CN101761924A - 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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- CN101761924A CN101761924A CN200810187917A CN200810187917A CN101761924A CN 101761924 A CN101761924 A CN 101761924A CN 200810187917 A CN200810187917 A CN 200810187917A CN 200810187917 A CN200810187917 A CN 200810187917A CN 101761924 A CN101761924 A CN 101761924A
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- 239000003245 coal Substances 0.000 title claims abstract description 156
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 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
- 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
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010992 reflux Methods 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, the coal burner of particularly a kind of Pulverized Coal Concentration device and this device of application.
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 form specific deep or light stalling characteristic near burner inside and spout.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 is different separates and concentrate, have the limited shortcoming of space layout.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 complexity causes the coal dust deposition easily, and exist separate and concentrated effect poor, the gas channel resistance is 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 obtain to separate preferably and concentrated effect to solid-fuelled deep or light separation the time, 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 as follows:
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, described main body comprises windward side 2 and lee face 3;
Have at least one pod apertures 4 between the windward side 2 of described main body 1 and the lee face 3.
Wherein, the cross sectional shape of described pod apertures 4 comprises rule or irregularly shaped arbitrarily.
Wherein, described pod apertures 4 is parallel with horizontal line or tilt, between described 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 described all pod apertures 4 and described windward side 2 is between 2: 10 to 7: 10.
Wherein, described windward side 2 is concave curvatures or shape linear pattern inclined-plane, abrupt slope.
Wherein, described 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, described incendiary source 11 is positioned at central tube 14, described central tube 14, inner sleeve at different levels 13 and urceolus 12 coaxial arrangement, 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 by back-up block 15 connections and fixing.
Wherein, described coal burner barrel comprises with one of upper/lower positions or combination arbitrarily: central tube barrel, inner sleeve barrel at different levels, urceolus barrel.
Wherein, continuous or discontinuous being arranged on the coal burner barrel of described Pulverized Coal Concentration device.
Wherein, described 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, so that in deep or light separation, not only can obtain to separate with concentrated effect preferably but also do not produce excessive resistance.In addition, because the existence of pod apertures is convenient to adjust the Pulverized Coal Concentration device size neatly in the certain specification scope, 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, apparently, 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, 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 schematic diagram of Pulverized Coal Concentration device on another coal burner according to the embodiment of the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, 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 belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, it is a kind of Pulverized Coal Concentration apparatus structure schematic diagram 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, described 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 as 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 determine according to the required Pulverized Coal Concentration degree that reaches; The position of described pod apertures 4 is the penetration site of described pod apertures 4 relative windward sides 2, and the specification of described 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 described 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, described windward side 2 can be a concave curvatures, and as 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, described abrupt slope can be between 40 °~75 °.
Wherein, described 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 as follows:
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 by burner cylindrical shell Pulverized Coal Concentration at different levels device, realization radially outward reduces resistance gradually along burner center cylindrical shells at different levels, 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 adjust, 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) by 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) under a main wind concentrated phase area fluid carries help with the pod apertures jet, form longly apart from the eddy current air cushion, promote the suspension of solid fuel particle, generate the very stable high concentration wind powder air-flow in kernel of section zone;
2) vortex of extending behind the Pulverized Coal Concentration device 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 enters burner cylindrical shell 8, when wind powder mixture 5 during near burner incendiary source 11, wherein the pulverized coal particle that 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 middle zone by primary air then; 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.
As seen, 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 be formed centrally coal dust concentrated phase area 7 in combustion barrel.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 schematic diagram of thin powdered coal all around.According to the structure difference and the position difference of Pulverized Coal Concentration device in burner of Pulverized Coal Concentration device, what can also form other dense, lightly distributes 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, described incendiary source 11 is positioned at central tube 14, described 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 with one of upper/lower positions or any combined location: 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, described 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, at the Pulverized Coal Concentration device for being provided with continuously or during discontinuous the setting, the Pulverized Coal Concentration device can be evenly at interval or non-uniform spacing be arranged on the coal burner barrel.
The cross sectional shape of described 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 determine according to actual conditions when specifically using.
Combustion barrel resistances at different levels, reduce to urceolus step by step from central tube, 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 connect and fixing with back-up block 15, and 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 is provided with continuous Pulverized Coal Concentration device on multistage barrel (central tube and inner sleeve at different levels), 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 multi-turn 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, but 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 the new burner apparatus of the air duct in turbulent burner center most, also can be used for the transformation and the 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 be remaining some or all in the barrel continuous Pulverized Coal Concentration device is 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; For volatile matter height, caloric value height, ash content, the fat coal that moisture is low must appropriateness reduce deep or light separating effect, and consider the characteristics of easy scaling loss of spout and slagging scorification, need to strengthen the rigidity and the local temperature controlling of 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 enters 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 fixedlyed connected with burner barrel 18 by back-up block 15, and the wind powder mixture of process Pulverized Coal Concentration device 16 enters burner hearth 19.
In the present embodiment, wind powder mixture enters 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 by 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 preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. a Pulverized Coal Concentration device is used to realize solid-fuelled deep or light separation, it is characterized in that, comprising: have the main body (1) of space geometry structure, described main body comprises windward side (2) and lee face (3);
Have at least one pod apertures (4) between the windward side (2) of described main body (1) and the lee face (3).
2. Pulverized Coal Concentration device according to claim 1 is characterized in that, the cross sectional shape of described pod apertures (4) comprises rule or irregularly shaped arbitrarily.
3. Pulverized Coal Concentration device according to claim 1 is characterized in that, described pod apertures (4) is parallel with horizontal line or tilt, between described pod apertures (4) and the horizontal line scope at angle of inclination be ± 80 ° between.
4. Pulverized Coal Concentration device according to claim 1 is characterized in that, the ratio of the gross area of the hole area of described all pod apertures (4) and described windward side (2) is between 2: 10 to 7: 10.
5. Pulverized Coal Concentration device according to claim 1 is characterized in that, described windward side (2) are concave curvatures or shape linear pattern inclined-plane, abrupt slope.
6. Pulverized Coal Concentration device according to claim 1 is characterized in that, described lee face (3) is for forming long plane or curved surface apart from eddy current.
7. coal burner, comprise: incendiary source (11), urceolus (12), inner sleeve at different levels (13), central tube (14) and back-up block (15), described incendiary source (11) is positioned at central tube (14), described central tube (14), inner sleeve at different levels (13) and urceolus (12) coaxial arrangement, amplify step by step in the cross section, and by back-up block (15) connection and fixing, it is characterized in that, also comprise the Pulverized Coal Concentration device (16) that is set on the coal burner barrel.
8. coal burner according to claim 7 is characterized in that, described coal burner barrel comprises with one of upper/lower positions or combination arbitrarily: central tube barrel, inner sleeve barrel at different levels, urceolus barrel.
9. according to claim 7 or 8 described coal burners, it is characterized in that continuous or discontinuous being arranged on the coal burner barrel of described Pulverized Coal Concentration device.
10. coal burner according to claim 7 is characterized in that, described Pulverized Coal Concentration device is on the same cross section of coal burner barrel, or on different cross sections.
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CN102454987A (en) * | 2010-11-01 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with the same |
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2008
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102454987A (en) * | 2010-11-01 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with the same |
CN102454987B (en) * | 2010-11-01 | 2014-12-31 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with the same |
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CN101761924B (en) | 2012-08-29 |
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