CN101761924B - Pulverized coal concentrator and pulverized coal burner applying same - Google Patents
Pulverized coal concentrator and pulverized coal burner applying same Download PDFInfo
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- CN101761924B CN101761924B CN200810187917A CN200810187917A CN101761924B CN 101761924 B CN101761924 B CN 101761924B CN 200810187917 A CN200810187917 A CN 200810187917A CN 200810187917 A CN200810187917 A CN 200810187917A CN 101761924 B CN101761924 B CN 101761924B
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- 239000003245 coal Substances 0.000 title claims abstract description 154
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000004449 solid propellant Substances 0.000 abstract description 2
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 20
- 239000000843 powder Substances 0.000 description 15
- 239000002817 coal dust Substances 0.000 description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a pulverized coal concentrator used for realizing concentration and dilution separation of solid fuel, which comprises a main body (1) with a spacial geometrical structure; the main body comprises a windward side (2) and a leeward side (3); and at least one deflector hole (4) is formed between the windward side (2) and the leeward side (3) of the main body (1). Because a principle of concentration impact guided separation is applied, the resistance is obviously reduced, and the size of the pulverized coal concentrator is conveniently adjusted flexibly in a certain specification range. The invention also discloses a pulverized coal burner applying the pulverized coal concentrator.
Description
Technical field
The present invention relates to the coal burner technical field, particularly a kind of Pulverized Coal Concentration device and the coal burner of using this device.
Background technology
In order to reach smooth combustion and to reduce the purpose that nitrogen oxide (NOx) generates, the coal burner of coal-burning boiler generally can adopt the Pulverized Coal Concentration device, makes coal dust near burner inside and spout, form specific deep or light stalling characteristic.The quality of Pulverized Coal Concentration device performance can directly have influence on the overall performance of coal burner.The Pulverized Coal Concentration device that the gas that the conventional pulverized-coal boiler is used, fixed double phase flow separate generally adopts elbow and shutter.Wherein, elbow structure be utilize coal dust particle when the elbow because the inertia of gas, fixed double phase flow difference is separated and is concentrated, have the limited shortcoming of spatial placement.Venetian blind type gas, fixed double phase flow separate and enrichment facility is that a plurality of concentrated grid are set in combustion barrel, and this apparatus structure complicacy causes the coal dust deposition easily, and exist and separate with concentrated effect poorly, and the gas channel resistance greatly and the shortcoming of abrasion resistance difference.
Summary of the invention
The embodiment of the invention is to provide a kind of Pulverized Coal Concentration device on the one hand, both can to solid-fuelled deep or light separation the time, obtain to separate preferably and concentrated effect, can reduce resistance again, increases wear resistence.
The embodiment of the invention is to provide a kind of coal burner on the other hand, to obtain littler burning resistance, and ignition performance and surely combustion effect preferably.
For this reason, the technical scheme that provides of the embodiment of the invention is following:
A kind of Pulverized Coal Concentration device that the embodiment of the invention provides is used to realize solid-fuelled deep or light separation, comprising: have the main body 1 of space geometry structure, said main body comprises windward side 2 and lee face 3;
Have at least one pod apertures 4 between the windward side 2 of said main body 1 and the lee face 3.
Wherein, the cross sectional shape of said pod apertures 4 comprises rule or irregularly shaped arbitrarily.
Wherein, said pod apertures 4 is parallel with horizontal line or tilt, between said pod apertures 4 and the horizontal line scope at angle of inclination be ± 80 ° between.
Wherein, the ratio of the gross area of the hole area of said all pod apertures 4 and said windward side 2 is between 2: 10 to 7: 10.
Wherein, said windward side 2 is concave curvatures or shape linear pattern inclined-plane, abrupt slope.
Wherein, said lee face 3 is for forming long plane or curved surface apart from eddy current.
A kind of coal burner that the embodiment of the invention provides; Comprise: incendiary source 11, urceolus 12, inner sleeve at different levels 13, central tube 14 and back-up block 15; Said incendiary source 11 is positioned at central tube 14, said central tube 14, inner sleeve at different levels 13 and urceolus 12 coaxial arrangement, and amplify step by step in the cross section; And, also comprise the Pulverized Coal Concentration device 16 that is set on the coal burner barrel through back-up block 15 connections and fixing.
Wherein, said coal burner barrel comprises with one of upper/lower positions or combination in any: central tube barrel, inner sleeve barrel at different levels, urceolus barrel.
Wherein, continuous or discontinuous being arranged on the coal burner barrel of said Pulverized Coal Concentration device.
Wherein, said Pulverized Coal Concentration device is on the same cross section of coal burner barrel, or on different cross sections.
Use the disclosed Pulverized Coal Concentration device that has pod apertures of the embodiment of the invention; Because it has used concentrated bump guiding separation principle; On the Pulverized Coal Concentration device, be provided with special pod apertures; Resistance is significantly reduced,, not only can obtain to separate with concentrated effect preferably but also do not produce excessive resistance so that in deep or light separation.In addition, because the existence of pod apertures is convenient in the certain specification scope, adjust the Pulverized Coal Concentration device size neatly, comprise height and width etc.Have again; Because the embodiment of the invention provides the Pulverized Coal Concentration device more abundant than shutter and concentrated ring structure, and is directly fixed on barrel, thereby wear resistance is very good; Also taken into account simultaneously the problem of expansion aspect, it is had longer service life under the identical materials condition.
Use the disclosed Pulverized Coal Concentration device coal burner that has of the embodiment of the invention; Since combustion barrel resistances at different levels from central tube to urceolus; Reduce step by step, thereby make Dual-Phrase Distribution of Gas olid wind powder mixture flow velocity increase step by step to urceolus, and have less burner drag overall from central tube; Slagging scorification be can also prevent, igniting and steady combustion helped.Because the perturbation action of the pod apertures air-flow of Pulverized Coal Concentration device, can produce the entrainmenting of flame edge, turbulent flow is laterally pulsed, thereby make catch fire rapidly, stable, and, can reduce NO effectively because coal dust forms deep or light distribution
X
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 (a) is the front view according to a kind of Pulverized Coal Concentration device of the embodiment of the invention;
Fig. 1 (b) is the left view of Pulverized Coal Concentration device shown in Fig. 1 (a);
Fig. 2 is the principle schematic according to the realization coal powder light-dark separation of the embodiment of the invention;
Fig. 3 (a) is the side view according to a kind of coal burner of the embodiment of the invention;
Fig. 3 (b) is the front view of burner shown in Fig. 3 (a);
Fig. 4 (a) is the side view according to the another kind of coal burner of the embodiment of the invention;
Fig. 4 (b) is the front view of burner shown in Fig. 4 (a);
Fig. 5 (a) is the side view according to another coal burner of the embodiment of the invention;
Fig. 5 (b) is the front view of burner shown in Fig. 5 (a);
Fig. 6 is the application sketch map of Pulverized Coal Concentration device on another coal burner according to the embodiment of the invention.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1, it is a kind of Pulverized Coal Concentration apparatus structure sketch map according to the embodiment of the invention, and wherein Fig. 1 (a) is a front view; Fig. 1 (b) is a left view.The described Pulverized Coal Concentration device of the embodiment of the invention is used to realize solid-fuelled deep or light separation, and it comprises: have the main body 1 of space geometry structure, said main body comprises windward side 2 and lee face 3; Have at least one pod apertures 4 between the windward side 2 of main body 1 and the lee face 3, that is to say, can have one or more pod apertures 4.In Pulverized Coal Concentration device shown in Figure 1, windward side 2 is a curved surface, and lee face 3 is a vertical plane, has a pod apertures 4 between the windward side 2 of main body 1 and the lee face 3.
Can there be multiple shape in the cross section of above-mentioned pod apertures 4, comprises the shape of rule arbitrarily, and is like circle, rectangle etc., perhaps, irregularly shaped arbitrarily.Pod apertures 4 can parallelly also can tilt with horizontal line, and the scope at angle of inclination can be between ± 80 ° between pod apertures 4 and the horizontal line, as can be ± 70 °, ± 60 °, ± 50 °, ± 40 °, ± 30 ° ± 20 °, ± 10 ° or the like.
The position of above-mentioned pod apertures 4 and specification, relevant with ature of coal with the burner that is adopted, and, can confirm according to the required Pulverized Coal Concentration degree that reaches; The position of said pod apertures 4 is the penetration site of said pod apertures 4 relative windward sides 2, and the specification of said pod apertures 4 comprises the angle of pod apertures 4, the shape in hole and the quantity in hole etc.
The ratio of the gross area of the hole area of above-mentioned all pod apertures 4 and said windward side 2 is between 2: 10 to 7: 10, that is to say, the hole gross area of pod apertures 4 accounts for 20%～70% of the total front face area of Pulverized Coal Concentration device.
Wherein, said windward side 2 can be a concave curvatures, and like hyperbolic-type, parabolic type, circular arc line style or the like, windward side 2 can also be shape linear pattern inclined-plane, abrupt slope.The angle of inclination on shape linear pattern inclined-plane, said abrupt slope can be between 40 °～75 °.
Wherein, said lee face 3 is for forming long plane or curved surface apart from eddy current.In most cases optimal way is a vertical plane.
The main effect of pod apertures is following:
1) passes through from pod apertures owing to a part contains the less air-flow of powder, can promote the deep or light separation of Dual-Phrase Distribution of Gas olid;
2) pod apertures and the arrangement through burner cylindrical shell Pulverized Coal Concentration at different levels device; Cylindrical shells at different levels radially outward reduce resistance gradually along the burner center in realization; Therefrom mind-set progressively increases wind speed outward, reduces the flow velocity of burner cylindrical shell center Dual-Phrase Distribution of Gas olid jet;
3) air-flow purges the Pulverized Coal Concentration device back side, thereby prevents slagging scorification;
4) the Pulverized Coal Concentration device size is easy to adjustment; If the excessive resistance that will inevitably cause of Pulverized Coal Concentration device size is excessive; And owing to offered pod apertures on the Pulverized Coal Concentration device; Thereby reduced resistance, thereby can the Pulverized Coal Concentration device resistance of prior art and the contradiction between the deep or light separating effect have been overcome so that the volume adjustable extent of Pulverized Coal Concentration device becomes big;
5) pod apertures reduces circulating resistance, and Pulverized Coal Concentration device fluid balance ability is strengthened;
6) the flow-disturbing whirlpool that forms at Pulverized Coal Concentration device rear portion under the leader tape effect of pod apertures jet, forms the cushioning effect of long distance, eliminates solid particle secondary settlement and diffusion;
7) for the internal combustion burner of fractional combustion, in an organized way set up flame edge layer turbulent flow pulsation along each layer of burner barrel, strengthen the steady combustion effect of catching fire of lighting step by step between the later stage flame;
8) through effective tissue, make each section of burner fractional combustion and deep or light separation degree adapt to general mood, fixed double phase flow;
9) the pod apertures jet of relative low temperature can cool off the cylindrical shell wall well to some extent, reduces the scaling loss distortion;
10) pod apertures jet central gas fixed double phase flow and the metal barrel that bulky grain is more relatively isolated, and reduces the direct wearing and tearing of high concentration bulky grain to higher temperature metal wall.
Mainly acting as of lee face:
1) carries under the help with the pod apertures jet at a main wind concentrated phase area fluid, form longly, promote the suspension of solid fuel particle, generate the very stable high concentration wind powder air-flow in kernel of section zone apart from the eddy current air cushion;
The vortex of 2) behind the Pulverized Coal Concentration device, extending is concentrated the concentration of coal dust; Therefore the primary air flow by the heating of low-power burning things which may cause a fire disaster reduces; Total ignition heat effective rate of utilization greatly strengthens, and forms the pilot flame of stablizing a time that amplifies, and forms internal combustion type pulverized coal burner core flame;
3) in internal combustion burner cylindrical shells at different levels, form the efficient hot flue gas hot reflux in flame downstream, produces stable next stage coal flame incendiary source, make cold airflow zone that the back do not catch fire " shielding " with it to some extent simultaneously, realization is surely fired step by step.
Referring to Fig. 2, it is that the Pulverized Coal Concentration device that provides according to the embodiment of the invention is realized the principle schematic that coal powder light-dark separates.Wind powder mixture 5 gets into burner cylindrical shell 8; When wind powder mixture 5 during near burner incendiary source 11; The pulverized coal particle that wherein inertia is stronger can be curved surface or the separation of the windward side of facing directly 2 water conservancy diversion after colliding; Launch Pulverized Coal Concentration device top, brought into burner cylindrical shell 8 by primary air then and lean on middle zone; And the very little air of its lingering remnants of past customs powder content passes pod apertures 4, thereby forms deep or light separation, and can control the central area wind speed.Moreover, because the pressure balance effect of pod apertures, produce and have very little circulating resistance under the equal concentrated effect, solved the contradiction between deep or light separation and primary air velocity, the resistance, generation simultaneously prevents a series of good effects such as slagging scorification.
It is thus clear that the structure of the anterior windward side 2 of Pulverized Coal Concentration device can effectively be eliminated the anterior vortex of Pulverized Coal Concentration device, and in combustion barrel, be formed centrally coal dust concentrated phase area 7.The bluff body structure of Pulverized Coal Concentration device lee face 3 perforation, it is local along the very long stream swirl district 6 of journey that Pulverized Coal Concentration device rear portion is formed, and reduces the deposition once again of later stage concentrated phase area coal dust, keeps the higher breeze airflow of density that good effect is arranged to long distance.In addition, because the perturbation action of pod apertures air-flow, can produce the entrainmenting of central area flame edge, turbulent flow is laterally pulsed, and improves the pulverized coal ignition effect effectively.Principle schematic shown in Figure 2 provides is that burner forms center thick coal culm, the sketch map of thin powdered coal all around.Different according to the structure difference of Pulverized Coal Concentration device and the position of Pulverized Coal Concentration device in burner, can also form the dense, light of other and distribute mutually, such as the center be the thin powdered coal district, all around for the thick coal culm district etc.
Introduce the coal burner that uses above-mentioned Pulverized Coal Concentration device below.
The coal burner that the embodiment of the invention provides; Comprise: incendiary source 11, urceolus 12, inner sleeve at different levels 13, central tube 14 and back-up block 15, said incendiary source 11 is positioned at central tube 14, said central tube 14, inner sleeve at different levels 13 and urceolus 12 coaxial arrangement; Amplify step by step in the cross section; And, wherein, also comprise the Pulverized Coal Concentration device 16 that is set on the coal burner barrel with back-up block 15 connections and fixing.
Above-mentioned coal burner barrel comprises the position with one of upper/lower positions or combination in any: central tube 14 barrels, inner sleeve at different levels 13 barrels, urceolus 12 barrels; Wherein, central tube 14 barrels, inner sleeve at different levels 13 barrels comprise the wind powder gateway place barrel and the barrel of other positions in addition; The urceolus barrel comprises the wind powder porch barrel of coal burner, the spout place barrel of coal burner and other position barrels except that above-mentioned two places.
Above-mentioned Pulverized Coal Concentration device can continuous or discontinuous being arranged on the coal burner barrel.For being provided with continuously or during discontinuous the setting, said Pulverized Coal Concentration device can be on the same cross section of coal burner barrel at the Pulverized Coal Concentration device, or on different cross sections.And for being provided with continuously or during discontinuous the setting, Pulverized Coal Concentration device evenly interval or non-uniform spacing is arranged on the coal burner barrel at the Pulverized Coal Concentration device.
The cross sectional shape of said coal burner barrel can be circle, or is rectangle, or a part is that a circular part is rectangle.
Above-mentioned coal burner central tube incendiary source distance of Pulverized Coal Concentration device in the central tube can the based on fuel characteristic design, and can confirm according to actual conditions when specifically using.
Combustion barrel resistances at different levels, reduce to urceolus from central tube step by step, thereby make Dual-Phrase Distribution of Gas olid wind powder mixture flow velocity increase step by step to urceolus from central tube, and have less burner drag overall; Slagging scorification be can also prevent, igniting and steady combustion helped.Because the perturbation action of the pod apertures air-flow of Pulverized Coal Concentration device, can produce the entrainmenting of flame edge, turbulent flow is laterally pulsed, thereby make catch fire rapidly, stable, and, can reduce NO effectively because coal dust forms deep or light distribution
X
Referring to Fig. 3, it is the structure chart according to a kind of coal burner of the embodiment of the invention, and wherein, Fig. 3 (a) is a side view, Fig. 3 (b) front view.In the present embodiment, central tube 14, inner sleeve at different levels 13 and urceolus 12 coaxial arrangement, amplify step by step in the cross section, and with back-up block 15 connections and fixing, Pulverized Coal Concentration device 16 is continuous being set on the coal burner barrel.
The cross section of coal burner barrel shown in Figure 3 is circle, and on multistage barrel (central tube and inner sleeve at different levels), is provided with continuous Pulverized Coal Concentration device, and continuous Pulverized Coal Concentration device can certainly only be set on the single-stage barrel.In this example, the continuous Pulverized Coal Concentration device that is provided with on each circumference barrel can also can be many circles for a circle.The burner of this kind structure is suitable for the burner of most of meager coals or brown coal.Continuous Pulverized Coal Concentration apparatus structure is convenient to form more the axial centre high concentration of the concentrating zone of igniting, and ignition smooth combustion trend is better step by step, but the core space ignition temperature is high slightly.Over distance dense powder jet flame in this kind center is splendid to the next stage coal dust effect of igniting; Be very suitable for a wind combustor structure of meager coal and brown coal; Shortcoming is that the pressure loss is more bigger; But much smaller than other a similar wind combustor structure with deep or light centrifugation, outlet jet rigidity is not too high, and blast has some losses.
Referring to Fig. 4, it is the structure chart according to the another kind of coal burner of the embodiment of the invention, and wherein, Fig. 4 (a) is a side view, and Fig. 4 (b) is a front view.Itself and difference embodiment illustrated in fig. 3 are that Pulverized Coal Concentration device 16 is discontinuous being set on the coal burner barrel.The burner that has this Pulverized Coal Concentration apparatus structure; Though concentrated effect and jet rectification effect are general, relatively play the burner that other types concentrate mode, can satisfy the ignition condition of bituminous coal; And has higher rigidity; Resistance is less, can reach the good steady combustion effect of catching fire, and avoids the overheated and dilatancy of cylindrical shell.The burner of type shown in Figure 4 is suitable for the transformation and new burner apparatus of the air duct in turbulent burner center most, also can be used for the transformation and new burner apparatus of DC burner.
Need to prove,, discontinuous Pulverized Coal Concentration device can be set on single-stage or multistage combustion tube for coal burner shown in Figure 4.Discrete Pulverized Coal Concentration device can all be installed on all barrels, also can on the part barrel, be provided with.When on the part barrel, having the Pulverized Coal Concentration device of discontinuous setting, can in remaining some perhaps whole barrel, continuous Pulverized Coal Concentration device be set.The Pulverized Coal Concentration device of discontinuous installation on each barrel can be on same circumferential section, also can be on different circumferential sections.
Referring to Fig. 5, it is the structure chart according to another coal burner of the embodiment of the invention, and wherein, Fig. 5 (a) is a side view, and Fig. 5 (b) is a front view.Itself and difference embodiment illustrated in fig. 3 be, the cross sectional shape of coal burner barrel is rectangle, and Pulverized Coal Concentration device 16 is continuous being set on single of coal burner barrel.This type of burner is applicable to DC burner transformation or new burner apparatus; Because peripheral light phase region and the central area is a concentrated phase area; The weak burning things which may cause a fire disaster ignition condition in the center of can realizing preferably, and approach the situation of surrounding air, the adherent slagging scorification or the air-flow scattering that are difficult for producing water-cooling wall for both sides.The jet of pod apertures can be wrapped in spout flame well, makes that the rectification effect of a wind is better, and the wind rigidity in spout place is higher, also can adapt to the burner of internal combustion type fractional combustion.
This arrangement can be done local adjustment, the raising cocnentration factor of coal difference according to the coal condition; High for volatile matter, caloric value is high, ash content, the fat coal that moisture is low must appropriateness reduce deep or light separating effect, and consider that spout is prone to the characteristics of scaling loss and slagging scorification, needs the rigidity and the local temperature controlling of reinforcement jet.
Need to prove,, can on single-stage or multistage combustion tube single or a plurality of, continuous or discontinuous Pulverized Coal Concentration device be set for coal burner shown in Figure 5.The Pulverized Coal Concentration device of installing on each barrel can be symmetrical, also can be asymmetric, and the Pulverized Coal Concentration device of single installation of each barrel can also can be many rows for a row.
Referring to Fig. 6, it is the structure chart according to another coal burner of the embodiment of the invention.Wind powder mixture gets into burner from elbow 20; Be provided with the Pulverized Coal Concentration device 16 of pod apertures 4 in the burner barrel 18; This Pulverized Coal Concentration device 16 is fixedly connected with burner barrel 18 through back-up block 15, through the wind powder mixture entering burner hearth 19 of Pulverized Coal Concentration device 16.
In the present embodiment; Wind powder mixture gets into burner from elbow 20; When passing through Pulverized Coal Concentration device 16 with holes, because the guide functions of Pulverized Coal Concentration device 16, most of coal dust is from passing through to form concentrated phase area near the burner barrel; Therefrom the heart is through forming light phase region for air-flow and a small amount of coal dust, and also promptly the formation center is thin powdered coal, is the deep or light separation of thick coal culm all around.In addition, because the perturbation action of pod apertures air-flow, can produce the entrainmenting of flame edge, turbulent flow is laterally pulsed.Thereby make when coal dust sprays into burner hearth 19, can accept radiation of burner hearth heat fast, catch fire rapidly, and, can reduce NOx effectively because coal dust forms deep or light distribution.
Need to prove that Pulverized Coal Concentration device shown in Figure 6 can be installed near the burner nozzle 21 or other positions in the burner barrel.
More than be the explanation that the Pulverized Coal Concentration device is used for coal burner, it also might be used as common pulverized coal channel and makees enrichment facility for Pulverized Coal Concentration device as herein described, and concrete the application is not limited thereto.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (4)
1. coal burner; Comprise: incendiary source (11), urceolus (12), inner sleeve at different levels (13), central tube (14) and back-up block (15), said incendiary source (11) is positioned at central tube (14), said central tube (14), inner sleeve at different levels (13) and urceolus (12) coaxial arrangement; Amplify step by step in the cross section; And connect and fixing through back-up block (15), it is characterized in that, comprise that also being set at being used on the coal burner barrel realizes the Pulverized Coal Concentration device (16) of solid-fuelled deep or light separation;
Wherein, said Pulverized Coal Concentration device (16) comprising:
Main body (1) with space geometry structure, said main body comprise windward side (2) and lee face (3);
Have at least one pod apertures (4) between the windward side (2) of said main body (1) and the lee face (3);
Said windward side (2) is concave curvatures or shape linear pattern inclined-plane, abrupt slope;
Said lee face (3) is for forming long plane or curved surface apart from eddy current; And
Continuous or discontinuous being arranged on the coal burner barrel of said Pulverized Coal Concentration device (16) makes the windward side (2) of Pulverized Coal Concentration device (16) towards coal burner tube center, thereby coal burner tube periphery is a concentrated phase area for light phase region, center.
2. coal burner according to claim 1 is characterized in that, the ratio of the gross area of the hole area of all pod apertures (4) and said windward side (2) is between 2: 10 to 7: 10.
3. coal burner according to claim 1 is characterized in that, said Pulverized Coal Concentration device (16) is set at on one of upper/lower positions or a plurality of positions with the combination in any of upper/lower positions: central tube barrel, inner sleeve barrel at different levels, urceolus barrel.
4. coal burner according to claim 1 is characterized in that, said Pulverized Coal Concentration device is on the same cross section of coal burner barrel, or on different cross sections.
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| CN200810187917A CN101761924B (en) | 2008-12-23 | 2008-12-23 | Pulverized coal concentrator and pulverized coal burner applying same |
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| CN200810187917A CN101761924B (en) | 2008-12-23 | 2008-12-23 | Pulverized coal concentrator and pulverized coal burner applying same |
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| CN101761924B true CN101761924B (en) | 2012-08-29 |
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| CN2172403Y (en) * | 1993-04-06 | 1994-07-20 | 练敬忠 | Turbulent powdered coal burner |
| EP0711952A3 (en) * | 1994-11-14 | 1997-10-22 | Mitsubishi Heavy Ind Ltd | Pulverized coal combustion burner |
| CN2415255Y (en) * | 2000-04-14 | 2001-01-17 | 华中理工大学 | Blunt body burner with fairing holes |
| CN2779250Y (en) * | 2005-01-21 | 2006-05-10 | 周荣贵 | Cellular multi-stage rotary flow coal burner |
| CN101294705A (en) * | 2007-04-25 | 2008-10-29 | 烟台龙源电力技术股份有限公司 | Highly effective internal combustion type pulverized coal burner with ignition source |
| CN201355036Y (en) * | 2008-12-23 | 2009-12-02 | 烟台龙源电力技术股份有限公司 | Pulverized coal enrichment device and pulverized coal burner applying same |
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| CN101761924A (en) | 2010-06-30 |
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