CN203628645U - Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles - Google Patents
Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles Download PDFInfo
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- CN203628645U CN203628645U CN201320890863.1U CN201320890863U CN203628645U CN 203628645 U CN203628645 U CN 203628645U CN 201320890863 U CN201320890863 U CN 201320890863U CN 203628645 U CN203628645 U CN 203628645U
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- 239000003245 coal Substances 0.000 title claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 26
- 210000004894 snout Anatomy 0.000 claims description 34
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 9
- 239000002817 coal dust Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000017899 Spathodea campanulata Nutrition 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
A vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles relates to vertical light and heavy direct flow pulverized coal combustion devices. The vertical light and heavy direct flow pulverized coal combustion device with the internal deflection primary air nozzles aims at solving the problems of primary air deviation, water wall slagging and high-temperature corrosion of an existing vertical light and heavy combustion device. According to the vertical light and heavy direct flow pulverized coal combustion device with the internal deflection primary air nozzles, a blocking plate separates pulverized coal air flow entering the combustion device into two portions of an upper heavy portion and a lower light portion, a deflection mound and a concentration mound are respectively arranged on a light primary air nozzle and a light primary air channel, a heavy primary air nozzle and the light primary air nozzle are respectively arranged on the lower portion of one side of a heavy primary air channel and one side of the light primary air channel, the angle between the projection lines of the jet flow centerline of the heavy primary air entering a furnace and the jet flow centerline of the light primary air entering the furnace on a horizontal plane is alpha, and the centerline of the light primary air deflects to the side of the centerline of the heavy primary air, which faces the back of fire. The vertical light and heavy direct flow pulverized coal combustion device with the internal deflection primary air nozzles is applicable to the combustion of pulverized coal of a coal-fired boiler.
Description
Technical field
The utility model belongs to coal-powder boiler tangential firing technology, is 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 introduces burner hearth and carries out the mode of tangential rotary combustion from being arranged in the parallel flow burner of 4 jiaos, burner hearth (or 6 jiaos, 8 jiaos, water-cooling wall).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 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 in the time of 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 formed by airduct, elbow, thick coal culm nozzle and a thin powdered coal nozzle, primary wind and powder air-flow separates in the time of 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 in actual moving process, find, adopt wind when vertical bias combustion that deflection easily occurs, in the time 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.
Utility model content
The purpose of this utility model be 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.
The technical solution of the utility model 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 side and bottom that a dense wind snout and a light wind snout are separately positioned on a dense wind passage are a side of 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, the angle entering between dense primary air jet center line and the projection line of light primary air jet center line on horizontal plane of burner hearth is α, a light wind center line is to the back-fire side deflection 4-12 ° of a dense wind center line.
The utility model compared with prior art has following effect:
The utility model vertical bias combustion device 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 utility model 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 utility model; Fig. 2 is front view of the present utility model; Fig. 3 is the structural representation of wind passage of the utility model thick coal culm and nozzle; Fig. 4 is the structural representation of wind passage of the utility model thin powdered coal and nozzle; Fig. 5 is that multiple coal powder burners of the present utility model 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, the angle entering between dense primary air jet center line and the projection line of light primary air jet center line on horizontal plane of burner hearth 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 what the vertical strong/weak of present embodiment entered is has 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 elegance is arranged with the low-angle traditional method of indicating the pronunciation of a Chinese character (0～5 °), a light wind tangent.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 that comprise the burner hearth such as 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 °) is partial to fiery side, at the contrary circle of contact of freeze profile Cheng Yuzhu imaginary circle.When the utility model 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 utility model 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 utility model 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 utility model, 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 utility model, 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, the angle entering between dense primary air jet center line and the projection line of light primary air jet center line on horizontal plane of burner hearth 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 |
|---|---|---|---|
| CN201320890863.1U CN203628645U (en) | 2013-12-31 | 2013-12-31 | Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890863.1U CN203628645U (en) | 2013-12-31 | 2013-12-31 | Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles |
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| Publication Number | Publication Date |
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| CN203628645U true CN203628645U (en) | 2014-06-04 |
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| CN201320890863.1U Expired - Lifetime CN203628645U (en) | 2013-12-31 | 2013-12-31 | Vertical light and heavy direct flow pulverized coal combustion device with internal deflection primary air nozzles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672885A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection |
-
2013
- 2013-12-31 CN CN201320890863.1U patent/CN203628645U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672885A (en) * | 2013-12-31 | 2014-03-26 | 北京国电龙高科环境工程技术有限公司 | Vertical thick and thin direct flow coal powder combustion device realizing primary air spray nozzle inside deflection |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |