CN201133645Y - Burner - Google Patents

Abstract

The utility model relates to a combustor, which comprises at least two grades of combustion cylinder and an ignition device that ignite at least the coal powder in the first grade combustion cylinder. Wherein, the flame in the combustion cylinder of the first grade ignites the coal powder in the combustion cylinder of the following grade or further combusts with the supplemented air in the combustion cylinder of the following grade. In addition, the utility model comprises: a first cylinder that supplies coal powder and air flow to at least one grade of combustion cylinder, including the first grade combustion cylinder; a second cylinder that is positioned outside the first cylinder and supplies coal powder and air flow to at lest one grade of combustion cylinder following after the combustion cylinder in the first cylinder; a fist pipe that is connected with the first cylinder and supplies coal powder and air flow to the first cylinder, and; a second pipe that is connected with the second cylinder and supplies coal powder and air flow to the second cylinder. Therefore, the utility model can be adopted to make the ignition easier.

Description

A kind of burner

Technical field

The utility model relates to coal powder burning technology field, relates in particular to a kind of burner.

Background technology

Coal-fired thermal power generation is the main generation mode that present various countries adopt.Igniting is a main aspect of boiler combustion process.Along with the increase of boiler capacity, how to finish the start-up course of boiler fast, economical.It is a significant problem that needs to be resolved hurrily.

Consume for replacing the oil drop fire mode of great amount of fuel oil, development in recent years plasma-ignition technique.

Traditional plasma ignition system has adopted " precombustion chamber " technology in order to light colm.The formation of precombustion chamber is that combustion barrel is incubated, and normally at combustion chamber liner one deck refractory material, by the heating at initial stage, the barrel of precombustion chamber has had very high temperature, helps (even independently) with ignited fuel.Precombustion chamber is grown (about 2m), by isoionic effect, the coal dust that contains in the coal dust air stream that enters precombustion chamber is gasified, generated a large amount of fuel gas, mainly contained CO etc., the heat that discharges when utilizing these gas fuel burnings again removes to light follow-up coal dust, it also is a kind of multistep ignition mode, but because the pre-burning indoor temperature is too high, coal dust is easy to slagging scorification inside, thereby can't continue to use.

For overcoming the problems referred to above, a kind of new fractional combustion barrel structure has been proposed.As shown in Figure 1, this plasma start-up burner comprises the multistage combustion tube, for example (, can also can be less than 4 grades) such as first-stage burning tube 104, second level combustion barrel 106, third level combustion barrel 108, fourth stage combustion barrels 110 more than level Four according to watt level and space size.Be divided into two-way by dividing plate 116 and enter first-stage burning tube 104 and second level combustion barrel 106 respectively from the coal dust air stream (Fig. 1 shown in the broad arrow) that contains that contains that coal dust air inflow aperture 102 enters.Plasma generator is in the axial insertion first-stage burning tube 104 of multistage combustion tube, lighting the coal dust air that contains that enters first-stage burning tube 104 flows, produce one-level pulverized coal flame A, the coal dust air that contains that the latter further lights in the combustion barrel of the second level flows, and forms secondary pulverized coal flame B.Simultaneously, the air stream that enters from air intake 114 (Fig. 1 shown in the narrow arrow) enters third level combustion barrel 108 by the 3rd inlet 120, to the inadequate secondary pulverized coal flame supplemental oxygen of burning, forms three grades of pulverized coal flame C.Air can also enter the further oxygenating of fourth stage combustion barrel by the 4th inlet 122.Meanwhile, air stream flowed in the space between previous stage combustion barrel outer wall and burner urceolus 118 before entering the next stage combustion barrel, thereby had played the effect of cooling combustion tube, prevented slagging scorification.

In above-mentioned technology, plasma generator is along the axial insertion of combustion barrel, and contains coal dust air inflow aperture and air stream all perpendicular to the combustion barrel axis arranged.Just, the direction of plasma flame is perpendicular with the airflow direction that enters the one-level combustion barrel, needs air-flow to be transferred to parallel by adding deflector (not shown).Equally, the direction that second level coal dust enters second level combustion barrel also is vertical with the flame direction that the first-stage burning tube sprays, and it is parallel also to need by deflector it to be become.But owing to be subjected to the restriction in space, deflector can't turn to air-flow fully.Because two strands of air-flows can not be parallel fully, will cause the air-flow that enters that plasma flame (or previous stage flame) is blown partially, thereby make the rising of barrel temperature, make the coal dust slagging scorification.

In addition, in this technology, the coal dust air flows and air stream all is to enter in the direction perpendicular to combustion barrel owing to contain, so on the cross section perpendicular to combustion barrel, the speed of coal dust density and air-flow etc. is not homogeneous, thereby influences burning quality.

Afterwards, be convenient to arrange, used plasma ignition burner as Fig. 2 structure for the scene.For simplicity's sake, only illustrate among the figure and contain coal dust air inflow aperture 102, first-stage burning tube 104, second level combustion barrel 106, overtemperature zone 206 and electric arc 208, and air intake 114, burner urceolus 118 and third level combustion barrel, fourth stage combustion barrel corresponding structure among not shown and Fig. 1.Contain coal dust air stream 210 and be divided into two parts by the barrel of first-stage burning tube after entering inlet 102, middle body enters first-stage burning tube 104, peripheral part enters the mouth before the space between first-stage burning tube and the urceolus (on have contain breeze airflow inlet 102) 202 and then at second of second level combustion barrel and 204 enters second level combustion barrel as shown in the figure, plasma generator 212 is along the radially insertion of burner, and containing coal dust air stream along axially being blown into of combustion barrel, the two remains vertical.Be subjected to containing the effect of coal dust air stream, plasma flame is blown partially, causes the temperature overtemperature that blows inclined to one side side, forms slagging scorification.

Therefore, need a kind of new technology further prevent to burn problem of coal dust slagging scorification on the barrel.

In addition, igniting is become easily, be one of burner problem that will solve always.

In addition, if on traditional burner, use the utility model, there is the problem that cost is reduced.

The utility model content

Therefore, primary and foremost purpose of the present utility model is to provide a kind of igniting more easy burner.

For realizing this purpose, first aspect of the present utility model provides a kind of burner, the igniter that comprises two-stage combustion tube at least and be used for lighting the coal dust in the first-stage burning tube of the described tube of two-stage combustion at least, wherein the combustion flame of upper level combustion barrel is lighted the coal dust in the next stage combustion barrel or is further burnt with the air that replenishes in the next stage combustion barrel, it is characterized in that also comprising: be used for containing first that the coal dust air flows to the combustion barrel of the one-level at least supply that comprises the first-stage burning tube; Outside first, be used for the combustion barrel of one-level at least supply after the combustion barrel in described first of following closely of its inside and contain second of coal dust air stream; First pipe that is connected with first, be used for containing coal dust air stream to described first supply; And second pipe that is connected with second, be used for containing coal dust air stream to described second supply.

On above-mentioned basis, the utility model has further proposed the solution to coal dust slagging scorification problem on the barrel that prevents to burn, promptly, described burner also comprises first bend pipe, described first pipe links to each other with first by first bend pipe, first bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side, and described igniter is inserted the first-stage burning tube along the described first bend pipe wall of axially passing of combustion barrel and first.

Second purpose of the present utility model is to be reduced in the cost when using the utility model on the conventional burners.For this reason, second aspect of the present utility model provides a kind of method of transforming original burner, and described original burner comprises: first, be used to supply air stream and insert igniter; Outside first second is used for supply and contains coal dust air stream, and the described coal dust air stream that contains is lighted by described igniter; And contain coal dust air stream supply pipe, be used for containing coal dust air stream to described second supply; This method comprises: pick out bifurcated pipe from the described coal dust air stream supply pipe that contains, and bifurcated pipe is connected to described first, thereby contain coal dust air stream to described first supply by bifurcated pipe, contain coal dust air stream by the described coal dust air stream supply pipe that contains to described second supply, and layout points fire device flows its coal dust air of lighting in the central tube that contains again, the flame of central tube is further lighted second coal dust air of sending that contains and is flowed, thereby forms the two-stage coal burner.

Description of drawings

Specifically describe the utility model below in conjunction with accompanying drawing.In the accompanying drawing, identical or corresponding technical characterictic uses identical Reference numeral in each figure.

Fig. 1 is the constructed profile of a kind of plasma ignition burner of prior art;

Fig. 2 is the local constructed profile of the another kind of plasma ignition burner of prior art;

Fig. 3 is the local constructed profile of first embodiment of plasma ignition burner of the present utility model;

Fig. 4 is the cutaway view along A-A line among Fig. 3;

Fig. 5 is the local constructed profile of second embodiment of plasma ignition burner of the present utility model;

Fig. 6 is a kind of section of structure of axial eddy vortex burner of prior art.

The specific embodiment

Fig. 3 illustrates the local constructed profile of first embodiment of the plasma ignition burner of the utility model first aspect.For simplicity's sake, this figure equally only shows with Fig. 2 and similarly contains coal dust air inflow aperture 102, first-stage burning tube 104 and second level combustion barrel 106.Because preamble has also been described the multistage combustion barrel structure, also no longer repeat at this.It should be explicitly made clear at this point, as described in the background section, contain the coal dust air flow to into combustion barrel progression, combustion barrel technology that air directly enters and total combustion barrel progression all without limits, can decide according to power requirement and space size, total progression is from secondary to three grade, level Four or more multistagely do not wait, according to the occasion of using, air stream as shown in Figure 1 also can be to contain coal dust air stream.

The direction of insertion that key of the present utility model is to make plasma generator 302 flows to into the direction of first-stage burning tube 104 parallelly with containing the coal dust air, is parallel to the axis of combustion barrel simultaneously.Like this, contain coal dust air stream and be parallel to the combustion barrel axis and enter combustion barrel, can be owing to the inertia that contains coal dust air stream makes the distribution of coal dust on the cross section of combustion barrel asymmetric.Simultaneously, the direction of the emission direction of the plasma flame of plasma generator when containing the coal dust air and flow to into combustion barrel is consistent, is not biased on the burning barrel thereby plasma flame can not blown.More than 2 problems of effectively having alleviated the slagging scorification of burning barrel.

In first embodiment shown in Figure 3, technique scheme is to import the bend pipe 308 contain coal dust air stream and plasma generator 302 is inserted first-stage burning tube 104 along the described bend pipe wall of axially passing of combustion barrel realize by providing.Contain coal dust air stream when the A-A section enters straight combustion barrel for making, the distribution on the cross section is balanced as far as possible and not amesiality because of centrifugal force, and the radian of bend pipe 308 should be tried one's best gently.Yet as long as radian is arranged, always centrifugal force is inevitable, like this, coal dust will be amesiality in combustion barrel.For avoiding this problem, in a kind of preferred implementation,, and make deflector parallel with the plasma generator axis, even extend near first-stage burning tube 104 inlets 310 at the end of combustion barrel one side along the axis arranged deflector 306 of bend pipe 308.Simultaneously, plasma generator 302 and deflector 306 ends all are arranged in (certainly, also can there be certain departing from the position of deflector 306 ends with respect to the combustion barrel axis) on the combustion barrel axis.Like this, deflector 306 has not only changed the flow direction that contains coal dust air stream, makes it parallel with plasma flame, also makes the part Pulverized Coal Concentration near burner axis and plasma flame by means of centrifugation, make the coal powder density that enters central tube improve, help igniting.Compare with structure shown in Figure 1, only use a deflector to change simultaneously to enter the flow direction that contains coal dust air stream of combustion barrels at different levels, simple in structure, resistance is less.Because the space is bigger in the elbow, the shape of bent plate can be flat, also can be various flexure planes (Fig. 4 illustrates an example), further improves the coal powder density that enters central tube.

As shown in Figure 3, plasma generator 302 has to be exposed to greatly and contains in the coal dust air stream.In order to prevent that plasma generator from being contained the wearing and tearing of coal dust air stream, can use abrasionproof sheath (for example ceramic sheath) protection plasma generator.Simultaneously, in order to reduce resistance, forming V-shape can be done in the windward side of sheath.

Said burner is compared with the burner that radially inserts of Fig. 2, except having solved the slagging scorification problem, this burner also has stronger ignition ability, specifically be because: plasma flame is in the center line of burner, because central tube is circular, plasma flame is identical for the ignition ability of all directions, flame is even, transmission capacity is strong, if plasma flame is arranged in a side of burner central tube, then can cause plasma flame one side flame temperature height, the opposite side flame temperature is low, if burning inferior coal, even might be missing of ignition.

In first embodiment of Miao Shuing, the Pulverized Coal Concentration of burner central tube relies on the inspissation of deflector 306 in the bend pipe 308 in front.But owing to be subjected to the restriction in space, and the impossible unlimited raising of the concentration of central tube, this has influenced the effect of igniting.For this reason, as second aspect of the present utility model, provide second embodiment of the present utility model as shown in Figure 5.

For simplicity's sake, Fig. 5 only show with Fig. 2, Fig. 3 in corresponding components first-stage burning tube 104 and burner inner core 202.The same with hereinbefore described embodiment, after first-stage burning tube 104, in burner inner core 202, can arrange more multistage combustion barrel.Outside burner inner core 202, the corresponding component corresponding to the multistage combustion tube after the burner urceolus 118 and burner inner core among Fig. 1, within the burner urceolus 118 can also be arranged.

In this embodiment, the pipeline bifurcated that supply contains coal dust air stream is two pipelines, promptly is responsible for 508 and bifurcated pipe 502.Being responsible for 508 can or adopt the bend pipe 308 in first embodiment to be connected with burner inner core 202 according to traditional approach.Draw central tube 510 from first-stage burning tube 104 simultaneously and be connected to bifurcated pipe 502.Equally, second bend pipe 512 of the bend pipe 308 that being connected of bifurcated pipe 502 and central tube 510 to adopt traditional approach also can adopt to be similar in first embodiment, and wherein also can use the deflector 306 (not shown among Fig. 5) in first embodiment, the arrangement of plasma generator 302 also can be similar to first kind of embodiment.

Like this, directly introduce central tube, enter central tube to enter the coal powder density of first-stage burning tube higher thereby can make, thereby be beneficial to igniting by will contain coal dust air stream with bifurcated pipe.As preferred embodiment, need to regulate the amount that contains coal dust air stream that enters, and/or need to improve the coal powder density in the coal dust air stream of containing that enters plasma pulverized coal ignition burner as far as possible.For this reason, can adjuster be set the person in charge and bifurcated pipe crotch, flexible modulation enters the coal dust amount of bifurcated pipe.

As the modification of such scheme, have more than three grades or three grades if introduce the combustion barrel that contains coal dust air stream in the burner, combustion barrels then at different levels can distribute arbitrarily between central tube and burner inner core.Such as, with three grades of combustion barrels is example, the first-stage burning tube of plasma pulverized coal ignition burner, the coal dust of second level combustion barrel can be introduced (in the case by central tube and bifurcated pipe simultaneously, central tube and internal structure thereof and shown in Figure 2 be similar, only the burner inner core among Fig. 2 becomes the central tube among Fig. 5), the coal dust of third level combustion barrel enters from main line.Also can be conversely, promptly the coal dust of the first-stage burning tube of plasma pulverized coal ignition burner is introduced by central tube and bifurcated pipe, and the coal dust of the second level and third level combustion barrel enters from main line.

In a kind of preferred implementation, a switch 504 can be set in bifurcated pipe.In burner igniting and this switch opens of low-load combustion-stabilizing stage.Igniting is finished, stable this switch 504 of then can closing afterwards of burner combustion.This switch 504 also can be designed as with adjuster 506 and merges, thereby makes adjuster simultaneously as adjuster and bifurcated pipe switch.

In the past in the face of the explanation of second embodiment as can be known, the main points of this embodiment are to utilize bifurcated pipe to improve the coal powder density of first-stage burning tube, are not limited to the plasma generator igniting, it is axial arranged along combustion barrel also to be not limited to plasma generator.Therefore, the each side details of second embodiment can combine or not combination with the each side details of the scheme of first embodiment.Particularly, igniter also can be oil gun except plasma generator, and its arrangement can be the insertion of any direction also except axial insertion, comprises radially inserting and oblique cutting is gone into.

In such scheme, owing to be furnished with bifurcated pipe, and adjuster is housed, can regulate independently and contain coal dust air velocity and coal powder density in the burner central tube, thereby reach optimum igniting operating mode.

In addition,, utilize above-mentioned second embodiment a kind of convenience can be provided, transform means cheaply, make it can use the utility model for being installed in some on-the-spot old-fashioned burner.

For example, the spiral coal powder burner that a lot of coal-fired stations are adopted has central tube, the mixture of coal dust and wind is to send into burner hearth from the skin of central tube, for example promptly adopts this structure by Mitsui Babcock limited energy company in the LNASB axial eddy vortex burner (see figure 6) of the exploitation eighties in 20th century.As shown in Figure 6, this burner comprises central tube 602, drum type body 600, secondary air channel 604, tertiary-air pipe 606, PA/PF pipe 608, flame retainer 610, current collector foundry goods 612, tertiary air rotational flow generator 614.The part of burner between two vertical lines is bellows.Wherein insert oil gun in central tube 602, the oil gun flame ignition is sent into the coal dust of burner hearth from the central tube skin.Center blower fan 616 enters central air hose to 618, wind/coal dusts 601 of central air hose supply center wind, and secondary wind 620 enters behind the secondary air channel 604 through secondary wind swirl vane 622, and tertiary air 624 enters tertiary-air pipe 606 through tertiary air rotational flow generators 614.Need be if directly carry out the transformation of Plasma Firing Technology for the burner of this type with central tube 602 structural demolitions, the coal powder density of burner inside distribution like this, wind speed etc. can great changes will take place, will influence original performance of burner.And adopt second embodiment of the present utility model to get final product head it off, when carrying out the plasma technology transformation, only central tube 602 need be transformed into as shown in Figure 5 first-stage burning tube 104, central tube 510, igniter (for example plasma generator 302), and add that the bifurcated pipe 502 that is attached thereto gets final product, do not need the coal dust air stream mechanism (being that a wind/coal dust shown in Fig. 6 is until the structure of tertiary-air pipe) that contains of original burner is carried out any transformation, thereby accomplished that with former burner performance is consistent to greatest extent.

Above-mentioned reforming mode has formed a kind of three grades of burners (first-stage burning tube, central tube and urceolus).In fact, if situation allows, can not increase the first-stage burning tube, thereby only constitute two stage burner by central tube and urceolus.In addition, in central tube, also can increase more combustion barrel level, perhaps also can in urceolus, increase more combustion barrel level.

In addition, no matter be in original burner, still in the improved burner, igniter can be any igniter, comprises oil gun and plasma igniting device etc.

Above preferred implementation of the present utility model is described in conjunction with the accompanying drawings.Obviously, the utility model is not limited to described detail, and various variations and alternative can be arranged, and these are all within protection domain of the present utility model.

Claims (50)

1. burner, the igniter that comprises two-stage combustion tube at least and be used for lighting the coal dust in the first-stage burning tube of the described tube of two-stage combustion at least, wherein the combustion flame of upper level combustion barrel is lighted the coal dust in the next stage combustion barrel or is further burnt with the air that replenishes in the next stage combustion barrel, it is characterized in that also comprising:

Be used for containing first that the coal dust air flows to the combustion barrel of the one-level at least supply that comprises the first-stage burning tube;

Outside first, be used for the combustion barrel of one-level at least supply after the combustion barrel in described first of following closely of its inside and contain second of coal dust air stream;

First pipe that is connected with first, be used for containing coal dust air stream to described first supply; And

Second pipe that is connected with second, be used for containing coal dust air stream to described second supply.

2. burner as claimed in claim 1, it is characterized in that also comprising first bend pipe, described first pipe links to each other with first by first bend pipe, first bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side, and described igniter is inserted the first-stage burning tube along the described first bend pipe wall of axially passing of combustion barrel and first.

3. burner as claimed in claim 2 is characterized in that also comprising the deflector along the axis arranged of first bend pipe, and deflector is parallel with the axis of igniter at the end of combustion barrel one side.

4. burner as claimed in claim 3 is characterized in that described deflector extends near the inlet of first-stage burning tube.

5. burner as claimed in claim 4 is characterized in that, the end of described igniter and deflector all is arranged on the combustion barrel axis or with respect to combustion barrel journal offset preset distance.

6. as any described burner in the claim 3 to 5, it is characterized in that the shape of cross section of described deflector is flat.

7. burner as claimed in claim 6 is characterized in that, also is provided with the abrasionproof sheath and protects described igniter.

8. burner as claimed in claim 7, the windward side that it is characterized in that described abrasionproof sheath is a V-arrangement.

9. burner as claimed in claim 6 is characterized in that also comprising second bend pipe, and described second pipe links to each other with second by second bend pipe, and second bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side.

10. burner as claimed in claim 6 is characterized in that also comprising the switch in first pipe, is used to allow to contain the coal dust circulation of air and crosses or it is blocked.

11. burner as claimed in claim 6 is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and at the crotch of first pipe and second pipe adjuster is set, and is used to regulate the coal dust amount that enters first pipe and second pipe.

12. burner as claimed in claim 6, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

13. burner as claimed in claim 6 is characterized in that described igniter is an oil gun.

14. burner as claimed in claim 6 is characterized in that described igniter is a plasma generator.

15., it is characterized in that the shape of cross section of described deflector is a flexure plane as any described burner in the claim 3 to 5.

16. burner as claimed in claim 15 is characterized in that, also is provided with the abrasionproof sheath and protects described igniter.

17. burner as claimed in claim 16, the windward side that it is characterized in that described abrasionproof sheath is a V-arrangement.

18. burner as claimed in claim 15 is characterized in that also comprising second bend pipe, described second pipe links to each other with second by second bend pipe, and second bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side.

19. burner as claimed in claim 15 is characterized in that also comprising the switch in first pipe, is used to allow to contain the coal dust circulation of air and crosses or it is blocked.

20. burner as claimed in claim 15 is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and at the crotch of first pipe and second pipe adjuster is set, and is used to regulate the coal dust amount that enters first pipe and second pipe.

21. burner as claimed in claim 15, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

22. burner as claimed in claim 15 is characterized in that described igniter is an oil gun.

23. burner as claimed in claim 15 is characterized in that described igniter is a plasma generator.

24. as any described burner in the claim 2 to 5, it is characterized in that, also be provided with the abrasionproof sheath and protect described igniter.

25. burner as claimed in claim 24, the windward side that it is characterized in that described abrasionproof sheath is a V-arrangement.

26. burner as claimed in claim 25 is characterized in that also comprising second bend pipe, described second pipe links to each other with second by second bend pipe, and second bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side.

27. burner as claimed in claim 25 is characterized in that also comprising the switch in first pipe, is used to allow to contain the coal dust circulation of air and crosses or it is blocked.

28. burner as claimed in claim 25 is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and at the crotch of first pipe and second pipe adjuster is set, and is used to regulate the coal dust amount that enters first pipe and second pipe.

29. burner as claimed in claim 25, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

30. burner as claimed in claim 25 is characterized in that described igniter is an oil gun.

31. burner as claimed in claim 25 is characterized in that described igniter is a plasma generator.

32. as any described burner in the claim 1 to 5, it is characterized in that also comprising second bend pipe, described second pipe links to each other with second by second bend pipe, second bend pipe is parallel to the axis of combustion barrel at an end of described combustion barrel one side.

33. burner as claimed in claim 32 is characterized in that also comprising the switch in first pipe, is used to allow to contain the coal dust circulation of air and crosses or it is blocked.

34. burner as claimed in claim 32 is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and at the crotch of first pipe and second pipe adjuster is set, and is used to regulate the coal dust amount that enters first pipe and second pipe.

35. burner as claimed in claim 32, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

36. burner as claimed in claim 32 is characterized in that described igniter is an oil gun.

37. burner as claimed in claim 32 is characterized in that described igniter is a plasma generator.

38. as any described burner in the claim 1 to 5, it is characterized in that also comprising the switch in first pipe, be used to allow to contain the coal dust circulation of air and cross or it is blocked.

39. burner as claimed in claim 38 is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and at the crotch of first pipe and second pipe adjuster is set, and is used to regulate the coal dust amount that enters first pipe and second pipe.

40. burner as claimed in claim 38, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

41. burner as claimed in claim 38 is characterized in that described igniter is an oil gun.

42. burner as claimed in claim 38 is characterized in that described igniter is a plasma generator.

43. as any described burner in the claim 1 to 5, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, is used to regulate the coal dust amount that enters first pipe and second pipe.

44. burner as claimed in claim 43 is characterized in that described igniter is an oil gun.

45. burner as claimed in claim 43 is characterized in that described igniter is a plasma generator.

46. as any described burner in the claim 1 to 5, it is characterized in that described first pipe and the self-contained coal dust air stream of second pipe house steward pick out, and the crotch at first pipe and second pipe is provided with adjuster, be used to regulate entering first pipe and the coal dust amount of second pipe, and be used for the coal dust air that contains that switch enters first pipe and flow.

47. burner as claimed in claim 46 is characterized in that described igniter is an oil gun.

48. burner as claimed in claim 46 is characterized in that described igniter is a plasma generator.

49., it is characterized in that described igniter is an oil gun as any described burner in the claim 1 to 5.

50., it is characterized in that described igniter is a plasma generator as any described burner in the claim 1 to 5.

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