CN102679337B - Cyclone combustor with adjustable flame shape and mixing strength - Google Patents

Cyclone combustor with adjustable flame shape and mixing strength Download PDF

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Publication number
CN102679337B
CN102679337B CN201210158297.5A CN201210158297A CN102679337B CN 102679337 B CN102679337 B CN 102679337B CN 201210158297 A CN201210158297 A CN 201210158297A CN 102679337 B CN102679337 B CN 102679337B
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China
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adjustable
air
enlarging
ring
tooth
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CN102679337A (en
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周屈兰
罗睿
李娜
章娅菲
付加鹏
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Xian Jiaotong University
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Xian Jiaotong University
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Abstract

The invention provides a cyclone combustor with adjustable flame shape and mixing strength, comprising a central air pipe, a primary air duct, an inner secondary air duct and an outer secondary air duct from inside to outside, wherein an adjustable outer primary air flaring is arranged at the inner side of an outlet of the inner secondary air duct; an adjustable inner secondary air flaring is arranged at the inner side of an outlet of the outer secondary air duct; an adjustable inner tooth-shaped ring is arranged on the central air pipe and an adjustable outer tooth-shaped ring is arranged on a separation plate of the primary air duct; the size of a flaring angle of the adjustable outer primary air flaring and/or the adjustable inner secondary air flaring can be adjusted by axial movement of an outer primary air flaring pull rod and an inner secondary air flaring pull rod, so as to realize the outer flame shape of a combustor nozzle; and axial movement matching and peripheral rotation matching of inner and outer tooth-shape rings are realized through an inner tooth-shaped ring pull rod and an outer tooth-shaped ring pull rod, so as to realize adjustable mixing strength. The cyclone combustor with the adjustable flame shape and mixing strength can guarantee combustion stability and low pollution in a wider range; and the operation property of the combustor can be conveniently and stably adjusted under each operation work condition and a coal type changing condition.

Description

The turbulent burner that a kind of flame profile and mixing intensity are adjustable
Technical field
The invention belongs to station boiler turbulent burner technical field, be specifically related to the adjustable turbulent burner of a kind of flame profile and mixing intensity.
Background technology
What station boiler turbulent burner use was at present wider is two tune wind eddy flow shade burners, and with profile of tooth ring and pulverized coal concentrator, to realize pulverized coal bias combustion and strengthening initial stage turbulence, the coal of help burning difficulty combustion.But station boiler load is changeable, China's ature of coal supply is also stable not, for design coal and the certain burner of load, once it is nonconforming to become coal or ature of coal, or low load operation all can cause burn deterioration, and even affect efficiency of combustion, pollutant generates and the safe and stable operation of combustion apparatus.Although existing turbulent burner is all realized bias combustion with pulverized coal concentrator, profile of tooth ring adds strong turbulence, various enlargings guiding air flow directions, once but these structure moulding are all difficult to regulation and control, be difficult to meet that boiler combustion coal is changeable, the adjustable requirement of real-time control of loading.
Summary of the invention
For solving the defect existing in above-mentioned prior art, order of the present invention is to provide a kind of flame profile and the adjustable turbulent burner of mixing intensity, can meet that boiler combustion coal is changeable, the adjustable requirement of real-time control of loading, can guarantee in wider scope stability and the low contaminative of burning, can be the in the situation that of various operating conditions and coal change, the convenient operation characteristic that stably regulates burner.
For achieving the above object, the technical solution adopted in the present invention is:
The turbulent burner that a kind of flame profile and mixing intensity are adjustable, comprise from inside to outside central air hose 12, an air channel 1, inner second air road 3 and outer second air road 2, outlet inner side, described inner second air road 3 be provided with adjustable outside a wind enlarging 7, in described outer second air road, 2 outlet inner sides are provided with adjustable inner second air enlarging 8, a described adjustable outer wind enlarging 7 and adjustable inner second air enlarging 8 be along the circumferential direction arranged in respectively on inner second air road 3 spout inwalls and outer second air road 2 spout inwalls on a plurality of outer wind enlarging small pieces 701 and a plurality of inner second air enlarging small pieces 801 form, described a plurality of outer wind enlarging small pieces 701 and a plurality of inner second air enlarging small pieces 801 one end are movably connected on wind path wall, wind enlarging small pieces 701 and the circumferential back of a plurality of inner second air enlarging small pieces 801 are symmetrical respectively outside a plurality of is fixed with a wind enlarging pull bar 702 and two inner second air enlarging pull bars 802 outside two described, by the axially-movable of an outer wind enlarging pull bar 702 and inner second air enlarging pull bar 802, regulate the enlarging angle β of an adjustable outer wind enlarging 7 1and/or the enlarging angle β of adjustable inner second air enlarging 8 2size.
Described enlarging angle β 1with enlarging angle β 2adjustable extent be 0 °~80 °.
In 1 exit, a described air channel, be provided with air-duct clapboard 4 one time, on the tube wall of described central air hose 12, have internal tooth form ring draw-in groove 501 and external tooth form ring draw-in groove 601 with air-duct clapboard 4 inner sides, adjustable internal tooth form ring 5 and adjustable external tooth form ring 6 are arranged on respectively in internal tooth form ring draw-in groove 501 and external tooth form ring draw-in groove 601, symmetrical two internal tooth form ring pull bars 502 and two the external tooth form ring pull bars 602 of being fixed with respectively at adjustable internal tooth form ring 5 and the circumferential back of adjustable external tooth form ring 6, by the axially-movable of internal tooth form ring pull bar 502 and two external tooth form ring pull bars 602, regulate the cooperation that moves axially of adjustable internal tooth form ring 5 and adjustable external tooth form ring 6, by rotation internal tooth form ring pull bar 502 and two external tooth form ring pull bars 602, realize the cooperation that rotates in a circumferential direction of adjustable internal tooth form ring 5 and adjustable external tooth form ring 6.
Compared with prior art, tool of the present invention has the following advantages:
1, the present invention is by an adjustable outer wind enlarging 7 and adjustable inner second air enlarging 8 and an outer wind enlarging pull bar 702 fixed thereon and inner second air enlarging pull bar 802, according to coal and load variations, realize the outer flame profile of adjusting burner nozzle, to adapt to actual condition, change.In the situation that other structures are constant, the enlarging angle β of adjustable inner second air enlarging 8 2become large, the center recirculating zone of making broadens, and capacity of returns increases, and promotes flammability; By the enlarging angle β of adjustable inner second air enlarging 8 2diminish, can reduce center recirculation zone area, ignition point is pushed away far, protection spout is not burned; The enlarging angle β of an adjustable outer wind enlarging 7 1become large, can postpone mixing of Secondary Air and a wind, institute's calorific requirement thereby reduction breeze airflow catches fire.
2, the present invention adopts the interior external tooth form ring fit system of thick coal culm side, the profile of tooth ring in the past of simultaneously forgoing is fixed on the structure on wind pipe wall one time, on the tube wall of central air hose 12, have internal tooth form ring draw-in groove 501 and external tooth form ring draw-in groove 601 with air-duct clapboard 4 inner sides, by internal tooth form ring pull bar 502 and two external tooth form ring pull bars 602, can realize moving axially of interior external tooth form ring like this and coordinate and the cooperation that rotates in a circumferential direction, obtain being beneficial under variable working condition the best turbulence effect of coal dust firing.An adjustable outer wind enlarging angle β 1with inner second air enlarging angle β 2the cooperation of size and profile of tooth ring changes can promote burner to load and the adaptability of coal and the adjusting function of burner.
Accompanying drawing explanation
Fig. 1 is the structural representation of the adjustable turbulent burner of flame profile of the present invention and mixing intensity.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is an outer wind enlarging angle β 1with inner second air enlarging angle β 2adjusting realizes schematic diagram.
Fig. 4 is that enlarging pull bar regulates an outer wind enlarging angle β 1with inner second air enlarging angle β 2become large schematic diagram, wherein: Fig. 4 (a) is that enlarging pull bar regulates enlarging angle to become large front view; Fig. 4 (b) is that enlarging pull bar regulates enlarging angle to become large right view.
Fig. 5 is that enlarging pull bar regulates an outer wind enlarging angle β 1with inner second air enlarging angle β 2the schematic diagram diminishing, wherein: Fig. 5 (a) is the front view that enlarging pull bar regulates enlarging angle to diminish; Fig. 5 (b) is the right view that enlarging pull bar regulates enlarging angle to diminish.
Fig. 6 is the assembling explosive view of interior external tooth form ring.
Fig. 7 is that interior external tooth form annulate shaft coordinates signal picture group to regulating, wherein: Fig. 7 (a) is that interior external tooth form annulate shaft is to concordant schematic diagram; Fig. 7 (b) is that internal tooth form ring inside contracts schematic diagram; Fig. 7 (c) is that external tooth form ring inside contracts schematic diagram.
Fig. 8 is that interior external tooth form ring rotates in a circumferential direction and coordinates signal picture group, wherein: Fig. 8 (a) is the interior external tooth form ring cooperation schematic diagram that rotates in a circumferential direction; Fig. 8 (b) is the staggered schematic diagram that coordinates of interior external tooth form ring; Fig. 8 (c) is interior external tooth form ring relative engagement schematic diagram.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, the turbulent burner that a kind of flame profile of the present invention and mixing intensity are adjustable, comprise from inside to outside central air hose 12, an air channel 1, inner second air road 3 and outer second air road 2, adjustable internal tooth form ring 5 is housed on central air hose 12, in 1 exit, an air channel, be provided with air-duct clapboard 4 one time, at an air-duct clapboard 4, adjustable external tooth form ring 6 is housed, in an air channel 1, be provided with removable Pulverized Coal Concentration block 11, in inner second air road 3, be provided with inner second air swirl vane 9, in secondary air duct 2, be provided with outer second air swirl vane 10 outside, outlet inner side, inner second air road 3 be provided with adjustable outside a wind enlarging 7, secondary air duct 2 outlet inner sides are provided with adjustable inner second air enlarging 8 outside, an adjustable outer wind enlarging 7 and adjustable inner second air enlarging 8 respectively by be along the circumferential direction arranged on inner second air road 3 spout inwalls and outer second air road 2 spout inwalls on a plurality of outer wind enlarging small pieces 701 and a plurality of inner second air enlarging small pieces 801 form, a plurality of outer wind enlarging small pieces 701 and a plurality of inner second air enlarging small pieces 801 one end are movably connected on wind path wall, on the tube wall of central air hose 12, have internal tooth form ring draw-in groove 501 and external tooth form ring draw-in groove 601 with air-duct clapboard 4 inner sides.
As shown in Figure 3, outside a plurality of, wind enlarging small pieces 701 and the circumferential back of a plurality of inner second air enlarging small pieces 801 are symmetrical is respectively fixed with a wind enlarging pull bar 702 and two inner second air enlarging pull bars 802 outside two.
As shown in Figure 4 and Figure 5, by the axially-movable of an outer wind enlarging pull bar 702 and inner second air enlarging pull bar 802, regulate the enlarging angle β of an adjustable outer wind enlarging 7 1and/or the enlarging angle β of adjustable inner second air enlarging 8 2size.
Described enlarging angle β 1with enlarging angle β 2adjustable extent be 0 °~80 °.
Fig. 6 is the assembling explosive view of interior external tooth form ring.
As shown in Figure 7, adjustable internal tooth form ring 5 and adjustable external tooth form ring 6 are arranged on respectively in internal tooth form ring draw-in groove 501 and external tooth form ring draw-in groove 601, symmetrical two internal tooth form ring pull bars 502 and two the external tooth form ring pull bars 602 of being fixed with respectively at adjustable internal tooth form ring 5 and the circumferential back of adjustable external tooth form ring 6, the axially-movable by internal tooth form ring pull bar 502 and two external tooth form ring pull bars 602 regulates the axial spacing of adjustable internal tooth form ring 5 and adjustable external tooth form ring 6 to change.
As shown in Figure 8, by rotation internal tooth form ring pull bar 502 and two external tooth form ring pull bars 602, realize the cooperation that rotates in a circumferential direction of adjustable internal tooth form ring 5 and adjustable external tooth form ring 6.
Operation principle of the present invention is: the effect due to air-duct clapboard and removable Pulverized Coal Concentration block, and make an air channel be divided into an interior air channel and an outer air channel, an interior air channel coal powder density improves, central side formation high concentration pulverized coal district spout outside; An outer wind passage forms low concentration coal dust district; After meeting with backflow high-temperature flue gas, high concentration pulverized coal district side coal dust can easily catch fire, thereby lights from inside to outside outside low concentration coal dust.Secondary Air is also divided into inside and outside two strands, at inside and outside secondary air channel, is all furnished with swirl vane, and wherein inner second air is strong eddy flow wind, is mainly the turbulence effect of the nearly nozzle of strengthening, and forms the recirculating zone outside spout, helps to catch fire; Outer second air is weak eddy flow wind, is mainly by remote jet, to supplement the oxygen of burning-out zone, helps after-flame; Adjustable inner second air enlarging can according to circumstances regulate enlarging angle β in real time 2thereby, control recirculating zone size and shape; An adjustable outer wind enlarging can regulate enlarging angle β 1, control Secondary Air and a wind incorporation time, adjust flame profile; Adjustable interior external tooth form ring can axially with circumferentially change and coordinate, the turbulence effect of control and regulation coal dust.

Claims (3)

1. the adjustable turbulent burner of a flame profile and mixing intensity, comprise from inside to outside central air hose (12), an air channel (1), inner second air road (3) and outer second air road (2), it is characterized in that: outlet inner side, described inner second air road (3) be provided with adjustable outside a wind enlarging (7), in outlet inner side, described outer second air road (2), be provided with adjustable inner second air enlarging (8), a described adjustable outer wind enlarging (7) is comprised of a plurality of outer wind enlarging small pieces (701) that are along the circumferential direction arranged on the spout inwall of inner second air air channel (3), adjustable inner second air enlarging (8) is comprised of a plurality of inner second air enlarging small pieces (801) that are along the circumferential direction arranged on outer second air road (2) spout inwall, described a plurality of outer wind enlarging small pieces (701) one end is movably connected on inner second air road (3) outlet inwall, described a plurality of inner second air enlarging small pieces (801) one end is movably connected on outer second air road (2) outlet inwall, described a plurality of outside wind enlarging small pieces (701) and a plurality of inner second air enlarging small pieces (801) circumferentially back is symmetrical is respectively fixed with a wind enlarging pull bar (702) and two inner second air enlarging pull bars (802) outside two, by the axially-movable of an outer wind enlarging pull bar (702) and inner second air enlarging pull bar (802), regulate the size of the adjustable outer enlarging angle β 1 of a wind enlarging (7) and/or the enlarging angle β 2 of adjustable inner second air enlarging (8).
2. the adjustable turbulent burner of flame profile according to claim 1 and mixing intensity, is characterized in that: the adjustable range of described enlarging angle β 1 and enlarging angle β 2 is 0~80 °.
3. the adjustable turbulent burner of flame profile according to claim 1 and 2 and mixing intensity, it is characterized in that: in exit, a described air channel (1), be provided with an air-duct clapboard (4), on the tube wall of described central air hose (12) and inside an air-duct clapboard (4), have internal tooth form ring draw-in groove (501) and external tooth form ring draw-in groove (601), adjustable internal tooth form ring (5) and adjustable external tooth form ring (6) are arranged on respectively in internal tooth form ring draw-in groove (501) and external tooth form ring draw-in groove (601), at circumferential back symmetrical two internal tooth form ring pull bars (502) and two the external tooth form ring pull bars (602) of being fixed with respectively of adjustable internal tooth form ring (5) and adjustable external tooth form ring (6), by the axially-movable of internal tooth form ring pull bar (502) and two external tooth form ring pull bars (602), regulate the cooperation that moves axially of adjustable internal tooth form ring (5) and adjustable external tooth form ring (6), by rotation internal tooth form ring pull bar (502) and two external tooth form ring pull bars (602), realize the cooperation that rotates in a circumferential direction of adjustable internal tooth form ring (5) and adjustable external tooth form ring (6).
CN201210158297.5A 2012-05-21 2012-05-21 Cyclone combustor with adjustable flame shape and mixing strength Active CN102679337B (en)

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CN102679337B true CN102679337B (en) 2014-08-20

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Publication number Priority date Publication date Assignee Title
CN105910101B (en) * 2016-06-13 2018-01-12 西安西热电站信息技术有限公司 A kind of pulverized coal concentrator of inside and outside deep or light real-time, tunable
CN106907709B (en) * 2017-02-23 2019-08-16 中国科学院工程热物理研究所 A kind of swirling number and the adjustable nozzle of turbulivity, nozzle array and burner
CN109340744B (en) * 2018-09-30 2019-11-08 西安交通大学 A kind of across load decoupling burning device of rich-lean type
CN113188119B (en) * 2021-02-07 2022-02-11 哈尔滨工业大学 Swirl pulverized coal burner with variable flaring
CN113188121A (en) * 2021-04-01 2021-07-30 东方电气集团东方锅炉股份有限公司 Ultralow nitrogen combustor spout, combustor and boiler

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CN2116837U (en) * 1992-03-28 1992-09-23 莫大春 Rotational flow stationary moved burner
US5259755A (en) * 1992-07-31 1993-11-09 Hauck Manufacturing Company Combination burner with boost gas injection
CN2296451Y (en) * 1997-04-12 1998-11-04 王永刚 Mixed coal power combustor
CN2416363Y (en) * 2000-02-28 2001-01-24 长沙胜能实业有限公司 Swirling adjustable oil fuel burner for industry furnace
CN1218140C (en) * 2003-06-23 2005-09-07 西安交通大学 Radial gradient two air-controlled cyclone coal dust combustor
CN100575785C (en) * 2006-04-03 2009-12-30 西安交通大学 Controllable eddy burner
CN202647746U (en) * 2012-05-21 2013-01-02 西安交通大学 Real-time adjustable novel swirl burner

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