CN102607018B - Graded air-feed dual-swirled pulverized coal industrial furnace combustor - Google Patents
Graded air-feed dual-swirled pulverized coal industrial furnace combustor Download PDFInfo
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- CN102607018B CN102607018B CN201210052904.XA CN201210052904A CN102607018B CN 102607018 B CN102607018 B CN 102607018B CN 201210052904 A CN201210052904 A CN 201210052904A CN 102607018 B CN102607018 B CN 102607018B
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- cyclone
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Abstract
The invention discloses a graded air-feed dual-swirled pulverized coal industrial furnace combustor, solving the problem of lower combustion efficiency of the conventional coal industrial furnace. The graded air-feed dual-swirled pulverized coal industrial furnace combustor comprises two parts, namely a secondary air box and a graded air box which are partitioned by an annular baffle plate; a pre-combustion chamber is arranged in the region which is enclosed by the secondary air box and the graded air box; the front section of the pre-combustion chamber is cylindrical; the middle section of the pre-combustion chamber is of a divergent conical cylinder shape; the rear section of the pre-combustion chamber is a cylinder; the front section of the pre-combustion chamber is enclosed in the secondary air box, and communicated with the secondary air box through a secondary air swirler; the middle section of the pre-combustion chamber and the rear section of the pre-combustion chamber are enclosed in the graded air box, and separated from the graded air box through an annular water cooling jacket; a graded air swirler is arranged in the outlet of the pre-combustion chamber; a primary air pipe is inserted into the pre-combustion chamber after penetrating through the secondary air box; a reflective ignition gun is inserted into the pre-combustion chamber through the centre of the primary air pipe; and the ignition position of the reflective ignition gun is arranged in the centre of the pre-combustion chamber. According to the graded air-feed dual-swirled pulverized coal industrial furnace combustor, disclosed by the invention, pulverized coal and air can be better ensured to be mixed uniformly, so that a better heat-exchange effect is reached.
Description
Technical field
The present invention relates to a kind of burner, especially relate to a kind of air stage feeding double-cyclone industrial coal powder boiler burner.
Background technology
China has exceeded 400,000 at the coal-burned industrial boiler of operation now, the raw coal total amount of annual coal-fired industry consumption approaches 500,000,000 tons, but the problems such as that ubiquity is backward in technique, less economical, highly energy-consuming, its average operating efficiency is only 68% according to statistics, and the average operating efficiency of low capacity boiler only has 55% left and right especially.Traditional coal-burned industrial boiler is organized block burning of coal because majority has adopted the mode of this grate firing of chain furnace, and due to the defect of chain furnace self type of furnace characteristic and combustion system, has determined that its efficiency of combustion is difficult to further improve again.
Adopt the burning of coal of organizing of coal dust suspension combustion mode, can make the utilization ratio of coal reach a higher level.Adopt at present suspension combustion mode to organize the station boiler that furnace cavity is larger that mostly is of coal dust firing, but because the furnace cavity of Industrial Boiler is less, highly organized aerodynamic field is comparatively difficult to guarantee the burning of coal dust, thereby especially in Small And Medium Capacity Industrial Boiler, rarely has application at Industrial Boiler.Researching and developing a kind of new coal powder combustion of industrial boiler device that can be organized in preferably efficient stable burning in stove, can prevent from again occurring in stove slagging scorification simultaneously, is the key that solves this technical barrier.
Summary of the invention
For above problem, the object of the present invention is to provide a kind of air stage feeding double-cyclone industrial coal powder boiler burner that is applicable to Industrial Boiler.
Technical scheme of the present invention is: it is secondary air box and classification bellows two parts that air compartment of the present invention is cut off by a ring baffle, in the region being surrounded, is provided with a precombustion chamber by secondary air box and classification bellows; Described precombustion chamber leading portion is cylindric, and stage casing is flaring cone tubular, and back segment is cylinder; Described precombustion chamber leading portion is surrounded in secondary air box, and is communicated with secondary air box by Secondary Air cyclone; Described precombustion chamber stage casing and back segment are surrounded in classification bellows, and are separated by by an annular water collar and classification bellows; In precombustion chamber exit, be provided with classification wind cyclone; An airduct runs through secondary air box and inserts in precombustion chamber, and a reflective burning torch is inserted in precombustion chamber by an airduct center, and this reflective burning torch ignition location is arranged at precombustion chamber center.
Described Secondary Air cyclone is tangential cyclone, and its structure mainly comprises Secondary Air tangential swirl blade and Secondary Air eddy flow wall; Described Secondary Air eddy flow wall is planar annular, has aperture in it in ring side, for being flexibly connected of Secondary Air tangential swirl blade; Described Secondary Air tangential swirl blade one end and Secondary Air eddy flow wall are connected in interior ring side, and now Secondary Air tangential swirl blade can swing in perpendicular direction, can not move in horizontal plane direction.
The tangential swirl blade of described Secondary Air cyclone is connected by the eddy flow angle control loop of an annular, and eddy flow angle control loop all adopts active wring point to be connected with the tie point of each swirl vane; Described eddy flow angle control loop is connected by active wring point with an eddy flow angle control lever, and eddy flow angle control lever is connected with adjusting rod by active wring point, and described adjusting rod afterbody is processed into spline-simulating; In burner secondary air box, one cyclone adjustment disk is set outward, the connecting rod of this adjustment disk stretches in secondary air box, and connecting rod afterbody connects a gear, and described gear engages with the tooth bar of described adjusting rod afterbody; Described cyclone adjustment disk is connected by gear and the engagement of adjusting rod afterbody tooth bar with described adjusting rod.
The adjustable inlet air angle of described Secondary Air tangential swirl blade is 30 ° ~ 50 °.
Described classification wind cyclone is tangential cyclone, its structure mainly comprises classification wind tangential swirl vane and classification wind eddy flow wall, described classification wind eddy flow wall is planar annular, and described classification wind tangential swirl vane and classification wind eddy flow wall adopt and be welded to connect.
The air inlet angle of described classification wind tangential swirl blade is a set angle.
Described water collar is between precombustion chamber and classification bellows, and this water collar downside is provided with a cooling water inlet pipe road, upside is provided with a cooling water outlet pipe road; Described cooling water inlet pipe road is passed by secondary air box, is connected to the water tank of steam generator system; Described cooling water outlet pipe road is passed by classification bellows, is connected to the economizer water inlet of steam generator system.
Described secondary air box downside connecting secondary airduct.
Described classification bellows downside connects classification airduct.
Described reflective burning torch is provided with a reflection alms bowl in the first side of rifle, and described reflection alms bowl opening is towards an airduct, reflects alms bowl and a wind tube outlet keeps a setpoint distance during installation.
The beneficial effect that the present invention has is:
1. air enters combustion zone via Secondary Air cyclone and classification wind cyclone, and the swirling eddy of generation has been strengthened the flow perturbation in flow field, and what can better guarantee coal dust and air evenly mixes and reach more excellent heat transfer effect.
2. the present invention adopts the air stage feeding mode of Secondary Air and classification wind, has played inhibition NO
xthe effect generating.
3. the swirl vane angles of Secondary Air cyclone of the present invention is adjustable, has realized the continuous adjusting of secondary wind swirl intensity, has strengthened the coal adaptability of this industrial coal powder boiler burner.
4. the present invention is provided with water collar in pre-burning locular wall periphery, and burner operation is to precombustion chamber wall, to carry out by cooling water coolingly, can effectively prevent burner generation slagging scorification.
5. the present invention has designed a kind of Novel reflection-type burning torch, because this igniter igniting side is provided with a reflection alms bowl, when a wind is sprayed by primary air nozzle, pulverized coal particle is because himself inertia is to reflect the alms bowl segment distance that will rebound after clashing into, thereby can make can first be occurred fully to mix with pulverized coal particle by the swirl secondary air of Secondary Air tangential swirl device ejection, ignite with precombustion chamber centre afterwards, can effectively improve the burnout rate of coal dust at Initial Stage after Ignition, coal dust is burnt more fully.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to view.
Fig. 3 is the structural representation of Secondary Air cyclone of the present invention.
Fig. 4 is the structural principle schematic diagram of Secondary Air cyclone governor motion of the present invention.
Fig. 5 is the engagement enlarged diagram of C part in Fig. 3.
Fig. 6 is the structural representation of classification wind cyclone.
In figure: 1, an airduct, 2, secondary air box, 3, Secondary Air cyclone, 4, water collar, 5, precombustion chamber, 6, reflective burning torch, 7, reflection alms bowl, 8, cooling water inlet pipe, 9, cooling water outlet pipe, 10, classification wind cyclone, 11, secondary air channel, 12, classification bellows, 13, classification airduct, 14, ring baffle, 15, adjusting rod, 16, eddy flow angle control lever, 17, active wring point, 18, Secondary Air tangential swirl blade, 19, eddy flow angle control loop, 20, interior air channel, 21, Secondary Air eddy flow wall, 22, cyclone adjustment disk, 23, gear, 24, classification wind tangential swirl blade, 25, classification wind eddy flow wall.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1 and Figure 2, ring baffle of air compartment of the present invention 14 cuts off for secondary air box 2 and classification bellows 12 two parts, secondary air box 2 downside connecting secondary airducts 11, and classification bellows 12 downsides connect classification airduct 13.In the region being surrounded by secondary air box 2 and classification bellows 12, be provided with precombustion chamber 5, precombustion chamber 5 leading portions are cylindric, and stage casing is flaring cone tubular, back segment is cylindric, wherein, precombustion chamber 5 leading portions are surrounded in secondary air box 2, and are communicated with secondary air box 2 by Secondary Air cyclone 3; Precombustion chamber 5 stage casings and back segment are surrounded in classification bellows 12, and are separated with classification bellows 12 by an annular water collar 4.The downside of water collar 4 is provided with cooling water inlet pipe road 8, and cooling water inlet pipe road 8 is passed by secondary air box 2, is connected to the water tank of steam generator system; The upside of water collar 4 is provided with cooling water outlet pipe road 9, and cooling water outlet pipe road 9 is passed by classification bellows 12, is connected to the economizer water inlet of steam generator system.In precombustion chamber 5 exits, be also provided with classification wind cyclone 10.
An airduct 1 runs through secondary air box 2 and inserts in precombustion chamber 5, and reflective burning torch 6 is inserted into airduct 1 center and extends in precombustion chamber 5, and reflective burning torch 6 ignition locations are arranged at precombustion chamber 5 centers.Reflective burning torch 6 is provided with a reflection alms bowl 7 in the first side of rifle, and the opening of reflection alms bowl 7 is towards an airduct 1, and the outlet of reflecting alms bowl 7 and an airduct 1 during installation keeps a specific range.
As shown in Fig. 3, Fig. 4, Fig. 5, Secondary Air cyclone 3 is tangential cyclone, and its structure mainly comprises Secondary Air tangential swirl blade 18 and Secondary Air eddy flow wall 21.Secondary Air eddy flow wall 21 is planar annular, has aperture in it in ring side, for being flexibly connected of Secondary Air tangential swirl blade 18; Secondary Air tangential swirl blade 18 one end and Secondary Air eddy flow wall 21 are connected in interior ring side, and now Secondary Air tangential swirl blade 18 can rotate around swirl vane 18 and the interior ring side tie point of Secondary Air eddy flow wall 21 in perpendicular.
The tangential swirl blade 18 of Secondary Air cyclone 3 is also connected with eddy flow angle control loop 19, and eddy flow angle control loop 19 all adopts active wring point 17 to be connected with the tie point of each swirl vane 18.Eddy flow angle control loop 19 is connected by active wring point 17 with eddy flow angle control lever 16, and eddy flow angle control lever 16 is connected with adjusting rod 15 by active wring point 17, and adjusting rod 15 afterbodys are processed into spline-simulating.In burner secondary air box 2, be outside equipped with cyclone adjustment disk 22, the connecting rod of this adjustment disk stretches in secondary air box 2, connecting rod afterbody connects a gear 23, gear 23 engages with the tooth bar of adjusting rod 15 afterbodys, be that cyclone adjustment disk 22 is connected by gear 23 and adjusting rod 15 afterbody tooth bar engagements with adjusting rod 15, by rotation adjustment disk 22, can be realized the inlet air angle of Secondary Air tangential swirl blade 18 is regulated, the adjustable inlet air angle of Secondary Air tangential swirl blade 18 is 30 °～50 °.
As shown in Figure 6, internal structure and the Secondary Air cyclone of classification wind cyclone 10 are basically identical, only different in the connected mode of swirl vane.Classification wind cyclone 10 is tangential cyclone, mainly comprise classification wind tangential swirl blade 24 and classification wind eddy flow wall 25, classification wind eddy flow wall 25 is planar annular, between classification wind tangential swirl vane 24 and classification wind eddy flow wall 25, adopts and is welded to connect.The air inlet angle of classification wind tangential swirl blade 24 is a certain special angle.
Operation principle of the present invention is as follows: during work, first open the pressure fan in industrial boiler system, air is blasted in secondary air box 2 and classification bellows 12.Air in secondary air box 2 and the classification bellows 12 respectively tangential swirl blade in Secondary Air cyclone 3 and classification wind cyclone 10 enters in precombustion chamber 5, has formed rotating jet.Two strands of the front and back rotating jet being entered by Secondary Air cyclone 3 and classification wind cyclone 10 respectively in precombustion chamber has effectively been strengthened the disturbance of aerodynamic field, and in jet-core region, form a recirculating zone, can entrainment high-temperature flue gas, these are all of value to the heat transfer effect of strengthening between flue gas and pulverized coal particle, contribute to lighting and burning of coal dust.Meanwhile, the cyclone classification wind being entered by classification wind cyclone 10 can also play the effect of the required oxygen of aftercombustion, has reached the object of air stage feeding, contributes to suppress NO in process of coal combustion
xgeneration.
At swirl secondary air and classification wind, enter after precombustion chamber 5, first by reflective burning torch 6, pass into oil fuel or the gaseous fuel for igniting, and the fire rod being carried by reflective burning torch 6 is lighted the fuel for igniting, preheating was opened primary air fan after 5～10 seconds, by air, carrying coal dust is entered in precombustion chamber 5 by an airduct 1, pulverized coal particle airduct 1 exit can with reflective burning torch 6 on reflection alms bowl 7 bump, the middle section position of precombustion chamber 5 is got back in bounce-back afterwards, now the swirl secondary air of pulverized coal particle and incoming flow meets, because swirl secondary air has stronger perturbation, thereby can guarantee fully mixing of coal dust and swirl secondary air.The wind coal mixed flow of full and uniform mixing continues forward impelling, by running into reflective burning torch 6, lights the torch that ignites and produce with fuel, makes fugitive constituent in pulverized coal particle separate out, burn, and then pulverized coal particle is burnt.The high temperature torch that coal dust is lighted generation mixes with the cyclone classification wind being penetrated by classification wind cyclone 10 in precombustion chamber outlet, supplemented the required oxygen part of coal dust firing, and by cyclone classification wind, strengthened air agitation, still unburned pulverized coal particle enough can be lighted.After the preheating of about 10 seconds, reflective ignition air gun 6 stops igniting, the pulverized coal particle being entered after igniting by the coal dust torch having burnt, thus realize the ignition process of burner.
In the overall process of burner igniting and steady combustion, cooling water in water collar 4 remains mobile, by water pump, the clear water through boiler water processing is extracted out in the water tank by steam generator system, by cooling water inlet pipe 8, enter into water collar 4, because sending constantly into of clear water makes water in water collar by cooling water outlet pipe 9 Natural excrements, cooling water is incorporated in the economizer of steam generator system and goes from cooling water outlet pipe 9 is discharged, so that resource is fully utilized.
In order to strengthen the coal adaptability of burner of the present invention, Secondary Air cyclone 3 is designed to blade air inlet angle adjustable structure, its specific implementation is as follows: when rotating cyclone adjustment disk 22, the connecting rod of this cyclone adjustment disk drives the gear 23 of afterbody to rotate, because gear 23 engages with the rack segments of adjusting rod 15 afterbodys, thereby when gear 23 rotates, adjusting rod 15 entirety can move to the left or to the right.When adjusting rod 15 is subjected to displacement, the eddy flow angle control lever 16 being connected in active wring point 17 with adjusting rod 15 will be subjected to displacement thereupon, and then drive the eddy flow angle control loop 19 being connected in active wring point 17 with this eddy flow angle control lever 16 to rotate.When eddy flow angle control loop 19 rotates, tangential swirl blade 18 also will swing thereupon, thereby realize the adjusting of Secondary Air inlet air angle.Described Secondary Air tangential swirl blade 18 inlet air angle of regulation range are 30 °～50 °, and this angular range can, by the concrete condition in practical application example, be controlled by the processing length of the rack segments to adjusting rod 15 afterbodys.
Claims (1)
1. an air stage feeding double-cyclone industrial coal powder boiler burner, is characterized in that: it is secondary air box and classification bellows two parts that air compartment is cut off by a ring baffle, in the region being surrounded, is provided with a precombustion chamber by secondary air box and classification bellows; Described precombustion chamber leading portion is cylindric, and stage casing is flaring cone tubular, and back segment is cylinder; Described precombustion chamber leading portion is surrounded in secondary air box, and is communicated with secondary air box by Secondary Air cyclone; Described precombustion chamber stage casing and back segment are surrounded in classification bellows, and are separated by by an annular water collar and classification bellows; In precombustion chamber exit, be provided with classification wind cyclone; An airduct runs through secondary air box and inserts in precombustion chamber, and reflective burning torch is inserted in precombustion chamber by an airduct center, and this reflective burning torch ignition location is arranged at precombustion chamber center;
Described Secondary Air cyclone is tangential cyclone, and its structure mainly comprises Secondary Air tangential swirl blade and Secondary Air eddy flow wall; Described Secondary Air eddy flow wall is planar annular, has aperture in it in ring side, for being flexibly connected of Secondary Air tangential swirl blade; Described Secondary Air tangential swirl blade one end and Secondary Air eddy flow wall are connected in interior ring side, and now Secondary Air tangential swirl blade can swing in perpendicular direction, can not move in horizontal plane direction;
The Secondary Air tangential swirl blade of described Secondary Air cyclone is connected by the eddy flow angle control loop of an annular, and eddy flow angle control loop all adopts active wring point to be connected with the tie point of each Secondary Air tangential swirl blade; Described eddy flow angle control loop is connected by active wring point with an eddy flow angle control lever, and eddy flow angle control lever is connected with adjusting rod by active wring point, and described adjusting rod afterbody is processed into spline-simulating; In burner secondary air box, one cyclone adjustment disk is set outward, the connecting rod of this cyclone adjustment disk stretches in secondary air box, and connecting rod afterbody connects a gear, and described gear engages with the tooth bar of described adjusting rod afterbody; Described cyclone adjustment disk is connected by gear and the engagement of adjusting rod afterbody tooth bar with described adjusting rod;
The adjustable inlet air angle of described Secondary Air tangential swirl blade is 30 °～50 °;
Described classification wind cyclone is tangential cyclone, its structure mainly comprises classification wind tangential swirl vane and classification wind eddy flow wall, described classification wind eddy flow wall is planar annular, and described classification wind tangential swirl vane and classification wind eddy flow wall adopt and be welded to connect;
The air inlet angle of described classification wind tangential swirl blade is a set angle;
Described water collar is between precombustion chamber and classification bellows, and this water collar downside is provided with a cooling water inlet pipe road and upside is provided with a cooling water outlet pipe road; Described cooling water inlet pipe road is passed by secondary air box, is connected to the water tank of steam generator system; Described cooling water outlet pipe road is passed by classification bellows, is connected to the economizer water inlet of steam generator system;
Described secondary air box downside connecting secondary airduct;
Described classification bellows downside connects classification airduct;
Described reflective burning torch is provided with a reflection alms bowl in the first side of rifle, and described reflection alms bowl opening is towards an airduct, reflects alms bowl and a wind tube outlet keeps a setpoint distance during installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052904.XA CN102607018B (en) | 2012-03-02 | 2012-03-02 | Graded air-feed dual-swirled pulverized coal industrial furnace combustor |
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|---|---|---|---|
| CN201210052904.XA CN102607018B (en) | 2012-03-02 | 2012-03-02 | Graded air-feed dual-swirled pulverized coal industrial furnace combustor |
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| CN102607018A CN102607018A (en) | 2012-07-25 |
| CN102607018B true CN102607018B (en) | 2014-04-16 |
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| CN103123113A (en) * | 2013-01-24 | 2013-05-29 | 孙公钢 | Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device |
| CN103471108B (en) * | 2013-07-22 | 2016-08-31 | 北京航天动力研究所 | Laughing gas burner |
| WO2018036566A1 (en) * | 2016-08-25 | 2018-03-01 | Zheng Shi | System and method for burning pulverized coal |
| CN106196042B (en) * | 2016-08-29 | 2018-05-25 | 煤科院节能技术有限公司 | A kind of strong swirl jet burner |
| CN106642084B (en) * | 2016-12-08 | 2019-07-26 | 哈尔滨工业大学 | It is a kind of double that wind is adjusted to be vortexed by force melting burner |
| CN107062212B (en) * | 2017-05-22 | 2023-11-07 | 北京醇能科技有限公司 | Low boiling point fuel staged combustion device and system thereof |
| CN107842848A (en) * | 2017-12-08 | 2018-03-27 | 煤科院节能技术有限公司 | A kind of Industrial Boiler precombustion chamber |
| CN108194918B (en) * | 2018-03-30 | 2023-12-22 | 烟台龙源电力技术股份有限公司 | Pulverized coal pretreatment device of boiler and boiler |
| CN108525869A (en) * | 2018-06-04 | 2018-09-14 | 晋江美创环保设备有限公司 | A kind of cyclone of adjustable spinning disk angle and desulfurizing tower using the cyclone |
| CN114887786B (en) * | 2022-05-11 | 2023-08-29 | 北京天地融创科技股份有限公司 | Nozzle capable of adjusting fluid flow velocity |
| CN115949970B (en) * | 2023-01-05 | 2023-08-22 | 中国航空发动机研究院 | Cyclone blade and cyclone |
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|---|---|---|---|---|
| FR2842584A1 (en) * | 2002-07-17 | 2004-01-23 | Fritz Schoppe | Powdered coal burner flame stability enhancer and process uses primary flame to pre-heat coal before it is fed with heated air to main flame |
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Granted publication date: 20140416 Termination date: 20210302 |