CN202792007U - Crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for rotary kiln - Google Patents
Crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for rotary kiln Download PDFInfo
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- CN202792007U CN202792007U CN201220459736.1U CN201220459736U CN202792007U CN 202792007 U CN202792007 U CN 202792007U CN 201220459736 U CN201220459736 U CN 201220459736U CN 202792007 U CN202792007 U CN 202792007U
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Abstract
The utility model discloses a crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for a rotary kiln in the field of burners. The crossed-jetting-type low-nitrogen energy-saving pulverized coal burner comprises an adjustable whirlcone, a coal nozzle, an axial-flow air nozzle and an axial-flow air jacket, wherein an axial-flow air flue is formed between the axial-flow air jacket and the axial-flow air nozzle; a coal air flue is formed between the axial-flow air nozzle and the coal nozzle; a whirl air flue is formed between the coal nozzle and the adjustable whirlcone; a honeycomb rotary-cutting nozzle is coaxially arranged inside the adjustable whirlcone; an ignition channel is connected with the center of the honeycomb rotary-cutting nozzle; and an inclined surface is processing on the inner side, close to the outlet end surface of the whirl air nozzle, inside the axial-flow air jacket. According to the crossed-jetting-type low-nitrogen energy-saving pulverized coal burner provided by the utility model, the coal air flue is arranged between the axial-flow air flue and the whirl air flue, and the combustion characteristics of pulverized coal are utilized to improve pulverized coal conveying concentration, improve the jetting condition of combustion air after the pulverized coal dust is sprayed out, and reduce energy consumption and generation of NOX, so that the coal burner can be used for pulverized coal combustion of the rotary kiln.
Description
Technical field
The utility model relates to a kind of burner, particularly a kind of coal burner.
Background technology
Along with China's heavy industry develop rapidly, energy resource consumption, environmental pollution have seriously restricted the sustainable development of economic society." the 12 " initial stage, government includes oxynitride discharge in the national energy-saving emission reduction tasks first, and in the total amount emission reduction tasks of assigning to each province and city, and newly-increased ammonia nitriding compound and two fresh contents of oxynitrides, require the discharging of oxynitrides total amount to reduce 10%.Also point out in " building materials industry " 12 " science and technology development planning " file that Ministry of Industry and Information and Chinese building material federation promulgate recently, in the building material product production processes such as cement, will reduce the discharging of cement industry dust and oxynitrides.
The steel and cement industry is typical high energy consumption, maximum discharge industry.Rotary kiln is widely used in these two industries.And most of fuel that rotary kiln consumes is all realized burning by rotary kiln burner.China is consumption of coal big country, and most rotary kilns all use coal dust to act as a fuel.Therefore use novel burner, the efficiency of combustion, reduction energy consumption, the minimizing discharging that improve rotary kiln become instant task.
A kind of cement rotary kiln multi-medium multi-channel discrete low-NOx burner is disclosed in the prior art, its publication number is CN201476001U, it is comprised of four circular passages, be followed successively by from outside to inside the axial flow air channel, the eddy flow air channel, coal air channel and center wind duct, the burner center arranges water-coal-slurry pipeline, the water-coal-slurry pipeline exit arranges the water-coal-slurry burner, its weak point is: the daraf(reciprocal of farad) that superonic flow nozzzle that discrete type is arranged, it is stronger to sweep across the Secondary Air ability, but Laval-cavity nozzle is the stationary exit area, the axial flow monsoon intensity can only be regulated by the butterfly valve control axial flow wind air quantity of upstream, adjust the fluctuation of open area adaptation fuel if adjust, need to stop kiln with changing nozzle, adaptability is relatively poor; And the place arranges coal-water slurry nozzle at the center ducting outlet, produces water gas reaction in flame base, forms reducing atmosphere, reduces the discharging of NOx.The rotary kiln industry overwhelming majority uses coal dust to act as a fuel at present, coal-water slurry nozzle is set increases extra facility, operation and maintenance is required high, consumable accessory is many, be unfavorable for the control of cost and the simplification of system, reliability is not high, can't large-scale application in present level of industrial technology.
The utility model content
The purpose of this utility model provides the low indole energy of a kind of rotary kiln cross jet formula coal burner, so that its fuel tolerance is stronger, the flame regulating measure is more flexible, and simple in structure, easy operating, and maintenance cost is low, and energy consumption is low, good reliability.
The purpose of this utility model is achieved in that the low indole energy of a kind of rotary kiln cross jet formula coal burner, comprise from inside to outside coaxial package adjustable cyclone together, coal wind nozzle, axial flow wind nozzle and axial flow wind overcoat, form the axial flow air channel between described axial flow wind overcoat and the axial flow wind nozzle, form the coal air channel between described axial flow wind nozzle and the coal wind nozzle, form the eddy flow air channel between described coal wind nozzle and the adjustable cyclone, described adjustable cyclone inside is coaxially arranged with honeycomb rotary-cut nozzle, described honeycomb rotary-cut nozzle center place is connected with ignition channel, and described eddy flow wind overcoat is inboard by being processed with the inclined plane through the position of eddy flow wind jet expansion end face.
During the utility model work, axial flow wind and eddy flow wind form first cross jet zone, solved the problem that causes the fuel after-flame because of high concentration pulverized coal combustion, and in flame flame core middle front part formation reducing atmosphere district, in the situation that guarantees the cement kiln process condition, greatly reduced the generation of NOx, because eddy flow wind overcoat is inboard by being processed with the inclined plane through the position of eddy flow wind jet expansion end face, can adjust by regulating whirlwind nozzle axial location the discharge area of axial flow wind, thereby adjust the area ratio of axial flow wind and eddy flow wind, finish the jet situation of adjusting first cross jet zone, reached the needs that adapt to the variety classes coal dust firing; The wind of eddy flow wind and honeycomb rotary-cut nozzle ejection forms second cross jet zone, has not only replenished the recirculating zone that enough oxygen helps after-flame but also forms the flame flame core, is conducive to form stable flame.Compared with prior art, the beneficial effects of the utility model are: the utility model is on the basis that does not increase other equipment, by the coal air channel being arranged between axial flow air channel and the whirlwind road, utilize the combustion characteristics of coal dust, improve the coal dust transportation concentration, improve the jet situation of the combustion air after coal dust sprays, form the zone of an anoxic in the starting stage of burning, improve fuel at holdup time and the temperature levels in fuel enrichment zone, increase the coke particle in the holdup time in fuel enrichment zone, reduce the formability of nitrogen oxide in the coke particle; Reduce to greatest extent energy consumption, reduce the generation of NOX.The utility model can be used in the rotary kiln coal dust firing.
As further improvement of the utility model, described honeycomb rotary-cut nozzle comprises axial flow hole, axial flow hole, whirl hole three-decker from inside to outside.Further guaranteed the stability of fuel combustion.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the enlarged drawing at A place among Fig. 1.
Fig. 3 is a kind of view of the utility model.
Fig. 4 is the another kind of view of the utility model.
Wherein, 1 axial flow wind overcoat, 2 axial flow wind nozzles, 3 coal wind nozzles, 4 adjustable cyclones, 5 honeycomb rotary-cut nozzles, 5a, 5b axial flow hole, 5c whirl hole, 6 ignition channels.
The specific embodiment
The low indole energy of a kind of rotary kiln cross jet formula as shown in Figure 1 coal burner, comprise from inside to outside coaxial package adjustable cyclone 4 together, coal wind nozzle 3, axial flow wind nozzle 2 and axial flow wind overcoat 1, form the axial flow air channel between axial flow wind overcoat 1 and the axial flow wind nozzle 2, form the coal air channel between axial flow wind nozzle 2 and the coal wind nozzle 3, form the eddy flow air channel between coal wind nozzle 3 and the adjustable cyclone 4, adjustable cyclone 4 inside are coaxially arranged with honeycomb rotary-cut nozzle 5, honeycomb rotary-cut nozzle 5 comprises axial flow hole 5a from inside to outside, axial flow hole 5b, whirl hole 5c three-decker, honeycomb rotary-cut nozzle 5 centers are connected with ignition channel 6.
During the utility model work, axial flow wind and eddy flow wind form first cross jet zone, solved because of the high problem that causes the fuel after-flame of the dense degree of coal dust, and in flame flame core middle front part formation reducing atmosphere district, in the situation that guarantees the cement kiln process condition, greatly reduced the generation of NOx; The wind of eddy flow wind and honeycomb rotary-cut nozzle 5 ejections forms second cross jet zone, has not only replenished the recirculating zone that enough oxygen helps after-flame but also forms the flame flame core, is conducive to form stable flame.
Because eddy flow wind overcoat is inboard by being processed with the inclined plane through the position of eddy flow wind jet expansion end face, can adjust by regulating whirlwind nozzle axial location the discharge area of axial flow wind, as shown in Figure 3, this moment, axial flow wind area was maximum, as shown in Figure 4, this moment, axial flow wind area was minimum, thereby adjusted the area ratio of axial flow wind and eddy flow wind, finish the jet situation of adjusting first cross jet zone, reached the needs that adapt to the variety classes coal dust firing.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.
Claims (2)
1. a rotary kiln cross jet formula is hanged down indole energy coal burner, it is characterized in that, comprise from inside to outside coaxial package adjustable cyclone together, coal wind nozzle, axial flow wind nozzle and axial flow wind overcoat, form the axial flow air channel between described axial flow wind overcoat and the axial flow wind nozzle, form the coal air channel between described axial flow wind nozzle and the coal wind nozzle, form the eddy flow air channel between described coal wind nozzle and the adjustable cyclone, described adjustable cyclone inside is coaxially arranged with honeycomb rotary-cut nozzle, described honeycomb rotary-cut nozzle center place is connected with ignition channel, and described eddy flow wind overcoat is inboard by being processed with the inclined plane through the position of eddy flow wind jet expansion end face.
2. the low indole energy of a kind of rotary kiln cross jet formula according to claim 1 coal burner is characterized in that described honeycomb rotary-cut nozzle comprises axial flow hole, axial flow hole, whirl hole three-decker from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220459736.1U CN202792007U (en) | 2012-09-11 | 2012-09-11 | Crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220459736.1U CN202792007U (en) | 2012-09-11 | 2012-09-11 | Crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202792007U true CN202792007U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220459736.1U Expired - Lifetime CN202792007U (en) | 2012-09-11 | 2012-09-11 | Crossed-jetting-type low-nitrogen energy-saving pulverized coal burner for rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202792007U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180165A (en) * | 2015-08-11 | 2015-12-23 | 河南汇金智能装备有限公司 | Burner |
| CN109059534A (en) * | 2018-06-12 | 2018-12-21 | 湖北锋焰机电科技有限公司 | A kind of adjustable energy-efficient rotary kiln burner |
| CN106907706B (en) * | 2017-04-20 | 2023-12-08 | 烟台龙源电力技术股份有限公司 | Ignition device and combustor |
-
2012
- 2012-09-11 CN CN201220459736.1U patent/CN202792007U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180165A (en) * | 2015-08-11 | 2015-12-23 | 河南汇金智能装备有限公司 | Burner |
| CN106907706B (en) * | 2017-04-20 | 2023-12-08 | 烟台龙源电力技术股份有限公司 | Ignition device and combustor |
| CN109059534A (en) * | 2018-06-12 | 2018-12-21 | 湖北锋焰机电科技有限公司 | A kind of adjustable energy-efficient rotary kiln burner |
| CN109059534B (en) * | 2018-06-12 | 2024-02-23 | 湖北锋焰机电科技有限公司 | Adjustable high-efficiency energy-saving rotary kiln burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |