CN104100970B - Oxy-solid Fuel Burner - Google Patents
Oxy-solid Fuel Burner Download PDFInfo
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- CN104100970B CN104100970B CN201410147431.0A CN201410147431A CN104100970B CN 104100970 B CN104100970 B CN 104100970B CN 201410147431 A CN201410147431 A CN 201410147431A CN 104100970 B CN104100970 B CN 104100970B
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Abstract
The invention relates to an oxy-solid fuel burner. A solid fuel/oxygen burner includes a central oxygen conduit extending toward a tip end of the burner, an outer fuel conduit surrounding the oxygen conduit, an inner fuel conduit positioned between the oxygen conduit and the outer fuel conduit to form an inner annulus in conjunction with the oxygen conduit and an outer annulus in conjunction with the outer fuel conduit,the inner fuel conduit having an outlet end upstream of the tip end, a truncated conical divider within the outer fuel conduit surrounding the oxygen conduit downstream of the inner fuel conduit for dividing a fuel stream in the outer fuel conduit into an inner annular conical diffuser and an outer annular converging nozzle, and at least three radial guide vanes within the diffuser, wherein the outlet end of the inner fuel conduit is spaced apart from an inlet end of the divider by a distance X.
Description
With Cross-Reference to Related Applications
This application claims the priority of the U.S. Provisional Application No. 61/811,175 of the submission of on April 12nd, 2013, the Shen
Please it is integrally incorporated herein by reference.
Technical field
The application is related to the burner for buring solid fuel and oxygen.
Background technology
Partially due to the volatile substances content of solid fuel is variable, so solid fuel is difficult in flowing
The fuel lighted in stream.Therefore, typically, solid fuel can experience significant ignition delay, this can cause substantially with fuel spray
The separate flame front of mouth.This is inherently unstable situation, and this situation can cause high-caliber unburned carbon contained, unstable
Process heated condition (heat transfer, fusing etc.), and fray-out of flame may be caused, this can cause very fast and uneasiness of burning
Degenerate entirely.
It is desirable with a kind of burner of the solid fuel flame that can be formed and be attached on burner end.
This is the inherently desirable situation for farthest improving heat transfer, carbon after-flame and flame holding.
The content of the invention
A kind of burner is described herein, it has what is surrounded by external fuel (powdered solid fuel/transport gas) pipeline
Central oxygen pipeline.External fuel pipeline can be surrounded by external oxygen pipeline again.Internal fuel pipe includes upstream zone, wherein, it is interior
Portion's annular channel terminates before the end of burner, and be discharged to suddenly between external fuel pipeline and central oxygen pipeline compared with
In big intermediate annular section.Centre portion is followed by downstream circular segments, and downstream circular segments are included in flattened conical shape point
The inner annular diffuser and outer annular nozzle (diffuser/Nozzle combination) of the either side of stream device.Towards diffuser/nozzle
The inlet port of combination and the outlet of inner annular runner X separated by a distance, this can affect to enter the diffuser/Nozzle combination
Flow distribution.0 is have to be larger than apart from X.Diffuser has the multiple radial vanes around its periphery distribution, to control in diffuser
Flow separation.
The diverging of diffuser can in a controlled manner reduce the speed of the Part I of solid fuel flow, and not produce bright
Aobvious flow separation.The Part II of solid fuel is flowed in the nozzle ring assembled with higher speed.Flow near each other
The combination of dynamic fair speed stream and low velocity stream can produce larger stream recirculation pattern, and this aids in fuel nozzle end substantially
Stable burning is maintained at end.
Diffuser may also include and be positioned at the upstream of radial vane blunt form body (static mixing device) nearby.
Central oxygen can flow through central oxygen pipeline, and external oxygen then can flow through external oxygen pipeline.Have passed through external fuel pipe
The solid fuel in road/transport gas stream is discharged from diffuser/Nozzle combination, diffuser/Nozzle combination have be characterized as it is low interior
The VELOCITY DISTRIBUTION of portion's speed (producing in diffuser) and high external speed (producing in annular convergent nozzle).Oxygen, fuel
The stable solid fuel flame with nominal circular cross section can be produced with the combination for transporting gas.
The each side of system disclosed herein can be used alone, or use with being bonded to each other.
Aspect 1：A kind of solid fuel/oxygen burner, it includes：Extend to the central oxygen pipeline of the end of burner；Outward
Portion's fuel channel, it surrounds oxygen pipeline, and extends to the end of burner；Internal fuel pipe, its be positioned at oxygen pipeline and
Between external fuel pipeline, to form interior annulus, and fuel channel internally between oxygen pipeline and internal fuel pipe
Outer annulus are formed and external fuel pipeline between, internal fuel pipe has the port of export in the end upstream of burner；It is flat
Top conical diverter, it is positioned in external fuel pipeline, and internally fuel channel downstream surrounds oxygen pipeline, current divider
It is configured to the The fuel stream in external fuel pipeline is diverted in inner annular conic type diffuser and outer annular convergent nozzle；
And at least three radial vanes being positioned in diffuser；Wherein, the entrance of the port of export of internal fuel pipe and current divider
Hold X spaced apart.
Aspect 2：According to the burner of aspect 1, wherein, the port of export of interior annulus has height h1；Wherein, annular cones
The arrival end of shape diffuser has height h2；And wherein, h1 is more than h2.
Aspect 3：According to the burner of aspect 1 or 2, further include：The blunt form body being positioned in diffuser, it is non-
Shaped body has leading edge and the rear end near the upstream end of radial vane.
Aspect 4：According to the burner of aspect 3, wherein, blunt form body has the height h3 perpendicular to flow direction, from oxygen
Duct survey height h3；Wherein, at the vertical plane overlapped with the leading edge of blunt form body, inner annular cone diffusion
The height of device has height h4；And wherein, the ratio of h3/h4 is of about 0.2 to about 0.5.
Aspect 5：According to the burner of aspect 4, wherein, radial vane has the rear end from blunt form body to diffuser
Axial length L out；And wherein, the ratio of Lout/h3 is of about 3 to about 25.
Aspect 6：According to the burner of aspect 5, wherein, the ratio of Lout/h3 is of about 5 to about 15.
Aspect 7：The burner of the either side in aspect 3 to 6, wherein, blunt form body is located so that non-
The front end of shaped body reaches distance Lin from the arrival end of diffuser；Wherein, diffuser has entrance flow area A2, Yi Ji
The upstream of blunt form body flow area A3 nearby；And wherein, by the standardization of the ratio of A3/A2 and blunt form body
Relation between the Lin/h2 of position is set to and is essentially prevented from having flow separation in diffuser.
Aspect 8：The burner of the either side in aspect 1 to 7, wherein, current divider is substantially parallel including being oriented
In the leading edge of external fuel pipeline.
Aspect 9：The burner of the either side in aspect 1 to 8, further includes：External oxygen pipeline, it surrounds outer
Portion's fuel channel, and extend to the end of burner.
Aspect 10：According to the burner of aspect 9, further include：Two grades of (secondary) oxygen pipelines, itself and external oxygen
Pipeline is spaced apart, and extends to the end of burner.
Aspect 11：The burner of the either side in aspect 1 to 8, further includes：Form three-level (tertiary)
The outer annulus of oxygen pipeline.
Aspect 12：According to the burner of aspect 11, further include：Two grades of oxygen pipelines, its with external fuel pipeline enclosure every
Open, and extend to the end of burner.
Aspect 13：A kind of method of burning pulverized solid fuels and oxygen, the method includes：Flow through central oxygen stream to extend to
The central tube of the end of burner, central oxygen pipeline is extended the external fuel pipeline of the end to burner and surrounds；Make
The The fuel stream for transporting the dusty fuel in gas flows through interior annulus, and interior annulus are formed by internal fuel pipe, inner fuel
Pipeline location is between oxygen pipeline and external fuel pipeline；The fuel stream is set internally to leave inner loop at the port of export of fuel channel
Band, the port of export of internal fuel pipe is positioned at the end upstream of burner；The fuel stream is set to be divided into two streams, two streams include：
Inner annular conic type diffuser stream, it is formed by flattened conical shape current divider, and flattened conical shape current divider is with being positioned at
The arrival end at X in the port of export downstream of portion's fuel channel, outer annular convergent nozzle stream is formed at current divider and outside
Between fuel channel, wherein, internal diffuser stream slows down, and external nozzles stream accelerates；And internal diffuser stream is flowed through calmly
At least three radial vanes of the position in current divider.
Aspect 14：According to the method for aspect 13, wherein, the port of export of interior annulus has height h1；Wherein, annular cones
The arrival end of shape diffuser has height h2；And wherein, h1 is more than h2.
Aspect 15：According to the method for aspect 13 or 14, further include：Internal diffuser stream is set to flow through blunt form sheet
Body, blunt form body is located so that the rear end of blunt form body near the upstream end of radial vane.
Aspect 16：According to the method for aspect 15, wherein, blunt form body has the height h3 perpendicular to flow direction, from oxygen
Duct survey height h3.
Aspect 17：According to the method for aspect 16, wherein, radial vane has the rear end from blunt form body to diffuser
Axial length L out；And wherein, the ratio of Lout/h3 is of about 3 to about 25.
Aspect 18：According to the method for aspect 17, wherein, the ratio of Lout/h3 is of about 5 to about 15.
Aspect 19：The method of the either side in aspect 14 to 17, wherein, blunt form body is located so that non-
The front end of shaped body reaches distance Lin from the arrival end of diffuser；Wherein, diffuser has entrance flow area A2, Yi Ji
The upstream of blunt form body flow area A3 nearby；And wherein, by the standardization of the ratio of A3/A2 and blunt form body
Relation between the Lin/h2 of position is set to and is essentially prevented from having flow separation in diffuser.
Aspect 20：The method of the either side in aspect 13 to 19, wherein, current divider is substantially parallel including being oriented
In the leading edge of external fuel pipeline.
Aspect 21：The method of the either side in aspect 13 to 20, further includes：Internal oxygen stream is set to flow through ring
Shape oxygen passage, annular oxygen passage is limited by external oxygen pipeline, and external oxygen pipeline surrounds external fuel pipeline, and extends to spray combustion
The end of device.
Aspect 22：According to the method for aspect 21, further include：Two grades of oxygen streams are made to flow through two grades of oxygen pipelines, two grades of oxygen pipes
Road is spaced apart with external oxygen pipeline, and extends to the end of burner.
Aspect 23：The method of the either side in aspect 13 to 20, further includes：Three-level oxygen stream is set to flow through inside
Outer annulus between fuel channel and external fuel pipeline.
Aspect 24：According to the method for aspect 23, further include：Two grades of oxygen streams are made to flow through two grades of oxygen pipelines, two grades of oxygen pipes
Road is spaced apart with external fuel pipeline, and extends to the end of burner.
Aspect 25：The method of the either side in aspect 13 to 24, further includes：Central oxygen stream is made with less than big
The speed flowing of about 20 to about 30 feet per seconds.
Aspect 26：The method of the either side in aspect 13 to 24, further includes：Central oxygen stream is made with more than big
The speed flowing of about 20 to about 30 feet per seconds.
Aspect 27：A kind of reproducibility stove, it includes：Burner block, it has at least one of the side wall installed in stove
Burning port；And one or more solid fuels/oxygen burner, it is positioned at the adjacent edges of at least one burning port,
Burner includes：Extend to the central oxygen pipeline of the end of burner；External fuel pipeline, it surrounds oxygen pipeline, and extends
To the end of burner；Internal fuel pipe, it is positioned between oxygen pipeline and external fuel pipeline, with oxygen pipeline and outside
Interior annulus are formed between fuel channel, and internally forms outer annulus between fuel channel and external fuel pipeline, it is interior
Portion's fuel channel, it has the port of export in the end upstream of burner；Flattened conical shape current divider, it is positioned at external fuel
In pipeline, and internally fuel channel downstream surrounds oxygen pipeline, and diverter configuration is into the The fuel stream made in external fuel pipeline
In being diverted to inner annular conic type diffuser and outer annular convergent nozzle；And at least three footpaths being positioned in diffuser
To stator；Wherein, the port of export of internal fuel pipe and the arrival end of current divider X spaced apart；Wherein, in lower port cloth
In putting, one or more burners are positioned at below at least one burning port in lower port arrangement；And wherein, in side
In portion's port arrangements, sidepiece positioning of one or more burners along at least one burning port.
Aspect 28：According to the stove of aspect 27, wherein, one or more burners are positioned at the adjacent edges of port and at end
The outside of mouth.
Aspect 29：According to the stove of aspect 27, wherein, one or more burners are positioned at the adjacent edges of port and at end
In mouthful.
Aspect 30：A kind of method of burning pulverized solid fuels in reproducibility stove and oxygen, the method includes：Make hot burning
Air flows through regenerator burning port；Offer is positioned at the solid fuel/oxygen burner of the adjacent edges of burning port；Make center
Oxygen stream flows through the central tube of the end for extending to burner, and central oxygen pipeline is extended the external fuel of the end to burner
Pipeline is surrounded；The The fuel stream dusty fuel stream in gas is transported is set to flow through interior annulus, interior annulus are by being positioned at oxygen pipeline
And the internal fuel pipe between external fuel pipeline is formed；The fuel stream is set internally to leave inside at the port of export of fuel channel
Annulus, the port of export of internal fuel pipe is positioned at the end upstream of burner；The fuel stream is set to be divided into two streams, this two stream bags
Include：Inner annular conic type diffuser stream, it is formed by flattened conical shape current divider, flattened conical shape current divider have be positioned at
The arrival end at X in the port of export downstream of internal fuel pipe, and inner annular convergent nozzle stream is formed at current divider
And external fuel pipeline between, wherein, internal diffuser stream slows down, and external nozzles stream accelerates；And make internal diffuser stream
Flow through at least three radial vanes being positioned in current divider.
Aspect 31：According to the method for aspect 30, further include to make three-level oxygen stream flow through external fuel pipeline.
Aspect 32：According to the method for aspect 30, further include to make external oxygen stream flow through external oxygen annulus.
Aspect 33：The method of the either side in aspect 30 to 32, wherein, from the fuel and oxygen stream of burner discharge
Mix with air when adjacent regenerator burning port is left in air.
Aspect 34：According to the method for aspect 33, wherein, burner is with less than the operation of stoichiometric oxygen amount, stoichiometry
Than being of about 0.05 to about 0.5.
Description of the drawings
Fig. 1 is the schematic side elevational cross-sectional view of exemplary solid fuel/oxygen burner, wherein, central oxygen pipeline is outer
Portion's fuel channel is surrounded, and the internal fuel pipe for surrounding central oxygen pipeline is discharged to internal fuel pipe in the end upstream of burner
In, and leave the fuel of internal fuel pipe device point is internally split between circular diffuser and outer annular convergent nozzle
Stream, current divider is positioned in external fuel pipeline, and the arrival end opened with the outlet end with internal fuel pipe.Footpath
It is positioned in diffuser to stator, and at the point in diffusor entry downstream.
Fig. 2 is that when central oxygen flow velocity degree leaves the speed of diffuser less than The fuel stream, the flow pattern of the burner of Fig. 1 is shown
It is intended to.
Fig. 3 is that when central oxygen flow velocity degree leaves the speed of diffuser more than The fuel stream, the flow pattern of the burner of Fig. 1 is shown
It is intended to.
Fig. 4 is the schematic side elevational cross-sectional view of the embodiment of burner as in figure 1, wherein, current divider includes
Straight parallel leading edge.
Fig. 5 is the schematic side elevational cross-sectional view of the embodiment of burner as in figure 4, wherein, burner enters one
Step is included at the upstream end of stator the blunt form body being positioned in diffuser.
Fig. 6 is the schematic diagram of the flow pattern in the diffuser of Fig. 5.
Fig. 7 be indicate diffuser as in fig. 5 to prevent to flow showing for geometrical relationship detached with diffuser wall
Meaning property figure is described.
Fig. 8 is the alternative shape and form for the blunt form body used in burner as in fig. 5
It is a series of to schematically show.
Fig. 9 is the schematic side of the embodiment for further including outer annular oxygen pipeline of burner as in figure 4
Depending on cross-sectional view.
Figure 10 is the schematic side elevational cross-sectional view of the embodiment of burner as in figure 4, wherein, including three-level oxygen
Flow in outer annulus between portion's fuel channel and external fuel pipeline.
Figure 11 is two grades of oxygen pipes for further including to be spaced apart with outer annular oxygen pipeline of burner as in fig. 9
The schematic side elevational cross-sectional view of the embodiment in road.
Figure 12 is further include to be spaced apart with external fuel pipeline two grades of oxygen pipes of the burner as in Figure 10
The schematic side elevational cross-sectional view of the embodiment in road.
Figure 13 is the schematic end of reproducibility glass furnace burning port, wherein, such as it is described herein any
Multiple burners of embodiment are arranged in lower port.Wherein, burner is positioned at below regenerator burning port.From furnace chamber
See to furnace sidewall and obtain end-view.
Figure 14 is the schematic end of reproducibility glass furnace burning port, wherein, such as it is described herein any
Multiple burners of embodiment are arranged in side port.Wherein, one or both of the burner along regenerator burning port
Sidepiece is positioned.End-view is obtained from terms of furnace chamber to furnace sidewall.
Figure 15 is the reality of the combustion air conduit for further including to surround external oxygen pipeline of burner as in fig. 9
Apply the schematic side elevational cross-sectional view of example.
Figure 16 is the combustion air conduit for further including encirclement external fuel pipeline of the burner as in Figure 10
Embodiment schematic side elevational cross-sectional view.
Figure 17 is the schematic plan view that one or more burners described herein may be installed reproducibility stove therein.
Specific embodiment
In order to describe herein, there is provided defined below.It is the gaseous state for transmitting or transporting solid fuel particulate to transport gas
Fluid, and may include air, oxygen-enriched air, nitrogen, carbon dioxide, recovery flue gas and combinations thereof.Oxygen is comprising concentration
More than or equal to 28 moles of %O2, preferably greater than or equal to 60 moles %O2, and more preferably equal to or greater than 85 moles %O2
Oxygen molecule gas.Solid fuel is the hydrocarbon fuel in solid form, and may include petroleum coke；Various coals,
It includes anthracite, bituminous coal, subbituminous coal and brown coal；Mud coal, wood, grass, and other so-called biological quality materials；City is consolidated
Body waste material；And combinations thereof.
Several embodiments and modification of oxygen/powdered solid fuel burner are being described herein.Figure 1 illustrates burner
One embodiment.Central oxygen pipeline is surrounded by external fuel pipeline, and both oxygen pipeline and external fuel pipeline extend to spray combustion
The end of device.The diameter internal fuel pipe less than external fuel pipeline is positioned between oxygen pipeline and external fuel pipeline,
And terminate at the position of the end upstream of burner.Flattened conical shape current divider is positioned in external fuel pipeline, and
Oxygen pipeline is internally surrounded at the position in the downstream of fuel channel.Current divider may extend into the end of burner, or can be in spray
The end upstream of burner terminates.In certain embodiments, the one or both in oxygen pipeline and external fuel pipeline extends to spray
The end of burner.
Powdered solid fuel and transport gas are downstream through internal fuel pipe, and central oxygen then flows through central oxygen pipe
Road.Outlet (afterwards) edge of internal fuel pipe has annular opening, and annular opening is h1 from the height of oxygen pipeline.Inner fuel
The outlet of pipeline in axial direction separates length X with current divider.Entrance (upstream) edge of current divider has ring of the height for h2
Shape opening, wherein, h2 is less than h1.Current divider produces two with circulation section：Annular expansion between oxygen pipeline and current divider
Scattered device, its stream cross-sectional area is along flow direction increase；And annular convergent nozzle, its be located at current divider and external fuel pipeline it
Between, its cross-sectional area reduces along flow direction.
In one embodiment, at least three radial guidings that circular diffuser separates comprising the periphery around diffuser channel
Leaf.Stator provides controlled to the stream sent from the turning being formed at each stator and the cross-shaped portion on the surface of central oxygen pipeline
Separation.In check separation at interior corners promotes stream to be attached in the outer surface of diffuser again, so as to relative to not having
The circular diffuser of radial vane, improves diffuser stability.Radial vane need not extend the whole axial length of diffuser.Example
Such as, as shown in Figure 1 like that, radial vane starts in the arrival end downstream of diffuser.
Fuel and transport gas stream and leave internal fuel pipe, and when current divider is flowed to axially downstream radially
Spread.Based on fuel and the relative amplitude of the speed, the amplitude apart from X and annular opening h1 and h2 of transporting gas stream, The fuel stream
Certain be partially into diffuser, and remainder then enters convergent nozzle.Flowing through the part of diffuser can experience axial velocity
Reduce, and the part for flowing through nozzle can then experience axial velocity increase.The low speed sections in the exit of diffuser are steady for realizing
It is important for fixed, attached flame region, and the highspeed portion in the exit of nozzle is then helped in low-speed region and high velocity
Large-scale annular flow direction (streamwise) vortex is produced between domain, so as to improve mixing therein, while also making from week
The hot combustion product recirculation for enclosing, so as to contribute to lighting fuel.
Two different stream modes can be associated with the burner of Fig. 1 construction.First, if central oxygen stream is with relatively low speed
Degree flowing, for example, less than about 20-30 feet per seconds, then after leaving from central oxygen pipeline, in burner downstream nearby
Flow pattern be qualitatively to illustrate in Fig. 2.That is, velocity wake region is formed along burner axis, because in burner
Amount aroused in interest is weak, and outside momentum is strong.Again, if the speed of central oxygen stream is higher, for example, more than about 20-30 feet per seconds,
Then the momentum of central oxygen jet prevents to a great extent axial velocity wake region from being formed, but produces the The fuel stream towards axis,
And the Mass flow pattern in burner downstream nearby is qualitatively shown in figure 3.
The related embodiment shown in Fig. 4 is included in leading edge on current divider, and leading edge is straight and is basically parallel to burner
Axis.The purpose of straight and parallel leading edge is by reducing into the angle of attack between the diffuser wall for becoming a mandarin and dissipating, coming most
Big degree ground reduces the flow disturbance in the porch of diffuser.
Another embodiment of burner is included in diffuser the blunt form being positioned near the leading edge of radial vane
Body, for example as depicted in Figure 5 as.The function of blunt form body is the stream that " resistance is stumbled (trip) " enters diffuser,
So as to be conducive to stream to be relatively reliable attached on outer diffuser wall (that is, current divider) in downstream, while strong mixing is produced, by force
Strong mixing is used for the high speed peak value being lowered from the flow field of diffuser.Blunt form body has the height perpendicular to flow direction
H3, and radial vane is with from the trailing edge of blunt form body to length Lout of diffuser exit.
Qualitative explanation of the blunt form body to the effect of diffuser stream is shown in figure 6.Note, in blunt form body
Downstream, in central oxygen Near Pipelines localization countercurrent zone is formed.In order to limit solid particle due to adverse current in diffuser channel
The degree of interior deposit, still provides and be enough to adjust the mixing length of amount of flow, diffuser section from after blunt form body
Edge should be of about 3 to arrive to the non-dimensional length Lout/h3 (that is, being standardized by blunt form body height) of diffuser exit
About 25, and preferably approximately 5 to about 15.
Another factor of arrangement blunt form body is the spreader cross-section in blunt form body upstream nearby
The ratio (such as the A3/A2 represented in Fig. 7) of the cross-sectional area at area and diffusor entry and from the entrance of diffuser to non-
Pass between the dimensionless entrance length Lin/h2 (that is, being standardized by the open height of diffuser) of the leading edge of shaped body
System.
It is known for fixed angles circular diffuser, the diffuser length of increase most causes at last flow separation (also referred to as to lose
Fast (stall)), this can produce stream unstability, and upset the VELOCITY DISTRIBUTION in diffuser.Towards the entrance of radial vane
The stream unstability at place and the VELOCITY DISTRIBUTION for upsetting will cause nonstandard performance to the diffuser section in blunt form body downstream.
Therefore, in order that burner realizes optimum operation, can be kept by making non-dimensional length Lin/h2 (changing than A3/A2 with area)
The curve in a region under for showing in the figure 7 is avoiding upstream stall.
Contemplate in addition to the representative disk of Fig. 5, similarly effective blunt form body can take other forms and
Shape.These alternative shapes include but is not limited to shaped form and the triangle described in Fig. 8.No matter the shape of blunt form body
How is shape, and its height h3 should flow to the half of thickness W more than it on paper.
In another embodiment of current burner, external oxygen annulus is positioned around leaving the The fuel stream of burner
Outer peripheral edge introduce external oxygen stream, as shown in Figure 9 like that.Mixing external oxygen and The fuel stream are conducive to the quick point of The fuel stream
Combustion, and improve Fire Radiation heat transfer.From in terms of operation angle, can be in the case where central oxygen be with or without using outside
Oxygen.In the case of the latter, the end of central oxygen passage can be blocked, to prevent partially combusted fuel and hot partial combustion products
Into.
Another embodiment of current burner eliminates external oxygen annulus, but three-level oxygen is incorporated into into external fuel pipeline
In annulus and internal fuel pipe between, as shown in Figure 10 like that.As external oxygen, three-level oxygen is to lighting and heat biography
Pass with similar effect, but realize in the less device of diameter.
Another embodiment of current burner combines " classification " oxygen stream, and " classification " oxygen stream is introduced in burner sheet
Near body and below, as described in Figure 11 and 12.Figure 11 is implemented corresponding to the burner with external oxygen (Fig. 9)
Example, and Figure 12 is then corresponding to the burner embodiment with three-level oxygen (Figure 10).The major advantage of so-called classification oxygen is it
The means of the control length of flame and burner NOx emission are provided.Especially, by the way that spray will be incorporated into less than stoichiometric oxygen amount
The main body of burner, and remaining is incorporated into into classification oxygen port, increase can the length of flame, and reduce NOx.Work as generation
When burning is degenerated (for example, flame becomes unstable, and CO discharges and unburned carbon increase), or relative to process stove size,
When flame becomes oversize, the actual upper limit of the classification oxygen amount of certain percentage as stoichiometric number is reached.Must be according to tool
Body situation is determining this limit.
In another construction, burner can be burned air encirclement.After this manner, burner can be to air-oxy-fuel burner
There is provided and strengthen.For example, Figure 15 and 16 illustrates that the burner embodiment as in Fig. 9 and 10 has extra extraneous air ring
Band.Also air can be introduced around burner in the conduit of arbitrary cross section.
Burner described herein can in systems be used as the device for heating and/or melt operation.Especially, spray combustion
Device can be used in reproducibility glass furnace, such as shown in Figure 17.In known reproducibility stove, with one
The burner block of individual or multiple burning ports is positioned on the relative sidepiece of stove combustion chamber or end.Each burning port typical case
Ground is included for delivering fuel into one or more burners in combustion chamber.Burning port is also about burner and provides burning
Air supply.Burner on stove run duration, the relative sidepiece of combustion chamber alternate run in a looping fashion.In combustion chamber
Side on burner when lighting, the combustion product of heat leaves the relative sidepiece of combustion chamber.Regeneration on the either side of stove
Device or resistance to thermal detector provide heat transmission medium, heat is delivered to from the hot burning gases for leaving combustion chamber and is transported to stove
Cold combustion air.Combustion air and exhaust stream are reversed typically per 20 minutes so that each side detector is all alternately
It is heated, and for pre-heated combustion air.Figure 17 shows reproducibility stove 10, and it is detected on the opposite side with regenerator
Device 12.Lighting period in burner 22, combustion air is transported to stove 10 by burning port 20 from regenerator detector 12
In combustion chamber 16.
Presently disclosed burner there is many ways in which and may be configured to be run in reproducibility glass furnace.Particularly practical
One construction is and hot combustion air cooperation.Figure 13 and 14 for example illustrates exemplary embodiment, wherein, one or more burners
Near hot combustion air port (that is, port of burning) in reproducibility glass furnace, wherein, nearby represent spray combustion
Device can be in the adjacent edges of port and outside it, or near end and in port.In these embodiments, solid combustion
Material is ejected in stream of hot air when stream of hot air is discharged from burning port.Figure 13 illustrates exemplary lower port burning cloth
Put, and Figure 14 then illustrates exemplary side port burning arrangement.In these embodiments, burner can be less than stoichiometric
Oxygen runs, used as the means for strengthening solid fuel and the burning of the combustion air from regenerator port hot.For example, burner can
Run with the stoichiometric proportion between about 0.05 and about between 0.5.
The present invention is not limited by the specific aspect or embodiment disclosed in example in scope, and example is intended to illustrate of the invention
Several respects, and the equal any embodiment of function is within the scope of the invention.Except those described and shown herein it
Outward, various modifications of the invention will become clear to those skilled in the art, and be intended to fall in claims
In the range of.
Claims (16)
1. a kind of solid fuel/oxygen burner, including：
Extend to the central oxygen pipeline of the end of the burner；
External fuel pipeline, it surrounds the oxygen pipeline, and extends to the end of the burner；
Internal fuel pipe, it is positioned between the oxygen pipeline and the external fuel pipeline, with the oxygen pipeline and institute
State and formed between internal fuel pipe interior annulus, and the shape between the internal fuel pipe and the external fuel pipeline
Into outer annulus, the internal fuel pipe has the port of export in the end upstream of the burner；
Flattened conical shape current divider, it is positioned in the external fuel pipeline, and in internal fuel pipe downstream bag
The oxygen pipeline is enclosed, the diverter configuration is diverted to inner annular cone into the The fuel stream made in the external fuel pipeline
In diffuser and outer annular convergent nozzle；And
At least three radial vanes being positioned in the diffuser；
Wherein, the port of export of internal fuel pipe X spaced apart with the arrival end of the current divider.
2. burner according to claim 1, it is characterised in that
Wherein, the port of export of the interior annulus has height h1；
Wherein, the arrival end of the annular cones shape diffuser has height h2；And
Wherein, h1 is more than h2.
3. burner according to claim 1 and 2, it is characterised in that further include：
The blunt form body being positioned in the diffuser, the blunt form body has leading edge and in the radial vane
Upstream end near rear end.
4. burner according to claim 1 and 2, it is characterised in that
The current divider includes being oriented to be parallel with the leading edge of the external fuel pipeline.
5. burner according to claim 1 and 2, it is characterised in that further include：
External oxygen pipeline, it surrounds the external fuel pipeline, and extends to the end of the burner.
6. burner according to claim 1 and 2, it is characterised in that further include：
Form the outer annulus of three-level oxygen pipeline.
7. burner according to claim 5, it is characterised in that further include
Two grades of oxygen pipelines, it is spaced apart with the external fuel pipeline, and extends to the end of the burner.
8. burner according to claim 6, it is characterised in that further include
Two grades of oxygen pipelines, it is spaced apart with the external fuel pipeline, and extends to the end of the burner.
9. a kind of method of burning pulverized solid fuels and oxygen, methods described includes：
Central oxygen stream is set to flow through central tube, the central tube extends to the end of burner, and the central tube is extended
External fuel pipeline to the end of the burner is surrounded；
The The fuel stream for making the dusty fuel in gas is transported flows through interior annulus, and the interior annulus are by being positioned at the center
Internal fuel pipe between pipeline and the external fuel pipeline is formed；
Make the The fuel stream that the interior annulus, the internal fuel pipe are left at the port of export of the internal fuel pipe
The port of export be positioned at the end upstream of the burner；
The The fuel stream is set to be divided into two streams, described two streams include：Inner annular conic type diffuser stream, it is by flattened conical
Shape current divider is formed, and the flattened conical shape current divider is with the port of export downstream for being positioned at the internal fuel pipe
Arrival end at X；And outer annular convergent nozzle stream, its be formed at the current divider and the external fuel pipeline it
Between, wherein, the inner annular conic type diffuser stream slows down, and the outer annular convergent nozzle stream accelerates；And
The inner annular conic type diffuser stream is set to flow through at least three radial vanes being positioned in the current divider.
10. method according to claim 9, it is characterised in that
Wherein, the port of export of the interior annulus has height h1；
Wherein, the arrival end of the annular cones shape diffuser has height h2；And
Wherein, h1 is more than h2.
11. methods according to claim 9 or 10, it is characterised in that further include：
The inner annular conic type diffuser stream is set to flow through blunt form body, the blunt form body is located so that institute
The rear end of blunt form body is stated near the upstream end of the radial vane.
12. methods according to claim 9 or 10, it is characterised in that the current divider is described including being oriented to be parallel with
The leading edge of external fuel pipeline.
13. methods according to claim 9 or 10, it is characterised in that further include：
External oxygen stream is set to flow through annular oxygen passage, the annular oxygen passage is limited by external oxygen pipeline, the external oxygen pipeline bag
The external fuel pipeline is enclosed, and extends to the end of the burner.
14. methods according to claim 13, it is characterised in that further include：
Two grades of oxygen streams are made to flow through two grades of oxygen pipelines, two grades of oxygen pipelines are spaced apart with the external oxygen pipeline, and extend to
The end of the burner.
15. methods according to claim 9, it is characterised in that the burner with less than stoichiometric oxygen amount operation,
Stoichiometric proportion is 0.05 to 0.5.
A kind of 16. reproducibility stoves, including：
Burner block, it has installed at least one of the side wall burning port of the stove；And
It is positioned at one or more solid fuels/oxygen burner of the adjacent edges of at least one burning port, the spray
Burner includes：
Extend to the central oxygen pipeline of the end of the burner；
External fuel pipeline, it surrounds the oxygen pipeline, and extends to the end of the burner；
Internal fuel pipe, it is positioned between the oxygen pipeline and the external fuel pipeline, with the oxygen pipeline and institute
State and formed between internal fuel pipe interior annulus, and the shape between the internal fuel pipe and the external fuel pipeline
Into outer annulus, the internal fuel pipe has the port of export in the end upstream of the burner；
Flattened conical shape current divider, it is positioned in the external fuel pipeline, and in internal fuel pipe downstream bag
The oxygen pipeline is enclosed, the diverter configuration is diverted to inner annular cone into the The fuel stream made in the external fuel pipeline
In diffuser and outer annular convergent nozzle；And
At least three radial vanes being positioned in the diffuser；
Wherein, the port of export of internal fuel pipe X spaced apart with the arrival end of the current divider；
Wherein, in lower port arrangement, one or more of burners be positioned in lower port arrangement it is described at least
One burning port lower section；And
Wherein, in side port arrangement, sidepiece of one or more of burners along described at least one burning port
Positioning.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361811175P | 2013-04-12 | 2013-04-12 | |
| US61/811175 | 2013-04-12 | ||
| US14/224,554 US20140305355A1 (en) | 2013-04-12 | 2014-03-25 | Oxy-Solid Fuel Burner |
| US14/224554 | 2014-03-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104100970A CN104100970A (en) | 2014-10-15 |
| CN104100970B true CN104100970B (en) | 2017-04-12 |
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ID=51669349
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410147431.0A Active CN104100970B (en) | 2013-04-12 | 2014-04-14 | Oxy-solid Fuel Burner |
Country Status (1)
| Country | Link |
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| CN (1) | CN104100970B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044281C (en) * | 1994-07-01 | 1999-07-21 | 浙江大学 | Adjustable concentration low load automatic smooth burning and slag-bonding protective device for coal powder furnace |
| CA2162244C (en) * | 1994-11-14 | 1999-04-27 | Hideaki Oota | Pulverized coal combustion burner |
| US6439136B1 (en) * | 2001-07-03 | 2002-08-27 | Alstom (Switzerland) Ltd | Pulverized solid fuel nozzle tip with ceramic component |
| JP2005024136A (en) * | 2003-06-30 | 2005-01-27 | Babcock Hitachi Kk | Combustion apparatus |
| JP2006052917A (en) * | 2004-08-16 | 2006-02-23 | Mitsubishi Heavy Ind Ltd | Pulverized coal burner and boiler |
| US8172566B2 (en) * | 2010-02-18 | 2012-05-08 | Air Products And Chemicals, Inc. | Liquid fuel combustion process and apparatus |
| US20140305355A1 (en) * | 2013-04-12 | 2014-10-16 | Air Products And Chemicals, Inc. | Oxy-Solid Fuel Burner |
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2014
- 2014-04-14 CN CN201410147431.0A patent/CN104100970B/en active Active
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| CN104100970A (en) | 2014-10-15 |
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