CN108224415B - Air distribution device - Google Patents
Air distribution device Download PDFInfo
- Publication number
- CN108224415B CN108224415B CN201810190516.5A CN201810190516A CN108224415B CN 108224415 B CN108224415 B CN 108224415B CN 201810190516 A CN201810190516 A CN 201810190516A CN 108224415 B CN108224415 B CN 108224415B
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- CN
- China
- Prior art keywords
- hood
- block
- directional
- abrasion
- composite
- 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.)
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- 238000009826 distribution Methods 0.000 title claims abstract description 41
- 238000005299 abrasion Methods 0.000 claims abstract description 42
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 239000011819 refractory material Substances 0.000 claims abstract description 13
- 239000011449 brick Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000002893 slag Substances 0.000 description 10
- 238000007599 discharging Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding 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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
An air distribution device comprises an air distribution plate and a plurality of composite hoods on the air distribution plate, and composite airThe cap comprises an inverted L-shaped directional hood and an anti-wear block. The directional hood comprises a vertical air inlet section and a horizontal air outlet section. The connection end of the anti-wear block and the directional hood is a clamping end, and the other end is a tail end. The clamping end of the anti-wear block is provided with a pipe sleeve as a positioning clamping sleeve and is connected with the anti-wear block into a whole. The pipe sleeve is sleeved on the outer side of the vertical air inlet section of the directional hood. Refractory materials are laid between the front and the rear adjacent composite hoods, and the lower edge of the transverse air outlet section of the rear composite hood is laid towards the tail end of the abrasion-proof block of the front composite hood. Minimum distance L between the end of the wear block and the outer wall of the directional hood B The width W of the anti-abrasion block is larger than or equal to the width W of the anti-abrasion block; the clamping end of the anti-wear block is in a symmetrical semicircular concave shape, and the width W of a tooth-shaped edge on one side of the concave shape B And the diameter is more than or equal to 10mm. The top clamping end of the anti-abrasion block is higher than the tail end, and the anti-abrasion block smoothly transits from the clamping end to the tail end. The middle lower part of the directional hood is provided with a positioning plate. The invention has the advantages of simple structure, wear resistance, ash deposition resistance and the like.
Description
Technical Field
The invention relates to an air distribution device, in particular to an air distribution device for fluidized combustion equipment, and belongs to the field of mechanical equipment.
Background
In fluidized combustion devices, such as fluidized bed boilers, the design of the air distribution device is particularly important. The hood is not only an important air distribution element, but also influences the fluidization quality of the bed material; meanwhile, the selection of the hood also affects the slag discharging condition of the hearth. Particularly, when inferior fuel is combusted, the 'eating in and out' is particularly important, and the stability of the operation of combustion equipment is related. In order to realize selective deslagging, a directional hood is often selected on an air distribution plate of the fluidized combustion equipment. However, when the existing directional hood realizes directional air distribution, the adjacent hood in front of the nozzle outlet is often worn due to large air quantity and high air pressure, and the service life of the hood is influenced. Chinese patent CN2551871 discloses a composite material hood, which is formed by adding an anti-wear layer of special anti-wear material on the surface of a 7-shaped air duct (heat-resistant metal tube), wherein the anti-wear material is fixed by welding metal pins and a heat-resistant metal net supported by the metal pins on the surface of the heat-resistant metal tube.
Disclosure of Invention
The invention provides an air distribution device, which adopts a composite directional hood, wherein an anti-abrasion block is arranged on the outer side of the directional hood, and refractory materials are laid between the front and rear adjacent composite hoods to prevent abrasion and ash accumulation.
The invention is realized by the following technical scheme:
the wind distribution device comprises a wind distribution plate arranged at the bottom of a hearth and a plurality of composite wind caps arranged on the wind distribution plate, wherein each composite wind cap comprises an inverted L-shaped (or gamma-shaped) directional wind cap and a wear-resistant block arranged on the directional wind cap in a clamping sleeve manner; the directional hood comprises a vertical air inlet section and a horizontal air outlet section arranged at the top end of the vertical air inlet section, and the joint of the vertical air inlet section and the horizontal air outlet section is in arc connection; the connection end of the anti-wear block and the directional hood is a clamping end, the other end is a tail end; the clamping end of the anti-abrasion block is arranged to be concave and sleeved on the outer side of the vertical air inlet section of the directional hood.
As a further improved technical scheme, the clamping end of the anti-wear block is provided with a sunken semicircular pipe sleeve, and the semicircular pipe sleeve is used as a positioning clamping sleeve of the anti-wear block and is connected with the anti-wear block into a whole.
As a further improved technical scheme, the pipe sleeve is sleeved on the outer side of the vertical air inlet section of the directional hood, and the diameter of the pipe sleeve is larger than that of the vertical air inlet section of the directional hood.
In the technical scheme, refractory materials are laid between the front and rear two adjacent composite hoods, and the refractory materials are laid from the lower edge of the transverse air outlet section of the rear composite hood to the tail end of the wear-resistant block of the front composite hood.
In the technical scheme, the minimum distance L between the tail end of the anti-abrasion block and the outer wall of the directional hood clamped with the anti-abrasion block B A width W greater than or equal to the wear block; the clamping ends of the anti-abrasion block and the directional hood are in symmetrical semicircular concave shapes, and the minimum width W of the toothed edge at one side of the concave shape B ≥10mm。
In the above technical scheme, the center distance L of the directional hood of the front and rear adjacent two composite hoods N The minimum distance L between the end of the wear-resistant block which is more than or equal to 2 times and the outer wall of the directional hood which is clamped with the wear-resistant block B I.e. L N ≥2L B 。
In the technical scheme, the top of the clamping end of the anti-wear block is flush with the top of the directional hood, and the clamping end of the anti-wear block is higher than the tail end; the top of the anti-abrasion block is in arc smooth transition from the clamping end to the tail end.
In the above technical scheme, the middle lower part of the vertical air inlet section of the directional hood is provided with a locating plate for locating the bottom of the anti-abrasion block.
In the technical scheme, the anti-abrasion block material is a special-shaped brick, and is preferably corundum special-shaped brick.
The beneficial effects of the invention are as follows: the prefabricated special-shaped brick anti-wear block is simple to install and good in anti-wear effect; the refractory material between the two adjacent front and rear hoods prevents ash deposition.
Drawings
Fig. 1 is a schematic top view of an air distribution device according to one embodiment of the present invention.
Fig. 2 is a schematic partial cross-sectional view of an air distribution device according to the present invention.
Fig. 3 is a detailed layout schematic diagram of a composite hood of an air distribution device according to the present invention.
Fig. 4 is a schematic top view of a composite hood of an air distribution device according to the present invention.
In the figure: 1-a hearth; 2-a composite hood; 21-directional hood; 22-pipe sleeve; 23-an anti-abrasion block; 24-positioning plates; 3-air distribution plates; 4-refractory material; 5-row a slag hole; and 6, an accident slag discharging port.
Detailed Description
The specific structure, operation and implementation of the present invention are discussed in detail below with reference to the accompanying drawings and examples.
The terms of upper, lower, left, right, front, rear, and the like in the present application are established based on the positional relationship shown in the drawings. The drawings are different, and the corresponding positional relationship may be changed, so that the scope of protection cannot be understood.
The invention relates to an air distribution device which comprises an air distribution plate 3 arranged at the bottom of a hearth 1 and a plurality of composite hoods 2 arranged on the air distribution plate 3. The plurality of composite hoods 2 are orderly arranged, and the whole air outlet direction faces the slag discharge port 5. In one embodiment shown in fig. 1 and 2, the air distribution plate 3 is obliquely arranged, and the slag discharging opening 5 is arranged at the lowest side of the air distribution plate 3 and is a slag discharging opening on a bed. The center of the air distribution plate 3 is also provided with an accident slag discharging port 6 for stopping the furnace and discharging slag in an emergency state. The composite wind caps 2 are arranged on the wind distribution plate 3, the composite wind caps 2 near the central position of the wind distribution plate are arranged in a bypassing state avoiding the accident slag discharge port 6, the rest composite wind caps 2 are arranged in a converging oblique line shape, and the air outlet of the latter composite wind cap faces the former composite wind cap.
As shown in the figure 3 of the drawings, the composite hood 2 comprises an inverted L-shaped (or gamma-shaped) directional hood 21 and an anti-abrasion block 23 which is arranged on the directional hood 21 in a clamping sleeve mode. The directional hood 21 comprises a vertical air inlet section and a horizontal air outlet section arranged at the top end of the vertical air inlet section, and the joint of the vertical air inlet section and the horizontal air outlet section is in arc transition connection. The connection end of the anti-abrasion block 23 and the directional hood 21 is a clamping end, and the other end is a tail end. The clamping end of the anti-wear block 23 is provided with a semicircular pipe sleeve 22, and the pipe sleeve 22 and the anti-wear block 23 are connected into a whole as a positioning cutting sleeve of the anti-wear block 23, so that the anti-wear block 23 becomes a modularized component in a specific air distribution device. In the implementation process, since the directional hood 21 of one wind distribution device is usually a prefabricated product, the pipe sleeve 22 and the anti-abrasion block 23 can also be integrally prefabricated, and the diameter of the pipe sleeve 22 is larger than that of the vertical wind inlet section of the directional hood 21. During installation, the pipe sleeve 22 is sleeved on the outer side of the vertical air inlet section of the directional hood 21, so that the anti-abrasion block 23 is also directly clamped on the outer side of the directional hood 21. The wear-resistant block 23 is made of special-shaped bricks, preferably corundum special-shaped bricks.
As shown in fig. 2 and 3, the top of the detent end of the wear block 23 is flush with the top of the directional cap 21. The clamping end of the anti-abrasion block 23 is higher than the tail end of the anti-abrasion block, and the top of the anti-abrasion block 23 is in arc smooth transition from the clamping end to the tail end. Typically, the height of the clamping end of the anti-wear block 23 is the height h of the end of the anti-wear block 23 B And the outer diameter of the transverse air outlet section of the directional hood 21.
The height of the wear block 23 is fixed and less than the height of the directional hood 21. Therefore, as shown in fig. 3, a locating plate 24 is arranged at the middle lower part of the vertical air inlet section of the directional hood 21 for locating the bottom of the anti-abrasion block 23. The distance between the locating plate 24 and the highest point of the directional hood 21 is the height of the clamping end of the anti-abrasion block 23.
As shown in fig. 4, the clamping ends of the anti-wear block 23 and the directional hood 21 are in symmetrical semi-circular concave shapes, the center of the concave shape is a vertical air inlet section of the sleeve 22 and the directional hood 21 clamped in the sleeve 22, and the minimum width W of the tooth-shaped edge on one side of the concave shape B The width W of the anti-abrasion block 23 is equal to the outer diameter D of the vertical air inlet section of the directional hood 21 and 2 times of the tooth-shaped edge width W B The sum of W=D+2W B . Minimum distance L between the end of the anti-wear block 23 and the outer wall of the directional hood 21 which is clamped with the anti-wear block B Greater than equal to anti-wear block 23 width W. At the same time, the center distance L of the directional hood 21 of the front and rear adjacent two composite hoods N The minimum distance L between the tail end of the anti-abrasion block 23 and the outer wall of the directional hood 21 clamped with the anti-abrasion block 23 is more than or equal to 2 times B I.e. L N ≥2L B 。
In addition, as shown in fig. 2, in order to avoid blockage caused by deposition of sundries and ash slag below the composite hood 2, refractory materials 4 are laid between the front and rear adjacent composite hoods 2, and the refractory materials 4 are laid from the lower edge of the horizontal air outlet section (below the outer wall of the horizontal section) of the horizontal air outlet section of the rear composite hood to the tail end of an anti-abrasion block 23 of the front composite hood. The connection between the refractory material 4 and the end of the anti-wear block 23 is smooth, i.e. the height of the end of the anti-wear block 23 is slightly higher than the plane height of the refractory material 4, and the refractory material 4 forms a slight upward smooth transition connection at the connection. In this way, the air outlet of the latter composite hood is also guided, and the abrasion-proof block 23 is prevented from being directly and linearly washed.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An air distribution device, the device includes air distribution plate (3) that can set up in furnace (1) and arranges a plurality of compound hood (2) on air distribution plate (3), its characterized in that: the composite hood (2) comprises an inverted L-shaped directional hood (21) and an anti-abrasion block (23) which is arranged on the directional hood (21) in a clamping sleeve mode; the directional hood (21) comprises a vertical air inlet section and a horizontal air outlet section arranged at the top end of the vertical air inlet section; the connecting end of the anti-abrasion block (23) and the directional hood (21) is a clamping end, and the other end is a tail end; the top of the clamping end of the anti-wear block (23) is flush with the top of the directional hood (21), and said anti-wear block (23) the clamping end is higher than the tail end; the clamping end of the anti-abrasion block (23) is arranged in a concave shape and sleeved on the outer side of the vertical air inlet section of the directional hood (21).
2. An air distribution device according to claim 1, characterized in that: the clamping end of the anti-abrasion block (23) is provided with a sunken semicircular pipe sleeve (22) which is used as a positioning clamping sleeve of the anti-abrasion block (23) and is fixedly connected with the anti-abrasion block (23) into a whole.
3. An air distribution device according to claim 2, characterized in that: the pipe sleeve (22) of the anti-abrasion block (23) is sleeved on the outer side of the vertical air inlet section of the directional hood (21), and the diameter of the pipe sleeve is larger than that of the vertical air inlet section of the directional hood (21).
4. An air distribution device according to claim 1, characterized in that: refractory materials (4) are laid between the front and rear adjacent composite hoods (2), and the refractory materials (4) are laid from the lower edge of the transverse air outlet section of the rear composite hood to the tail end of an anti-abrasion block (23) of the front composite hood.
5. An air distribution device according to claim 1, characterized in that: the minimum distance L between the tail end of the anti-abrasion block (23) and the outer wall of the clamping directional hood (21) B The width W of the anti-abrasion block (23) is larger than or equal to the width W; the wear-proof block is23 A semicircular concave shape symmetrical to the clamping end of the directional hood (21), and the minimum width W of the tooth-shaped edge on one side of the concave shape B ≥10mm。
6. A wind distribution device according to claim 3, wherein: the center distance L of the directional hood (21) of the front and rear adjacent two composite hoods N The minimum distance L between the end of the anti-abrasion block (23) which is more than or equal to 2 times and the outer wall of the directional hood (21) which is clamped with the anti-abrasion block B I.e. L N ≥2L B 。
7. An air distribution device according to claim 2, characterized in that: the top of the anti-abrasion block (23) is in arc smooth transition from the clamping end to the tail end.
8. An air distribution device according to claim 1, characterized in that: the middle lower part of the vertical air inlet section of the directional hood (21) is provided with a positioning plate (24) for positioning the bottom of the anti-abrasion block (23).
9. A wind distribution device according to any one of claims 1 to 6, wherein: the anti-abrasion block (23) is made of special-shaped bricks.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711208565 | 2017-11-27 | ||
| CN2017112085659 | 2017-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108224415A CN108224415A (en) | 2018-06-29 |
| CN108224415B true CN108224415B (en) | 2024-02-02 |
Family
ID=62667217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810190516.5A Active CN108224415B (en) | 2017-11-27 | 2018-03-08 | Air distribution device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108224415B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2549332Y (en) * | 2002-06-26 | 2003-05-07 | 宜宾丝丽雅股份有限公司 | Boiler tuyere with protective cover |
| CN2551871Y (en) * | 2002-04-12 | 2003-05-21 | 陆军 | Composite material hood for circulation fluidized bed boiler |
| CN101614400A (en) * | 2009-07-31 | 2009-12-30 | 北京热华能源科技有限公司 | A kind of fluidized selective deslagging device |
| CN201944829U (en) * | 2011-01-17 | 2011-08-24 | 四川省金路树脂有限公司 | Wearing-preventing device for transition zone of fluidized bed boiler |
| CN202598499U (en) * | 2012-06-11 | 2012-12-12 | 山东恒涛节能环保有限公司 | Anti-abrasion columnar wind cap |
| CN203068498U (en) * | 2012-09-29 | 2013-07-17 | 陕西陕煤黄陵矿业有限公司 | Wearing sleeves of boiler hood |
| CN203431852U (en) * | 2013-08-07 | 2014-02-12 | 湖北兴瑞化工有限公司 | Pouring material protective device for furnace hearth slag-dropping tube of circulating fluidized bed boiler |
| CN207922210U (en) * | 2017-11-27 | 2018-09-28 | 北京一亚高科能源科技有限公司 | A kind of air-distribution device |
-
2018
- 2018-03-08 CN CN201810190516.5A patent/CN108224415B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2551871Y (en) * | 2002-04-12 | 2003-05-21 | 陆军 | Composite material hood for circulation fluidized bed boiler |
| CN2549332Y (en) * | 2002-06-26 | 2003-05-07 | 宜宾丝丽雅股份有限公司 | Boiler tuyere with protective cover |
| CN101614400A (en) * | 2009-07-31 | 2009-12-30 | 北京热华能源科技有限公司 | A kind of fluidized selective deslagging device |
| CN201944829U (en) * | 2011-01-17 | 2011-08-24 | 四川省金路树脂有限公司 | Wearing-preventing device for transition zone of fluidized bed boiler |
| CN202598499U (en) * | 2012-06-11 | 2012-12-12 | 山东恒涛节能环保有限公司 | Anti-abrasion columnar wind cap |
| CN203068498U (en) * | 2012-09-29 | 2013-07-17 | 陕西陕煤黄陵矿业有限公司 | Wearing sleeves of boiler hood |
| CN203431852U (en) * | 2013-08-07 | 2014-02-12 | 湖北兴瑞化工有限公司 | Pouring material protective device for furnace hearth slag-dropping tube of circulating fluidized bed boiler |
| CN207922210U (en) * | 2017-11-27 | 2018-09-28 | 北京一亚高科能源科技有限公司 | A kind of air-distribution device |
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| Publication number | Publication date |
|---|---|
| CN108224415A (en) | 2018-06-29 |
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Address after: Room A601, building a 79, Shuangqing Road, Haidian District, Beijing 100084 Applicant after: Beijing hengran Technology Co.,Ltd. Address before: Room A601, building a 79, Shuangqing Road, Haidian District, Beijing 100084 Applicant before: BEIJING ONE-A HI-TECH ENERGY TECHNOLOGY Co.,Ltd. |
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