CN106016257B - A kind of burnout degree method for arranging of Opposite Firing Boiler - Google Patents
A kind of burnout degree method for arranging of Opposite Firing Boiler Download PDFInfo
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- CN106016257B CN106016257B CN201610335920.8A CN201610335920A CN106016257B CN 106016257 B CN106016257 B CN 106016257B CN 201610335920 A CN201610335920 A CN 201610335920A CN 106016257 B CN106016257 B CN 106016257B
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- burnout degree
- layer
- burnout
- burner hearth
- arranging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
- F23L9/04—Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air beyond the fire, i.e. nearer the smoke outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/10—Nozzle tips
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a kind of burnout degree method for arranging, and a kind of burnout degree method for arranging of Opposite Firing Boiler is disclosed, the combustion system of boiler burns for opposed firing, horizontal burnout degree（8）Successively arranged corresponding to each main burner layer, and horizontal burnout degree（8）It is blown into being diagonal to the wind direction in this layer of combustion flame direction in burner hearth, every layer of horizontal burnout degree (8) is made up of 4 burnout degrees, every burnout degree is divided into 3 strands of wind and strengthens changing step by step along its rigidity of combustion flame direction again, one layer of vertical burnout degree (9) is disposed with above top layer combustion flame in burner hearth, its wind direction is parallel with combustion flame direction.The burnout degree method for arranging of the Opposite Firing Boiler of the present invention can efficiently solve burner hearth side water wall high temperature corrosion, while can also reduce NOXDischarge.
Description
Technical field
The present invention relates to a kind of burnout degree method for arranging, the burnout degree arrangement of especially a kind of Opposite Firing Boiler
Method.
Background technology
At present, China 600MW, 1000MW unit plants boiler generally use is opposed firing swirl flow combustion technology,
And the boiler of hundreds of this kind of forms that put into operation, the running situation of the Opposite Firing Boiler to have been put into operation from these are come
See, the properties of boiler can reach design requirement, and it has the advantages that low-load combustion-stabilizing is strong, modulability is good, but should
Kind burning boiler is generally only disposed with burnout degree above main burner layer, and the burnout degree of this arrangement cannot be guaranteed burner hearth
Interior coal dust is completely burned off in the presence of burner, and uncombusted coal dust will move to burner hearth both walls in burner hearth, cause
Both walls water-cooling wall is washed away, due to containing element sulphur in coal dust, with the iron in side water wall chemistry occurs for element sulphur instead
Ferrous sulfide should be generated, so that the wall thickness of water-cooling wall is thinning, influences the security of boiler operatiopn.Later stage is in order to solve burner hearth side
The High Temperature Corrosion of wall water-cooling wall, generally use arrange the mode of adherent wind to solve, and the arrangement of adherent wind is：In pot
If on the forward and backward wall of stove burner hearth respectively close to arranged on left and right sides wall positional symmetry be disposed with the adherent wind of dried layer, by arranging this kind
The after-flame of coal dust in the adherent wind energy enhancing burner hearth of mode, the high temperature for reducing both walls water-cooling wall to a certain extent are rotten
Erosion, but because the stiff problem of the adherent wind of this kind of arrangement can not be resolved, prevent it from covering both sides well
Corrode heavier region in the middle part of wall so that side water wall High Temperature Corrosion can not be solved thoroughly, further, since patch
The arrangement of wall wind is：Positional symmetry respectively close to arranged on left and right sides wall on the forward and backward wall of boiler furnace is arranged so that stove
It is more serious that wind is lacked in the middle part of thorax, the burning of coal dust is influenceed, causes NOXDischarge capacity it is higher.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of burnout degree method for arranging of Opposite Firing Boiler,
The corruption of side water wall high temperature can be efficiently solved by employing the Opposite Firing Boiler of the burnout degree method for arranging of the present invention
Erosion problem, while NO can also be reducedXDischarge.
The technical solution adopted for the present invention to solve the technical problems is：A kind of burnout degree of Opposite Firing Boiler
Method for arranging, the combustion system of boiler are burnt for opposed firing, and horizontal burnout degree is successively arranged corresponding to each main burner layer,
The arrangement of nozzles of horizontal burnout degree is on arranged on left and right sides wall, and horizontal burnout degree is to be diagonal to the wind direction in this layer of combustion flame direction
It is blown into burner hearth, so-called oblique means that there is acute angle in mutually adjacent horizontal burnout degree direction and main burner flame direction
Angle α, every burnout degree are strengthened changing step by step along its rigidity of combustion flame direction.
Further, every layer of horizontal burnout degree is made up of 4 burnout degrees, and 4 burnout degrees are respectively from burner hearth left and right two
On side wall close to forward and backward wall in corresponding main burner layer height identical position to be diagonal to this layer of combustion flame direction
Wind direction be blown into burner hearth, every burnout degree is divided into 3 strands of wind and strengthens changing step by step along its rigidity of combustion flame direction again.
Further, 3 strands of wind of every burnout degree are by being arranged on side by side three highly consistent with this layer of main burner
Nozzle sprays, and the height of this 3 nozzles is identical, and width gradually increases along combustion flame direction.
Further, one layer of vertical burnout degree, the vertical burnout degree of the layer are disposed with above top layer combustion flame in burner hearth
Wind direction it is parallel with combustion flame direction and it blows to burner hearth center from the forward and backward wall of burner hearth respectively, the air quantity point of vertical burnout degree
Cloth is so that both sides are weak, middle strong formal distribution along stove cross direction.
Further, the vertical burnout degree is sprayed by two layers adjacent of vertical burnout degree nozzle, and wherein upper vertical is fired
Wind nozzle quantity to the greatest extent is less than lower vertical burnout degree nozzle quantity.
Further, the main burner number of plies and the horizontal burnout degree of corresponding arrangement being arranged on the forward and backward wall of burner hearth
The number of plies is 3 layers.
The beneficial effects of the invention are as follows：The burnout degree method for arranging of the Opposite Firing Boiler of the present invention can be effectively
Solve burner hearth side water wall high temperature corrosion, while NO can also be effectively reducedXDischarge.
Brief description of the drawings
Fig. 1 is the structural representation of boiler furnace.
Fig. 2 is the front view of burner hearth.
Fig. 3 is the top view of horizontal burnout degree method for arranging.
Fig. 4 is the side view of vertical burnout degree method for arranging.
In figure mark for：1- front walls, wall after 2-, the right walls of 3-, the vertical burnout degree nozzles of 4-, the horizontal burnout degree nozzles of 5-, 6-
Main burner, the left walls of 7-, the horizontal burnout degrees of 8-, the vertical burnout degrees of 9-.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in Figure 1 to 4, the burnout degree method for arranging of a kind of Opposite Firing Boiler of the invention, boiler
Combustion system burns for opposed firing, and boiler is Opposite Firing Boiler, and boiler furnace is shaped as cuboid, level
Burnout degree 8 is successively arranged in boiler furnace corresponding to each main burner layer, and the arrangement of nozzles of horizontal burnout degree 8 is left and right two
On side wall, horizontal burnout degree 8 is blown into burner hearth with being diagonal to the wind direction in this layer of combustion flame direction, and every burnout degree is along burning
Its rigidity of flame direction strengthens change step by step.One layer of vertical burnout degree 9, the layer are disposed with above top layer combustion flame in burner hearth
The wind direction of vertical burnout degree 9 is parallel with combustion flame direction and it blows to burner hearth center, vertical after-flame from the forward and backward wall of burner hearth respectively
The air volume adjustment of wind 9 is so that both sides are weak, middle strong formal distribution along stove cross direction.The master being arranged on the forward and backward wall of burner hearth
The number of plies of horizontal burnout degree 8 of the burner number of plies and corresponding arrangement is 3 layers.
The specific implementation process of the present invention is as follows：
As shown in Figure 1 to 4, it is arranged symmetrically first on the front wall 1 and rear wall 2 of Opposite Firing Boiler burner hearth
3 layers of main burner layer, every layer has 5 main burners 6, then on the left side wall 7 of burner hearth and right-side wall 3 respectively close to it before,
Arrange afterwards the positional symmetry of wall with one-to-one 3 layers horizontal burnout degree nozzle 5 of 3 layers of main burner layer, in order to clearer
Illustrate the arrangement of every layer of horizontal burnout degree nozzle 5, now come specifically with the arrangement of the horizontal burnout degree nozzle 5 of the superiors
Bright, remaining 2 layers arrangement is identical with this layer.The horizontal burnout degree nozzle 5 for being arranged in the superiors shares 4 groups of burnout degree sprays
Mouth, 4 groups of burnout degree nozzles are arranged on burner hearth arranged on left and right sides wall respectively close to its forward and backward wall and the superiors' main burning
The position of device layer sustained height, every group of foregoing burnout degree nozzle are made up of 3 nozzles again, and nozzle is shaped as cuboid,
This 3 nozzle side-by-side parallel arrangements, and make the flash of nozzle consistent with the flash of burner hearth, the 3 strands of wind point sprayed from this 3 nozzles
It is not blown into the presence of its guide plate with being diagonal to the wind direction in this layer of combustion flame direction in the middle part of burner hearth, and 3 bursts of wind edges
Combustion flame direction, it rigidly strengthens step by step, and oblique herein is determined according to factors such as the size of burner hearth, the species of coal dust
Determine the angle of oblique, it rigidly strengthens step by step along combustion flame direction along with 3 strands of wind so that 4 burnout degrees exist
It can form bellows chamber dry simultaneously in the case of and wrap up in coal dust, moreover it is possible to it is weak, middle strong that both sides are formed on burner hearth arranged on left and right sides wall
The air volume adjustment of pulverized coal flame is caught up with wind, is made so as to strengthen the after-flame of coal dust, to prevent coal dust uncombusted in burner hearth from washing away two
Side water wall and cause high temperature corrosion, side water wall High Temperature Corrosion can be efficiently solved, while also can be in certain journey
NO is reduced on degreeXDischarge；In addition, the horizontal burnout degree nozzle 5 of the present invention shows using the nozzle with compared with large ratio of height to width
So, this depth-width ratio of nozzle is determined according to the factor such as the size of burner hearth and the species of coal dust, when nozzle have it is higher
Height after it is ensured that from nozzle spray after-flame wind energy cover combustion flame layer adjacent thereto, meanwhile, in order that from
Along combustion flame direction, it rigidly strengthens 3 strands of wind that 3 foregoing nozzles spray step by step, has in 3 nozzles larger high wide
Than on the premise of, by keeping the height of 3 nozzles constant, the width of 3 nozzles is gradually increased further along combustion flame direction
It is big to realize.
2 layers are disposed with the front wall 1 and rear wall 2 of burner hearth above the superiors' main burner layer suitable positional symmetry
Vertical burnout degree nozzle 4, wherein upper vertical burnout degree nozzle 4 is made up of 3 nozzles and it is located in same horizontal line, lower floor
Vertical burnout degree nozzle 4 is made up of 5 nozzles and it is located in same horizontal line, and nozzle is shaped as cylindrical shape, described upper and lower
Two layers of neighboring vertical burnout degree 4 spacing distance of nozzle is shorter, the vertical after-flame sprayed from upper and lower two layers vertical burnout degree nozzle 4
The wind direction of wind 9 is parallel with combustion flame direction and it blows to burner hearth center from the forward and backward wall of burner hearth respectively, due to upper and lower two layers
Neighboring vertical burnout degree 4 spacing distances of nozzle are shorter, so the burnout degree sprayed from this two layers vertical burnout degree nozzle 4 can regard
For one layer of vertical burnout degree 9, it is clear that this shorter spacing distance be according to the factor such as the size of burner hearth and the species of coal dust come
Determine, furthermore, upper vertical burnout degree nozzle has 3 nozzles, and lower vertical burnout degree nozzle has 5 nozzles, so
It is the air volume adjustment that both sides are weak, centre is strong that this layer of vertical burnout degree 9, which has along stove cross direction, so can guarantee that in the middle part of burner hearth and has
There are enough air volume adjustments, so as to efficiently solve the problem of wind is lacked in the middle part of burner hearth, further strengthen the burning of coal dust, so as to drop
Low NOXDischarge, meanwhile, the part burnout degree that its both sides is distributed in this layer of vertical burnout degree 9 is that have to horizontal burnout degree
Effect supplement so that horizontal burnout degree 8 and vertical burnout degree 9 can enter burner hearth from the left and right side of burner hearth and top respectively, to protect
The multidimensional deeply staged combustion to coal dust is demonstrate,proved, so as to further reduce NOXDischarge.
Claims (6)
1. a kind of burnout degree method for arranging of Opposite Firing Boiler, the combustion system of boiler burns for opposed firing,
It is characterized in that：Horizontal burnout degree is successively arranged corresponding to each main burner layer（8）, horizontal burnout degree（8）Arrangement of nozzles exist
On arranged on left and right sides wall, horizontal burnout degree（8）It is blown into being diagonal to the wind direction in this layer of combustion flame direction in burner hearth, every layer of level
Burnout degree（8）More burnout degrees along combustion flame direction its rigidity step by step strengthen change.
2. the burnout degree method for arranging of Opposite Firing Boiler as claimed in claim 1, it is characterised in that：Every layer of level
Burnout degree（8）Be made up of 4 burnout degrees, 4 burnout degrees respectively from burner hearth arranged on left and right sides wall close to forward and backward wall in
Its corresponding main burner layer height identical position is blown into burner hearth, every combustion to be diagonal to the wind direction in this layer of combustion flame direction
Wind is divided into 3 strands of wind and strengthens changing step by step along its rigidity of combustion flame direction again to the greatest extent.
3. the burnout degree method for arranging of Opposite Firing Boiler as claimed in claim 2, it is characterised in that：Every after-flame
3 strands of wind of wind are sprayed by being arranged on side by side three nozzles highly consistent with this layer of main burner, the height phase of this 3 nozzles
Together, width gradually increases along combustion flame direction.
4. the burnout degree method for arranging of Opposite Firing Boiler as claimed in claim 1 or 2, it is characterised in that：Burner hearth
It is interior that one layer of vertical burnout degree is disposed with above top layer combustion flame（9）, the vertical burnout degree of the layer（9）Wind direction and combustion flame
Direction is parallel and it blows to burner hearth center, vertical burnout degree from the forward and backward wall of burner hearth respectively（9）Air volume adjustment be along the wide side of stove
To so that both sides are weak, middle strong formal distribution.
5. the burnout degree method for arranging of Opposite Firing Boiler as claimed in claim 4, it is characterised in that：It is described vertical
Burnout degree（9）By two layers adjacent of vertical burnout degree nozzle（4）Spray, wherein upper vertical burnout degree nozzle（4）Quantity is less than
Lower vertical burnout degree nozzle（4）Quantity.
6. the burnout degree method for arranging of Opposite Firing Boiler as claimed in claim 2, it is characterised in that：It is arranged in stove
The horizontal burnout degree of the main burner number of plies and corresponding arrangement on the forward and backward wall of thorax（8）The number of plies is 3 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610335920.8A CN106016257B (en) | 2016-05-20 | 2016-05-20 | A kind of burnout degree method for arranging of Opposite Firing Boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610335920.8A CN106016257B (en) | 2016-05-20 | 2016-05-20 | A kind of burnout degree method for arranging of Opposite Firing Boiler |
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| CN106016257A CN106016257A (en) | 2016-10-12 |
| CN106016257B true CN106016257B (en) | 2017-12-12 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106989411B (en) * | 2017-04-12 | 2024-01-19 | 西安热工研究院有限公司 | Boiler water-cooled wall air film protection device |
| CN109114588A (en) * | 2018-08-31 | 2019-01-01 | 华北水利水电大学 | It is pure to fire high-alkali coal wet bottom boiler low NOx combustion system and method for controlling combustion |
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| CN203907595U (en) * | 2014-06-13 | 2014-10-29 | 烟台龙源电力技术股份有限公司 | Boiler |
| CN203963919U (en) * | 2014-07-11 | 2014-11-26 | 东方电气集团东方锅炉股份有限公司 | Furnace wall central region is arranged the boiler of air port |
| CN104456609A (en) * | 2014-12-04 | 2015-03-25 | 中节环（北京）环境科技股份有限公司 | Combined rigidity offset secondary air nozzle |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280919A (en) * | 2008-05-07 | 2008-10-08 | 东方锅炉（集团）股份有限公司 | Forward and backward wall opposite rushing combustion boiler hearth as well as method for arranging air nozzle on side wall |
| JP2012042154A (en) * | 2010-08-20 | 2012-03-01 | Ihi Corp | Method of operating opposed firing boiler device and the opposed firing boiler device |
| CN102913898A (en) * | 2012-10-16 | 2013-02-06 | 东方电气集团东方锅炉股份有限公司 | Over-fire air distribution manner in front and back wall opposed firing boiler |
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| CN203893159U (en) * | 2014-05-15 | 2014-10-22 | 东方电气集团东方锅炉股份有限公司 | Front-back wall opposed firing boiler with closing-to-wall sidewall and auxiliary tangential air arrangement |
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| CN104456609A (en) * | 2014-12-04 | 2015-03-25 | 中节环（北京）环境科技股份有限公司 | Combined rigidity offset secondary air nozzle |
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