CN106247326A - A kind of cyclone classified burner and combustion method thereof - Google Patents
A kind of cyclone classified burner and combustion method thereof Download PDFInfo
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- CN106247326A CN106247326A CN201610602312.9A CN201610602312A CN106247326A CN 106247326 A CN106247326 A CN 106247326A CN 201610602312 A CN201610602312 A CN 201610602312A CN 106247326 A CN106247326 A CN 106247326A
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- secondary combustor
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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
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Abstract
The present invention relates to vortex burner technical field, particularly relate to a kind of cyclone classified burner, including Whirlwind barrel and liquid slag collecting box；Whirlwind barrel is divided into the diameter diameter less than the cylinder of middle part main chamber of the cylinder of upper secondary combustor, middle part main chamber and lower secondary combustor, the diameter of the cylinder of upper secondary combustor and lower secondary combustor；Upper secondary combustor, middle part main chamber and lower secondary combustor respectively set an air inlet；Air inlet is equipped with the toroidal helical passage of incision Whirlwind barrel inwall；The toroidal helical passage of upper secondary combustor and the toroidal helical passage of lower secondary combustor all tilt to main chamber direction, middle part；Liquid slag collecting box is located at the lower end of Whirlwind barrel.The present invention uses fuel and the mode of air combined fractional combustion, significantly reduces the discharge of thermal NO and prompt NO, improves efficiency of combustion.
Description
Technical field
The present invention relates to vortex burner technical field, particularly relate to a kind of cyclone classified burner and combustion method thereof.
Background technology
Vortex burner utilizes the high speed rotating effect of air stream at cylinder type combustor, it is possible to by coal dust, ickings or its
The solid fuel particle that he pulverizes throws to barrel, and solid fuel particle is burnt in the space near barrel and barrel,
And define high-temperature area around, lime-ash can be made to melt, and air-flow and the solid fuel sticked on liquid slag film
There is between Li the highest relative velocity, promote fuel to be sufficiently mixed with air, burn.Vortex burner ignition temperature ratio
General coal-powder boiler temperature wants height, and nitrogen can produce nitrogen oxides in high temperature environments, causes the amount of nitrogen oxides in flue gas
Higher.The generation of nitrogen oxides is mainly by three kinds of modes: the nitrogen oxidation that the nitrogen in combustion air at high temperature aoxidizes and generates
Thing is thermal NO；It is fuel type that organonitrogen compound in fuel aoxidizes the nitrogen oxides of generation in combustion
Nitrogen oxides, it is fast that hydrocarbon system fuel decomposes the nitrogen oxides of produced intermediate product and nitrogen reaction generation when burning
Speed type nitrogen oxides, environment can be impacted by the nitrogen oxides of generation.
Vortex burner of the prior art utilizes reducibility gas to be reduced by the nitrogen oxides produced in burning, but
It is to make the heating power type of generation and prompt NO effectively reduce, or by axis between coal dust to importing
Carry out cyclone firing, a district of localized hyperthermia can be formed in cylinder to crack coal dust, improve the burn-off rate of coal dust, but office
Portion's high temperature uncontrollable heating power type and the discharge of prompt NO.
Summary of the invention
(1) to solve the technical problem that
It is an object of the invention to provide a kind of cyclone classified burner and combustion method, when reducing solid fuel particle burning
The discharge of nitrogen oxides.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of cyclone classified burner, including Whirlwind barrel and
Liquid slag collecting box；Described Whirlwind barrel is divided into upper secondary combustor, middle part main chamber and lower secondary combustor, described top
The diameter of the cylinder of the diameter of the cylinder of subsidiary combustion chamber and described lower secondary combustor is less than the cylinder of described middle part main chamber
Diameter；Described upper secondary combustor, middle part main chamber and lower secondary combustor respectively set an air inlet；Described air inlet
It is equipped with the toroidal helical passage of incision Whirlwind barrel inwall；The toroidal helical passage of described upper secondary combustor and lower secondary combustion
The toroidal helical passage burning room all tilts to main chamber direction, middle part；Described liquid slag collecting box is located at described Whirlwind barrel
Lower end.
Wherein, the inwall of described Whirlwind barrel is provided with helical form guiding gutter.
Wherein, the toroidal helical passage of described upper secondary combustor and the toroidal helical passage of lower secondary combustor are to middle part
The angle that main chamber direction tilts is 3 °～20 °.
Wherein, described helical form guiding gutter, going out of described toroidal helical passage are close in the outlet of described toroidal helical passage
Mouth is provided with scuff-resistant coating with the junction of helical form guiding gutter.
Wherein, the cylinder of described middle part main chamber includes the first cylinder and and the lower secondary being connected with upper secondary combustor
The second cylinder that combustor connects, described first cylinder is up-small and down-big cone barrel, and described second cylinder is up big and down small
Cone barrel.
Wherein, the second cylinder of described middle part main chamber forms 3 °～the inclination angle of 30 ° with its axis.
Wherein, the top of the cylinder of described upper secondary combustor is straight barrel type, and bottom is up big and down small cone barrel, bottom
The cylinder of cone barrel forms 3 °～the inclination angle of 30 ° with its axis, and the cylinder of described lower secondary combustor is straight barrel type.
Present invention also offers the combustion method of a kind of above-mentioned cyclone classified burner, comprise the following steps:
S1, is passed through with solid fuel particle to top subsidiary combustion chamber, middle part main chamber and lower secondary combustor respectively
Air；
S2, the air with solid fuel particle respectively enters upper secondary combustor, middle part through described toroidal helical passage
Main chamber and lower secondary combustor form fuel gas stream, and fuel gas stream forms eddy flow along helical form guiding gutter and starts burning；
S3, the fuel gas stream of upper secondary combustor and the fuel gas stream of lower secondary combustor all along helical form guiding gutter in
Portion's main chamber impact, middle part main chamber is fired by the reducibility gas that upper secondary combustor and lower secondary combustor are formed simultaneously
Burn the nitrogen oxides produced to reduce；
S4, after having burnt, the flue gas that fuel gas stream burning is formed is discharged by described Whirlwind barrel upper end, produces simultaneously
Melt cinder collected by liquid slag collecting box.
Preferably, upper secondary combustor described in step S1, middle part main chamber and the solid fuel of lower secondary combustor
Granule intake ratio is 1:6:3, and air intake ratio is 3:6:1.
(3) beneficial effect
The technique scheme of the present invention compared with prior art has the advantage that the cyclone classified combustion that the present invention provides
In burner, Whirlwind barrel has been divided into the upper secondary combustor of three different-diameters, middle part main chamber and lower secondary combustor, logical
Cross fuel and the mode of air combined fractional combustion, significantly reduce the generation of thermal NO.Owing to upper secondary is fired
The diameter of the cylinder burning room and lower secondary combustor is respectively less than the diameter of the cylinder of middle part main chamber, upper subsidiary combustion chamber and under
The air-flow that portion's subsidiary combustion chamber produces can produce disturbance impact to middle part main chamber, and upper subsidiary combustion chamber and lower secondary combustor produce
Raw reducibility gas can produce nitrogen oxides to the burning of middle part main chamber and reduce, and reduces middle part main chamber and produces
Nitrogen oxides.
Accompanying drawing explanation
Fig. 1 is the structural representation of the cyclone classified burner of the embodiment of the present invention；
Fig. 2 is the top plan view of the embodiment of the present invention cyclone classified burner annular helical duct；
Fig. 3 is the partial enlarged drawing of the helical form guiding gutter of the cyclone classified burner of the embodiment of the present invention.
In figure: 1: Whirlwind barrel；2: upper secondary combustor；3: middle part main chamber；4: lower secondary combustor；5: annular spiral shell
Rotation passage；6: helical form guiding gutter；7: liquid slag collecting box.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage 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
A part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
Although the demonstration of the parameter comprising particular value can be provided herein, it is to be understood that parameter is worth equal to corresponding without definite, but can
It is similar to be worth accordingly in acceptable error margin or design constraint.Additionally, the direction term mentioned in following example,
Such as " on ", D score, "front", "rear", "left", "right" etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is
It is used for illustrating not for limiting the present invention.
As shown in Figure 1 and Figure 2, the cyclone classified burner of one that the embodiment of the present invention provides, including Whirlwind barrel 1 and
Liquid slag collecting box 7；Whirlwind barrel 1 is divided into upper secondary combustor 2, middle part main chamber 3 and lower secondary combustor 4, upper secondary
The diameter of the cylinder of the diameter of the cylinder of combustor 2 and lower secondary combustor 4 is less than the diameter of the cylinder of middle part main chamber 3；
Upper secondary combustor 2, middle part main chamber 3 and lower secondary combustor 4 respectively set an air inlet；Upper secondary combustor 2, middle part master
The air inlet of combustor 3 and lower secondary combustor 4 is equipped with the toroidal helical passage 5 of incision Whirlwind barrel 1 inwall, upper secondary
The toroidal helical passage 5 of combustor 2 and the toroidal helical passage 5 of lower secondary combustor 4 all incline to middle part main chamber 3 direction
Tiltedly.Liquid slag collecting box 7 is located at the lower end of Whirlwind barrel 1.With the air of coal dust respectively from upper secondary combustor 2, middle part master
The toroidal helical passage 5 that the air inlet of combustor 3 and lower secondary combustor 4 is provided with is passed through in combustor, makes entrance combustor
Air by combustor produce flue gas preheat, reduce the exhaust gas temperature of cyclone classified burner, improve simultaneously
The thermal efficiency of cyclone classified burner.Achieving the classification compound combustion of fuel and air, upper secondary combustor 2 fires with lower secondary
The flame peak temperature burning room 4 is relatively low, it is possible to reduce the discharge of thermal NO.Toroidal helical passage 5 is provided with an inclination
Angle can improve the peripheral speed of the fuel gas stream being passed through each combustor.Toroidal helical passage 5 He of upper secondary combustor 2
The toroidal helical passage 5 of lower secondary combustor 4 all tilts to make fuel gas stream main combustion to middle part to middle part main chamber 3 direction
Burn room 3 to impact, and the diameter of the cylinder of upper secondary combustor 2 and lower secondary combustor 4 is respectively less than the cylinder of middle part main chamber 3
Diameter, eddy flow disturbance can be made more strong, improve eddy flow centrifugal force by reducing barrel diameter, improve efficiency of combustion, and
Need not complete by the way of increasing ventilation.
Preferably, as it is shown on figure 3, the inwall of Whirlwind barrel 1 is provided with helical form guiding gutter 6.Air draught is along helical form
Guiding gutter 6 forms eddy flow, and helical form guiding gutter 6 can guide air draught to form strong eddy flow disturbance burning, and can reduce
The axial velocity of eddy flow, improves the coal dust firing time, enhances efficiency of combustion.
Preferably, the toroidal helical passage 5 of upper secondary combustor 2 and the toroidal helical passage 5 of lower secondary combustor 4 in
The angle that portion's main chamber 3 direction tilts is 3 °～20 °.Suitably angle of inclination can make cyclone classified burner reach preferable
The effect of discharge reducing nitrogen oxides.
Preferably, helical form guiding gutter 6, the outlet of toroidal helical passage 5 and spiral are close in the outlet of toroidal helical passage 5
The junction of shape guiding gutter 6 is provided with scuff-resistant coating.Can reduce in air with solid fuel particle to toroidal helical passage 5 He
Helical form guiding gutter 6 abrasion.
Preferably, the cylinder of middle part main chamber 3 includes the first cylinder and and the lower secondary being connected with upper secondary combustor 2
The second cylinder that combustor 4 connects, the first cylinder is up-small and down-big cone barrel, and described second cylinder is up big and down small cone cylinder
Shape.Specifically, the second cylinder of middle part main chamber 3 forms 3 °～the inclination angle of 30 ° with its axis.Middle part main chamber 3
First cylinder is that up-small and down-big cone barrel can stop that the flue gas that the interior burning of middle part main chamber 3 produces the most quickly is arranged
Go out；Second cylinder of middle part main chamber 3 is the centrifugal force that up big and down small cone barrel can improve eddy flow, strengthens burning effect
Really.
Preferably, the top of the cylinder of upper secondary combustor 2 is straight barrel type, and bottom is up big and down small cone barrel, bottom
The cylinder of cone barrel forms 3 °～the inclination angle of 30 ° with the axis of cylinder, and the cylinder of lower secondary combustor 4 is straight barrel type.Top
The cylinder bottom of subsidiary combustion chamber 2 is the centrifugal force that up big and down small cone barrel can improve eddy flow, strengthens combustion efficiency.
Present invention also offers the combustion method of a kind of above-mentioned cyclone classified burner, comprise the following steps:
S1, is passed through with solid fuel to top subsidiary combustion chamber 2, middle part main chamber 3 and lower secondary combustor 4 respectively
The air of grain, specifically, the solid fuel particle of upper secondary combustor 2, middle part main chamber 3 and lower secondary combustor 4 is passed through
Amount ratio is 1:6:3, and the air intake ratio of upper secondary combustor 2, middle part main chamber 3 and lower secondary combustor 4 is 3:
6:1, it is preferable that the ratio of solid fuel particle and the ratio of air intake all can be adjusted between 0.5～1, needs
Illustrating, each ratio of combustor solid fuel particle intake and the ratio of air intake are not limited to aforementioned proportion；
S2, the air with solid fuel particle respectively enters upper secondary combustor 2, middle part master through toroidal helical passage 5
Combustor 3 and lower secondary combustor 4 form fuel gas stream, and fuel gas stream forms eddy flow along helical form guiding gutter 6 and starts burning；
S3, the fuel gas stream of upper secondary combustor 2 and the fuel gas stream of lower secondary combustor 4 are all along helical form guiding gutter 6
Impacting to middle part main chamber 3, the reducibility gas that upper secondary combustor 2 and lower secondary combustor 4 are formed simultaneously is to middle part master
The nitrogen oxides that combustor 3 burning produces reduces；
S4, after having burnt, the flue gas that fuel gas stream burning is formed is discharged by Whirlwind barrel 1 upper end, produces simultaneously
Melt cinder is collected by liquid slag collecting box 7.
In sum, the cyclone classified burner of the present invention, by the way of fuel and air combined fractional combustion, effectively
Reduce the generation of thermal NO.Owing to the diameter of upper secondary combustor 2 and the cylinder of lower secondary combustor 4 is the least
In the diameter of the cylinder of middle part main chamber 3, the air-flow produced in upper subsidiary combustion chamber and lower secondary combustor 4 can combustion main to middle part
Burn room 3 and produce disturbance impact, and the reducibility gas that upper subsidiary combustion chamber and lower secondary combustor 4 produce can be to middle part main chamber
3 burnings produce nitrogen oxides and reduce, and reduce the nitrogen oxides that middle part main chamber 3 produces.It is provided with annular diversion trench accurate
True guided combustion-gas flow flow to track, decrease the axial velocity of eddy flow, improve response time, solid fuel particle
Burn more abundant.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (9)
1. a cyclone classified burner, it is characterised in that include Whirlwind barrel (1) and liquid slag collecting box (7)；
Described Whirlwind barrel (1) is divided into upper secondary combustor (2), middle part main chamber (3) and lower secondary combustor (4), described
The diameter of the cylinder of upper secondary combustor (2) is less than the main combustion in described middle part with the diameter of the cylinder of described lower secondary combustor (4)
Burn the diameter of the cylinder of room (3)；
Described upper secondary combustor (2), middle part main chamber (3) and lower secondary combustor (4) respectively set an air inlet, described in enter
The toroidal helical passage (5) of incision Whirlwind barrel (1) inwall it is equipped with at air port；The annular spiral shell of described upper secondary combustor (2)
The toroidal helical passage (5) of rotation passage (5) and lower secondary combustor (4) all tilts to middle part main chamber (3) direction；
Described liquid slag collecting box (7) is located at the lower end of described Whirlwind barrel (1).
Cyclone classified burner the most according to claim 1, it is characterised in that: set on the inwall of described Whirlwind barrel (1)
There is helical form guiding gutter (6).
Cyclone classified burner the most according to claim 2, it is characterised in that: the annular of described upper secondary combustor (2)
The angle that the toroidal helical passage (5) of helical duct (5) and lower secondary combustor (4) tilts to middle part main chamber (3) direction
It it is 3 °～20 °.
Cyclone classified burner the most according to claim 2, it is characterised in that: the outlet of described toroidal helical passage (5)
Being close to described helical form guiding gutter (6), the outlet of described toroidal helical passage (5) sets with the junction of helical form guiding gutter (6)
There is scuff-resistant coating.
Cyclone classified burner the most according to claim 1, it is characterised in that: the cylinder at described middle part main chamber (3)
Including the first cylinder being connected with upper secondary combustor (2) and the second cylinder being connected with lower secondary combustor (4), described first
Cylinder is up-small and down-big cone barrel, and described second cylinder is up big and down small cone barrel, described first cylinder and the second cylinder
It is connected smoothly.
Cyclone classified burner the most according to claim 5, it is characterised in that: the second of described middle part main chamber (3)
Cylinder forms 3 °～the inclination angle of 30 ° with its axis.
Cyclone classified burner the most according to claim 1, it is characterised in that: the cylinder of described upper secondary combustor (2)
Top be straight barrel type, bottom is up big and down small cone barrel, and the cylinder of lower cone tubular and its axis form 3 °～30 ° incline
Oblique angle, the cylinder of described lower secondary combustor (4) is straight barrel type.
8. the combustion method of a cyclone classified burner as claimed in claim 2, it is characterised in that comprise the following steps:
S1, is passed through with solid fuel to top subsidiary combustion chamber (2), middle part main chamber (3) and lower secondary combustor (4) respectively
The air of granule；
S2, with solid fuel particle air through described toroidal helical passage (5) respectively enter upper secondary combustor (2), in
Portion's main chamber (3) and lower secondary combustor (4) form fuel gas stream, and fuel gas stream forms eddy flow along helical form guiding gutter (6)
Start burning；
S3, the fuel gas stream of upper secondary combustor (3) and the fuel gas stream of lower secondary combustor (4) are all along helical form guiding gutter
(6) impact to middle part main chamber (3), the reducibility gas that upper secondary combustor (3) and lower secondary combustor (4) are formed simultaneously
The nitrogen oxides producing middle part main chamber (3) burning reduces；
S4, after having burnt, the flue gas that fuel gas stream burning is formed is discharged by described Whirlwind barrel (1) upper end, produces simultaneously
Melt cinder by liquid slag collecting box (7) collect.
The combustion method of cyclone classified burner the most according to claim 8, it is characterised in that: described in described step S1
The solid fuel particle intake ratio of upper secondary combustor (2), middle part main chamber (3) and lower secondary combustor (4) is 1:
6:3, air intake ratio is 3:6:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602312.9A CN106247326A (en) | 2016-07-27 | 2016-07-27 | A kind of cyclone classified burner and combustion method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602312.9A CN106247326A (en) | 2016-07-27 | 2016-07-27 | A kind of cyclone classified burner and combustion method thereof |
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| CN106247326A true CN106247326A (en) | 2016-12-21 |
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| CN201610602312.9A Pending CN106247326A (en) | 2016-07-27 | 2016-07-27 | A kind of cyclone classified burner and combustion method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62258902A (en) * | 1986-05-06 | 1987-11-11 | Mitsubishi Heavy Ind Ltd | Burner |
| CN2050929U (en) * | 1989-01-04 | 1990-01-10 | 东北工学院 | Cyclone combustion furnace for coal power |
| CN2051324U (en) * | 1989-08-23 | 1990-01-17 | 北京科技大学 | Liquid-cinder pulverised-coal cyclone combustion apparatus |
| NL1030521C2 (en) * | 2005-11-25 | 2007-05-29 | Cornel Dutescu | Combustion reactor for burning pulverized coal, e.g. for producing electricity, comprises combustion chamber, isotropic outlet nozzle, coal air mixture supply system and natural gas injector with lighter |
| CN203629297U (en) * | 2013-12-20 | 2014-06-04 | 济南大学 | Decomposing furnace structure for low-nitrogen oxide emission |
| CN205919321U (en) * | 2016-07-27 | 2017-02-01 | 北京神雾环境能源科技集团股份有限公司 | Whirlwind fractional combustion ware |
-
2016
- 2016-07-27 CN CN201610602312.9A patent/CN106247326A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62258902A (en) * | 1986-05-06 | 1987-11-11 | Mitsubishi Heavy Ind Ltd | Burner |
| CN2050929U (en) * | 1989-01-04 | 1990-01-10 | 东北工学院 | Cyclone combustion furnace for coal power |
| CN2051324U (en) * | 1989-08-23 | 1990-01-17 | 北京科技大学 | Liquid-cinder pulverised-coal cyclone combustion apparatus |
| NL1030521C2 (en) * | 2005-11-25 | 2007-05-29 | Cornel Dutescu | Combustion reactor for burning pulverized coal, e.g. for producing electricity, comprises combustion chamber, isotropic outlet nozzle, coal air mixture supply system and natural gas injector with lighter |
| CN203629297U (en) * | 2013-12-20 | 2014-06-04 | 济南大学 | Decomposing furnace structure for low-nitrogen oxide emission |
| CN205919321U (en) * | 2016-07-27 | 2017-02-01 | 北京神雾环境能源科技集团股份有限公司 | Whirlwind fractional combustion ware |
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