CN106678788A - Solid powder fuel burner and combustion method - Google Patents

Solid powder fuel burner and combustion method Download PDF

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Publication number
CN106678788A
CN106678788A CN201611091190.8A CN201611091190A CN106678788A CN 106678788 A CN106678788 A CN 106678788A CN 201611091190 A CN201611091190 A CN 201611091190A CN 106678788 A CN106678788 A CN 106678788A
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China
Prior art keywords
fuel gas
fuel
burner
mix zone
sleeve
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Granted
Application number
CN201611091190.8A
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Chinese (zh)
Other versions
CN106678788B (en
Inventor
白勇
秦亚杰
孙福林
蒋芹
毕大鹏
彭敏
刘欣
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Keda Industrial Co Ltd
Keda Clean Energy Co Ltd
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Keda Industrial Co Ltd
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Priority to CN201611091190.8A priority Critical patent/CN106678788B/en
Publication of CN106678788A publication Critical patent/CN106678788A/en
Application granted granted Critical
Publication of CN106678788B publication Critical patent/CN106678788B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D1/00Burners for combustion of pulverulent fuel
    • F23D1/02Vortex burners, e.g. for cyclone-type combustion apparatus

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The invention provides a solid powder fuel burner and a combustion method. The solid powder fuel burner comprises a first casing pipe and a second casing pipe. The first casing pipe is arranged at the outer portion of the second casing pipe in a sleeving manner. A first channel is formed between the first casing pipe and the second casing pipe. A second channel is formed in the second casing pipe. An outlet of the first casing pipe extends outwards relative to an outlet of the second casing pipe so that a pre-mixing area can be defined. The first channel is a fuel gas channel, and the second channel is a solid powder fuel channel; or the first channel is a solid powder fuel channel, and the second channel is a fuel gas channel. According to the solid powder fuel burner and the combustion method in the embodiment, solid powder fuel can be very easily ignited, and therefore the combustion efficiency of the solid powder fuel in a hot blast stove is improved, and the temperature of a hot blast stove hearth is easy to control.

Description

Powdered fuel burner and combustion method
Technical field
The present invention relates to combustion apparatus technology, more particularly to a kind of powdered fuel burner and combustion method.
Background technology
During dry pulverized coal air stove works, generally heat is produced using the method for burning dry pulverized coal, for production With life application.
Dry pulverized coal and air are mainly together sent into hearth of hot-blast stove by the coal dust burner of traditional air stove, in air stove Dry pulverized coal is ignited burning, produces heat.But, low volatile is processed using the coal dust burner of existing air stove or ultralow is waved When sending out the powdered fuel for dividing, the powdered fuel that can cause low volatile or ultralow volatile matters is difficult to fully be lighted, In turn result in that efficiency of combustion is low and the unmanageable problem of fire box temperature.
The content of the invention
The present invention provides a kind of powdered fuel burner and combustion method, to overcome prior art in low volatile or super The technical problem that the powdered fuel of low volatile is difficult to fully be lighted in hearth of hot-blast stove.
The present invention provides a kind of powdered fuel burner, including:First sleeve and the second sleeve pipe;
The first sleeve is set in the outside of second sleeve pipe, shape between the first sleeve and second sleeve pipe Into first passage, second inside pipe casing forms second channel;
The outlet of the first sleeve stretches out relative to the outlet of second sleeve pipe, to limit a pre-mix zone;
Wherein, the first passage is fuel gas passageway, and the second channel is powdered fuel passage;Or it is described First passage is powdered fuel passage, and the second channel is fuel gas passageway.
Burner as above, the first sleeve is fuel gas bushing, and second sleeve pipe is powdered fuel set Pipe;
Outer wall at the powdered fuel cannula exit and between the inwall of the fuel gas bushing, it is circumferentially arranged There are fuel gas swirl-flow devices.
Burner as above, the first sleeve is powdered fuel sleeve pipe, and second sleeve pipe is fuel air-casing Pipe;
It is provided with supporting construction in the fuel gas bushing, the axle of the axis of the supporting construction and the fuel gas bushing Line overlaps, and one end of the supporting construction is located in the plane that the entrance of the pre-mix zone is located;
It is circumferentially arranged to have fuel cyclonic current to fill between inwall at the supporting construction and the fuel gas cannula exit Put.
Burner as above, the fuel gas swirl-flow devices include multiple flow deflectors and multiple spinning disks;The water conservancy diversion Piece and the spinning disk connect;
The flow deflector, for preliminary rectification fuel gas;
The spinning disk, enter after tangential component velocity institute for the fuel gas after the flow deflector rectification to be produced Pre-mix zone is stated, so that the fuel gas and the powdered fuel uniformly mix in the pre-mix zone;
Wherein, the diameter parallel of each flow deflector and the fuel gas bushing, each spinning disk and the axis Angle is first angle.
Burner as above, the burner also includes:Flameholder;
One end of the flameholder is arranged on the inside of the pre-mix zone, and the other end of the flameholder is arranged In the outside of the pre-mix zone, the distance between the outlet of the flameholder and outlet of the pre-mix zone for one it is default away from From;Wherein, the flameholder is connected by multiple connectors with the first sleeve.
Burner as above, the flameholder includes the hollow round table structure being interconnected and hollow circular cylinder knot Structure, the hollow round table structure is located at the inside of the pre-mix zone, and the hollow circular cylinder structure is located at the outer of the pre-mix zone Portion, the intersection point of the extended line of the bus of the hollow round table structure is located in the plane residing for the pre-mix zone entrance.
Burner as above, the flameholder also includes:
Hemisphere structure, the hemisphere structure connects with the hollow round table structure near one end of the pre-mix zone entrance Connect.
Burner as above, the flameholder is provided with through hole near one end of the pre-mix zone entrance.
Burner as above, the flameholder is less than or equal to institute away from the diameter of one end of the pre-mix zone entrance State the diameter of first sleeve inwall.
The present invention also provides a kind of powdered fuel combustion method, including:The burner that methods described is adopted is as above institute The burner stated, methods described includes:
Powdered fuel is sent into the pre-mix zone in the burner by the powdered fuel passage of the burner;
Fuel gas is sent into into the pre-mix zone by the fuel gas passageway of the burner so that the powdered fuel and The fuel gas enters air stove after being sufficiently mixed in the pre-mix zone.
The present invention provides a kind of powdered fuel burner and combustion method.Powdered fuel burner bag in the present invention Include:First sleeve and the second sleeve pipe;First sleeve is set in the outside of the second sleeve pipe, is formed between first sleeve and the second sleeve pipe First passage, the second inside pipe casing forms second channel;The outlet of first sleeve stretches out relative to the outlet of the second sleeve pipe, To limit a pre-mix zone;Wherein, first passage is fuel gas passageway, and second channel is powdered fuel passage;Or the One passage is powdered fuel passage, and second channel is fuel gas passageway.Powdered fuel burner in the present embodiment and Combustion method causes powdered fuel to be very easy to be ignited, and then improves burning of the powdered fuel in air stove Efficiency, and cause hearth of hot-blast stove temperature easily controllable.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are these Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with Other accompanying drawings are obtained according to these accompanying drawings.
The structural representation one of the powdered fuel burner that Fig. 1 is provided for the present invention;
The structural representation two of the powdered fuel burner that Fig. 2 is provided for the present invention;
The structural representation three of the powdered fuel burner that Fig. 3 is provided for the present invention;
The structural representation four of the powdered fuel burner that Fig. 4 is provided for the present invention;
The structural representation five of the powdered fuel burner that Fig. 5 is provided for the present invention;
The view in powdered fuel burner A-A directions along Fig. 4 that Fig. 6 is provided for the present invention;
The schematic flow sheet of the combustion method that Fig. 7 is provided for the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The structural representation one of the powdered fuel burner that Fig. 1 is provided for the present invention, referring to Fig. 1, in the present embodiment Powdered fuel burner includes:
The sleeve pipe 102 of first sleeve 101 and second;First sleeve 101 is set in the outside of the second sleeve pipe 102, first sleeve 101 and second form first passage between sleeve pipe 102, and the second sleeve pipe 102 is internally formed second channel;
The outlet of first sleeve 101 stretches out relative to the outlet of the second sleeve pipe 102, to limit a pre-mix zone 103;
Wherein, first passage is fuel gas passageway, and second channel is powdered fuel passage;Or first passage is solid Body pulverized fuel passage, second channel is fuel gas passageway.
Specifically, the powdered fuel for being mixed with air enters pre-mix zone, fuel gas by powdered fuel passage Pre-mix zone is entered by fuel gas passageway, powdered fuel and fuel gas are entered after mixing in pre-mix zone and fired in air stove Burn.In the present embodiment, powdered fuel can be coal dust, coal ash, coke powder and other powder fuels, wherein, coal dust can For the coal dust of low volatile/ultralow volatile matters, coal ash can be the coal ash of low volatile low carbon content;Fuel gas can be natural Air-liquid liquefied oil gas, coal gas and other fuel gas.
Powdered fuel burner in the present embodiment increased fuel gas passageway, and fuel gas is entered by fuel gas passageway In pre-mix zone, enter in air stove, due to the presence of gaseous fuel-fuel gas, pressed powder after mixing with powdered fuel Fuel is very easy to be ignited, and the powdered fuel being ignited can form stable flame and temperature in hearth of hot-blast stove , and ignition temperature can be controlled by adjusting the flow of fuel gas, exist so as to avoid existing powdered fuel burner When processing the powdered fuel of low volatilization or ultralow volatile matters, the powdered fuel efficiency of combustion for causing is low and fire box temperature Unmanageable problem.
The not position of fixed fuel gas passage and powdered fuel passage in the present embodiment, as long as being provided with fuel Gas passage.
Powdered fuel burner in the present embodiment includes:First sleeve and the second sleeve pipe;First sleeve is set in The outside of two sleeve pipes, forms first passage between first sleeve and the second sleeve pipe, the second inside pipe casing forms second channel;First The outlet of sleeve pipe stretches out relative to the outlet of the second sleeve pipe, to limit a pre-mix zone;Wherein, first passage is fuel gas Passage, second channel is powdered fuel passage;Or first passage is powdered fuel passage, second channel is fuel Gas passage.Powdered fuel burner in the present embodiment causes powdered fuel to be very easy to be ignited, and then improves Efficiency of combustion of the powdered fuel in air stove, and cause hearth of hot-blast stove temperature easily controllable.
In order that powdered fuel and fuel gas mix in pre-mix zone it is more uniform so that powdered fuel It is easier to be ignited, the present embodiment has made further improvement on the basis of a upper embodiment.Fig. 2 is consolidating that the present invention is provided The structural representation two of body pulverized fuel burner, the structural representation three of the powdered fuel burner that Fig. 3 is provided for the present invention, Referring to Fig. 2~3, the powdered fuel burner in the present embodiment also includes:Fuel gas swirl-flow devices 104.Fuel cyclonic current is filled Putting 104 set location includes following two modes.
Referring to Fig. 2, a kind of mode is:First sleeve 101 is fuel gas bushing, and the second sleeve pipe 102 is powdered fuel Sleeve pipe;Outer wall at powdered fuel cannula exit and between the inwall of fuel gas bushing, it is circumferentially arranged to have fuel cyclone Stream device 104.
Referring to Fig. 3, another way is:First sleeve 101 is powdered fuel sleeve pipe, and the second sleeve pipe 102 is fuel Gas bushing;
Supporting construction 109, the axis of supporting construction 109 and the axis weight of fuel gas bushing are provided with fuel gas bushing Close, one end of supporting construction 109 is located in the plane that the entrance of pre-mix zone 103 is located;Supporting construction 109 goes out with fuel gas bushing It is circumferentially arranged to have fuel gas swirl-flow devices 104 between inwall at mouthful.
Wherein, the fuel gas swirl-flow devices 104 of above two implementation include multiple flow deflectors and multiple spinning disks;Lead Flow and spinning disk connect;Flow deflector, for preliminary rectification fuel gas;Spinning disk, for making the combustion after flow deflector rectification Material gas is produced and enter after tangential component velocity pre-mix zone, so that fuel gas and powdered fuel are uniformly mixed in pre-mix zone Close;The diameter parallel of each flow deflector and fuel gas bushing, each spinning disk is first angle with the angle of the axis of fuel gas bushing.
Specifically, after fuel gas inlet of the fuel gas from fuel gas bushing is entered, the exit of fuel gas bushing is flow to, Flow out through fuel gas swirl-flow devices 104.Fuel gas first passes around the region between each flow deflector, by preliminary rectification, then passes through There is the region between each spinning disk of certain angle with the axis of fuel gas bushing, produce and entered in advance after a tangential component velocity Confounding 103, carries powdered fuel and spins motion, and premixing effect is good, and into air stove post fuel gas and pressed powder The mixing of fuel is further tended to uniformly so that powdered fuel can be lighted fully, and powdered fuel is in air stove Middle flameholding, improves efficiency of combustion.In the present embodiment first angle is 20 °~60 °.
In order that the flame stabilization in air stove, the present embodiment has been made further to change on the basis of above-described embodiment Enter.The pressed powder that the structural representation four, Fig. 5 of the powdered fuel burner that Fig. 4 is provided for the present invention is provided for the present invention The structural representation five of fuel nozzle, the view in powdered fuel burner A-A directions along Fig. 4 that Fig. 6 is provided for the present invention. Referring to Fig. 4~6, the powdered fuel burner in the present embodiment also includes:Flameholder 105.
One end of flameholder 105 is arranged on the inside of pre-mix zone 103, and the other end of flameholder 105 is arranged on The distance between the outside of pre-mix zone 103, the outlet of flameholder 105 and outlet of pre-mix zone 103 are a predeterminable range;Its In, flameholder is connected by multiple connectors 108 with first sleeve.
Specifically, referring to Fig. 6, in the present embodiment, connector 108 circumferentially uniformly divides in the exit of pre-mix zone 103 Cloth, is connected with the stable flameholder 105 that makes with first sleeve 101.Preferably, the number of connector is 3.
Wherein, the structure of flameholder includes following two forms.
Referring to Fig. 4, a kind of form is:Flameholder 105 includes the hollow round table structure 110 being interconnected and hollow circle Column structure 111, hollow round table structure 110 is located at the inside of pre-mix zone, and hollow circular cylinder structure 111 is located at pre-mix zone 103 Outside, the intersection point of the extended line of the bus of hollow round table structure 110 is located in the plane residing for the entrance of pre-mix zone 103.Wherein, in The vertex angle theta of the circular cone that empty frustum cone structure 110 is located is between 60 ° and 120 °.
Referring to Fig. 5, another kind of form is:Flameholder 105 includes hemisphere structure 112, the hollow circle being interconnected Platform structure 110 and hollow circular cylinder structure 111, hemisphere structure 112 is with hollow round table structure 110 near the entrance of pre-mix zone 103 One end connection, hollow round table structure 110 be located at pre-mix zone 103 inside, hollow circular cylinder structure 111 be located at pre-mix zone 103 Outside, the intersection point of the extended line of the bus of hollow round table structure 110 is located in the plane residing for the entrance of pre-mix zone 103.Wherein, Hemisphere structure 112 refers to the spheroid after being cut off by plane, that is, a part for the spheroid after being split by plane.Wherein, in The drift angle of the circular cone that empty frustum cone structure 110 is located is between 60 ° and 120 °.
The flameholder of this kind of form, due to hemisphere structure arcuate structure near pre-mix zone entrance, pre-mix zone When mixture after interior powdered fuel and fuel gas premix is entered in air stove, said mixture and hemisphere structure Arcuate structure is contacted, and because arcuate structure is smoother, therefore said mixture is less to the impact force of flameholder, and then To the abrasion of flameholder relative to little to the flameholder in Fig. 4, flameholder is lasted a long time.
Further, flameholder is provided with through hole 107 near one end of pre-mix zone entrance;Through hole 107 sets On the one hand put can adjust the backflow type of organization at the flameholder back side, and the work of cooling is on the one hand played to flameholder With.
In order that the powdered fuel and fuel gas in pre-mix zone can be entered into smoothly in air stove, flame is steady Determine the diameter that device is less than or equal to first sleeve inwall away from the diameter of one end of pre-mix zone entrance.
Additionally, the powdered fuel sprayed by powdered fuel passage can edge under the rectified action of flameholder Circumferential diffusion, further such that the mixing of powdered fuel and fuel gas is more uniform.
The present invention also provides a kind of combustion method, the schematic flow sheet of the combustion method that Fig. 7 is provided for the present invention.This enforcement The burner that adopts of combustion method in example for the burner in any of the above-described embodiment, referring to Fig. 7, the combustion method in the present embodiment Including:
S101, the pre-mix zone sent into powdered fuel by the powdered fuel passage of burner in burner;
S102, the fuel gas passageway feeding pre-mix zone that fuel gas is passed through into burner, so that powdered fuel and fuel gas Air stove is entered after being sufficiently mixed in pre-mix zone.
Specifically, step " powdered fuel is sent into the premix in burner by the powdered fuel passage of burner Area " and step " fuel gas is sent into into pre-mix zone by the fuel gas passageway of burner " are carried out simultaneously, to ensure pressed powder Fuel and fuel gas enter back into air stove after being sufficiently mixed in pre-mix zone.
The present embodiment is by the way that fuel gas and powdered fuel are passed in air stove simultaneously so that powdered fuel It is easy to be ignited, and then improves efficiency of combustion of the powdered fuel in air stove, and causes hearth of hot-blast stove temperature It is easily controllable.
Finally it should be noted that:Various embodiments above only to illustrate technical scheme, rather than a limitation;To the greatest extent Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that:Its according to So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered Row equivalent;And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution The scope of scheme.

Claims (10)

1. a kind of powdered fuel burner, it is characterised in that include:First sleeve and the second sleeve pipe;
The first sleeve is set in the outside of second sleeve pipe, and is formed between the first sleeve and second sleeve pipe One passage, second inside pipe casing forms second channel;
The outlet of the first sleeve stretches out relative to the outlet of second sleeve pipe, to limit a pre-mix zone;
Wherein, the first passage is fuel gas passageway, and the second channel is powdered fuel passage;Or described first Passage is powdered fuel passage, and the second channel is fuel gas passageway.
2. burner according to claim 1, it is characterised in that the first sleeve is fuel gas bushing, described second set Manage as powdered fuel sleeve pipe;
Outer wall at the powdered fuel cannula exit and between the inwall of the fuel gas bushing, it is circumferentially arranged to have combustion Material cyclonic current device.
3. burner according to claim 1, it is characterised in that the first sleeve is powdered fuel sleeve pipe, described Second sleeve pipe is fuel gas bushing;
It is provided with supporting construction in the fuel gas bushing, the axis weight of the axis of the supporting construction and the fuel gas bushing Close, one end of the supporting construction is located in the plane that the entrance of the pre-mix zone is located;
It is circumferentially arranged to have fuel gas swirl-flow devices between inwall at the supporting construction and the fuel gas cannula exit.
4. the burner according to Claims 2 or 3, it is characterised in that the fuel gas swirl-flow devices include multiple flow deflectors With multiple spinning disks;The flow deflector and the spinning disk connect;
The flow deflector, for preliminary rectification fuel gas;
The spinning disk, it is described pre- for produce the fuel gas after the flow deflector rectification enter after tangential component velocity Confounding, so that the fuel gas and the powdered fuel uniformly mix in the pre-mix zone;
Wherein, the diameter parallel of each flow deflector and the fuel gas bushing, the angle of each spinning disk and the axis For first angle.
5. the burner according to any one of Claims 1 to 4, it is characterised in that the burner also includes:Flameholder;
One end of the flameholder is arranged on the inside of the pre-mix zone, and the other end of the flameholder is arranged on institute State the outside of pre-mix zone, the distance between the outlet of the flameholder and outlet of the pre-mix zone are a predeterminable range; Wherein, the flameholder is connected by multiple connectors with the first sleeve.
6. burner according to claim 5, it is characterised in that the flameholder includes the hollow round table being interconnected Structure and hollow circular cylinder structure, the hollow round table structure is located at the inside of the pre-mix zone, the hollow circular cylinder structure Positioned at the outside of the pre-mix zone, the intersection point of the extended line of the bus of the hollow round table structure is located at the pre-mix zone entrance institute In the plane at place.
7. burner according to claim 6, it is characterised in that the flameholder also includes:
Hemisphere structure, the hemisphere structure is connected with the hollow round table structure near one end of the pre-mix zone entrance.
8. burner according to claim 7, it is characterised in that the flameholder near the pre-mix zone entrance one End is provided with through hole.
9. burner according to claim 8, it is characterised in that the flameholder away from the pre-mix zone entrance one Diameter of the diameter at end less than or equal to the first sleeve inwall.
10. a kind of powdered fuel combustion method, it is characterised in that include:The burner that methods described is adopted is for claim 1 Burner described in~9 any one, methods described includes:
Powdered fuel is sent into the pre-mix zone in the burner by the powdered fuel passage of the burner;
Fuel gas is sent into into the pre-mix zone by the fuel gas passageway of the burner, so that the powdered fuel and described Fuel gas enters air stove after being sufficiently mixed in the pre-mix zone.
CN201611091190.8A 2016-12-01 2016-12-01 Powdered fuel burner and combustion method Active CN106678788B (en)

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CN106678788B CN106678788B (en) 2019-04-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109489035A (en) * 2018-12-28 2019-03-19 中冶京诚(扬州)冶金科技产业有限公司 A kind of low NOx drainage burner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060158A (en) * 1979-10-02 1981-04-29 Shell Int Research Solid fuel combustion
CN102183022A (en) * 2011-04-21 2011-09-14 扬州市银焰机械厂 Multi-channel mixed fuel burner
CN104676587A (en) * 2015-03-16 2015-06-03 上海锅炉厂有限公司 Composite powder body fuel cyclone combustor
CN106147876A (en) * 2016-08-30 2016-11-23 安徽科达洁能股份有限公司 Gasification burner tip
CN206347565U (en) * 2016-12-01 2017-07-21 安徽科达洁能股份有限公司 Powdered fuel burner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060158A (en) * 1979-10-02 1981-04-29 Shell Int Research Solid fuel combustion
CN102183022A (en) * 2011-04-21 2011-09-14 扬州市银焰机械厂 Multi-channel mixed fuel burner
CN104676587A (en) * 2015-03-16 2015-06-03 上海锅炉厂有限公司 Composite powder body fuel cyclone combustor
CN106147876A (en) * 2016-08-30 2016-11-23 安徽科达洁能股份有限公司 Gasification burner tip
CN206347565U (en) * 2016-12-01 2017-07-21 安徽科达洁能股份有限公司 Powdered fuel burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109489035A (en) * 2018-12-28 2019-03-19 中冶京诚(扬州)冶金科技产业有限公司 A kind of low NOx drainage burner

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