device |
| CN102563627A (en) * | 2012-02-29 | 2012-07-11 | 中国计量学院 | Efficient pulverized coal industrial boiler with low-pollution emission characteristic |
| CN106969347A (en) * | 2017-05-16 | 2017-07-21 | 中煤科工清洁能源股份有限公司 | A kind of boiler with the fiery device of lock |
| CN111457377A (en) * | 2020-04-21 | 2020-07-28 | 武汉科技大学 | High-speed burner with large speed difference and flue gas circulation and ultralow nitrogen oxide and control method thereof |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0312562A1 (en) * | 1987-04-30 | 1989-04-26 | MAY, Michael, G. | Process and device for combustion of fuel |
| DE3903888C2 (en) * | 1989-02-10 | 1998-04-16 | Castolin Sa | Flame spraying device |
| DE8916022U1 (en) * | 1989-11-24 | 1993-02-11 | VEAG Vereinigte Energiewerke AG, 10115 Berlin | Arrangement for temperature measurement of coal dust burner flames |
| EP0754908B2 (en) * | 1995-07-20 | 2001-04-18 | DVGW Deutscher Verein des Gas- und Wasserfaches -Technisch-wissenschaftliche Vereinigung- | Method and apparatus for suspressing flame and pressure vibrations in a furnace |
| DE19526369A1 (en) * | 1995-07-20 | 1997-01-23 | Dvgw Ev | Method and appliance for eliminating fluctuations in flames and pressure in furnace with flame-producing burner |
-
1985
- 1985-04-01 CN CN85100050A patent/CN85100050B/en not_active Expired
-
1986
- 1986-03-21 DE DE19863609622 patent/DE3609622A1/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374526A (en) * | 2010-08-20 | 2012-03-14 | 贵州航空发动机研究所 | Low volatile coal water slurry combustion device |
| CN102230618A (en) * | 2011-06-17 | 2011-11-02 | 江苏太湖锅炉股份有限公司 | Combustion chamber structure with adjustable flue gas temperature |
| CN102563627A (en) * | 2012-02-29 | 2012-07-11 | 中国计量学院 | Efficient pulverized coal industrial boiler with low-pollution emission characteristic |
| CN102563627B (en) * | 2012-02-29 | 2013-10-23 | 中国计量学院 | Efficient pulverized coal industrial boiler with low-pollution emission characteristic |
| CN106969347A (en) * | 2017-05-16 | 2017-07-21 | 中煤科工清洁能源股份有限公司 | A kind of boiler with the fiery device of lock |
| CN106969347B (en) * | 2017-05-16 | 2023-11-03 | 中煤科工清洁能源股份有限公司 | Boiler with fire locking device |
| CN111457377A (en) * | 2020-04-21 | 2020-07-28 | 武汉科技大学 | High-speed burner with large speed difference and flue gas circulation and ultralow nitrogen oxide and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3609622A1 (en) | 1986-12-11 |
| CN85100050B (en) | 1986-06-10 |
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