CN110542078A - W-shaped flame boiler device with stepped two-stage arch - Google Patents
W-shaped flame boiler device with stepped two-stage arch Download PDFInfo
- Publication number
- CN110542078A CN110542078A CN201910985333.7A CN201910985333A CN110542078A CN 110542078 A CN110542078 A CN 110542078A CN 201910985333 A CN201910985333 A CN 201910985333A CN 110542078 A CN110542078 A CN 110542078A
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- Prior art keywords
- arch
- stepped
- stage
- nozzle
- air
- Prior art date
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Links
- 239000000446 fuel Substances 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 23
- 239000002956 ash Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000010881 fly ash Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 101150097977 arch-1 gene Proteins 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a W-shaped flame boiler device with a stepped two-stage arch, which comprises a front wall water-cooled wall and a rear wall water-cooled wall which are symmetrically arranged front and back, wherein the front wall water-cooled wall and the rear wall water-cooled wall are respectively an upper hearth, a stepped two-stage arch, a lower hearth and an ash bucket section from top to bottom, a secondary over-fire air nozzle is arranged on the upper hearth, and a primary over-fire air nozzle, a multi-purpose secondary fuel nozzle, a main burner nozzle, an over-arch inner secondary air nozzle and an over-arch outer secondary air nozzle are respectively arranged on the stepped two-stage arch from top to bottom. By utilizing the staged combustion principle and changing the arrangement mode of the combustor and the air distribution, the NOx content is further reduced, the requirement of ultra-clean emission is met, the defect that the carbon content of fly ash is increased due to unmatched air distribution during staged air supply combustion is overcome, and a good effect is achieved.
Description
Technical Field
The invention relates to a boiler, in particular to a stepped two-stage arch W-shaped flame boiler device, and belongs to the technical field of boiler equipment.
Background
When the existing W-shaped flame boiler burning anthracite is in operation, the content of NOx in flue gas is high, and even after the boiler is transformed into a low-nitrogen burner, the content of NOx at the outlet of a hearth is also 800mg/m 3. Meanwhile, the over-fire air is arranged at the outlet of the hearth, and the pulverized coal is combusted in a grading manner by grading air supply, so that the content of NOx in the flue gas is reduced. In the conventional W-shaped flame boiler, the hearth space is rapidly narrowed at the upper part of the outlet of the combustor, and the space required by secondary combustion is lacked, but the conventional modification scheme reduces the NOx emission and simultaneously often causes the reduction of the combustion economy of the boiler.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the arrangement mode of burners and air distribution is changed in a burner area, the generation of NOx is reduced by utilizing the pulverized coal staged combustion principle, and the existing problems are effectively solved.
The technical scheme of the invention is as follows: the utility model provides a notch cuttype doublestage encircles "W" type flame boiler plant, it includes front wall water-cooling wall and back wall water-cooling wall of front and back symmetrical arrangement, front wall water-cooling wall and back wall water-cooling wall are from last to being last furnace, notch cuttype doublestage arch, lower furnace and ash bucket section respectively down, arrange second grade burn-out air spout at last furnace, arch at notch cuttype doublestage and arrange one-level burn-out air spout, multipurpose secondary fuel spout, main burner nozzle, arch in the secondary air spout and arch outside secondary air spout respectively from high to low.
The lower hearth is vertically arranged, secondary air nozzles under the arch are arranged at the position, close to the ash bucket, of the lower hearth, horizontal secondary air nozzles under the arch are arranged between the secondary air nozzles under the arch, and ventilation air nozzles under the arch are arranged above the secondary air nozzles under the arch.
The notch cuttype doublestage encircles including the one-level ladder hunch, water-cooling wall and second grade ladder hunch and mutual fixed connection between the two arches, the contained angle between one-level ladder hunch and the horizontal plane is tilt-up 10 ~ 20, water-cooling wall is vertical to be arranged between the two arches, the contained angle between second grade ladder hunch and the horizontal plane is tilt-up 10 ~ 20, multipurpose secondary fuel spout arranges to encircle at the one-level ladder and be close to the water-cooling wall section between the two arches, the one-level is burnt out the wind spout and is arranged to encircle at the one-level ladder and be close to the top of last furnace, the burner spout is arranged to encircle at the second grade ladder and is close to water-cooling wall section between the two arches, encircle outer overgrate wind spout is arranged to encircle at the second grade ladder and be.
The second-stage overfire air of the second-stage overfire air nozzle is sprayed in a horizontal mode, and the included angle between the axis of the first-stage overfire air nozzle and the horizontal plane is declined by 10-25 degrees.
The main burner nozzle is a circular nozzle, and the main burner is vertically arranged on the main burner nozzle.
The secondary air nozzles under the arch are of rectangular structures and are provided with air doors with declination angles of 0-55 degrees.
The multipurpose secondary fuel nozzle is provided with a secondary fuel burner, and the injection angle of the secondary fuel is horizontally declined by 40-50 degrees.
The invention has the beneficial effects that: compared with the prior art, the technical scheme of the invention further reduces the content of NOx by changing the arrangement mode of the burner and the air distribution by utilizing the staged combustion principle, meets the requirement of ultra-clean emission, and overcomes the defect of high carbon content of fly ash caused by unmatched air distribution during staged air supply combustion. The overfire air is arranged at the outlet of the hearth, and the pulverized coal is combusted in a grading manner by grading air supply, so that the content of NOx in the flue gas is reduced. The other staged combustion mode is a fuel reburning technology, fuel is fed into a hearth in stages, fuel is sprayed above a main flame of a combustor, and then over-fire air is arranged at the upper part of a reburning area, so that the unburned carbon is combusted for three times, and the purposes of reducing the content of NOx and ensuring the full combustion of coal powder are achieved. Dead gas and reburning fuel are fed into the hearth at the position of the slope water-cooled wall after the arch is changed, so that the volume of a reburning area is increased, and NOx formed in the main burning area can be fully reduced in the reburning area. When no reburning fuel is added and the exhaust gas enters the hearth independently, a primary burnout zone can be formed at the upper part of the main combustion zone, and a secondary burnout zone is formed at the graded air position of the upper hearth, so that the full combustion of the coal powder is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
Fig. 2 is a side view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example (b): as shown in attached figures 1-2, a stepped double-stage arch W-shaped flame boiler device comprises a front wall water-cooled wall and a rear wall water-cooled wall which are symmetrically arranged front and back, wherein the front wall water-cooled wall and the rear wall water-cooled wall are respectively an upper hearth 11, a stepped double-stage arch 1, a lower hearth 15 and an ash bucket section 16 from top to bottom, a secondary over-fire air nozzle 10 is arranged on the upper hearth 11, and a primary over-fire air nozzle 9, a multipurpose secondary fuel nozzle 5, a main burner nozzle 2, an arch inner secondary air nozzle 3 and an arch outer secondary air nozzle 4 are respectively arranged on the stepped double-stage arch 1 from high to low. The combustor area is changed from a single-arch arrangement of a conventional W-shaped flame combustion boiler into a double-arch arrangement, secondary fuel is arranged on a second-stage step arch and is injected obliquely downwards, so that a relatively independent and wide secondary combustion area is constructed, and NOx generated in a main combustion area is further reduced into N2 by the injected secondary fuel under the condition that the excess air coefficient alpha is less than 1. Compared with the traditional single-arch arrangement (the secondary fuel can only be arranged in the upper hearth), the relatively independent and wide secondary combustion area and the secondary fuel nozzle which is obliquely downwards injected strengthen the mixing of the secondary fuel and the flue gas and increase the staying time and the reaction time of the secondary fuel and the high-temperature flue gas in the high-temperature oxygen-deficient secondary combustion area, thereby strengthening the reduction reaction of NOx, reducing the emission of NOx, and simultaneously, the strong mixing and the sufficient staying time are more beneficial to the burnout of the fuel. In addition, the relatively independent secondary combustion zone can reduce the influence and interference of the secondary fuel on the main combustion zone.
Further, the lower hearth 15 is vertically arranged, the secondary air nozzles 6 under the arch are arranged at the position, close to the ash bucket section 16, of the lower hearth 15, the horizontal secondary air nozzles 7 under the arch are arranged between the secondary air nozzles 6 under the arch, and the ventilation air nozzles 8 under the arch are arranged above the secondary air nozzles 6 under the arch. And high wind speed penetrates into the interior of the W-shaped flame to strengthen later-stage mixing, so that multi-stage depth grading air distribution along the way is formed, and impact and lifting to the pulverized coal flame of the main burner are reduced as much as possible.
An arch-down ventilation air nozzle is arranged on an arch-down vertical wall above an arch-down secondary air nozzle under a rectangular arch with an adjustable downward inclination angle, and ventilation air is sent into a hearth for combustion at a larger downward inclination angle (about 45 degrees) under normal conditions. When the exhaust air is switched to the multi-purpose secondary fuel nozzle, hot secondary air can be introduced into the arch exhaust air nozzle to form arch secondary air with a fixed declination angle.
Further, the stepped double-stage arch 1 comprises a first-stage stepped arch 12, a water cooling wall 13 between the double arches and a second-stage stepped arch 14 are fixedly connected with each other, an included angle between the first-stage stepped arch 12 and a horizontal plane is 10-20 degrees of upward inclination, the water cooling wall 13 between the double arches is vertically arranged, an included angle between the second-stage stepped arch 14 and the horizontal plane is 10-20 degrees of upward inclination, a multipurpose secondary fuel nozzle 5 is arranged at the position, close to the section of the water cooling wall 13 between the double arches, of the first-stage stepped arch 12, a first-stage burnout air nozzle 9 is arranged at the position, close to the top of an upper hearth 11, of the first-stage stepped arch 12, a main burner nozzle 2 is arranged at the position, close to the section of the water cooling wall 13 between the double arches, an arch-up secondary air nozzle 4 is arranged at the position, close to the lower hearth 15.
The primary over-fire air is arranged at the throat part of the secondary step arch at a smaller downward inclination angle (about 25 degrees), and the horizontal over-fire air is arranged in the upper hearth, so that the coal powder over-fire is improved, and the requirement of NOx emission is met.
Further, the second-stage over-fire air of the second-stage over-fire air nozzle 10 is sprayed in a horizontal mode, and the included angle between the axis of the first-stage over-fire air nozzle 9 and the horizontal plane is declined by 10-25 degrees.
Further, the main burner nozzle 2 is a circular nozzle, and the main burner is vertically arranged on the main burner nozzle 2. The main burner is preferably a straight-flow burner with a circular nozzle which is vertically arranged downwards, the rigidity and the downward-flushing capability of primary air can be enhanced, the high-temperature flue gas backflow of a lower hearth can be enhanced, the retention time of pulverized coal in the lower hearth can be prolonged, and the stable combustion and the burnout of the pulverized coal of the main burner can be facilitated.
The secondary air in the arch (close to the nozzle of the main burner) and the secondary air outside the arch (close to the wall) are arranged outside the nozzle of the main burner (close to the front wall and the back wall), and the secondary air opening is preferably arranged vertically downwards by adopting a circular nozzle. This facilitates premature mixing of the primary and secondary air and enhances the downwash capability of the secondary air over the arch. In addition, the air quantity of secondary air on the arch, the down-flushing capacity and the mixing distance and time between the secondary air and the primary air pulverized coal flame can be changed by adjusting the secondary air door on the arch and the secondary air door on the arch.
A multipurpose secondary fuel burner is arranged on the second-stage step arch, and secondary fuel (ultrafine powder or gas fuel) is injected into the secondary combustion zone at a large downward inclination angle (about 45 degrees) to realize fuel staged combustion; when no separate secondary combustion is available or the secondary fuel is not used due to reasons, the arch exhaust gas can be switched to a multi-purpose secondary fuel combustor on the secondary step arch to be used as the secondary fuel; or hot secondary air is introduced into the multipurpose secondary fuel burner and is used as secondary step arch over-fire air.
Further, the secondary air nozzles 6 under the arch are of a rectangular structure and are provided with air doors with declination angle adjusting ranges of 0-55 degrees. So as to adjust the flame shape of the W-shaped pulverized coal.
Furthermore, a secondary fuel burner is arranged on the multipurpose secondary fuel nozzle 5, and the injection angle of the secondary fuel is horizontally declined by 40-50 degrees.
Under the normal condition that the secondary fuel is independent, the exhaust gas is fed from the exhaust gas nozzle under the arch; when no independent secondary fuel exists, if the NOx emission can meet the requirement, the secondary fuel combustor is used as the over-fire air as much as possible, otherwise, the exhaust gas can be switched to the secondary fuel for use; through the switching and adjustment of secondary fuel and ventilation air nozzles, secondary air above and below the arch and burnout air, the adjustment of the fuel and the secondary air in different areas in the height direction can be realized to a larger extent, the flame undershoot and later-stage mixing are enhanced on the basis of avoiding the early mixing of the primary air and the secondary air, the deep graded air distribution which is gradually developed along the way is realized, and the burnout of pulverized coal is improved as much as possible while the NOx emission requirement is met.
The present invention is not described in detail, but is known to those skilled in the art. Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. The utility model provides a notch cuttype doublestage encircles "W" type flame boiler plant, it includes front wall water-cooling wall and back wall water-cooling wall, its characterized in that of symmetrical arrangement around it: the front wall water-cooled wall and the rear wall water-cooled wall are respectively provided with an upper hearth (11), a stepped double-stage arch (1), a lower hearth (15) and an ash bucket section (16) from top to bottom, secondary over-fire air nozzles (10) are arranged on the upper hearth (11), primary over-fire air nozzles (9), multi-purpose secondary fuel nozzles (5), main burner nozzles (2), inner over-arch secondary air nozzles (3) and outer over-arch secondary air nozzles (4) are respectively arranged on the stepped double-stage arch (1) from high to low, the stepped double-stage arch (1) comprises a primary stepped arch (12), a double-arch water-cooled wall (13) and a secondary stepped arch (14) and are fixedly connected with each other, the included angle between the primary stepped arch (12) and the horizontal plane is 10-20 degrees of upward inclination, the double-arch water-cooled wall (13) is vertically arranged, the included angle between the secondary stepped arch (14) and the horizontal plane is 10-20 degrees of upward inclination, multipurpose secondary fuel spout (5) are arranged at one-level ladder arch (12) and are close to water cooling wall (13) section between two arches, one-level burn-out air spout (9) are arranged at one-level ladder arch (12) and are close to the top of last furnace (11), main burner spout (2) are arranged at second-level ladder arch (14) and are close to water cooling wall (13) section between two arches, arch-up outer secondary air spout (4) are arranged at second-level ladder arch (14) and are close to lower furnace (15), arch-up inner secondary air spout (3) are arranged between main burner spout (2) and arch-up outer secondary air spout (4).
2. A stepped two-stage arch "W" type flame boiler apparatus according to claim 1, wherein: the lower hearth (15) is vertically arranged, the part, close to the ash bucket section (16), of the lower hearth (15) is provided with the secondary air nozzles (6) under the arch, the horizontal secondary air nozzles (7) under the arch are arranged between the secondary air nozzles (6) under the arch, and the ventilation air nozzles (8) under the arch are arranged above the secondary air nozzles (6) under the arch.
3. A stepped two-stage arch "W" type flame boiler apparatus according to claim 1, wherein: the secondary overfire air of the secondary overfire air nozzle (10) is sprayed in a horizontal mode, and the included angle between the axis of the primary overfire air nozzle (9) and the horizontal plane is declined by 10-25 degrees.
4. A stepped two-stage arch "W" type flame boiler apparatus according to claim 1, wherein: the main burner nozzle (2) is a circular nozzle, and the main burner is vertically arranged on the main burner nozzle (2).
5. A stepped two-stage arch "W" type flame boiler apparatus according to claim 2, wherein: the secondary air nozzles (6) under the arch are of rectangular structures and are provided with air doors with declination angle adjusting ranges of 0-55 degrees.
6. A stepped two-stage arch "W" type flame boiler apparatus according to claim 1, wherein: the multipurpose secondary fuel nozzle (5) is provided with a secondary fuel burner, and the injection angle of the secondary fuel is horizontally declined by 40-50 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910985333.7A CN110542078A (en) | 2019-10-16 | 2019-10-16 | W-shaped flame boiler device with stepped two-stage arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910985333.7A CN110542078A (en) | 2019-10-16 | 2019-10-16 | W-shaped flame boiler device with stepped two-stage arch |
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| Publication Number | Publication Date |
|---|---|
| CN110542078A true CN110542078A (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910985333.7A Pending CN110542078A (en) | 2019-10-16 | 2019-10-16 | W-shaped flame boiler device with stepped two-stage arch |
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| Country | Link |
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| CN (1) | CN110542078A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628724A (en) * | 2020-12-23 | 2021-04-09 | 哈尔滨工业大学 | Industrial pulverized coal boiler with double horizontal hearths arranged in opposite flushing mode |
| CN113958948A (en) * | 2021-11-25 | 2022-01-21 | 哈尔滨工业大学 | W flame boiler suitable for wide coal combustion and combustion method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358730B (en) * | 2008-09-24 | 2010-06-02 | 哈尔滨工业大学 | W type flame boiler with over-fired air device arranged at junction of upper and lower of hearth |
| CN104406160A (en) * | 2014-11-19 | 2015-03-11 | 中国计量学院 | Low-NOx four-arch type W flame boiler for coupling air staging and fuel staging |
| CN106524137A (en) * | 2016-10-26 | 2017-03-22 | 哈尔滨工业大学 | Multi-injection staged W flame boiler using swirl pulverized coal burner |
| CN108758613A (en) * | 2018-05-23 | 2018-11-06 | 中机国能电力工程有限公司 | One kind four encircles W flame twin-stage bias combustion device |
| CN210662823U (en) * | 2019-10-16 | 2020-06-02 | 贵州电网有限责任公司 | W-shaped flame boiler structure with stepped two-stage arch |
-
2019
- 2019-10-16 CN CN201910985333.7A patent/CN110542078A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358730B (en) * | 2008-09-24 | 2010-06-02 | 哈尔滨工业大学 | W type flame boiler with over-fired air device arranged at junction of upper and lower of hearth |
| CN104406160A (en) * | 2014-11-19 | 2015-03-11 | 中国计量学院 | Low-NOx four-arch type W flame boiler for coupling air staging and fuel staging |
| CN106524137A (en) * | 2016-10-26 | 2017-03-22 | 哈尔滨工业大学 | Multi-injection staged W flame boiler using swirl pulverized coal burner |
| CN108758613A (en) * | 2018-05-23 | 2018-11-06 | 中机国能电力工程有限公司 | One kind four encircles W flame twin-stage bias combustion device |
| CN210662823U (en) * | 2019-10-16 | 2020-06-02 | 贵州电网有限责任公司 | W-shaped flame boiler structure with stepped two-stage arch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628724A (en) * | 2020-12-23 | 2021-04-09 | 哈尔滨工业大学 | Industrial pulverized coal boiler with double horizontal hearths arranged in opposite flushing mode |
| CN113958948A (en) * | 2021-11-25 | 2022-01-21 | 哈尔滨工业大学 | W flame boiler suitable for wide coal combustion and combustion method thereof |
| CN113958948B (en) * | 2021-11-25 | 2022-08-26 | 哈尔滨工业大学 | W flame boiler suitable for wide coal combustion and combustion method thereof |
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