CN110440281A - A kind of averaging type secondary air box for W flame boiler - Google Patents
A kind of averaging type secondary air box for W flame boiler Download PDFInfo
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- CN110440281A CN110440281A CN201910771110.0A CN201910771110A CN110440281A CN 110440281 A CN110440281 A CN 110440281A CN 201910771110 A CN201910771110 A CN 201910771110A CN 110440281 A CN110440281 A CN 110440281A
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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
- F23L9/06—Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air into the fire bed
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
A kind of averaging type secondary air box for W flame boiler, the present invention relates to a kind of secondary air box, present invention aim to address air quantity in existing W flame boiler secondary bellows to gradually decrease from two sides to center causes to lack wind in the middle part of burner hearth and then leads to the problem that CO discharge amount is high and fly ash combustible material phosphorus content is high, it includes top bellows, lower part bellows, overfire air port, lower part bellows partition on arch, encircles lower overfire air port and encircle lower secondary air register, it further includes upper lower bellows demarcation plate, top bellows partition, crosswind door and small air duct；Upper lower bellows demarcation plate is mounted between top bellows and lower part bellows, top bellows are divided into main arch portion air compartment and two sides arch air compartment by two top bellows partitions, multiple ventilation openings are machined on upper lower bellows demarcation plate below the air compartment of each side arch, a small air duct is correspondingly provided with below each ventilation opening, the top in small air duct is fixedly connected with upper lower bellows partition bottom, and the present invention is used for station boiler field.
Description
Technical field
The present invention relates to a kind of secondary air box, and in particular to a kind of averaging type secondary air box for W flame boiler.
Background technique
W flame boiler is a kind of station boiler for aiming at low volatile unburnable coal and designing.It has burner hearth temperature
The advantages that degree is high, breeze airflow fire stroke is long.China drew from the areas such as north African and West Europe since the nineteen nineties
Into W flame boiler.Since the anthracite and meager coal resource reserve of China are abundant, and relatively other steam coals are cheap,
Therefore W flame boiler is just used widely quickly, becomes one of main type of furnace of thermal power generation.By the end of currently, China exists
It builds and has been over 130 with built W flame boiler, total installation of generating capacity is more than 41000MW, accounts for the total ownership in the world
80%.
The air feed system of W flame boiler is made of First air and secondary air system two parts.Wherein secondary air system is main
Including structures such as blower, air preheater, secondary air box, air ducts.Secondary Air is introduced by blower, and Secondary Air is entered after air preheater heats
Case is distributed by secondary air box to the overfire air port of each group burner, provides necessary air for the burning of coal dust.Therefore, two
The structure of secondary bellows is most important to the adjustment of combustion case in the distribution of W flame boiler secondary air and furnace.As shown in Figure 1, mesh
Before, the secondary air box of power plant's active service W flame boiler is usually integrated, between top bellows 1 and lower part bellows 13 mutually
Connection, after Secondary Air enters top bellows 1 from two sides, a part is entered on burner arches at different levels by encircleing upper overfire air port 9
Overfire air port is shown in that Fig. 2, another part enter lower part bellows 13, is encircleed lower secondary air register 12 and enters secondary air chamber 14 under each arch
It is interior, it finally feeds overfire air port under arches at different levels and sees Fig. 3.However, since the furnace width of W flame boiler is larger, Secondary Air into
Enter to gradually decrease from two sides to central air quantity after bellows and see Fig. 4, easily causes and lack wind in the middle part of burner hearth, temperature distribution is non-uniform, most
Cause boiler CO discharge amount high eventually and fly ash combustible material phosphorus content height.For this problem, the common solution of power plant is root
Increase the secondary air register aperture in the middle part of burner hearth according to operating experience.It is lacked in the middle part of burner hearth although this method can mitigate to a certain extent
The problem of wind, but the control difficulty of Secondary Air increases, and is unfavorable for reducing the emission level of NOx.In addition, using burnout degree
On the W flame boiler of structure, a part of Secondary Air is displaced downwardly to arch or upper furnace from arch, and the regulation difficulty of Secondary Air further increases
Add, then is easy to cause burnout degree and arch by the way of gradually opening big secondary air register to center from two sides, encircles lower secondary air separating
With disorder, can not effectively solve to lack wind in the middle part of burner hearth and the CO discharge amount height resulted from and fly ash combustible material phosphorus content height etc.
Problem.Therefore, in order to guarantee the equilibrium assignment of boiler each group burner Secondary Air, it is necessary to develop novel W flame boiler two
Secondary bellows.
Summary of the invention
Being gradually decreased from two sides to center present invention aim to address air quantity in existing W flame boiler secondary bellows causes
Wind is lacked in the middle part of burner hearth and then leads to the problem that CO discharge amount is high and fly ash combustible material phosphorus content is high, and then is provided a kind of for W fire
The averaging type secondary air box of flame boiler.
The present invention in order to solve the above problem and the technical solution adopted is that:
It includes top bellows, lower part bellows, on multiple arches under overfire air port, multiple lower part bellows partitions, multiple arches
Secondary air register under overfire air port and multiple arches, it further includes upper lower bellows demarcation plate, two top bellows partitions, two crosswind
Door and multiple small air ducts；Top bellows are mounted on above the bellows of lower part, and upper lower bellows demarcation plate is mounted on top bellows and lower part
Between bellows, two top bellows partitions are mounted on the bellows inner sidewall of top relatively and will be upper by two top bellows partitions
Portion's bellows are divided into main arch portion air compartment and two sides arch air compartment, and each side arch air compartment is equipped with a crosswind door, on multiple arches
Overfire air port is mounted on the side wall of top bellows, and multiple lower part bellows partition side by side parallel are mounted on the inside of lower part bellows
It is divided into secondary air chamber under multiple arches on wall and by lower part bellows, is processed on the upper lower bellows demarcation plate below the air compartment of each side arch
There are multiple ventilation openings, multiple ventilation openings, each ventilation opening lower section are machined on the upper lower bellows demarcation plate below main arch portion air compartment
It is correspondingly provided with a small air duct, the top in small air duct is fixedly connected with upper lower bellows partition bottom, each small air duct bottom end pair
One should be equipped with and encircle lower secondary air register, secondary air register encircles lower overfire air port with one respectively and is connected under each arch, under each arch
Overfire air port is mounted on the side wall of lower part bellows, and the top of secondary air chamber under arch is arranged in each small air duct.
Beneficial effects of the present invention:
1, the high temperature Secondary Air heated in the application through air preheater enters wind by the main air duct of secondary air box two sides
Three strands, which are divided into, by crosswind door 5 after case respectively enters three arch air compartments.Wind indoor Secondary Air a part in arch passes through on arch
Overfire air port 9 feeds burner hearth, and another part is by being encircleed lower secondary air register by ventilation opening 8 on bellows partition and small air duct 10
It is uniformly fed along furnace chamber width in the lower secondary air chamber 14 of each arch of lower part bellows, final distribution to Secondary Air under each arch is sprayed
Mouthful, feed burner hearth.
2, secondary air box is divided into the independent wind-supply unit of multiple groups along furnace chamber width, it is ensured that Secondary Air is from bellows two
Side can evenly distribute after entering to the air compartment of each burner, effectively prevent the generation that wind problem is lacked in the middle part of burner hearth.
1. the overfire air port wind pressure and wind speed of the 1st group of bellows inlet burner increase substantially.
As shown in Figure 1, being interconnected between the bellows of traditional W flame boiler top and the bottom, air duct of the Secondary Air from bellows two sides
Entrance is spread after feeding into entire bellows.Since bellows sectional area is about 3 times of tunnel inlet section, Secondary Air feeds bellows
Wind pressure reduces rapidly afterwards, and wind speed is lower at overfire air port on the arch of the 1st burner in bellows two sides inlet, under encircleing, wind
It measures less.
Secondary air box is integrally divided into 2 two parts of top bellows 1 and lower part bellows by lower bellows demarcation plate 7 in the present invention,
See Fig. 5.Wherein, top bellows 1 are divided into a main arch portion air compartment 3 and two sides arch air compartment by two top bellows partitions 2
4.Under the blocking of partition, Secondary Air is introduced into 1 three, top bellows relatively narrow arch air compartments after being fed by air duct, warp
Ventilation opening 8 and small air duct 10 enter lower part bellows 2.Since the tunnel inlet sectional area of bellows two sides is always cut with arch air compartment entrance
Area is identical, and on-way resistance is smaller, and wind pressure still keeps higher level after Secondary Air is fed.The combustion of first group of bellows two sides inlet
On the arch of burner, encircleing wind pressure at lower overfire air port, compared with significantly improving before being transformed, air quantity is larger.
2. occurring the high wind pressure band with inlet equivalence in the middle part of bellows, burner hearth center air quantity is significantly increased.
As shown in figure 4, traditional W flame boiler secondary bellows are supplied according to wind pressure gradient into burner hearth along furnace chamber width
Wind.Since furnace width is larger, with the increase of air feed distance, on-way resistance increases, and a large amount of Secondary Airs from bellows entrance to
From overfire air port is lost step by step along the arch of journey, under encircleing in central flow process, secondary wind pressure is reduced rapidly.Along furnace width
Only there are two high pressure belts in bellows two sides inlet in direction.Wind pressure drops to reduced levels when Secondary Air reaches burner hearth center.
Through drag evaluation, the 10% of upper, the lower overfire air port of arch the total secondary air flow of deficiency in draught of arch in the middle part of burner hearth, breeze airflow is in
It burns in the environment of fuel-rich hypoxemia, generates a large amount of CO, be unfavorable for the after-flame of coal dust.
As shown in figure 8, after applying the present invention, the Secondary Air in the middle part of burner hearth is individually supplied by main arch portion air compartment 3.Due to top
The barrier of bellows partition 2, wind pressure decaying is slower in flow process in air compartment for Secondary Air.Also, main arch portion air compartment 3 and side arch
Air compartment 4 is in parallel connection.Secondary Air be divided under the regulation of crosswind door 5 after feeding bellows from two sides air duct three stocks not into
It becomes owner of in arch air compartment 3 and two sides arch air compartment 4.The process flowed due to autonomous 3 both ends of arch air compartment of Secondary Air to center
Middle no air quantity is lost, and secondary wind pressure only slightly reduces under the influence of on-way resistance.Therefore 3 two sides of main arch portion air compartment arch is upper secondary
Wind snout and the corresponding wind pressure for encircleing lower overfire air port and the 1st group of bellows two sides inlet burner arch are upper, encircle lower Secondary Air
Nozzle wind pressure is almost the same, 4 high pressure belts occurs along furnace chamber width.Through drag evaluation, the air quantity in the middle part of burner hearth is significant
Increase to 30% or so.
3. each indoor wind pressure gradient difference of arch wind significantly reduces, distributed along furnace chamber width secondary air flow more equal
It is even.
As shown in figure 4, the air feed between the low wind pressure band of traditional W flame boiler secondary bellows two sides inlet high pressure band and center
Distance is the half of bellows overall width.It is separated between the bellows of upper and lower part by partition after applying the present invention, Secondary Air is in top bellows
The on-way resistance of interior flowing reduces, and the air feed length of main arch portion air compartment 3 and side arch air compartment 4 shorten to former bellows length
One third is shown in Fig. 8.Through drag evaluation, the wind pressure gradient difference in 3 two sides of main arch portion air compartment and center is reduced to former wind pressure gradient difference
30%, the wind pressure gradient difference in two sides arch air compartment 4 is reduced to the 60% of former wind pressure gradient difference；Encircle lower overfire air port with
The corresponding upper overfire air port wind pressure of arch is equal, and the uniformity along the distribution of furnace chamber width secondary air flow significantly improves.Each arch
Overfire air port 11 and each burning is finally fed under the indoor Secondary Air of wind is evenly distributed through ventilation opening 8 and small air duct 10 to each arch
Device, and then effectively change W flame boiler and show along the air distribution that furnace chamber width secondary air flow is gradually decreased from two sides to center
Shape, the O in the middle part of burner hearth2Concentration improves, and CO concentration reduces, and may advantageously facilitate the after-flame of breeze airflow, reduces furnace outlet flying dust
Combustible phosphorus content and O2Concentration.
2. the present invention does not change the structure of traditional secondary bellows, only it is transformed in traditional inner bellows, secondary air bellow
Air supply ability be substantially unaffected；And the present invention is not required to the air feed system outside change bellows, and cost is low, application
By force.
Detailed description of the invention
Fig. 1 is existing W flame boiler secondary bellows cross-sectional view.
Fig. 2 is the A of Fig. 1 to cross-sectional view.
Fig. 3 is the B of Fig. 1 to cross-sectional view.
Fig. 4 is the Flow Field Distribution pressure head schematic diagram in existing W flame boiler secondary bellows.
Fig. 5 is structural schematic diagram of the invention.
Fig. 6 is the C of Fig. 5 to cross-sectional view.
Fig. 7 is the D of Fig. 5 to cross-sectional view.
Fig. 8 is the Flow Field Distribution pressure head schematic diagram in secondary air box of the present invention.
Specific embodiment
Specific embodiment 1: illustrating that present embodiment, one kind described in present embodiment are used for W flame in conjunction with Fig. 5-Fig. 7
The averaging type secondary air box of boiler, it includes top bellows 1, lower part bellows 13, overfire air port 9, multiple lower parts on multiple arches
Secondary air register 12 under overfire air port 11 and multiple arches under bellows partition, multiple arches, it further includes upper lower bellows demarcation plate 7, two
2, two crosswind doors 5 of a top bellows partition and multiple small air ducts 10；Top bellows 1 are mounted on 13 top of lower part bellows, up and down
Bellows demarcation plate 7 is mounted between top bellows 1 and lower part bellows 13, and two top bellows partitions 2 are opposite to be mounted on top wind
Top bellows 1 are divided to for main arch portion air compartment 3 and two sides arch air compartment on 1 inner sidewall of case and by two top bellows partitions 2
4, each side arch air compartment 4 is equipped with a crosswind door 5, and overfire air port 9 is mounted on the side wall of top bellows 1 on multiple arches
On, multiple lower part bellows partition side by side parallel are mounted on the inner sidewall of lower part bellows 13 and lower part bellows 13 are divided into multiple arches
Lower secondary air chamber 14 is machined with multiple ventilation openings 8, main arch portion wind on the upper lower bellows demarcation plate 7 of the lower section of each side arch air compartment 4
Multiple ventilation openings 8 are machined on the upper lower bellows demarcation plate 7 of 3 lower section of room, a small air duct is correspondingly provided with below each ventilation opening 8
10, the top in small air duct 10 is fixedly connected with upper 7 bottom end of lower bellows demarcation plate, and each small 10 bottom end of air duct is correspondingly provided with an arch
Lower secondary air register 12, secondary air register 12 encircles lower overfire air port 11 with one respectively and is connected under each arch, Secondary Air under each arch
Spout 11 is mounted on the side wall of lower part bellows 13, and the top of secondary air chamber 14 under arch is arranged in each small air duct 10.
Specific embodiment 2: illustrating that present embodiment, one kind described in present embodiment are used for W flame in conjunction with Fig. 5 and Fig. 6
The averaging type secondary air box of boiler, it further includes four wind measuring devices 6, and the two sides of main arch portion air compartment 3 are respectively equipped with a survey wind
Device 6 is equipped with a wind measuring device 6 close to crosswind door 5 on each side arch air compartment 4, and each indoor air quantity of arch wind is according to three
Equipartition principle determines: i.e. by adjusting 5 aperture of crosswind door, the air quantity in three wind-supply units is always consistent.Other methods
It is same as the specific embodiment one.
Specific embodiment 3: illustrating that present embodiment, one kind described in present embodiment are used for W flame in conjunction with Fig. 1-Fig. 2
The averaging type secondary air box of boiler, top bellows partition 2 include straight panel and bent plate, the fixed company in one end of straight panel and one end of bent plate
It connects, the other end of straight panel and the other end of bent plate are fixedly connected with 1 inner sidewall of top bellows.Other methods and specific embodiment party
Formula one is identical.
Specific embodiment 4: one kind described in embodiment is described with reference to Fig.5, present embodiment is used for W flame boiler
Averaging type secondary air box, two sides arch air compartment 4 is symmetricly set on the two sides of main arch portion air compartment 3.Other methods and specific reality
It is identical to apply mode one.
Embodiment:
The present invention is on one 300MW FW W flame boiler produced by Foster Wheeler company, the U.S. of certain power plant
Using arch has been arranged symmetrically 12 groups of bispin air duct air-coal separating coal burners before and after boiler.After applying the present invention, boiler secondary
Away from bellows partition is added at the position 2307mm at the top of bellows in bellows, secondary air box is integrally divided into top bellows and lower part wind
Case two parts.Its middle and upper part bellows is divided into a main arch portion air compartment and two sides arch air compartment by two top bellows partitions.
The inlet of each side arch air compartment is equipped with one group of crosswind door and actuator.Main arch portion air compartment and side arch air compartment both ends enter
Apparatus for measuring air quantity is equipped at mouthful.Two side throttle openings are 50% in boiler actual motion, and each arch wind is indoor
Air quantity is 30% or so of total secondary air flow, respectively 4 groups of burner air feeds.Partition between the bellows of upper and lower part is equipped with
12 long 1150mm, wide 420mm rectangular vent.Partition bottom is equipped with 12 arches in 12 small air ducts of rectangle and lower part bellows
Lower secondary air chamber corresponds.Small tunnel inlet is connect with ventilation opening, and outlet extends at the top of the lower secondary air chamber of arch.Secondary Air is certainly
Two sides, which enter after bellows, is divided into three arch air compartments, then evenly distributes to 12 and encircles lower secondary air chamber, supplies for each burner
Wind.
Before the present invention, along furnace chamber width, the 1st group of bellows two sides inlet burner arch is upper, encircles lower Secondary Air
Secondary wind pressure highest in spout, about 12KPa.Measurement discovery, region CO content at the position water-cooling wall 1m are about
350ppm；As Secondary Air is flowed from two side of bellows to center, secondary wind pressure is reduced rapidly, and reaches the burning of the 6th, burner hearth center
On the arch of device when secondary air nozzle position, secondary wind pressure is reduced to 3KPa, and corresponding position CO content is up to 1200ppm.Front-back wall
The 5th~8, middle part burner encircles upper, the lower secondary air flow of arch and the only total secondary air flow 9.3% of Zhan, the O of furnace outlet2Content is about
5.6%, fly ash combustible material phosphorus content is about 5.89%.
Burner hearth front-back wall two sides first are encircleed secondary wind pressure at upper secondary air nozzle position and are increased to after applying the present invention
14KPa, the 5th, the 8th burner of main arch portion air compartment two sides encircle secondary wind pressure at upper secondary air nozzle position and reach 12KPa,
Between four burners arch on, encircle lower secondary air flow and be promoted to the 31.5% of total secondary air flow.It is each to fire along furnace chamber width
Burner arch is upper, CO content is about the wind pressure of the lower overfire air port of arch at the position water-cooling wall 1m in 8KPa or more, burner hearth
500ppm, furnace outlet O2Content is reduced to 3.8%, and fly ash combustible material phosphorus content is reduced to 4.28%.
The total secondary air flow of boiler is 1047.832t/h before using the present invention, and total secondary air flow is after applying the present invention
1022.313t/h, total secondary air flow is basically unchanged after windbox modifications, and the air supply ability of boiler is unaffected.In addition, windbox modifications
Cost is relatively low, and the transformation period is only or so January, and application is stronger.
Claims (4)
1. a kind of averaging type secondary air box for W flame boiler, it includes top bellows (1), lower part bellows (13), multiple arches
Secondary air register under overfire air port (11) and multiple arches under upper overfire air port (9), multiple lower part bellows partitions, multiple arches
(12), it is characterised in that: it further include upper lower bellows demarcation plate (7), two top bellows partitions (2), two crosswind doors (5) and
Multiple small air ducts (10)；Top bellows (1) are mounted on above lower part bellows (13), and upper lower bellows demarcation plate (7) is mounted on top
Between bellows (1) and lower part bellows (13), two top bellows partitions (2) are opposite to be mounted on top bellows (1) inner sidewall simultaneously
Top bellows (1) are divided into main arch portion air compartment (3) and two sides arch air compartment (4) by two top bellows partitions (2), each
Side arch air compartment (4) is equipped with a crosswind door (5), and overfire air port (9) is mounted on the side wall of top bellows (1) on multiple arches
On, multiple lower part bellows partition side by side parallel are mounted on the inner sidewall of lower part bellows (13) and are divided into lower part bellows (13) more
Secondary air chamber (14) under a arch are machined with multiple ventilation openings on the upper lower bellows demarcation plate (7) below each side arch air compartment (4)
(8), it is machined with multiple ventilation openings (8) on the upper lower bellows demarcation plate (7) below main arch portion air compartment (3), under each ventilation opening (8)
Side is correspondingly provided with one small air duct (10), and the top of small air duct (10) is fixedly connected with upper lower bellows demarcation plate (7) bottom end, each
Small air duct (10) bottom end is correspondingly provided with one and encircles lower secondary air register (12), and secondary air register (12) is respectively and under an arch under each arch
Overfire air port (11) is connected to, and overfire air port (11) is mounted on the side wall of lower part bellows (13) under each arch, each small wind
The top of secondary air chamber (14) is arranged under arch in road (10).
2. a kind of averaging type secondary air box for W flame boiler according to claim 1, it is characterised in that: it further includes
Four wind measuring devices (6), the two sides of main arch portion air compartment (3) are respectively equipped with a wind measuring device (6), each side arch air compartment (4)
It is upper to be equipped with a wind measuring device (6) close to crosswind door (5).
3. a kind of averaging type secondary air box for W flame boiler according to claim 1, it is characterised in that: top bellows
Partition (2) includes straight panel and bent plate, and one end of straight panel is fixedly connected with one end of bent plate, the other end of straight panel and bent plate it is another
End is fixedly connected with top bellows (1) inner sidewall.
4. a kind of averaging type secondary air box for W flame boiler according to claim 1, it is characterised in that: two side arches
Portion's air compartment (4) is symmetricly set on the two sides of main arch portion air compartment (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771110.0A CN110440281B (en) | 2019-08-20 | 2019-08-20 | A equally divide formula secondary bellows for W flame boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771110.0A CN110440281B (en) | 2019-08-20 | 2019-08-20 | A equally divide formula secondary bellows for W flame boiler |
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| CN110440281A true CN110440281A (en) | 2019-11-12 |
| CN110440281B CN110440281B (en) | 2020-10-27 |
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ID=68436780
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|---|---|---|---|---|
| JPH1061911A (en) * | 1996-08-21 | 1998-03-06 | Ebara Boiler Kk | Burner device |
| CN1896592A (en) * | 2006-05-26 | 2007-01-17 | 哈尔滨工业大学 | W-type flame incinerator by low-NOx coal powder |
| CN101324340A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Apparatus for adjusting secondary wind direction under W type flame oven arch |
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| CN102705816A (en) * | 2012-06-27 | 2012-10-03 | 哈尔滨工业大学 | W flame boiler combustion optimizing device |
| CN103225818A (en) * | 2013-04-09 | 2013-07-31 | 湖南省湘电试研技术有限公司 | Secondary air box structure of coal-fired W-flame boiler in power station |
| CN103672950A (en) * | 2013-10-17 | 2014-03-26 | 贵州电力试验研究院 | Method for combustion adjustment of W-type flame furnace with under-arch secondary air at adjustable down-dip angle |
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2019
- 2019-08-20 CN CN201910771110.0A patent/CN110440281B/en active Active
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|---|---|---|---|---|
| JPH1061911A (en) * | 1996-08-21 | 1998-03-06 | Ebara Boiler Kk | Burner device |
| CN1896592A (en) * | 2006-05-26 | 2007-01-17 | 哈尔滨工业大学 | W-type flame incinerator by low-NOx coal powder |
| CN101324340A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Apparatus for adjusting secondary wind direction under W type flame oven arch |
| CN202082915U (en) * | 2011-05-27 | 2011-12-21 | 烟台龙源电力技术股份有限公司 | W-shape flame boiler with grading secondary air layout structure |
| CN102705816A (en) * | 2012-06-27 | 2012-10-03 | 哈尔滨工业大学 | W flame boiler combustion optimizing device |
| CN103225818A (en) * | 2013-04-09 | 2013-07-31 | 湖南省湘电试研技术有限公司 | Secondary air box structure of coal-fired W-flame boiler in power station |
| CN103672950A (en) * | 2013-10-17 | 2014-03-26 | 贵州电力试验研究院 | Method for combustion adjustment of W-type flame furnace with under-arch secondary air at adjustable down-dip angle |
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| CN110440281B (en) | 2020-10-27 |
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