CN109114545A - Burning process and multistage burner - Google Patents
Burning process and multistage burner Download PDFInfo
- Publication number
- CN109114545A CN109114545A CN201810650500.8A CN201810650500A CN109114545A CN 109114545 A CN109114545 A CN 109114545A CN 201810650500 A CN201810650500 A CN 201810650500A CN 109114545 A CN109114545 A CN 109114545A
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- Prior art keywords
- primary
- fuel
- supply pipe
- region
- air supply
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/042—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with fuel supply in stages
-
- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
-
- 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
-
- 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
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- 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
- F23C2700/00—Special arrangements for combustion apparatus using fluent fuel
- F23C2700/06—Combustion apparatus using pulverized fuel
- F23C2700/063—Arrangements for igniting, flame-guiding, air supply in
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
With longitudinal axis and including primary combustion region and relative to the burning process of sustained combustion fuel in this radial deflection and the combustion chamber in after-flame region that axially offsets, there are following steps: supplying primary air to primary combustion region by the primary air supply pipe eddy flow with primary combustion region arranged concentric；Fuel is supplied to primary combustion region by the fuel feed pipe around primary air supply pipe arranged concentric；Fuel and primary air burn to form primary flame；Secondary air is supplied to primary combustion region by the secondary air supply pipe eddy flow around fuel feed pipe arranged concentric；Fuel imperfect combustion in primary combustion region primary reaction；Burning-out zone domain is flow to around the third level air supply pipe supply third level air of its arranged concentric in secondary air supply pipe downstream by along axial direction；The part reaction product and residual fuel of primary reaction are in after-flame zonal combustion；Fuel is 0.1 ~ 0.9 in the unburnt air ratio of primary combustion region.
Description
Technical field
The present invention relates to a kind of operations for burning fuel, particularly the combustion chamber of combustion powder shape fuel.
Background technique
The combustion chamber well known in the art for capableing of combustion powder shape fuel.In this regard, the combustion chamber includes primary combustion
Region and after-flame region, wherein generating ignition flame in primary combustion region by igniter fuel, ignition flame is lighted powdered
Fuel.
The mainly coal dust used as powdered fuel.China is the staple market of coal-dust combustion device.At present due to
Often very high dust load and correspondingly very high smog value, can be applicable in especially low NO herein in cityxLimit value (example
It is such as 150mg/Nm in Shenyang3, it is 100mg/Nm in Qingdao3), so that the common burning process for coal dust needs expensive give up
Gas after-treatment system, because of the NO without secondary measurexDischarge value can approach about 400mg/Nm3.Pass through SCR(Selective
Catalytic Reaction, SCR technology) equipment or urea injection can achieve defined exhaust gas value.But it is secondary
The equipment land occupation that grade measure needs is huge, and investment operating cost is high.
Summary of the invention
The present invention is directed to realize that NO is greatly lowered in process of coal combustionxDischarge value.For this purpose, the invention proposes one
Kind new combustion technique and the combustion chamber for realizing corresponding burning process.
According to the present invention, hair is realized by the burning process for the sustained combustion fuel in the combustion chamber with longitudinal axis
Improving eyesight, the after-flame that combustion chamber includes primary combustion region and radially offsets from relative to primary combustion region and be axially staggered
Region, burning process have follow steps:
A) primary air is supplied in a manner of eddy flow by the primary air supply pipe with primary combustion region arranged concentric
In primary combustion region；
B) it is supplied fuel in primary combustion region by the fuel feed pipe around primary air supply pipe arranged concentric；
C) fuel and primary air burn to form primary flame；
D) secondary air is supplied in a manner of eddy flow by the secondary air supply pipe around fuel feed pipe arranged concentric
In primary combustion region；
E) fuel imperfect combustion in primary reaction in primary combustion region；
F) third level air stream is supplied in after-flame region by third level air supply pipe, third level air supply pipe is along axis
To the downstream for being arranged in secondary air supply pipe and surround secondary air supply pipe arranged concentric；
G) the part reaction product from primary reaction and residual fuel burn in after-flame region；
Wherein, when air ratio is 0.1 to 0.9, fuel carries out imperfect combustion in primary combustion region.
NO is made by simple primary measure with above-mentioned burning process according to the present inventionxDischarge value reaches 200mg/Nm3
Below.Therefore, the present invention passes through very simple secondary measure, such as uses SNCR(Selective Non-Catalytic
Reaction, selective non-catalytic reduction technology) equipment, it can be NOxDischarge value drops to 100mg/Nm3Below.This mainly passes through
The classification of air supply pipe is realized.In this regard, air share needed for the primary reaction occurred in primary combustion region is few.Herein
According to the present invention, air can be 0.1 ~ 0.9 than value interval, and preferably section is 0.1 ~ 0.5, and further preferred section is 0.2
~0.4.Other air (third level air) are supplied in after-flame region, continue the reaction product of fuel or primary reaction
Reaction.Primary reaction is lighted by ignition flame, fuel is preferably powdered fuel, particularly coal dust or combustion gas.It is preferred that
Ground both can be used powdered fuel that gas shape fuel can also be used in a combustion chamber, select powdered fuel or gas shape combustion
Material can be according to local market price, local harmful substance limit value, region feasibility or other factors.Work as in particular according to China
The seasonal variations of ground emission limit determine that emission limit can change according to the very big smog value of season difference.Preferably,
Primary combustion region is made of a cylinder-type burner hearth, and an end face of middle column body is connected at after-flame region, and is passed through
Primary air supply pipe, fuel feed pipe and secondary air supply pipe are connected to primary combustion region by the other end of cylinder
Place.Here, longitudinal axis is centrally throughout combustion chamber.If primary combustion region and/or after-flame region are cylinder shape region, the longitudinal axis
Line can form rotationally symmetric axis.Primary air supply pipe can be disposed concentrically upon cyclization around channel, drilling, nozzle or other
Form of implementation.
Correspondingly, primary air supply pipe can be located on the circular orbit on the end face of primary combustion region.It is fired in primary
Fuel feed pipe can be disposed on another circular orbit on the end face in region by burning, which surrounds primary sky
The circular orbit of gas supply pipe.Fuel feed pipe is also preferably concentric with primary combustion region and longitudinal axis.Secondary air supply
Pipe can be arranged in individual supply pipe, which may be similarly located on the circular orbit on primary combustion region end face,
Wherein the circular orbit of secondary air supply pipe can around fuel feed pipe circular orbit arrangement and preferably with primary combustion
Region, longitudinal axis and fuel feed pipe arranged concentric；Or can also be mixed in advance with fuel and supply together with fuel to
Primary combustion region, wherein preferably by transport air so that fuel is blown into combustion chamber especially in dusty fuel, and
Wherein secondary air can be transport air.
After-flame region is preferably again concentric with primary combustion region and is equally cylinder shape region, and diameter should be greater than
Primary combustion region diameter.After-flame region can also have other shapes.Since after-flame region is relative to primary combustion region axial direction
It arranges with being staggered, so third air supply pipe is arranged with axially offsetting also relative to other air supply pipes.Preferably, third
Grade air supply pipe is arranged on one or more circular orbits concentric with primary combustion region.
In a preferred embodiment, goal of the invention is realized by above-mentioned burning process, wherein in order to light fuel
Sustained combustion is supplied by igniter fuel that be arranged in primary combustion region, to be disposed with the endface of primary air supply pipe
Pipe supplies igniter fuel, and igniter fuel reacts to form ignition flame with primary air.
In this regard, being provided with igniter fuel supply pipe in the end face with primary air supply pipe of primary combustion region.
Igniter fuel supply pipe can be arranged in inside primary air supply pipe, in this regard, primary fuel supply pipe can be centrally positioned on end
On face.
Start the beginning of namely fuel sustained combustion process in burning process, igniter fuel passes through igniter fuel supply pipe
It supplies to primary combustion region.Igniter fuel produces ignition flame by reacting with primary air, and ignition flame lights fuel.
Fuel stable flame once being formed, in this way it is no longer necessary to igniter fuel.
In a preferred embodiment, pass through above-mentioned burning process and realize goal of the invention, wherein primary combustion region is
The processing step f) of one burner hearth, non-complete combustion of fuel occurs in the environment of partial insulation, which substantially only will be hot
It measures and is released towards the direction in after-flame region.
Primary combustion region is designed to that the advantages of burner hearth is to provide preferable thermal insulation.This actively stablizes primary combustion region
In flame and reduce heat loss.Therefore occurs the burning of partial insulation in primary combustion region.This means that in primary
Only have sub-fraction to leave primary combustion region by hearth wall in the heat stream that combustion zone is released when burning.Most of heat
Amount stream reaches after-flame region towards the open end face in after-flame region by burner hearth.Herein preferably, 70% or more heat stream is put
Out to after-flame region, further preferably reach 90% or more, still more preferably reaches 98% or 99% or more.
It is 15 to 30W/mK that burner hearth material, which preferably has thermal coefficient, and thickness is preferably 50 to 100 mm.This can make
It is highly uniform to obtain burner hearth interior temperature distribution, so that burner hearth internal difference in temperature is preferably more than 200K, is further preferably no more than
100K is still more preferably no more than 50K.
Another preferred embodiment of the invention is burning process as described above, wherein primary combustion region and/or
Flame temperature in after-flame region is adjusted to the ashes softening temperature lower than fuel but is higher than in the temperature of firing temperature.
If temperature is more than the ashes softening temperature of fuel, ashes can melt, then glue on the surface, be for example sticked to burner hearth
On surface and secondary consolidation again to can change the geometry of combustor surface structure and/or combustion chamber passes through secondary consolidation again
Ashes can also be such that passway or sensor blocks.This can generate negative interaction to combustion characteristics, or lead to the mistake of sensor
Measured value.
Preferably, the temperature in primary combustion region can be controlled by the eddy flow of secondary air and the air capacity of supply
System.
Another preferred embodiment of the invention is burning process as described above, wherein primary combustion region and/or
Flame temperature in after-flame region can be adjusted by exhaust gas reclrculation pipe.
In addition to the eddy flow and air capacity of secondary air, the flame temperature of primary combustion region can also be adjusted with other methods
Degree.
Inert gas content when another preferred method for adjusting flame temperature is exactly adjustment burning.In this regard, described
Gas recirculation system is set in embodiment, gas recirculation system by the combustion product of burning process by secondary air or
The individual supply pipe of person is supplied again to primary combustion region.Correspondingly, after-flame region is also provided with there is exhaust gas recirculation device.
Another preferred embodiment of the invention is burning process as described above, wherein primary air has 0.1
Swirling number (Drallzahl) between to 0.5.Eddy flow can generate different positive influences to burning, especially to air and combustion
The mixing of material and stability to flame.Thus in a preferred embodiment of the invention, primary air and/or secondary air
And/or third level air air inlet all in a manner of eddy flow.In a kind of particularly preferred embodiment, primary air has herein
Swirling number between 0.3 to 0.8.In a preferred embodiment, eddy flow can pass through swirl vane or tangential air
Pipe introduces.
A kind of preferred embodiment of the invention is burning process as described above, wherein use powdered fuel as
Fuel, wherein fuel feed pipe has turbulent flow protruding portion, and turbulent flow protruding portion makes sufficiently mixed between powdered fuel and transport air
It closes.
This technique is suitble to the different powdered fuel that burns, it is preferred that combusting coal fines.Other alternative solutions can also be with
It is powdered biomass, such as wood dust.
Uniform mixing between fuel and air is especially important, is easy to implement controlled burning.Turbulent flow in air stream
It can promote to be sufficiently mixed, to form uniform fuel air mixture.In this regard, it is prominent that turbulent flow is arranged in fuel feed pipe
Portion, turbulent flow protruding portion cause turbulent flow in the flowing of transport air and fuel.
According to the present invention, the multistage burner for being used to carry out above-mentioned burning process is used as above-mentioned multistage in above-mentioned technique
Burner, the multistage burner have combustion chamber, primary air supply pipe, fuel feed pipe, secondary air supply pipe and third
Grade air supply pipe, combustion chamber have primary combustion region and after-flame region, and wherein primary combustion region includes a cylinder shape
Burner hearth is connected with after-flame region in the open side of burner hearth, and wherein primary air supply pipe is concentrically arranged at primary combustion region
Place, wherein fuel feed pipe surrounds primary supply pipe and is arranged at primary combustion region, and wherein secondary air supply pipe is around combustion
Material supply pipe is arranged at primary combustion region, and wherein third level air supply pipe is arranged in around secondary air supply pipe
At after-flame region, the application of above-mentioned technique may be implemented using this multistage burner, especially burn in primary combustion region
When very oil mixture, as described above, and realizing third level air supply pipe appropriate in after-flame region.
A kind of preferred embodiment of the invention is multistage burner as described above, wherein third level air supply pipe cloth
It sets on the track substantially annular in shape of the one or more around secondary airflow, the diameter of middle orbit is primary combustion zone
At least 1.25 times of domain diameter are big.
It is very crucial that third level air is suitably supplied in after-flame region, to prevent after-flame region from generating a large amount of NOx。
In this embodiment, third level air supply pipe is supplied radially with the big spacing of the longitudinal axis relative to multistage burner
It gives.I.e. radially, third level air supply pipe relative to the big spacing of burner hearth or primary combustion region to arrange.In a kind of spy
In other preferred embodiment, third level air supply pipe is arranged in the circular orbit around burner hearth or primary combustion region
On.In this embodiment, the circular orbit diameter of third level air supply pipe is preferably furnace diameter or primary combustion region
At least 1.25 times of diameter are big, particularly preferably at least double big.
Third level air supply pipe can also be arranged on multiple circular orbits, wherein it is particularly preferred that the third level is empty
Gas supply pipe is arranged on two circular orbits.On the circular orbit that about 2/3 third level air can be passed through outside by this
The supply of third level air supply pipe, the third level air supply pipe on circular orbit that 1/3 third level air passes through the inside
Supply.
A kind of preferred embodiment of the invention is multistage burner as described above, wherein third level air supply pipe packet
Include multiple jet nozzles.In this embodiment, jet nozzle can be arranged in one or more annular orbits as described above
On.In a preferred embodiment, multistage burner has 8 to 15 jet nozzles.
A kind of preferred embodiment of the invention is multistage burner as described above, wherein primary air supply pipe
Whirlwind generator includes swirl vane or the tangential air pipe for making primary air generation tangential speed component.
A kind of preferred embodiment of the invention is multistage burner as described above, wherein secondary air supply pipe
Whirlwind generator includes swirl vane or the tangential air pipe for making secondary air generation tangential speed component.
In order to ensure flame front is stablized, in order to promote fuel and combustion air to be sufficiently mixed, and in order to control burning
The burning of room is spread, and the eddy flow of combustion air is an important measures.In order to realize primary air and secondary air with the side of eddy flow
Formula air inlet can arrange rotational flow air blade or tangential air in primary air supply pipe and/or secondary air supply pipe
Pipe.Preferably, rotational flow air blade or tangential air pipe are arranged in primary air supply pipe and/or secondary air supply pipe
At primary combustion region.
Herein preferably, the adjustment angle (Anstellwinkel) of the swirl vane of secondary air supply pipe be 30 to
40°.Preferably, secondary air enters the swirling number of primary combustion region less than 1.
A kind of preferred embodiment of the invention is multistage burner as described above, wherein secondary air is by assemble
Mode supply to primary combustion region, the convergence have herein 15 ° formed with the longitudinal axis of multistage burner to 45° angle.
Secondary air assembles the flame that the advantages of flowing into primary combustion region is further stable primary combustion region.Air is preferred herein
It is supplied with the longitudinal axis with primary combustion region or burner hearth at 15 to 45 ° of angle.Correspondingly, secondary air is towards among burner hearth
Direction flowing, that is, towards multistage burner axis direction flow.
Detailed description of the invention
Detailed description of the invention:
Fig. 1 is the cross-sectional view of the multistage burner of a preferred embodiment of the invention；
Fig. 2 is the cross-sectional view of the end face of primary combustion region, and end face includes air supply pipe and fuel feed pipe.
Specific embodiment
The embodiment for the multistage burner 1 that Fig. 1 is shown include: have by the primary combustion region 31 of surrounding hearth and
Combustion chamber 30, igniter fuel supply pipe 10, primary air supply pipe 20, secondary air supply pipe 21 with after-flame region 32,
Fuel feed pipe and third level air supply pipe 22, wherein igniter fuel supply pipe is centrally arranged, is located at burner hearth or primary combustion
The center of the end face in region 31 is burnt, wherein primary air supply pipe 20 is fired around igniter fuel supply pipe 10 and with igniting
Expect supply pipe 10 or burner hearth arranged concentric, wherein being disposed with supply tube opening around primary air supply pipe 20, supplies tube opening
Including secondary air supply pipe 21 and fuel feed pipe and with 10 arranged concentric of burner hearth or igniter fuel supply pipe, wherein supplying
The outer wall of tube opening shrinks its diameter towards burner hearth direction, so that outer wall has the convergence towards the direction among burner hearth, forces secondary
The air stream and fuel stream of air are assembled.Primary flame is generated by primary air and fuel reaction in primary combustion region 31
33, primary flame ignition is by secondary air and fuel composition, the mixture that burns in primary reaction.Mixtures of materials continues
It is flowing axially into the after-flame region 32 in downstream, since after-flame region 32 is greater than primary combustion region 31, material mixing radially
Object can be with radial expansion.Third level air is supplied by third level air supply pipe 22 in after-flame region 32, makes to stay in mixing
The reaction product of fuel and primary reaction in object can the reaction was continued with third level air in after-flame region.
Fig. 2 is the sketch of 31 end regions of primary combustion region of multistage burner, wherein igniter fuel supply pipe 10
It is around the primary air supply pipe 20 with swirl vane 41 in center, which makes primary air
Eddy flow is generated, wherein what is arranged around primary air supply pipe 20 is fuel feed pipe, fuel feed pipe has turbulent flow protrusion
Portion (Turbulenzvorspr ü nge) 43, turbulent flow protruding portion make by fuel feed pipe supply, by fuel and transport air group
At mixture generate turbulent flow, what is wherein arranged around fuel feed pipe is secondary air supply pipe 21, secondary air supply
Pipe 21 has gradient at its outer wall, so that secondary air flows into primary combustion region 31 with convergent angle 44.
Reference signs list
1 multistage burner
10 igniter fuel supply pipes
11 secondary fuel supply pipes
12 third level fuel feed pipes
20 primary air supply pipes
21 secondary air supply pipes
22 third level air supply pipes
30 combustion chambers
31 primary combustion regions
32 after-flame regions
33 primary flames
40 whirlwind generators
Swirl vane in 41 primary air supply pipes
43 turbulent flow protruding portions
44 convergence angles
A longitudinal axis.
Claims (13)
1. burning process is used for the sustained combustion fuel in the combustion chamber (30) with longitudinal axis (A), the combustion chamber includes
Primary combustion region (31) and the after-flame region for radially offsetting from relative to the primary combustion region (31) and being axially staggered
(32), the burning process has follow steps:
It a) will be first in a manner of eddy flow by the primary air supply pipe (20) with the primary combustion region (31) arranged concentric
Grade air is supplied in the primary combustion region (31)；
B) primary is supplied fuel to by the fuel feed pipe around primary air supply pipe (20) arranged concentric
In combustion zone (31)；
C) fuel and primary air burn to form primary flame (33)；
It d) will be secondary empty in a manner of eddy flow by the secondary air supply pipe (11) around the fuel feed pipe arranged concentric
Gas is supplied in the primary combustion region (31)；
E) fuel imperfect combustion in primary reaction in the primary combustion region (31)；
F) third level air stream is supplied in the after-flame region (32) by third level air supply pipe (22), the third
Grade air supply pipe is axially disposed in the downstream of the secondary air supply pipe (21) and supplies around the secondary air
Pipe arranged concentric；
G) the part reaction product from the primary reaction and the residual fuel burning in the after-flame region (32)；
Wherein, when air ratio is 0.1 to 0.9, fuel carries out imperfect combustion in the primary combustion region (31).
2. according to the method described in claim 1, wherein, in order to light the sustained combustion of fuel, by being arranged in the primary
Combustion zone (31), the supply igniting combustion of the igniter fuel supply pipe (10) that is disposed with the endface of primary air supply pipe (20)
Material, and the igniter fuel reacts to form ignition flame with the primary air.
3. method according to any of the preceding claims, which is characterized in that the primary combustion region (31) is one
The processing step e) of burner hearth, non-complete combustion of fuel occurs in the environment of partial insulation, and the environment is substantially only by heat court
The after-flame region (32) direction release.
4. method according to any of the preceding claims, wherein in the primary combustion region (31) and/or described
Flame temperature in after-flame region (32) is adjusted to the ashes softening temperature lower than fuel but is higher than in the temperature of firing temperature.
5. method according to any of the preceding claims, wherein adjust the primary combustion by exhaust gas reclrculation pipe
Burn the flame temperature in region (31) and/or in the after-flame region (32).
6. method according to any of the preceding claims, the primary air has the eddy flow between 0.1 to 0.5
Number.
7. method according to any of the preceding claims, wherein use powdered fuel as fuel, wherein described
Fuel feed pipe has turbulent flow protruding portion (43), and the turbulent flow protruding portion makes sufficiently mixed between powdered fuel and transport air
It closes.
8. multistage burner (1) is used to implement burning process according to any one of the preceding claims, the multistage
Burner combuster, the combustion chamber have primary combustion region (31) and after-flame region (32), igniter fuel supply pipe
(10), primary air supply pipe (20), fuel feed pipe, secondary air supply pipe (21) and third level air supply pipe (22),
Wherein, the primary combustion region (31) includes cylinder shape burner hearth, is connected with after-flame region (32) in the open side of the burner hearth,
Wherein in the opposed endface of the primary combustion region (31), the igniter fuel supply pipe (10) is centrally arranged, wherein
The primary air supply pipe (20) is concentrically arranged at the primary combustion region (31) around the longitudinal axis (A),
Described in fuel feed pipe be arranged at the primary combustion region (31) around the primary air supply pipe (20), wherein institute
It states secondary air supply pipe (21) to be arranged at the primary combustion region (31) around the fuel feed pipe, and wherein institute
Third level air supply pipe (22) are stated to be arranged at the after-flame region (32) around the secondary air supply pipe (21).
9. multistage burner (1) according to claim 8, wherein the third level air supply pipe (22) is arranged in and surrounds
On the one or more of secondary airflow track substantially annular in shape, wherein the diameter of the track is at least the primary combustion
1.25 times for burning region (31) diameter are big.
10. multistage burner (1) according to claim 8 or claim 9, wherein the third level air supply pipe (22) includes more
A jet nozzle.
11. the multistage burner according to any one of claim 8 to 10 (1), wherein the primary air supply pipe
Whirlwind generator (40) includes swirl vane (41) or the tangential air for making the primary air generation tangential speed component
Pipe.
12. the multistage burner according to any one of claim 8 to 11 (1), wherein the secondary air supply pipe
Whirlwind generator (40) includes swirl vane or the tangential air pipe for making the secondary air generation tangential speed component.
13. the multistage burner according to any one of claim 8 to 12 (1), wherein the secondary air is by assemble
Mode supply to the primary combustion region (31), which has linear with the longitudinal axis of the multistage burner (1) herein
At 15 ° to 45° angle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017005917.9 | 2017-06-23 | ||
| DE102017005917.9A DE102017005917A1 (en) | 2017-06-23 | 2017-06-23 | Combustion process and multi-stage burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109114545A true CN109114545A (en) | 2019-01-01 |
Family
ID=64567836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810650500.8A Pending CN109114545A (en) | 2017-06-23 | 2018-06-22 | Burning process and multistage burner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109114545A (en) |
| DE (1) | DE102017005917A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720839A (en) * | 2020-06-12 | 2020-09-29 | 山东同智创新能源科技股份有限公司 | Environment-friendly multi-stage combustion device applied to waste gas liquid incineration treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3048201A1 (en) * | 1980-12-20 | 1982-07-08 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Burner for nitrogen-bearing fuels, with coaxial primary air ducts - has furnace gas recirculating ducts to these ducts, pref. entering at restriction |
| CN1055230A (en) * | 1991-01-16 | 1991-10-09 | 哈尔滨普华煤燃烧技术开发中心 | Burner for various kinds of coal |
| CN1226654A (en) * | 1998-01-30 | 1999-08-25 | 株式会社日立制作所 | Pulverized coal combustion burner and combustion method thereby |
| JP2006052917A (en) * | 2004-08-16 | 2006-02-23 | Mitsubishi Heavy Ind Ltd | Pulverized coal burner and boiler |
| CN103256590A (en) * | 2013-05-20 | 2013-08-21 | 北京科技大学 | Method and device for multi-grade mixed combustion of double fuels at cyclone state |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202007019416U1 (en) * | 2007-06-28 | 2012-06-11 | Hitachi Power Europe Gmbh | For firing fuel supplied in dense phase conveying suitable coal dust burner |
-
2017
- 2017-06-23 DE DE102017005917.9A patent/DE102017005917A1/en not_active Withdrawn
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2018
- 2018-06-22 CN CN201810650500.8A patent/CN109114545A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3048201A1 (en) * | 1980-12-20 | 1982-07-08 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Burner for nitrogen-bearing fuels, with coaxial primary air ducts - has furnace gas recirculating ducts to these ducts, pref. entering at restriction |
| CN1055230A (en) * | 1991-01-16 | 1991-10-09 | 哈尔滨普华煤燃烧技术开发中心 | Burner for various kinds of coal |
| CN1226654A (en) * | 1998-01-30 | 1999-08-25 | 株式会社日立制作所 | Pulverized coal combustion burner and combustion method thereby |
| JP2006052917A (en) * | 2004-08-16 | 2006-02-23 | Mitsubishi Heavy Ind Ltd | Pulverized coal burner and boiler |
| CN103256590A (en) * | 2013-05-20 | 2013-08-21 | 北京科技大学 | Method and device for multi-grade mixed combustion of double fuels at cyclone state |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720839A (en) * | 2020-06-12 | 2020-09-29 | 山东同智创新能源科技股份有限公司 | Environment-friendly multi-stage combustion device applied to waste gas liquid incineration treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017005917A1 (en) | 2018-12-27 |
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