CN103672885A - Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection - Google Patents
Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection Download PDFInfo
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- CN103672885A CN103672885A CN201310752285.XA CN201310752285A CN103672885A CN 103672885 A CN103672885 A CN 103672885A CN 201310752285 A CN201310752285 A CN 201310752285A CN 103672885 A CN103672885 A CN 103672885A
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Abstract
The invention provides a vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection, and relates to the vertical thick and thin direct flow coal powder combustion device. The vertical thick and thin direct flow coal powder combustion device aims at solving the problems that primary air deflection, the water cooling wall slag formation and the high-temperature corrosion can be easily caused by the existing vertical thick and thin combustor. A separation plate of the vertical thick and thin direct flow coal powder combustion device separates coal powder airflow entering the combustion device into two parts including a thick part and a thin part at the upper side and the lower side, a deflection hill body and a concentration hill body are respectively arranged on a thin primary air spraying opening and a thin primary air passage, a thick primary air spraying opening and the thin primary air spraying opening are respectively arranged at one side and the lower part of the thick primary air passage and at one side of the thin primary air passage, an angle between projection lines of a thick primary air jet flow center line and a thiin primary air jet flow center line entering a hearth on the horizontal plane is alpha, and the thin primary air center line deflects to the back fire side of the thick primary air center line. The vertical thick and thin direct flow coal powder combustion device is used for the coal powder conbustion in a coal-fired boiler.
Description
Technical field
The invention belongs to coal-powder boiler tangential firing technology, be specifically related to the vertical strong/weak direct-flow pulverized coal combustion device of a kind of wind nozzle interior deflection.
Background technology
Coal-powder boiler tangential firing technology refers generally to breeze airflow and introduces from being arranged in the parallel flow burner of 4 jiaos, burner hearth (or 6 jiaos, 8 jiaos, water-cooling wall) mode that burner hearth carries out tangential rotary combustion.The wind powder mixture co-operating coming by each angle forms a strong eddy flow fireball burning in stove.The geometric center lines in each wind, Secondary Air, tertiary air and an after-flame wind air port is all tangent with one or several imaginary circle of central authorities respectively.
Vertical bias combustion technology has been widely used in the tangential coal dust firing of direct current field.It is that a wind is carried out to deep or light classification by enrichment facility in short transverse, form thick coal culm air-flow and thin powdered coal air-flow, thick coal culm air-flow is when burning, because ignition heat reduces, Volatile is fast, and burning rapidly, is conducive to catching fire and burning of coal dust, simultaneously because thick coal culm air-flow and thin powdered coal air-flow have all departed from stoichiometric ratio burning, so can reduce the generation of NOx.Specifically, in the exploitation of burner, U.S. CE company has developed wide regulating ratio (WR) burner, utilizes the centrifugation of elbow to form bias pulverized coal air-flow, and then bias pulverized coal air-flow enters burner hearth by the horizontal baffle being arranged in nozzle body; Low pollution (PM) burner of Mitsubishi Heavy Ind. Ltd. (MHI) development, mainly by airduct, elbow, thick coal culm nozzle and a thin powdered coal nozzle, formed, primary wind and powder air-flow carries out separation when elbow under the effect of centrifugal force, thick coal culm air-flow enters burner hearth by top nozzle, thin powdered coal air-flow enters burner hearth by lower nozzle, thereby realizes coal dust vertical bias combustion.But find in actual moving process, while adopting vertical bias combustion, deflection easily occurs a wind, when there is deflection, a dense wind breeze airflow, in the zonal combustion close to from water-cooling wall, causes the phenomenons such as water-cooling wall slagging scorification and high temperature corrosion.
In sum, existing vertical bias combustion device exist easily cause a windage yaw tiltedly, the problem of water-cooling wall slagging scorification and high temperature corrosion.
Summary of the invention
The object of the invention is for solve existing vertical bias combustion device exist easily cause a windage yaw tiltedly, the problem of water-cooling wall slagging scorification and high temperature corrosion.And then provide the vertical strong/weak direct-flow pulverized coal combustion device of a kind of wind nozzle interior deflection.
Technical scheme of the present invention is: the vertical strong/weak direct-flow pulverized coal combustion device of a kind of wind nozzle interior deflection, it comprises dividing plate, bluff body, a dense wind snout, a light wind snout, deflection mound body and concentrated mound body, dividing plate is horizontally disposed with and the deep or light two strands of breeze airflows in burner hearth is separated into upper and lower two parts, top is a dense wind passage, bottom is a light wind passage, deflection mound body and concentrated mound body are separately positioned on a light wind snout and a light wind passage, a dense wind snout and a light wind snout are separately positioned on a side of a dense wind passage and the side that bottom is a light wind passage, and a dense wind snout and a light wind snout are made one, bluff body is arranged between a dense wind snout and a light wind snout, thick coal culm air-flow enters in stove by a dense wind passage and a dense wind snout on top, thin powdered coal air-flow enters in stove by a light wind passage and a light wind snout of bottom, entering the dense primary air jet center line of burner hearth and the angle between the projection line of light primary air jet center line on horizontal plane is α, a light wind center line is to the back-fire side deflection 4-12 ° of a dense wind center line.
The present invention compared with prior art has following effect:
Vertical bias combustion device of the present invention forms the fuel staging in vertical direction, two strands of wind of vertical strong/weak spray into and in stove, form the fuel staging in horizontal direction with certain angle on horizontal plane, this arrangement form can prevent that high concentration pulverized coal air-flow brush wall from causing water-cooling wall slagging scorification and high temperature corrosion, also can on cross section, form fractional combustion with thin powdered coal air-flow on the other hand, the burning form that forms interior dense outer light bellows chamber powder in vertical strong/weak, further reduces the generation of NOx.
The present invention is the deflection that realizes a light wind, considers burner nozzle furnace high-temperature environment of living in simultaneously, coal dust wash away the wearing and tearing that easily cause spout, bluff body or deflection mound body.So concentrated mound body is set in wind passage of thin powdered coal, in order to coal dust is concentrated to passage middle section, then wind snout of thin powdered coal arrange deflection mound body in order to by thin powdered coal air-flow to the deflection of water-cooling wall direction.
Accompanying drawing explanation
Fig. 1 is side view of the present invention; Fig. 2 is front view of the present invention; Fig. 3 is the structural representation of wind passage of thick coal culm of the present invention and nozzle; Fig. 4 is the structural representation of wind passage of thin powdered coal of the present invention and nozzle; Fig. 5 is that a plurality of coal powder burners of the present invention adopt four jiaos of structural representations under arrangement.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1-Fig. 4, present embodiment comprises dividing plate 2, bluff body 3, a dense wind snout 4, a light wind snout 5, deflection mound body 6 and concentrated mound body 7, dividing plate 2 is horizontally disposed with and the deep or light two strands of breeze airflows in burner hearth is separated into upper and lower two parts, top is a dense wind passage 8, bottom is a light wind passage 9, deflection mound body 6 and concentrated mound body 7 are separately positioned on a light wind snout 5 and a light wind passage 9, a dense wind snout 4 and a light wind snout 5 are separately positioned on a dense wind passage 8 and bottom is a side of a light wind passage 9, and a dense wind snout 4 and a light wind snout 5 are made one, bluff body 3 is arranged between a dense wind snout 4 and a light wind snout 5, thick coal culm air-flow enters in stove with a dense wind snout 4 by a dense wind passage 8 on top, thin powdered coal air-flow enters in stove with a light wind snout 5 by a light wind passage 9 of bottom, entering the dense primary air jet center line of burner hearth and the angle between the projection line of light primary air jet center line on horizontal plane is α, a light wind center line is to the back-fire side deflection 4-12 ° of a dense wind center line.
Deep or light two strands of general mood streams that the vertical strong/weak of present embodiment enters is separated.
The deflection mound body of present embodiment and concentrated mound body make light primary air jet and dense primary air jet with in certain angle jet stove.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, angle [alpha] between the center line of the dense primary air jet of present embodiment and the projection line of the center line of light primary air jet on burner hearth horizontal plane is 4～12 °, a dense low-angle traditional method of indicating the pronunciation of a Chinese character (0～5 °) for elegance, a light wind tangent is arranged.So arrange, can prevent that high concentration pulverized coal air-flow brush wall from causing water-cooling wall slagging scorification and high temperature corrosion, also can on cross section, form fractional combustion with thin powdered coal air-flow on the other hand, the burning form that forms interior dense outer light bellows chamber powder in vertical strong/weak, further reduces the generation of NOx.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1-Fig. 4, present embodiment is described, is arranged at surrounding air passage input surrounding air and coordinates deep or light two strands of wind to burn in present embodiment between furnace wall 1 and burner, wherein surrounding air 11 is arranged up and down, and discharge area equates.Surrounding air 10 left and right are arranged, are 2～3 times of back-fire side discharge area to fiery side outlet area.So arrange, in order to coordinate a wind combustor burning, other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment four: in conjunction with Fig. 1 and Fig. 4, the coal powder burner of present embodiment is arranged on several angles of burner hearths such as comprising burner hearth, overfire air jet or forms on the mobile wall of the circle of contact, this coal powder burner of multilayer and overfire air jet form burner, Secondary Air jet-core region line becomes main imaginary circle at freeze profile, angle between dense primary air jet extended line and the projection line of Secondary Air jet-core region line on horizontal plane is β (6～25 °) deflection to fiery side, at the contrary circle of contact of freeze profile Cheng Yuzhu imaginary circle.When the present invention contributes to prevent vertical bias combustion, coal dust brush wall causes water-cooling wall slagging scorification and high temperature corrosion, is conducive to again the control of NOx total emissions concentration.Other composition and annexation are identical with the specific embodiment one, two or three.
A wind coal burner of the present invention can be realized vertical oscillation to regulate steam temperature in stove, and the thin powdered coal spout of built-in deflection does not affect burner Integral swinging.
A wind coal burner of the present invention can in-line arrangement, in vertical direction with light-dense-light-dense-light-, also can adopt between two and be arranged symmetrically with, in vertical direction with light-dense-dense-light-light-.
The specific embodiment five: coal powder burner of the present invention, this Plant arrangement is on the four sides wall of burner hearth.Other composition and annexation are identical with the specific embodiment four.
The specific embodiment six: coal powder burner of the present invention, this Plant arrangement is on six angles of burner hearth.Other composition and annexation are identical with the specific embodiment five.
Claims (2)
1. the vertical strong/weak direct-flow pulverized coal combustion device of wind nozzle interior deflection once, it is characterized in that: it comprises dividing plate (2), bluff body (3), a dense wind snout (4), a light wind snout (5), deflection mound body (6) and concentrated mound body (7), dividing plate (2) is horizontally disposed with and the deep or light two strands of breeze airflows in burner hearth is separated into upper and lower two parts, top is a dense wind passage (8), bottom is a light wind passage (9), deflection mound body (6) and concentrated mound body (7) are separately positioned on a light wind snout (5) and a light wind passage (9), a side and bottom that a dense wind snout (4) and a light wind snout (5) are separately positioned on a dense wind passage (8) are a side of a light wind passage (9), and a dense wind snout (4) and a light wind snout (5) are made one, bluff body (3) is arranged between a dense wind snout (4) and a light wind snout (5), thick coal culm air-flow enters in stove with a dense wind snout (4) by a dense wind passage (8) on top, thin powdered coal air-flow enters in stove with a light wind snout (5) by a light wind passage (9) of bottom, entering the dense primary air jet center line of burner hearth and the angle between the projection line of light primary air jet center line on horizontal plane is α, a light wind center line is to the back-fire side deflection 4-12 ° of a dense wind center line.
2. the vertical strong/weak direct-flow pulverized coal combustion device of an a kind of wind nozzle interior according to claim 1 deflection, is characterized in that: the angle [alpha] between the center line of described dense primary air jet and the projection line of the center line of light primary air jet on burner hearth horizontal plane is 4～12 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310752285.XA CN103672885A (en) | 2013-12-31 | 2013-12-31 | Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection |
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| CN201310752285.XA CN103672885A (en) | 2013-12-31 | 2013-12-31 | Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection |
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| CN103672885A true CN103672885A (en) | 2014-03-26 |
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| CN201310752285.XA Pending CN103672885A (en) | 2013-12-31 | 2013-12-31 | Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708106A (en) * | 2018-12-19 | 2019-05-03 | 东方电气集团东方锅炉股份有限公司 | A kind of straight-through pulverized coal burner |
| WO2023160032A1 (en) * | 2022-02-25 | 2023-08-31 | 西安热工研究院有限公司 | Direct-current burner primary air chamber and method for preventing boiler slagging and high-temperature corrosion |
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| CN1118856A (en) * | 1994-09-16 | 1996-03-20 | 清华大学 | Concentrated coal powder straight flow burner |
| CN2253800Y (en) * | 1995-08-18 | 1997-05-07 | 哈尔滨锅炉有限责任公司 | Concentration type self-stabilizing coal powder burner |
| CN2273374Y (en) * | 1996-11-09 | 1998-01-28 | 哈尔滨工业大学 | Thick and thin wind pulverized coal burner |
| CN2432448Y (en) * | 2000-05-22 | 2001-05-30 | 王炜 | Energy-saving environmental protection straight-flow coal powder burner |
| CN2705711Y (en) * | 2004-01-12 | 2005-06-22 | 自贡东方锅炉科技开发有限公司 | Coal powder concentrator using hill and open blade |
| CN102563624A (en) * | 2012-02-29 | 2012-07-11 | 东方电气集团东方锅炉股份有限公司 | Combustion device for tangentially fired boiler and ultralow NOx combustion method employing same |
| EP2597367A1 (en) * | 2011-05-27 | 2013-05-29 | Shanghai Boiler Works, Ltd. | Dense-phase swirl pulverized coal burner |
| CN203628645U (en) * | 2013-12-31 | 2014-06-04 | 北京国电龙高科环境工程技术有限公司 | Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles |
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2013
- 2013-12-31 CN CN201310752285.XA patent/CN103672885A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1118856A (en) * | 1994-09-16 | 1996-03-20 | 清华大学 | Concentrated coal powder straight flow burner |
| CN2253800Y (en) * | 1995-08-18 | 1997-05-07 | 哈尔滨锅炉有限责任公司 | Concentration type self-stabilizing coal powder burner |
| CN2273374Y (en) * | 1996-11-09 | 1998-01-28 | 哈尔滨工业大学 | Thick and thin wind pulverized coal burner |
| CN2432448Y (en) * | 2000-05-22 | 2001-05-30 | 王炜 | Energy-saving environmental protection straight-flow coal powder burner |
| CN2705711Y (en) * | 2004-01-12 | 2005-06-22 | 自贡东方锅炉科技开发有限公司 | Coal powder concentrator using hill and open blade |
| EP2597367A1 (en) * | 2011-05-27 | 2013-05-29 | Shanghai Boiler Works, Ltd. | Dense-phase swirl pulverized coal burner |
| CN102563624A (en) * | 2012-02-29 | 2012-07-11 | 东方电气集团东方锅炉股份有限公司 | Combustion device for tangentially fired boiler and ultralow NOx combustion method employing same |
| CN203628645U (en) * | 2013-12-31 | 2014-06-04 | 北京国电龙高科环境工程技术有限公司 | Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708106A (en) * | 2018-12-19 | 2019-05-03 | 东方电气集团东方锅炉股份有限公司 | A kind of straight-through pulverized coal burner |
| CN109708106B (en) * | 2018-12-19 | 2023-10-24 | 东方电气集团东方锅炉股份有限公司 | Direct-current pulverized coal burner |
| WO2023160032A1 (en) * | 2022-02-25 | 2023-08-31 | 西安热工研究院有限公司 | Direct-current burner primary air chamber and method for preventing boiler slagging and high-temperature corrosion |
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Application publication date: 20140326 |