CN104100970A - Oxy-solid Fuel Burner - Google Patents
Oxy-solid Fuel Burner Download PDFInfo
- Publication number
- CN104100970A CN104100970A CN201410147431.0A CN201410147431A CN104100970A CN 104100970 A CN104100970 A CN 104100970A CN 201410147431 A CN201410147431 A CN 201410147431A CN 104100970 A CN104100970 A CN 104100970A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- oxygen
- burner
- fuel
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
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
cross reference with related application
The application requires the priority of the U.S. Provisional Application No. 61/811,175 submitting on April 12nd, 2013, and this application is combined in herein by reference and integrally.
Technical field
The application relates to the burner for buring solid fuel and oxygen.
Background technology
Partly because solid-fuelled volatile substances content is variable, so solid fuel is to be difficult to the fuel lighted in mobile stream.Therefore, typically, solid fuel can experience significant ignition delay, and this can cause the basic flame front separating with fuel nozzle.This is unsettled situation inherently, and this situation can cause high-caliber unburned carbon contained, unsettled process heating situation (heat transmissions, fusing etc.), and may cause fray-out of flame, this very fast and degeneration insecurely that can cause burning.
Have that a kind of can to form the burner that is attached to the solid fuel flame on burner end be desirable.This is the desirable situation inherently that farthest improves heat transmission, carbon after-flame and flame holding.
Summary of the invention
Describe a kind of burner herein, it has the central oxygen pipeline being surrounded by external fuel (powdered solid fuel/transport gas) pipeline.External fuel pipeline can be surrounded by external oxygen pipeline again.Inner fuel pipeline comprises upstream zone, and wherein, inner annular runner stops before the end of burner, and is discharged to suddenly in the larger intermediate annular section between external fuel pipeline and central oxygen pipeline.After centre portion, be downstream circular segments, downstream circular segments is included in inner annular diffuser and the outside nozzle ring (diffuser/Nozzle combination) of the either side of flattened conical shape current divider.Lead to the inlet port of diffuser/Nozzle combination and the outlet partition distance X of inner annular runner, this can affect the flow point cloth that enters described diffuser/Nozzle combination.Distance X must be greater than 0.Diffuser has the multiple radially stators that distribute around its periphery, so as to control flow point in diffuser from.
Dispersing of diffuser can reduce in check mode the speed of the Part I of solid fuel stream, and do not produce obvious flow point from.Solid-fuelled Part II flows with higher speed in the nozzle ring of assembling.The combination of flowing in fair speed stream and the low velocity of Flow Structure Nearby each other can produce larger stream recirculation pattern, and this substantially aids in fuel nozzle end and maintains stable burning.
Diffuser also can comprise the blunt form body (static mixing device) nearby of upstream that is positioned at stator radially.
Central oxygen can flow through central oxygen pipeline, and external oxygen can flow through external oxygen pipeline.Flow through the solid fuel of external fuel pipeline/transport gas flow to discharge from diffuser/Nozzle combination, diffuser/Nozzle combination has the VELOCITY DISTRIBUTION that is characterized as low internal speed (producing) and high external speed (producing) in diffuser in annular convergent nozzle.Oxygen, fuel and the combination of transporting gas can produce the stable solid fuel flame with nominal circular cross section.
The each side of system disclosed herein can be used alone, or with the use that is bonded to each other.
Aspect 1: a kind of solid fuel/oxygen burner, it comprises: extend to the central oxygen pipeline of the end of burner; External fuel pipeline, it surrounds oxygen pipeline, and extends the end to burner; Inner fuel pipeline, it is positioned between oxygen pipeline and external fuel pipeline, to form interior annulus between oxygen pipeline and inner fuel pipeline, and forming outside endless belt between inner fuel pipeline and external fuel pipeline, internal fuel pipe road has the port of export in the end upstream of burner; Flattened conical shape current divider, it is positioned in external fuel pipeline, and surrounds oxygen pipeline in inner fuel pipeline downstream, and diverter configuration becomes the ducted fuel flow of external fuel is diverted in inner annular conic type diffuser and outside annular convergent nozzle; And be positioned in diffuser at least three radially stators; Wherein, the port of export of inner fuel pipeline and the arrival end of current divider X spaced apart.
Aspect 2: according to the burner of aspect 1, wherein, the port of export of interior annulus has height h1; Wherein, the arrival end of annular cones shape diffuser has height h2; And wherein, h1 is greater than h2.
Aspect 3: according to the burner of aspect 1 or 2, further comprise: be positioned at the blunt form body in diffuser, blunt form body has leading edge and near the rear end upstream extremity of stator radially.
Aspect 4: according to the burner of aspect 3, wherein, blunt form body has perpendicular to the height h3 flowing to, from oxygen duct survey height h3; Wherein, at the vertical plane place overlapping with the leading edge of blunt form body, the height of inner annular conic type diffuser has height h4; And wherein, the ratio of h3/h4 is about 0.2 to about 0.5.
Aspect 5: according to the burner of aspect 4, wherein, radially stator has the axial length L out of the rear end from blunt form body to diffuser; And wherein, the ratio of Lout/h3 is about 3 to about 25.
Aspect 6: according to the burner of aspect 5, wherein, the ratio of Lout/h3 is about 5 to about 15.
Aspect 7: according to the burner of the either side in aspect 3 to 6, wherein, blunt form body is located so that the front end of blunt form body reaches distance L in from the arrival end of diffuser; Wherein, diffuser has inlet streams area A 2, and in the upstream of blunt form body flow area A3 nearby; And wherein, by the relation between the standardization position Lin/h2 of the ratio of A3/A2 and blunt form body set in basic prevention diffuser, have flow point from.
Aspect 8: according to the burner of the either side in aspect 1 to 7, wherein, current divider comprises and is oriented the leading edge that is basically parallel to external fuel pipeline.
Aspect 9: according to the burner of the either side in aspect 1 to 8, further comprise: external oxygen pipeline, it surrounds external fuel pipeline, and extends the end to burner.
Aspect 10: according to the burner of aspect 9, further comprise: secondary (secondary) oxygen pipeline, itself and external oxygen pipeline enclosure separate, and extend the end to burner.
Aspect 11: according to the burner of the either side in aspect 1 to 8, further comprise: the outside endless belt that forms three grades of (tertiary) oxygen pipelines.
Aspect 12: according to the burner of aspect 11, further comprise: secondary oxygen pipeline, itself and external fuel pipeline enclosure separate, and extend the end to burner.
Aspect 13: a kind of method of burning pulverized solid fuels and oxygen, the method comprises: the center oxygen flow of making flows through the central tube extending to the end of burner, central oxygen pipeline is extended to the external fuel pipeline of the end of burner and surrounds; Make to flow through interior annulus at the fuel flow that transports the dusty fuel in gas, interior annulus is formed by inner fuel pipeline, and inner fuel pipeline is positioned between oxygen pipeline and external fuel pipeline; Make fuel flow leave interior annulus at the port of export place of inner fuel pipeline, the port of export of inner fuel pipeline is positioned at the end upstream of burner; Make fuel flow be divided into two streams, two streams comprise: inner annular conic type diffuser stream, it is formed by flattened conical shape current divider, flattened conical shape current divider has the arrival end at the distance X place in the port of export downstream that is positioned at inner fuel pipeline, outside annular convergent nozzle stream is formed between current divider and external fuel pipeline, wherein, internal diffuser stream slows down, and external nozzles stream accelerates; And internal diffuser stream is flowed through be positioned in current divider at least three radially stators.
Aspect 14: according to the method for aspect 13, wherein, the port of export of interior annulus has height h1; Wherein, the arrival end of annular cones shape diffuser has height h2; And wherein, h1 is greater than h2.
Near aspect 15: according to the method for aspect 13 or 14, further comprise: make the internal diffuser stream blunt form body of flowing through, the rear end that blunt form body is located so that blunt form body is the upstream extremity of stator radially.
Aspect 16: according to the method for aspect 15, wherein, blunt form body has perpendicular to the height h3 flowing to, from oxygen duct survey height h3.
Aspect 17: according to the method for aspect 16, wherein, radially stator has the axial length L out of the rear end from blunt form body to diffuser; And wherein, the ratio of Lout/h3 is about 3 to about 25.
Aspect 18: according to the method for aspect 17, wherein, the ratio of Lout/h3 is about 5 to about 15.
Aspect 19: according to the method for the either side in aspect 14 to 17, wherein, blunt form body is located so that the front end of blunt form body reaches distance L in from the arrival end of diffuser; Wherein, diffuser has inlet streams area A 2, and in the upstream of blunt form body flow area A3 nearby; And wherein, by the relation between the standardization position Lin/h2 of the ratio of A3/A2 and blunt form body set in basic prevention diffuser, have flow point from.
Aspect 20: according to the method for the either side in aspect 13 to 19, wherein, current divider comprises and is oriented the leading edge that is basically parallel to external fuel pipeline.
Aspect 21: according to the method for the either side in aspect 13 to 20, further comprise: make inner oxygen flow flow through annular oxygen passage, annular oxygen passage is limited by external oxygen pipeline, external oxygen pipeline surrounds external fuel pipeline, and extends the end to burner.
Aspect 22: according to the method for aspect 21, further comprise: make secondary oxygen flow flow through secondary oxygen pipeline, secondary oxygen pipeline and external oxygen pipeline enclosure separate, and extend the end to burner.
Aspect 23: according to the method for the either side in aspect 13 to 20, further comprise: make three grades of oxygen flows flow through the outside endless belt between inner fuel pipeline and external fuel pipeline.
Aspect 24: according to the method for aspect 23, further comprise: make secondary oxygen flow flow through secondary oxygen pipeline, secondary oxygen pipeline and external fuel pipeline enclosure separate, and extend the end to burner.
Aspect 25: according to the method for the either side in aspect 13 to 24, further comprise: center oxygen flow is flowed to be less than about 20 speed to about 30 feet per seconds.
Aspect 26: according to the method for the either side in aspect 13 to 24, further comprise: center oxygen flow is flowed to be greater than about 20 speed to about 30 feet per seconds.
Aspect 27: a kind of reproducibility stove, it comprises: burner piece, it has at least one the burning port in the sidewall that is arranged on stove; And one or more solid fuel/oxygen burners, it is positioned near the edge of at least one burning port, and burner comprises: extend to the central oxygen pipeline of the end of burner; External fuel pipeline, it surrounds oxygen pipeline, and extends the end to burner; Inner fuel pipeline, it is positioned between oxygen pipeline and external fuel pipeline, to form interior annulus between oxygen pipeline and external fuel pipeline, and form outside endless belt between inner fuel pipeline and external fuel pipeline, inner fuel pipeline, it has the port of export in the end upstream of burner; Flattened conical shape current divider, it is positioned in external fuel pipeline, and surrounds oxygen pipeline in inner fuel pipeline downstream, and diverter configuration becomes the ducted fuel flow of external fuel is diverted in inner annular conic type diffuser and outside annular convergent nozzle; And be positioned in diffuser at least three radially stators; Wherein, the port of export of inner fuel pipeline and the arrival end of current divider X spaced apart; Wherein, in lower port is arranged, one or more burners are positioned at below at least one burning port in lower port is arranged; And wherein, in side port is arranged, one or more burners are along the sidepiece location of at least one burning port.
Near aspect 28: according to the stove of aspect 27, wherein, one or more burners are positioned at the edge of port and in the outside of port.
Near aspect 29: according to the stove of aspect 27, wherein, one or more burners are positioned at the edge of port and in port.
Aspect 30: a kind of in reproducibility stove the method for burning pulverized solid fuels and oxygen, the method comprises: make hot combustion air flow through regenerator burning port; Near the solid fuel/oxygen burner in edge that is positioned at burning port is provided; The center oxygen flow of making flows through the central tube extending to the end of burner, and central oxygen pipeline is extended to the external fuel pipeline of the end of burner and surrounds; Make to flow through interior annulus at the fuel flow dusty fuel stream transporting in gas, interior annulus is formed by the inner fuel pipeline being positioned between oxygen pipeline and external fuel pipeline; Make fuel flow leave interior annulus at the port of export place of inner fuel pipeline, the port of export of inner fuel pipeline is positioned at the end upstream of burner; Make fuel flow be divided into two streams, these two streams comprise: inner annular conic type diffuser stream, it is formed by flattened conical shape current divider, flattened conical shape current divider has the arrival end at the distance X place in the port of export downstream that is positioned at inner fuel pipeline, and inner annular convergent nozzle stream is formed between current divider and external fuel pipeline, wherein, internal diffuser stream slows down, and external nozzles stream accelerates; And internal diffuser stream is flowed through be positioned in current divider at least three radially stators.
Aspect 31: according to the method for aspect 30, further comprise and make three grades of oxygen flows flow through external fuel pipeline.
Aspect 32: according to the method for aspect 30, further comprise and make outside oxygen flow flow through external oxygen endless belt.
Aspect 33: according to the method for the either side in aspect 30 to 32, wherein, the fuel of discharging from burner and oxygen flow mix with air in the time that adjacent regenerator burning port leaves at air.
Aspect 34: according to the method for aspect 33, wherein, burner is to be less than the oxygen operation of stoichiometry, and stoichiometric proportion is about 0.05 to about 0.5.
Brief 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 surrounded by external fuel pipeline, the inner fuel pipeline that surrounds central oxygen pipeline is discharged in internal fuel pipe road in the end upstream of burner, and the fuel that leaves inner fuel pipeline is shunted by current divider between inner annular diffuser and outside annular convergent nozzle, current divider is positioned in external fuel pipeline, and has and the isolated arrival end of the port of export of inner fuel pipeline.Radially stator is positioned in diffuser, and at the some place in diffusor entry downstream.
Tu2Shi Dang center oxygen flow speed is less than fuel flow while leaving the speed of diffuser, the schematic diagram of the flow pattern of the burner of Fig. 1.
Tu3Shi Dang center oxygen flow speed is greater than fuel flow while leaving the speed of diffuser, the schematic diagram of the flow pattern of the burner of Fig. 1.
Fig. 4 is the schematic side elevational cross-sectional view of the embodiment of the burner as in Fig. 1, and wherein, current divider comprises straight parallel leading edge.
Fig. 5 is the schematic side elevational cross-sectional view of the embodiment of the burner as in Fig. 4, and wherein, the upstream extremity place that burner is further included in stator is positioned at the blunt form body in diffuser.
Fig. 6 is the schematic diagram of the flow pattern in the diffuser of Fig. 5.
Fig. 7 is that the schematic figure that flows the geometrical relationship separating with diffuser wall in order to stop of the diffuser of instruction as in Fig. 5 is described.
Fig. 8 is that alternative shape and a series of of form of the blunt form body for using in the burner as Fig. 5 schematically show.
Fig. 9 is the schematic side elevational cross-sectional view of the embodiment that further comprises outside annular oxygen pipeline of the burner as in Fig. 4.
Figure 10 is the schematic side elevational cross-sectional view of the embodiment of the burner as in Fig. 4, wherein, in three grades of oxygen outside endless belt between inner fuel pipeline and external fuel pipeline, flows.
Figure 11 is further comprising and the schematic side elevational cross-sectional view of the embodiment of the isolated secondary oxygen of the annular oxygen pipeline in outside pipeline of burner as in Fig. 9.
Figure 12 is further comprising and the schematic side elevational cross-sectional view of the embodiment of the isolated secondary oxygen of external fuel pipeline pipeline of burner as in Figure 10.
Figure 13 is the schematic end of reproducibility glass furnace burning port, and wherein, multiple burners of for example any embodiment described herein are arranged in lower port.Wherein, burner is positioned at below regenerator burning port.See to furnace sidewall and obtain end-view from furnace chamber.
Figure 14 is the schematic end of reproducibility glass furnace burning port, and wherein, multiple burners of for example any embodiment described herein are arranged in side port.Wherein, burner is along one or both sidepiece location of regenerator burning port.See to furnace sidewall and obtain end-view from furnace chamber.
Figure 15 is the schematic side elevational cross-sectional view of the embodiment that further comprises the combustion air conduit that surrounds external oxygen pipeline of the burner as in Fig. 9.
Figure 16 is the schematic side elevational cross-sectional view of the embodiment that further comprises the combustion air conduit that surrounds external fuel pipeline of the burner as in Figure 10.
Figure 17 is the schematic plan view that one or more burner described herein can be arranged on reproducibility stove wherein.
Detailed description of the invention
In order to describe herein, provide to give a definition.Transporting gas is the gaseous fluid for transmitting or transport solid fuel particulate, and can comprise air, oxygen-enriched air, nitrogen, carbon dioxide, recovery flue gas and their combination.Oxygen is to comprise concentration to be more than or equal to 28 % by mole of O
2, preferably greater than or equal to 60 % by mole of O
2, and more preferably greater than or equal 85 % by mole of O
2the gas of oxygen molecule.Solid fuel is the hydrocarbon fuel that is solid form, and can comprise petroleum coke; Various coals, it comprises anthracite, bituminous coal, subbituminous coal and brown coal; Mud coal, wood, grass, and other so-called biological quality material; Municipal solid waste material; And their combination.
Several embodiment and the modification of oxygen/powdered solid fuel burner are described herein.An embodiment of burner shown in Figure 1.Central oxygen pipeline is surrounded by external fuel pipeline, and oxygen pipeline and external fuel pipeline both extend the end to burner.The inner fuel pipeline that diameter is less than external fuel pipeline is positioned between oxygen pipeline and external fuel pipeline, and stops in the position of the end upstream of burner.Flattened conical shape current divider is positioned in external fuel pipeline, and surrounds oxygen pipeline in the position in the downstream of inner fuel pipeline.Current divider may extend into the end of burner, or can stop in the end upstream of burner.In certain embodiments, ducted or both of oxygen pipeline and external fuel extend to the end of burner.
Powdered solid fuel and transport gas and flow through downstream inner fuel pipeline, central oxygen flows through central oxygen pipeline.Outlet (afterwards) edge of inner fuel pipeline has annular opening, and annular opening is h1 from the height of oxygen pipeline.The outlet of inner fuel pipeline in axial direction separates length X with current divider.Entrance (upstream) edge of current divider has the highly annular opening for h2, and wherein, h2 is less than h1.Current divider produces two with circulation section: the circular diffuser between oxygen pipeline and current divider, and its stream cross-sectional area increases along flowing to; And annular convergent nozzle, it is between current divider and external fuel pipeline, and its cross-sectional area reduces along the flow direction.
In one embodiment, circular diffuser comprises separate around the periphery of diffuser channel at least three radially stators.Stator is to providing in check and separate from being formed at stream that each stator sends with the turning of the surperficial cross-shaped portion of central oxygen pipeline.The in check separation at interior corners place promotes again stream to be attached in the outer surface of diffuser, thereby with respect to there is no the radially circular diffuser of stator, improves diffuser stability.Radially stator needn't extend the whole axial length of diffuser.For example, as shown in Figure 1, radially stator starts in the arrival end downstream of diffuser.
Fuel and transport gas flow and leave inner fuel pipeline, and radially scatter in the time flowing to current divider downstream vertically.Based on fuel and the speed, the amplitude of distance X and the relative amplitude of annular opening h1 and h2 that transport gas flow, certain part of fuel flow enters diffuser, and remainder enters convergent nozzle.The part that flows through diffuser can experience axial velocity and reduce, and the part that flows through nozzle can experience axial velocity and increase.The low speed part in the exit of diffuser is stable for realizing, attached flame region is important, the high speed part in the exit of nozzle helps to produce large-scale annular between low-speed region and high-speed region and flows to (streamwise) eddy current, thereby improve mixing wherein, also make the combustion product recirculation from around hot simultaneously, thereby contribute to fire fuel.
Two not homogeneous turbulence mode can be associated with the burner structure of Fig. 1.First,, if center oxygen flow flows with lower speed, for example, lower than about 20-30 feet per second,, after central oxygen pipeline leaves, in burner downstream, flow pattern is nearby to illustrate qualitatively in Fig. 2.That is to say, form velocity wake region along burner axis, because a little less than the center momentum of burner, and outside momentum is strong.Again, if the speed of center oxygen flow is higher, for example, be greater than about 20-30 feet per second, the momentum of central oxygen jet stops axial velocity wake region to form to a great extent, but produce the fuel flow towards axis, and in Fig. 3, be illustrated in qualitatively burner downstream Mass flow pattern nearby.
The related embodiment showing in Fig. 4 is included in the leading edge on current divider, and leading edge is straight and be basically parallel to burner axis.The object of straight and parallel leading edge is the angle of attack between the diffuser wall by reducing to enter stream and disperse, and farthest reduces the flow disturbance in the porch of diffuser.
Another embodiment of burner is included in diffuser and is positioned near the radially blunt form body of leading edge of stator, for example as depicted in Figure 5.The function of blunt form body is that " resistance is stumbled (trip) " enters the stream of diffuser, thereby be conducive to stream and be attached to more reliably outside diffuser wall (in downstream, current divider) on, produce strong mixing, strong mixing is used for reducing the high speed peak value in the flow field of leaving diffuser simultaneously.Blunt form body has perpendicular to the height h3 flowing to, and radially stator has the length L out exporting to diffuser from the trailing edge of blunt form body.
In Fig. 6, show the qualitative explanation of the effect of blunt form body to diffuser stream.Note, in blunt form body downstream, form localization countercurrent zone at central oxygen Near Pipelines.For limit solid particle due to adverse current in diffuser channel the degree of deposit, the mixing length that is enough to regulate amount of flow is still provided, the dimensionless length L out/h3 that the trailing edge from blunt form body of diffuser section exports to diffuser (, by the standardization of blunt form body height) should be about 3 to about 25, and preferably approximately 5 to about 15.
Another factor of arranging blunt form body is with the ratio (A3/A2 representing in as Fig. 7) of the cross-sectional area at diffusor entry place and from the entrance of diffuser to the relation between the dimensionless entrance length Lin/h2 (, being diffused the open height standardization of device) of the leading edge of blunt form body at blunt form body upstream diffuser cross-sectional area nearby.
Known to fixed angles circular diffuser, the diffuser length of increase causes that flow point is from (being also referred to as stall (stall)) the most at last, and this can produce stream unstability, and upsets the VELOCITY DISTRIBUTION in diffuser.Towards radially the stream unstability of locating of the entrance of stator and the VELOCITY DISTRIBUTION of upset will cause nonstandard performance to the diffuser section in blunt form body downstream.Therefore,, in order to make burner realize optimum operation, can avoid upstream stall by dimensionless length L in/h2 (changing with Area Ratio A3/A2) is remained in the region below the curve showing in Fig. 7.
Contemplate except the representativeness dish of Fig. 5, effectively blunt form body can be taked other form and shape similarly.The shaped form that these alternative shape include, but is not limited to describe in Fig. 8 and triangle.No matter the shape of blunt form body how, its height h3 should be greater than it and flow to the half of thickness W on paper.
In another embodiment of current burner, external oxygen endless belt is positioned to introduce outside oxygen flow around the outer perimeters of the fuel flow that leaves burner, as shown in Figure 9.Mixing external oxygen and fuel flow are conducive to fuel flow to be lighted fast, and improves Fire Radiation transmission hot in nature.From operation angle, can in the situation that being with or without central oxygen, use external oxygen.Under latter event, can block the end of central oxygen passage, to stop partially combusted fuel and hot partial combustion product to enter.
Another embodiment of current burner eliminates external oxygen endless belt, but three grades of oxygen are incorporated in the endless belt between external fuel pipeline and inner fuel pipeline, as shown in Figure 10.The same with external oxygen, three grades of oxygen have similar effect to lighting with heat transmission, but realize in the less device of diameter.
Another embodiment of current burner combines " classification " oxygen flow, and " classification " oxygen flow is introduced near burner body and below, as described in Figure 11 and 12.Figure 11 is corresponding to the burner embodiment with external oxygen (Fig. 9), and Figure 12 is corresponding to the burner embodiment with three grades of oxygen (Figure 10).The major advantage of so-called classification oxygen is that it provides the means of controlling the length of flame and burner NOx discharge.Especially, by the oxygen that is less than stoichiometry being incorporated into the main body of burner, and remaining is incorporated into classification oxygen port, can makes the length of flame increase, and NOx is reduced.For example, in the time burning occurs degenerating (, it is unstable that flame becomes, CO discharge and the increase of unburned carbon), or with respect to process stove size, when flame becomes oversize, reach the actual upper bound as the classification oxygen amount of the certain percentage of stoichiometric number.Must carry out as the case may be to determine this limit.
In another structure, burner can surround by burned air.After this manner, burner can provide reinforcement to air-oxy-fuel burner.For example, Figure 15 and 16 illustrates that the burner embodiment as in Fig. 9 and 10 has extra extraneous air endless belt.Also can in the conduit of arbitrary cross section, introduce air around burner.
Burner described herein can be with the device that acts on heating and/or melt operation in system.Especially, burner can use in reproducibility glass furnace, for example, as shown in Figure 17.In known reproducibility stove, the burner piece with one or more burning ports is positioned on the relative sidepiece or end of stove combustion chamber.Each burning port typically comprises the one or more burners for fuel being transported to combustion chamber.Burning port also provides combustion air supply around burner.At stove run duration, the burner alternate run in a looping fashion on the relative sidepiece of combustion chamber.When burner in a side of combustion chamber is lighted, the combustion product of heat leaves the relative sidepiece of combustion chamber.Regenerator on the either side of stove or heat-resisting detector provide heat transmission medium, so that heat is delivered to the cold combustion air that is transported to stove from leaving the hot burning gases of combustion chamber.Combustion air and exhaust stream be reversing in every 20 minutes typically, makes each sidepiece detector all alternately heated, and for preheated burning air.Figure 17 shows reproducibility stove 10, and it has regenerator detector 12 on relative sidepiece.During the lighting of burner 22, combustion air is transported to the combustion chamber 16 of stove 10 from regenerator detector 12 by burning port 20.
Current disclosed burner has many modes can be configured to move in reproducibility glass furnace.A practical structure is and hot combustion air cooperation especially.Figure 13 and 14 for example illustrates exemplary embodiment, wherein, (one or more burners are arranged on hot combustion air port in reproducibility glass furnace, burning port) near, wherein, near represent that burner can be near the edge of port and in its outside, or near end and in port.In these embodiments, solid fuel is ejected in thermal air current in the time that thermal air current is discharged from burning port.Figure 13 illustrates exemplary lower port burning layout, and Figure 14 illustrates exemplary side port burning layout.In these embodiments, burner can be less than stoichiometric oxygen operation, as strengthening the means of solid fuel with the burning of the combustion air from regenerator port heat.For example, burner can the stoichiometric proportion between about 0.05 and about 0.5 move.
The present invention in scope, be not subject in example disclosed concrete aspect or embodiment limit, example is intended to illustrate several respects of the present invention, and function equate any embodiment within the scope of the invention.Except show herein and describe those, various amendments of the present invention will become apparent those skilled in the art, and be intended within the scope of the appended claims.
Claims (15)
1. solid fuel/oxygen burner, comprising:
Extend to the central oxygen pipeline of the end of described burner;
External fuel pipeline, it surrounds described oxygen pipeline, and extends the described end to described burner;
Inner fuel pipeline, it is positioned between described oxygen pipeline and described external fuel pipeline, to form interior annulus between described oxygen pipeline and described inner fuel pipeline, and forming outside endless belt between described inner fuel pipeline and described external fuel pipeline, described internal fuel pipe road has the port of export in the described end upstream of described burner;
Flattened conical shape current divider, it is positioned in described external fuel pipeline, and surround described oxygen pipeline in described inner fuel pipeline downstream, described diverter configuration becomes the ducted fuel flow of described external fuel is diverted in inner annular conic type diffuser and outside annular convergent nozzle; And
Be positioned in described diffuser at least three radially stators;
Wherein, the arrival end X spaced apart of the described port of export of described inner fuel pipeline and described current divider.
2. burner according to claim 1, is characterized in that,
Wherein, the described port of export of described interior annulus has height h1;
Wherein, the described arrival end of described annular cones shape diffuser has height h2; And
Wherein, h1 is greater than h2.
3. burner according to claim 1 and 2, is characterized in that, further comprises:
Be positioned at the blunt form body in described diffuser, described blunt form body has leading edge and near the rear end upstream extremity of described radially stator.
4. according to the burner described in any one in claims 1 to 3, it is characterized in that,
Described current divider comprises and is oriented the leading edge that is basically parallel to described external fuel pipeline.
5. according to the burner described in any one in claim 1 to 4, it is characterized in that, further comprise:
External oxygen pipeline, it surrounds described external fuel pipeline, and extends the described end to described burner.
6. according to burner described in any one in claim 1 to 4, it is characterized in that, further comprise:
Form the described outside endless belt of three grades of oxygen pipelines.
7. according to the burner described in claim 5 or 6, it is characterized in that, further comprise
Secondary oxygen pipeline, itself and described external fuel pipeline enclosure separate, and extend the described end to described burner.
8. a method for burning pulverized solid fuels and oxygen, described method comprises:
The center oxygen flow of making flows through central tube, and described central tube extends the end to burner, and described central oxygen pipeline is extended to the external fuel pipeline of the described end of described burner and surrounds;
Make to flow through interior annulus at the fuel flow that transports the dusty fuel in gas, described interior annulus is formed by the external fuel pipeline being positioned between described oxygen pipeline and described inner fuel pipeline;
Make described fuel flow leave described interior annulus at the port of export place of described inner fuel pipeline, the port of export of described inner fuel pipeline is positioned at the described end upstream of described burner;
Make described fuel flow be divided into two streams, described two streams comprise: inner annular conic type diffuser stream, it is formed by flattened conical shape current divider, and described flattened conical shape current divider has the arrival end at the distance X place in the described port of export downstream that is positioned at described inner fuel pipeline; And outside annular convergent nozzle stream, it is formed between described current divider and described external fuel pipeline, and wherein, described internal diffuser stream slows down, and described external nozzles stream accelerates; And
Described internal diffuser stream is flowed through be positioned in described current divider at least three radially stators.
9. method according to claim 8, is characterized in that,
Wherein, the described port of export of described interior annulus has height h1;
Wherein, the described arrival end of described annular cones shape diffuser has height h2; And
Wherein, h1 is greater than h2.
10. method according to claim 8 or claim 9, is characterized in that, further comprises:
Make the described internal diffuser stream blunt form body of flowing through, described blunt form body is located so that the rear end of described blunt form body is near the upstream extremity of described radially stator.
Method described in any one in 11. according to Claim 8 to 10, is characterized in that, described current divider comprises and is oriented the leading edge that is basically parallel to described external fuel pipeline.
Method described in any one in 12. according to Claim 8 to 11, is characterized in that, further comprises:
Make outside oxygen flow flow through annular oxygen passage, described annular oxygen passage is limited by external oxygen pipeline, and described external oxygen pipeline surrounds described external fuel pipeline, and extends the described end to described burner.
13. methods according to claim 12, is characterized in that, further comprise:
Make secondary oxygen flow flow through secondary oxygen pipeline, described secondary oxygen pipeline and described external oxygen pipeline enclosure separate, and extend the described end to described burner.
14. methods according to claim 8, is characterized in that, described burner is to be less than the oxygen operation of stoichiometry, and stoichiometric proportion is about 0.05 to about 0.5.
15. 1 kinds of reproducibility stoves, comprising:
Burner piece, it has at least one the burning port in the sidewall that is arranged on described stove; And
Near the one or more solid fuel/oxygen burners in edge that are positioned at described at least one burning port, described burner comprises:
Extend to the central oxygen pipeline of the end of described burner;
External fuel pipeline, it surrounds described oxygen pipeline, and extends the described end to described burner;
Inner fuel pipeline, it is positioned between described oxygen pipeline and described external fuel pipeline, to form interior annulus between described oxygen pipeline and described inner fuel pipeline, and forming outside endless belt between described inner fuel pipeline and described external fuel pipeline, described internal fuel pipe road has the port of export in the described end upstream of described burner;
Flattened conical shape current divider, it is positioned in described external fuel pipeline, and surround described oxygen pipeline in described inner fuel pipeline downstream, described diverter configuration becomes the ducted fuel flow of described external fuel is diverted in inner annular conic type diffuser and outside annular convergent nozzle; And
Be positioned in described diffuser at least three radially stators;
Wherein, the arrival end X spaced apart of the described port of export of described inner fuel pipeline and described current divider;
Wherein, in lower port is arranged, described one or more burners are positioned at below described at least one burning port in lower port is arranged; And
Wherein, in side port is arranged, described one or more burners are along the sidepiece location of described at least one burning port.
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 true CN104100970A (en) | 2014-10-15 |
| CN104100970B CN104100970B (en) | 2017-04-12 |
Family
ID=51669349
Family Applications (1)
| 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 |
|---|---|
| CN (1) | CN104100970B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098489A (en) * | 1994-07-01 | 1995-02-08 | 浙江大学 | Coal-powder boiler adjustable concentration low load automatic stable burning and slag-bonding protective device |
| US6116171A (en) * | 1994-11-14 | 2000-09-12 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized coal combustion burner |
| CN1551964A (en) * | 2001-07-03 | 2004-12-01 | ��ķ�Ƽ���������˾ | 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 |
| CN102192502A (en) * | 2010-02-18 | 2011-09-21 | 气体产品与化学公司 | Liquid fuel combustion process and apparatus |
| CN204042882U (en) * | 2013-04-12 | 2014-12-24 | 气体产品与化学公司 | Solid fuel/oxygen burner and reproducibility stove |
-
2014
- 2014-04-14 CN CN201410147431.0A patent/CN104100970B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098489A (en) * | 1994-07-01 | 1995-02-08 | 浙江大学 | Coal-powder boiler adjustable concentration low load automatic stable burning and slag-bonding protective device |
| US6116171A (en) * | 1994-11-14 | 2000-09-12 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized coal combustion burner |
| CN1551964A (en) * | 2001-07-03 | 2004-12-01 | ��ķ�Ƽ���������˾ | 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 |
| CN102192502A (en) * | 2010-02-18 | 2011-09-21 | 气体产品与化学公司 | Liquid fuel combustion process and apparatus |
| CN204042882U (en) * | 2013-04-12 | 2014-12-24 | 气体产品与化学公司 | Solid fuel/oxygen burner and reproducibility stove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104100970B (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102047041B (en) | Fuel injector for low NOx furnace | |
| KR100709849B1 (en) | Nox-reduced combustion of concentrated coal streams | |
| TWI402468B (en) | Low nox nozzle tip for a pulverized solid fuel furnace | |
| CN204042882U (en) | Solid fuel/oxygen burner and reproducibility stove | |
| CN102235666B (en) | Pulverized coal burner and pulverized coal fired boiler comprising same | |
| US7914279B2 (en) | Method and apparatus for injecting a gas into a two-phase stream | |
| CA2608054A1 (en) | Pulverized solid fuel burner | |
| CN104764005B (en) | solid fuel burner | |
| JP5386230B2 (en) | Fuel burner and swirl combustion boiler | |
| US7047891B2 (en) | Overfire air port and furnace system | |
| CN105135430A (en) | Steady-flame and low-nitrogen oxygen enrichment burner for solid fuel | |
| CN104100970A (en) | Oxy-solid Fuel Burner | |
| CN204026657U (en) | Solid fuel/oxygen burner and reproducibility stove | |
| CN201688400U (en) | Powdered coal burner and powdered coal boiler comprising the same | |
| CN104100969A (en) | Wide-flame, Oxy-solid Fuel Burner | |
| US10060620B2 (en) | Burner | |
| CN111306538A (en) | Small-size cyclone pulverized coal burner for laboratory | |
| MXPA03006141A (en) | Nox reduction in combustion with concentrated coal streams and oxygen injection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |