CN106678788B - Powdered fuel burner and combustion method - Google Patents
Powdered fuel burner and combustion method Download PDFInfo
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- CN106678788B CN106678788B CN201611091190.8A CN201611091190A CN106678788B CN 106678788 B CN106678788 B CN 106678788B CN 201611091190 A CN201611091190 A CN 201611091190A CN 106678788 B CN106678788 B CN 106678788B
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- Prior art keywords
- fuel gas
- fuel
- mix zone
- burner
- channel
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
Abstract
The present invention provides a kind of powdered fuel burner and combustion method.Powdered fuel burner of the invention includes: first sleeve and the second casing；First sleeve is set in the outside of the second casing, and first passage is formed between first sleeve and the second casing, and the second inside pipe casing forms second channel；The outlet of first sleeve extends outwardly relative to the outlet of the second casing, to limit a pre-mix zone；Wherein, first passage is fuel gas passageway, and second channel is powdered fuel channel；Or first passage is powdered fuel channel, second channel is fuel gas passageway.Powdered fuel burner and combustion method in the present embodiment make powdered fuel be very easy to be ignited, and then improve efficiency of combustion of the powdered fuel in hot-blast stove, and make hearth of hot-blast stove temperature easily controllable.
Description
Technical field
The present invention relates to combustion apparatus technology more particularly to a kind of powdered fuel burners and combustion method.
Background technique
During the work of dry pulverized coal hot-blast stove, the method for generalling use burning dry pulverized coal generates heat, for production
It is applied with life.
Dry pulverized coal and air are mainly fed together hearth of hot-blast stove by the coal dust burner of traditional hot-blast stove, in hot-blast stove
Dry pulverized coal is ignited burning, generates heat.But low volatile is handled using the coal dust burner of existing hot-blast stove or ultralow is waved
When the powdered fuel of hair point, the powdered fuel of low volatile or ultralow volatile matter can be made to be difficult to sufficiently be lighted,
The problem that efficiency of combustion is low and fire box temperature is uncontrollable is in turn resulted in.
Summary of the invention
The present invention provides a kind of powdered fuel burner and combustion method, to overcome low volatile in the prior art or super
The powdered fuel of low volatile is difficult to the technical issues of sufficiently being lighted in hearth of hot-blast stove.
The present invention provides a kind of powdered fuel burner, comprising: first sleeve and the second casing；
The first sleeve is set in the outside of second casing, shape between the first sleeve and second casing
At first passage, second inside pipe casing forms second channel；
The outlet of the first sleeve extends outwardly relative to the outlet of second casing, to limit a pre-mix zone；
Wherein, the first passage is fuel gas passageway, and the second channel is powdered fuel channel；Or it is described
First passage is powdered fuel channel, and the second channel is fuel gas passageway.
Burner as described above, the first sleeve are fuel gas bushing, and second casing is powdered fuel set
Pipe；
Outer wall at the powdered fuel cannula exit and between the inner wall of the fuel gas bushing, it is circumferentially arranged
There are fuel gas swirl-flow devices.
Burner as described above, the first sleeve are powdered fuel casing, and second casing is fuel air-casing
Pipe；
Support construction, the axis of the axis of the support construction and the fuel gas bushing are provided in the fuel gas bushing
Line is overlapped, and one end of the support construction is located in the plane where the entrance of the pre-mix zone；
It is circumferentially arranged to have fuel cyclonic current dress between inner wall at the support construction and the fuel gas cannula exit
It sets.
Burner as described above, the fuel gas swirl-flow devices include multiple flow deflectors and multiple spinning disks；The water conservancy diversion
Piece is connected with the spinning disk；
The flow deflector, for tentatively rectifying fuel gas；
The spinning disk, for entering institute after making the fuel gas after the flow deflector rectifies generate tangential component velocity
Pre-mix zone is stated, so that the fuel gas and the powdered fuel uniformly mix in the pre-mix zone；
Wherein, each flow deflector is parallel with the axis of the fuel gas bushing, each spinning disk and the axis
Angle is first angle.
Burner as described above, the burner further include: flameholder；
The inside of the pre-mix zone, the other end setting of the flameholder is arranged in one end of the flameholder
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 connect by multiple connectors with the first sleeve.
Burner as described above, the flameholder include interconnected hollow round table structure and hollow cylinder knot
Structure, the hollow round table structure are located at the inside of the pre-mix zone, and the hollow cylinder structure is located at the outer of the pre-mix zone
The intersection point in portion, the extended line of the bus of the hollow round table structure is located in plane locating for the pre-mix zone entrance.
Burner as described above, the flameholder further include:
Hemisphere structure, the hemisphere structure and the hollow round table structure connect close to one end of the pre-mix zone entrance
It connects.
Burner as described above, the flameholder are provided with through hole close to one end of the pre-mix zone entrance.
The diameter of burner as described above, the one end of the flameholder far from the pre-mix zone entrance is less than or equal to institute
State the diameter of first sleeve inner wall.
The present invention also provides a kind of powdered fuel combustion methods, comprising: the burner that the method uses is institute as above
The burner stated, which comprises
Pre-mix zone powdered fuel being sent by the powdered fuel channel of the burner in the burner；
Fuel gas is sent into the pre-mix zone by the fuel gas passageway of the burner so that the powdered fuel and
The fuel gas enters hot-blast 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 packet in the present invention
It includes: first sleeve and the second casing；First sleeve is set in the outside of the second casing, is formed between first sleeve and the second casing
First passage, the second inside pipe casing form second channel；The outlet of first sleeve extends outwardly relative to the outlet of the second casing,
To limit a pre-mix zone；Wherein, first passage is fuel gas passageway, and second channel is powdered fuel channel；Or the
One channel is powdered fuel channel, and second channel is fuel gas passageway.Powdered fuel burner in the present embodiment and
Combustion method makes powdered fuel be very easy to be ignited, and then improves burning of the powdered fuel in hot-blast stove
Efficiency, and make hearth of hot-blast stove temperature easily controllable.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram one of powdered fuel burner provided by the invention；
Fig. 2 is the structural schematic diagram two of powdered fuel burner provided by the invention；
Fig. 3 is the structural schematic diagram three of powdered fuel burner provided by the invention；
Fig. 4 is the structural schematic diagram four of powdered fuel burner provided by the invention；
Fig. 5 is the structural schematic diagram five of powdered fuel burner provided by the invention；
Fig. 6 is the view in powdered fuel burner direction A-A along Fig. 4 provided by the invention；
Fig. 7 is the flow diagram of combustion method provided by the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram one of powdered fuel burner provided by the invention, referring to Fig. 1, in the present embodiment
Powdered fuel burner includes:
First sleeve 101 and the second casing 102；First sleeve 101 is set in the outside of the second casing 102, first sleeve
101 and second form first passage between casing 102, form second channel inside the second casing 102；
The outlet of first sleeve 101 extends outwardly relative to the outlet of the second casing 102, to limit a pre-mix zone 103；
Wherein, first passage is fuel gas passageway, and second channel is powdered fuel channel；Or first passage is solid
Body pulverized fuel channel, second channel are fuel gas passageway.
Specifically, the powdered fuel for being mixed with air enters pre-mix zone, fuel gas by powdered fuel channel
Enter pre-mix zone by fuel gas passageway, powdered fuel and fuel gas enter in hot-blast stove after mixing in pre-mix zone to be fired
It burns.In the present embodiment, powdered fuel can be coal dust, coal ash, coke powder and other powder fuels, wherein coal dust can
For low volatile/ultralow volatile matter coal dust, coal ash can be the coal ash of low volatile low carbon content；Fuel gas can be naturally
Air-liquid liquefied oil gas, coal gas and other fuel gas.
Powdered fuel burner in the present embodiment increases fuel gas passageway, and fuel gas is entered by fuel gas passageway
In pre-mix zone, enter in hot-blast stove after being mixed with powdered fuel, due to the presence of gaseous fuel-fuel gas, solid powder
Fuel is very easy to be ignited, and the powdered fuel being ignited is capable of forming stable flame and temperature in hearth of hot-blast stove
, and the flow by adjusting fuel gas can control ignition temperature, exist so as to avoid existing powdered fuel burner
When handling the powdered fuel of low volatilization or ultralow volatile matter, caused by powdered fuel efficiency of combustion is low and fire box temperature
Uncontrollable problem.
The not position in fixed fuel gas channel and powdered fuel channel in the present embodiment, as long as being provided with fuel
Gas channel.
Powdered fuel burner in the present embodiment includes: first sleeve and the second casing；First sleeve is set in
The outside of two casings, forms first passage between first sleeve and the second casing, the second inside pipe casing forms second channel；First
The outlet of casing extends outwardly relative to the outlet of the second casing, to limit a pre-mix zone；Wherein, first passage is fuel gas
Channel, second channel are powdered fuel channel；Or first passage is powdered fuel channel, second channel is fuel
Gas channel.Powdered fuel burner in the present embodiment makes powdered fuel be very easy to be ignited, and then improves
Efficiency of combustion of the powdered fuel in hot-blast stove, and make hearth of hot-blast stove temperature easily controllable.
In order to enable powdered fuel and fuel gas mixed 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 provided by the invention solid
The structural schematic diagram two of body pulverized fuel burner, Fig. 3 are the structural schematic diagram three of powdered fuel burner provided by the invention,
Referring to fig. 2~3, the powdered fuel burner in the present embodiment further include: fuel gas swirl-flow devices 104.Fuel cyclonic current dress
The setting position for setting 104 includes following two mode.
Referring to fig. 2, a kind of mode are as follows: first sleeve 101 is fuel gas bushing, and the second casing 102 is powdered fuel
Casing；It is circumferentially arranged to have fuel cyclone between outer wall at powdered fuel cannula exit and the inner wall of fuel gas bushing
Flow device 104.
Referring to Fig. 3, another way are as follows: first sleeve 101 is powdered fuel casing, and the second casing 102 is fuel
Gas bushing；
Support construction 109, the axis of support construction 109 and the axis weight of fuel gas bushing are provided in fuel gas bushing
It closes, one end of support construction 109 is located in the plane where the entrance of pre-mix zone 103；Support construction 109 goes out with fuel gas bushing
It is circumferentially arranged to have fuel gas swirl-flow devices 104 between inner wall at mouthful.
Wherein, the fuel gas swirl-flow devices 104 of above two implementation include multiple flow deflectors and multiple spinning disks；It leads
Flow is connected with spinning disk；Flow deflector, for tentatively rectifying fuel gas；Spinning disk, for making the combustion after flow deflector rectifies
Material gas enters pre-mix zone after generating tangential component velocity, so that fuel gas and powdered fuel uniformly mix in pre-mix zone
It closes；Each flow deflector is parallel with the axis of fuel gas bushing, and the angle of the axis of each spinning disk and fuel gas bushing is first angle.
Specifically, fuel gas flow to the exit of fuel gas bushing after the fuel gas inlet entrance in fuel gas bushing,
It is flowed out by fuel gas swirl-flow devices 104.Fuel gas first passes around the region between each flow deflector, is tentatively rectified, using
There is the region between each spinning disk of certain angle with the axis of fuel gas bushing, enters in advance after generating a tangential component velocity
Confounding 103 carries powdered fuel and spins movement, and premixing effect is good, and entrance hot-blast stove post fuel gas and solid powder
The mixing of fuel further tends to uniformly, powdered fuel sufficiently be lighted, powdered fuel is in hot-blast stove
Middle flameholding, improves efficiency of combustion.First angle is 20 °~60 ° in the present embodiment.
In order to enable the flame stabilization in hot-blast stove, the present embodiment has been made further to change on the basis of the above embodiments
Into.Fig. 4 is that structural schematic diagram four, Fig. 5 of powdered fuel burner provided by the invention are solid powder provided by the invention
The structural schematic diagram five of fuel nozzle, Fig. 6 are the view in powdered fuel burner direction A-A along Fig. 4 provided by the invention.
Referring to fig. 4~6, the powdered fuel burner in the present embodiment further include: flameholder 105.
The inside of pre-mix zone 103 is arranged in one end of flameholder 105, and the other end setting of flameholder 105 exists
The outside of pre-mix zone 103, the distance between outlet and the outlet of pre-mix zone 103 of flameholder 105 are a pre-determined distance；Its
In, flameholder is connect 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 connect flameholder 105 with first sleeve 101 with stable.Preferably, the number of connector is 3.
Wherein, the structure of flameholder includes following two form.
Referring to fig. 4, a kind of form are as follows: flameholder 105 includes interconnected hollow round table structure 110 and hollow circle
Column structure 111, hollow round table structure 110 are located at the inside of pre-mix zone, and hollow cylinder structure 111 is located at pre-mix zone 103
The intersection point of outside, the extended line of the bus of hollow round table structure 110 is located in plane locating for 103 entrance of pre-mix zone.Wherein, in
The vertex angle theta of circular cone where empty frustum cone structure 110 is between 60 ° and 120 °.
Referring to Fig. 5, another form are as follows: flameholder 105 includes interconnected hemisphere structure 112, hollow circle
Platform structure 110 and hollow cylinder structure 111, hemisphere structure 112 and hollow round table structure 110 are close to 103 entrance of pre-mix zone
One end connection, hollow round table structure 110 is located at the inside of pre-mix zone 103, and hollow 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 plane locating for 103 entrance of pre-mix zone.Wherein,
Hemisphere structure 112 refers to the sphere after being cut off by plane, that is, a part of the sphere after being divided by plane.Wherein, in
The apex angle of circular cone where empty frustum cone structure 110 is between 60 ° and 120 °.
The flameholder of this kind of form, due to entrance of the arcuate structure close to pre-mix zone of hemisphere structure, pre-mix zone
Mixture after interior powdered fuel and fuel gas premix is when entering in hot-blast stove, said mixture and hemisphere structure
Arcuate structure contact, since arcuate structure is smoother, said mixture is smaller to the impact force of flameholder, in turn
To the abrasion of flameholder relative to small to the flameholder in Fig. 4, flameholder is lasted a long time.
Further, flameholder is provided with through hole 107 close to one end of pre-mix zone entrance；Through hole 107 is set
The reflux organizational form for setting the on the one hand adjustable flameholder back side, on the one hand plays cooling work to flameholder
With.
In order to enable the powdered fuel and fuel gas in pre-mix zone can be entered smoothly in hot-blast stove, flame is steady
The diameter for determining the one end of device far from pre-mix zone entrance is less than or equal to the diameter of first sleeve inner wall.
In addition, the powdered fuel sprayed by powdered fuel channel 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, Fig. 7 is the flow diagram of combustion method provided by the invention.This implementation
The burner that uses of combustion method in example is the burner in any of the above-described embodiment, the combustion method referring to Fig. 7, in the present embodiment
Include:
Pre-mix zone in S101, the powdered fuel channel feeding burner that powdered fuel is passed through burner；
S102, fuel gas is sent into pre-mix zone by the fuel gas passageway of burner, so that powdered fuel and fuel gas
Enter hot-blast stove after being sufficiently mixed in pre-mix zone.
Specifically, the step " premix in the feeding burner of powdered fuel channel that powdered fuel is passed through into burner
Area " and step " fuel gas is sent into pre-mix zone by the fuel gas passageway of burner " carry out simultaneously, to guarantee solid powder
Fuel and fuel gas enter back into hot-blast stove after being sufficiently mixed in pre-mix zone.
The present embodiment is by the way that fuel gas and powdered fuel to be passed into hot-blast stove simultaneously, so that powdered fuel
It is easy to be ignited, and then improves efficiency of combustion of the powdered fuel in hot-blast stove, and make hearth of hot-blast stove temperature
It is easily controllable.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of powdered fuel burner characterized by comprising first sleeve and the second casing；
The first sleeve is set in the outside of second casing, and is formed between the first sleeve and second casing
One channel, second inside pipe casing form second channel；
The outlet of the first sleeve extends outwardly relative to the outlet of second casing, to limit a pre-mix zone；
Wherein, the first passage is fuel gas passageway, and the second channel is powdered fuel channel；Or described first
Channel is powdered fuel channel, and the second channel is fuel gas passageway；
The burner further include: flameholder；
The inside of the pre-mix zone is arranged in one end of the flameholder, and the other end of the flameholder is arranged in institute
The outside of pre-mix zone is stated, the distance between outlet and the outlet of the pre-mix zone of the flameholder are a pre-determined distance；
Wherein, the flameholder is connect by multiple connectors with the first sleeve；
The flameholder includes interconnected hollow round table structure and hollow cylinder structure, the hollow round table structure
Positioned at the inside of the pre-mix zone, the hollow cylinder structure is located at the outside of the pre-mix zone, the hollow round table structure
The intersection point of extended line of bus be located in plane locating for the pre-mix zone entrance.
2. burner according to claim 1, which is characterized in that the first sleeve be fuel gas bushing, described second set
Pipe is powdered fuel casing；
Outer wall at the powdered fuel cannula exit and between the inner wall of the fuel gas bushing, it is circumferentially arranged to have combustion
Expect cyclonic current device.
3. burner according to claim 1, which is characterized in that the first sleeve is powdered fuel casing, described
Second casing is fuel gas bushing；
Support construction, the axis weight of the axis of the support construction and the fuel gas bushing are provided in the fuel gas bushing
It closes, one end of the support construction is located in the plane where the entrance of the pre-mix zone；
It is circumferentially arranged to have fuel gas swirl-flow devices between inner wall at the support construction and the fuel gas cannula exit.
4. burner according to claim 2 or 3, which is characterized in that the fuel gas swirl-flow devices include multiple flow deflectors
With multiple spinning disks；The flow deflector is connected with the spinning disk；
The flow deflector, for tentatively rectifying fuel gas；
The spinning disk, it is described pre- for entering after so that the fuel gas after the flow deflector rectifies is generated tangential component velocity
Confounding, so that the fuel gas and the powdered fuel uniformly mix in the pre-mix zone；
Wherein, each flow deflector is parallel with the axis of the fuel gas bushing, the angle of each spinning disk and the axis
For first angle.
5. burner according to claim 1, which is characterized in that the flameholder further include:
Hemisphere structure, the hemisphere structure are connect with the hollow round table structure close to one end of the pre-mix zone entrance.
6. burner according to claim 5, which is characterized in that the flameholder close to the pre-mix zone entrance one
End is provided with through hole.
7. burner according to claim 6, which is characterized in that the flameholder far from the pre-mix zone entrance one
The diameter at end is less than or equal to the diameter of the first sleeve inner wall.
8. a kind of powdered fuel combustion method characterized by comprising the burner that the method uses is claim 1
~7 described in any item burners, which comprises
Pre-mix zone powdered fuel being sent by the powdered fuel channel of the burner in the burner；
Fuel gas is sent into the pre-mix zone by the fuel gas passageway of the burner, so that the powdered fuel and described
Fuel gas enters hot-blast stove after being sufficiently mixed in the pre-mix zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091190.8A CN106678788B (en) | 2016-12-01 | 2016-12-01 | Powdered fuel burner and combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091190.8A CN106678788B (en) | 2016-12-01 | 2016-12-01 | Powdered fuel burner and combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106678788A CN106678788A (en) | 2017-05-17 |
| CN106678788B true CN106678788B (en) | 2019-04-30 |
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ID=58866073
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611091190.8A Active CN106678788B (en) | 2016-12-01 | 2016-12-01 | Powdered fuel burner and combustion method |
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| Country | Link |
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| CN (1) | CN106678788B (en) |
Families Citing this family (1)
| 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)
| 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 |
-
2016
- 2016-12-01 CN CN201611091190.8A patent/CN106678788B/en active Active
Patent Citations (5)
| 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 |
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| CN106678788A (en) | 2017-05-17 |
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