CN113339788A - Pulverized coal burner nozzle device suitable for stable combustion of boiler - Google Patents
Pulverized coal burner nozzle device suitable for stable combustion of boiler Download PDFInfo
- Publication number
- CN113339788A CN113339788A CN202110648228.1A CN202110648228A CN113339788A CN 113339788 A CN113339788 A CN 113339788A CN 202110648228 A CN202110648228 A CN 202110648228A CN 113339788 A CN113339788 A CN 113339788A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- pulverized coal
- coal burner
- boiler
- stable combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A nozzle device of pulverized coal burner is suitable for stable combustion of boiler. And more particularly to pulverized coal burner nozzles. The invention aims to solve the problems that in the prior art, because the pulverized coal nozzle and the bluff body are integrally cast, only the nozzle of the whole pulverized coal burner can be replaced when the pulverized coal nozzle and the bluff body are replaced, the workload is large, economic waste is caused, the pulverized coal nozzle and the bluff body cannot make relative displacement, the adaptation range of the burner to coal is small, and the adaptation range of the burner to coal is influenced. The outer nozzle is of a quadrangular frustum pyramid structure; the inner nozzle is fixedly arranged in the outer nozzle with openings at two sides, the inner walls at two sides of the inner nozzle are respectively provided with a slideway, and the blunt body is arranged on the two slideways in a sliding way through positioning sliders arranged at two sides of the blunt body; the left side and the right side of the small port of the outer nozzle are respectively processed with embedded grooves along the length direction, the periphery of the outer side wall of the large port of the outer nozzle is provided with a connecting frame, and the connecting frame is fixedly connected with the pulverized coal burner. The field of pulverized coal burner nozzle devices.
Description
Technical Field
The invention relates to the field of pulverized coal burner nozzle devices, in particular to a pulverized coal burner nozzle device suitable for stable combustion of a boiler.
Background
Thermal power is required to undertake more peak shaving tasks. In this case, more and more thermal power generating units participate in peak shaving, and the capacity of the unit units participating in peak shaving is also increased.
When the nozzle of the pulverized coal burner works, when a primary air-powder mixture passes through the bluff body, a stable backflow area is generated, so that the ignition point is stable, pulverized coal and air are mixed more sufficiently and uniformly, early volatile matters in the air-powder mixture are separated out more quickly, the combustion and stable combustion performance of the primary air-powder mixture is guaranteed, the burnout degree of higher pulverized coal particles can be kept, the coal type adaptability of the burner is improved, and the emission of ultra-low nitrogen oxides is further realized.
The existing pulverized coal burner nozzle still has some problems, firstly, because the pulverized coal burner nozzle and the blunt body are not abraded synchronously in work, the blunt body is abraded quickly usually, and when the blunt body needs to be replaced, the pulverized coal nozzle can also work normally for a long time. And because the pulverized coal nozzle and the bluff body are integrally cast, the pulverized coal nozzle can only be replaced for the whole pulverized coal burner nozzle during replacement, the workload is large, and economic waste is caused. Secondly, because the pulverized coal nozzle and the bluff body are integrally cast or welded, the pulverized coal nozzle and the bluff body cannot make relative displacement, when the coal quality changes, the pulverized coal nozzle and the bluff body cannot move back and forth to adjust a backflow area, the adaptation range of the burner to the coal is small, and the adaptation range of the burner to the coal is influenced.
In summary, the nozzle and the bluff body in the pulverized coal burner nozzle in the prior art are not abraded synchronously, when the bluff body needs to be replaced, the pulverized coal nozzle and the bluff body are manufactured by integral casting, the whole pulverized coal burner nozzle can only be replaced during replacement, the workload is large, economic waste is caused, the pulverized coal nozzle and the bluff body cannot make relative displacement, when the coal quality changes, a backflow adjusting area cannot be adjusted by moving the pulverized coal nozzle and the bluff body back and forth, the burner has a small adaptation range to the coal type, and the adaptation range of the burner to the coal is influenced.
Disclosure of Invention
The invention aims to solve the problems that a nozzle and a bluff body in a pulverized coal burner nozzle in the prior art are not abraded synchronously, when the bluff body needs to be replaced, the pulverized coal nozzle and the bluff body are integrally cast, only the whole pulverized coal burner nozzle can be replaced during replacement, the workload is large, economic waste is caused, the pulverized coal nozzle and the bluff body cannot make relative displacement, when the coal quality changes, an adjusting backflow area cannot move back and forth between the pulverized coal nozzle and the bluff body, the burner has a small adaptation range to coal, and the adaptation range of the burner to fire coal is influenced, thereby providing the pulverized coal burner nozzle device suitable for stable combustion of a boiler.
The technical scheme of the invention is as follows:
a kind of burner spray nozzle device of pulverized coal burner suitable for stable combustion of the boiler, it includes the outer spray nozzle, the outer spray nozzle is a square frustum structure;
the device also comprises an inner nozzle, a bluff body, two positioning slide blocks, two baffles and a connecting frame;
the inner nozzle is fixedly arranged in the outer nozzle with openings at two sides, the inner walls at two sides of the inner nozzle are respectively provided with a slideway, and the blunt body is slidably arranged on the two slideways through positioning sliders arranged at two sides of the blunt body;
the embedded grooves are respectively processed on the left side and the right side of the small port of the outer nozzle along the length direction, the two baffles are respectively arranged on the embedded grooves in a sliding mode, the connecting frame is arranged on the periphery of the outer side wall of the large port of the outer nozzle, and the connecting frame is fixedly connected with the pulverized coal burner.
Compared with the prior art, the invention has the following effects:
1. the pulverized coal burner nozzle device suitable for stable combustion of the boiler, provided by the invention, has the advantages that the high-temperature wear-resistant pulverized coal burner nozzle can be disassembled, when the blunt body is worn and needs to be replaced, the nozzle of the pulverized coal burner does not need to be integrally replaced, only the blunt body is replaced, the replacement cost, the maintenance time and the cost are saved, the burner nozzle can be controlled to burn a backflow area, the combustion performance is optimized, the adaptation range of the burner to coal is improved, the high-efficiency and stable combustion performance of combustion is ensured, and the low-load stable combustion of the boiler is realized.
2. The pulverized coal burner nozzle device suitable for stable combustion of the boiler can realize stable operation of a unit under 30% of rated load.
3. According to the pulverized coal burner nozzle device suitable for stable combustion of the boiler, provided by the invention, various operation indexes of the boiler are not lower than the operation level before modification, the combustion efficiency and stable combustion performance of the burner are improved, the service life of the pulverized coal burner is prolonged, and the energy is saved.
4. The invention provides a pulverized coal burner nozzle device suitable for stable combustion of a boiler, which can prevent the burning loss, coking, high-temperature corrosion and the like of the pulverized coal burner when the boiler combusts coal with high volatile matters, high sulfur matters and low ash fusion points.
Drawings
FIG. 1 is a schematic view of an angle of the present invention;
FIG. 2 is a schematic view of an inner nozzle mounting bluff body according to the present invention;
FIG. 3 is a schematic view of another angle of the present invention;
FIG. 4 is a schematic view of an outer nozzle mounting baffle of the present invention.
FIG. 5 is a schematic view of an outer nozzle of the present invention machining an embedded groove;
FIG. 6 is a schematic view of a baffle of the present invention;
FIG. 7 is a schematic view of an inner nozzle of the present invention;
fig. 8 is a schematic view of the bluff body and positioning slider of the present invention.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 8, and the nozzle device of the pulverized coal burner suitable for stable combustion of a boiler of the present embodiment includes an outer nozzle 1, wherein the outer nozzle 1 has a quadrangular frustum pyramid structure;
the nozzle also comprises an inner nozzle 2, a bluff body 4, two positioning slide blocks 5, two baffle plates 7 and a connecting frame 9;
the inner nozzle 2 is fixedly arranged inside the outer nozzle 1 with openings at two sides, sliding ways 3 are processed on the inner walls at two sides of the inner nozzle 2, and the blunt body 4 is slidably arranged on the two sliding ways 3 through positioning sliding blocks 5 arranged at two sides of the blunt body 4;
the left side and the right side of the small port of the outer nozzle 1 are respectively provided with an embedded groove 1-1 along the length direction, the two baffles 7 are respectively arranged on the embedded grooves 1-1 in a sliding way, the periphery of the outer side wall of the large port of the outer nozzle 1 is provided with a connecting frame 9, and the connecting frame 9 is fixedly connected with the pulverized coal burner. The nozzle of the high-temperature wear-resistant pulverized coal burner can be detached, so that when the blunt body 4 is worn and needs to be replaced, the nozzle of the pulverized coal burner does not need to be integrally replaced, and only the blunt body 4 is replaced.
The second embodiment is as follows: referring to fig. 7, the chute 3 of the present embodiment includes a vertical groove 3-1 and a horizontal groove 3-2;
the transverse groove 3-2 is arranged on the inner side walls of the left side and the right side of the inner nozzle 2 along the length direction, the vertical groove 3-1 is communicated with the transverse groove 3-2, the vertical groove 3-1 is positioned on the outer side of the transverse groove 3-2, and the cross sectional areas of the vertical groove 3-1 and the transverse groove 3-2 are in a convex shape. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 3, and the present embodiment further includes a plurality of stoppers 8; two ends of the slideway 3 are respectively provided with a stop dog 8. This arrangement prevents the positioning slide 5 from falling off the slide 3. The other embodiments are the same as the first or second embodiment.
The fourth concrete implementation mode: referring to fig. 8, the positioning block 5 of the present embodiment includes two sliding plates 5-1 and two sliding blocks 5-2;
the two sliding plates 5-1 are arranged in parallel relatively, one ends of the two sliding blocks 5-2 are respectively inserted into one sliding plate 5-1, the blunt body 4 is fixedly connected between the two sliding blocks 5-2, the outer sides of the sliding blocks 5-2 are provided with first pin shaft holes 10, the sliding plates 5-1 are arranged on the vertical grooves 3-1 in a sliding mode, and the sliding blocks 5-2 are arranged on the transverse grooves 3-2 in a sliding mode. The arrangement is matched with the sliding of the sliding plate 5-1 and the sliding block 5-2 on the vertical groove 3-1 and the transverse groove 3-2. The others are the same as the first, second or third embodiments.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 2, and the embodiment further includes a plurality of pins 6;
a plurality of second pin shaft holes 11 penetrating through the outer wall of the inner nozzle 2 are processed on the slide way 3, and the sliding plate 5-1 and the slide way 3 are fixedly connected through a first pin shaft hole 10 and the second pin shaft holes 11 through a pin shaft 6. This arrangement fixes the position of the blunt body 4 in the inner nozzle 2. The others are the same as the first, second, third or fourth embodiments.
The sixth specific implementation mode: referring to fig. 6, the baffle 7 of the present embodiment includes a cover plate 7-1 and an insertion plate 7-2;
the cover plate 7-1 is fixedly connected with the embedded plate 7-2, the embedded plate 7-2 is slidably arranged on the embedded groove 1-1, and the cover plate 7-1 is fixed on the outer wall of the outer nozzle 1 through bolts. The other embodiments are the same as the first, second, third, fourth or fifth embodiments.
The seventh embodiment: the present embodiment is described with reference to fig. 2, and the present embodiment further includes a plurality of connecting plates 12;
the four inner side walls of the outer nozzle 1 and the four outer side walls of the inner nozzle 2 are fixedly connected through a plurality of connecting plates 12 respectively. This arrangement is provided to strengthen the connection between the outer nozzle 1 and the inner nozzle 2. The other embodiments are the same as the first, second, third, fourth, fifth or sixth embodiments.
The specific implementation mode is eight: the present embodiment is described with reference to fig. 2, and the number of the connection plates 12 of the present embodiment is 4, 8, or 12. This arrangement is provided to strengthen the connection between the outer nozzle 1 and the inner nozzle 2. The other embodiments are the same as the first, second, third, fourth, fifth, sixth or the same.
The working principle is as follows:
the invention provides a pulverized coal burner nozzle device suitable for stable combustion of a boiler, wherein a blunt body 4 is adjusted in position back and forth through a slideway 3 according to performance requirements, the blunt body 4 passes through a first pin shaft hole 10 and a second pin shaft hole 11 through a pin shaft 6 and is fixed on the slideway 3, when the blunt body 4 is worn and needs to be replaced, the worn blunt body 4 is taken down from the slideway 3 processed on an inner nozzle 2 only by screwing the pin shaft 6, a new blunt body 4 is installed on the slideway 3, and then the pin shaft 6 is reversely screwed to be fixed on the inner nozzle 2.
The present invention has been described in terms of the preferred embodiments, but it is not limited thereto, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention will still fall within the technical scope of the present invention.
Claims (8)
1. A pulverized coal burner nozzle device suitable for stable combustion of a boiler comprises an outer nozzle (1), wherein the outer nozzle (1) is of a quadrangular frustum pyramid structure;
the method is characterized in that: the novel nozzle also comprises an inner nozzle (2), a bluff body (4), two positioning slide blocks (5), two baffle plates (7) and a connecting frame (9);
the inner nozzle (2) is fixedly arranged inside the outer nozzle (1) with openings at two sides, the inner walls at two sides of the inner nozzle (2) are respectively provided with a slideway (3), and the blunt body (4) is slidably arranged on the two slideways (3) through positioning slide blocks (5) arranged at two sides of the blunt body (4);
the left side and the right side of the small port of the outer nozzle (1) are respectively provided with an embedded groove (1-1) along the length direction, the two baffles (7) are respectively arranged on the embedded grooves (1-1) in a sliding manner, the periphery of the outer side wall of the large port of the outer nozzle (1) is provided with a connecting frame (9), and the connecting frame (9) is fixedly connected with the pulverized coal burner.
2. A pulverized coal burner nozzle apparatus adapted for stable combustion in a boiler in accordance with claim 1, wherein: the slideway (3) comprises a vertical groove (3-1) and a transverse groove (3-2);
the horizontal groove (3-2) is arranged on the inner side walls of the left side and the right side of the inner nozzle (2) along the length direction, the vertical groove (3-1) is communicated with the horizontal groove (3-2), the vertical groove (3-1) is positioned on the outer side of the horizontal groove (3-2), and the cross sectional areas of the vertical groove (3-1) and the horizontal groove (3-2) are in a convex shape.
3. A pulverized coal burner nozzle device adapted for stable combustion in a boiler in accordance with claim 2, wherein: also comprises a plurality of blocks (8);
two ends of the slideway (3) are respectively provided with a stop block (8).
4. A pulverized coal burner nozzle apparatus adapted for stable combustion in a boiler in accordance with claim 1, wherein: the positioning slide block (5) comprises two slide plates (5-1) and two slide blocks (5-2);
the two sliding plates (5-1) are arranged in parallel relatively, one ends of the two sliding blocks (5-2) are respectively inserted into one sliding plate (5-1), a blunt body (4) is fixedly connected between the two sliding blocks (5-2), a first pin shaft hole (10) is machined in the outer side of each sliding block (5-2), the sliding plates (5-1) are arranged on the vertical grooves (3-1) in a sliding mode, and the sliding blocks (5-2) are arranged on the transverse grooves (3-2) in a sliding mode.
5. A pulverized coal burner nozzle device adapted for stable combustion in a boiler in accordance with claim 4, wherein: the device also comprises a plurality of pin shafts (6);
a plurality of second pin shaft holes (11) penetrating through the outer wall of the inner nozzle (2) are processed on the slide way (3), and the slide plate (5-1) and the slide way (3) are fixedly connected through the first pin shaft holes (10) and the second pin shaft holes (11) through pin shafts (6).
6. A pulverized coal burner nozzle apparatus adapted for stable combustion in a boiler in accordance with claim 1, wherein: the baffle (7) comprises a cover plate (7-1) and an embedded plate (7-2);
the cover plate (7-1) is fixedly connected with the embedded plate (7-2), the embedded plate (7-2) is arranged on the embedded groove (1-1) in a sliding mode, and the cover plate (7-1) is fixed on the outer wall of the outer nozzle (1) through bolts.
7. A pulverized coal burner nozzle apparatus adapted for stable combustion in a boiler as set forth in claim 6, wherein: also comprises a plurality of connecting plates (12);
the four inner side walls of the outer nozzle (1) are fixedly connected with the four outer side walls of the inner nozzle (2) through a plurality of connecting plates (12).
8. A pulverized coal burner nozzle apparatus adapted for stable combustion in a boiler as set forth in claim 7, wherein: the number of the connecting plates (12) is 4, 8 or 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648228.1A CN113339788A (en) | 2021-06-10 | 2021-06-10 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648228.1A CN113339788A (en) | 2021-06-10 | 2021-06-10 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113339788A true CN113339788A (en) | 2021-09-03 |
Family
ID=77476392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110648228.1A Withdrawn CN113339788A (en) | 2021-06-10 | 2021-06-10 | Pulverized coal burner nozzle device suitable for stable combustion of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113339788A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6439136B1 (en) * | 2001-07-03 | 2002-08-27 | Alstom (Switzerland) Ltd | Pulverized solid fuel nozzle tip with ceramic component |
| CN203286563U (en) * | 2013-05-30 | 2013-11-13 | 武汉天和技术股份有限公司 | Coal power burner nozzle capable of improving ignition and burning stabilization capacities |
| CN203980270U (en) * | 2014-07-01 | 2014-12-03 | 四川川锅锅炉有限责任公司 | The adjustable coal burner nozzle of a kind of bluff body |
| CN110878939A (en) * | 2019-12-13 | 2020-03-13 | 哈尔滨博深科技发展有限公司 | Detachable high-temperature wear-resistant pulverized coal burner nozzle |
| CN211146464U (en) * | 2019-11-02 | 2020-07-31 | 白音华金山发电有限公司 | Novel can dismantle high temperature resistant pulverized coal burner spout |
| CN211716549U (en) * | 2019-12-13 | 2020-10-20 | 哈尔滨博深科技发展有限公司 | Detachable high-temperature wear-resistant pulverized coal burner nozzle |
-
2021
- 2021-06-10 CN CN202110648228.1A patent/CN113339788A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6439136B1 (en) * | 2001-07-03 | 2002-08-27 | Alstom (Switzerland) Ltd | Pulverized solid fuel nozzle tip with ceramic component |
| CN203286563U (en) * | 2013-05-30 | 2013-11-13 | 武汉天和技术股份有限公司 | Coal power burner nozzle capable of improving ignition and burning stabilization capacities |
| CN203980270U (en) * | 2014-07-01 | 2014-12-03 | 四川川锅锅炉有限责任公司 | The adjustable coal burner nozzle of a kind of bluff body |
| CN211146464U (en) * | 2019-11-02 | 2020-07-31 | 白音华金山发电有限公司 | Novel can dismantle high temperature resistant pulverized coal burner spout |
| CN110878939A (en) * | 2019-12-13 | 2020-03-13 | 哈尔滨博深科技发展有限公司 | Detachable high-temperature wear-resistant pulverized coal burner nozzle |
| CN211716549U (en) * | 2019-12-13 | 2020-10-20 | 哈尔滨博深科技发展有限公司 | Detachable high-temperature wear-resistant pulverized coal burner nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102927563A (en) | Local oxygen-enriched combustion transformation system for conventional circulating fluidized bed boiler with external bed | |
| CN201496957U (en) | Cyclone pulverized coal burner | |
| CN2869593Y (en) | Staged-combustion cyclone coal-powder combustor | |
| CN101988698A (en) | Cyclone pulverized coal burner | |
| CN113339788A (en) | Pulverized coal burner nozzle device suitable for stable combustion of boiler | |
| CN105351919A (en) | Horizontal circulating fluidized bed boiler for burning coal-water slurry | |
| CN110645569B (en) | Combustion system and combustion method for improving flexibility of W-flame boiler coal types | |
| CN211146464U (en) | Novel can dismantle high temperature resistant pulverized coal burner spout | |
| CN202501456U (en) | Pulverized coal boiler dual-channel overfire air or secondary air combustor device | |
| CN201706506U (en) | Multi-fuel asphalt stirring equipment burner | |
| CN109737387B (en) | Device for preventing high-temperature corrosion of side wall water-cooled wall of opposed combustion boiler and working method | |
| CN211716549U (en) | Detachable high-temperature wear-resistant pulverized coal burner nozzle | |
| CN218096013U (en) | Powder making and combustion system of supercritical and ultra-supercritical boilers | |
| CN202884905U (en) | Local oxygen-enriched combustion transformation system for conventional circulating fluidized bed boiler with external bed | |
| CN103104911A (en) | Three-stage overfire air arrangement mode | |
| CN104807004A (en) | Rough and fine coal powder separating and combusting device in coal powder pipe | |
| CN210373404U (en) | Horizontal pulverized coal fired boiler | |
| CN110878939A (en) | Detachable high-temperature wear-resistant pulverized coal burner nozzle | |
| CN210373405U (en) | Vertical pulverized coal boiler | |
| CN201251188Y (en) | Fire grate mechanism of marine incinerator | |
| CN210951284U (en) | Combustion system for improving flexibility of coal types of W flame boiler | |
| CN208108122U (en) | A kind of refuse incineration grate furnace poker mechanism | |
| CN103411215A (en) | Multi-directional jet-type cyclone pulverized coal burner | |
| CN103742926B (en) | Incinerator fire grate group | |
| CN103134050B (en) | Multi-coal low-nitrogen pulverized coal combustion device with gap wind |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210903 |
|
| WW01 | Invention patent application withdrawn after publication |