CN203431848U - Air distribution device of circulating fluidized bed boiler - Google Patents
Air distribution device of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN203431848U CN203431848U CN201320405627.6U CN201320405627U CN203431848U CN 203431848 U CN203431848 U CN 203431848U CN 201320405627 U CN201320405627 U CN 201320405627U CN 203431848 U CN203431848 U CN 203431848U
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- tube panel
- pipe screen
- panel
- water wall
- wall
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- Withdrawn - After Issue
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Abstract
The utility model discloses an air distribution device of a circulating fluidized bed boiler. The air distribution device comprises a front wall water-cooled wall pipe screen, a rear wall water-cooled wall pipe screen, a left side wall, a right side wall, a plurality of air cap devices and a lower collection box, wherein the front wall water-cooled wall pipe screen comprises a bent front upper pipe screen, a horizontal section pipe screen, a rear middle pipe screen and an inclined rear lower pipe screen; the rear wall water-cooled wall pipe screen comprises a bent rear upper pipe screen, a horizontal section pipe screen, a front middle pipe screen and an inclined front lower pipe screen; pipes of the horizontal section pipe screens of the front wall water-cooled wall pipe screen and the rear wall water-cooled wall pipe screen are arranged in a mutually-staggered manner and are covered by fireproof and wear-resisting layers; the front middle pipe screen and the rear middle pipe screen, and the front lower pipe screen and the rear lower pipe screen are arrayed symmetrically and are paved with fireproof and wear-resisting layers; the tail ends of the front lower pipe screen and the rear lower pipe screen are connected with the lower collection box; the plurality of air cap devices are arranged on an air distribution plate. According to the air distribution device of the circulating fluidized bed boiler, heat deviation and water power deviation of the front wall water-cooled wall pipe screen and the rear wall water-cooled wall pipe screen can be reduced effectively and technical guarantees are provided for large-capacity and high-parameter development of the circulating fluidized bed boiler.
Description
Technical field
The utility model relates to a kind of air-distribution device of CFBB.
Background technology
Along with the develop rapidly of Technology of Circulating Fluidized Bed Boiler, CFBB presents to the development trend of large capacity, high parameter.Air-distribution device is as boiler vitals, and the Main Function in CFBB is: 1. supporting bed material; 2. make air be evenly distributed on the cross section of whole combustion chamber, and make bed material and the uniform fluidisation of material.The quality of air-distribution device structure affects combustibility, security and the economy of CFBB.
China's CFBB extensively adopts air-distribution device at present, its structure as shown in Figure 1, comprise front water wall tube panel 15, rear water wall tube panel 16, arranged on left and right sides wall 17, several air cap device 18, a part for front water wall tube panel 15 is bent to form air distribution plate 19, another part continues to form water cooled wind chamber 20 downwards together with arranged on left and right sides wall 17, finally all comes together in front lower header 21; Rear wall water-cooled tube panel 16 directly comes together in rear lower header 22.This air-distribution device is formed by 15 bendings of front wall water-cooled tube panel, because air distribution plate 19 water-cooled tube panels have absorbed the part heat that in burner hearth, fuel combustion discharges, causes the thermic load of forward and backward wall water-cooled tube panel to have certain deviation; Meanwhile, because the stroke of working medium in forward and backward wall water-cooled tube panel differs larger, this arrangement differs greatly the forward and backward wall water-cooled tube panel resistance of ducting, causes the flow of forward and backward wall water-cooled tube panel to have certain deviation.In sum, this air-distribution device easily causes forward and backward wall water-cooled tube panel to have certain thermal deviation and hydrodynamic force deviation, and this will seriously restrict the development trend of CFBB to large capacity, high parameter.
Summary of the invention
The purpose of this utility model is for prior art above shortcomings, a kind of air-distribution device of CFBB is provided, it can effectively reduce thermal deviation and the hydrodynamic force deviation of forward and backward wall water-cooled tube panel, for CFBB provides technical guarantee to large capacity, high parameter development.
For achieving the above object, the air-distribution device of CFBB of the present utility model, comprise front water wall tube panel, rear water wall tube panel, arranged on left and right sides wall, several air cap device, lower header, it is characterized in that described front water wall tube panel comprises top, the place ahead tube panel, horizontal segment tube panel, middle part, the rear tube panel of bending, the rear lower portion tube panel of inclination, rear water wall tube panel comprises top, rear tube panel, horizontal segment tube panel, middle part, the place ahead tube panel of bending, the forward lower part tube panel of inclination, the interlaced setting of pipe of the two corresponding horizontal segment tube panel of front water wall tube panel and rear water wall tube panel on pipe, downside is coated with fire-resistant abrasion-proof layer, the place ahead middle part tube panel and middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, the place ahead middle part tube panel and middle part, rear tube panel, on forward lower part tube panel and rear lower portion tube panel, be all laid with fire-resistant abrasion-proof layer, the end of forward lower part tube panel and rear lower portion tube panel is all connected with lower header, several air cap devices are located on the air distribution plate being formed by two horizontal segment tube panels.
The utility model forms water cooled wind chamber by horizontal segment tube panel, middle part, rear tube panel, rear lower portion tube panel, middle part, the place ahead tube panel, forward lower part tube panel, arranged on left and right sides wall and the lower header of forward and backward wall panelized-tube-wall section, realizing the symmetry of air distribution plate and water cooled wind chamber arranges, the thermic load of forward and backward wall water-cooled tube panel and the equal and opposite in direction of intraductal working medium flow have been guaranteed, thermal deviation and the hydrodynamic force deviation of front-back wall water-cooled tube panel have been effectively reduced, for CFBB provides technical guarantee to large capacity, high parameter development;
As further improvement of the utility model, described front water wall tube panel also comprises the forward lower part tube panel of the place ahead middle part tube panel and inclination, and middle part, the place ahead tube panel is connected with its top, the place ahead tube panel, and the end of its forward lower part tube panel is also connected with lower header; Rear water wall tube panel also comprises the rear lower portion tube panel of middle part, rear tube panel, inclination, and middle part, rear tube panel is connected with its rear upper tube screen, and the end of its rear lower tube screen is also connected with lower header; The pipe of middle part, the two corresponding the place ahead of front water wall tube panel and rear water wall tube panel tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel is crisscross arranged mutually, and in the middle part of middle part, all the place aheads tube panel and rear, tube panel, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel; Can improve the pipe arranging density of middle part, the place ahead tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel, strengthen intensity and the water-cooled effect of air compartment;
As further improvement of the utility model, the adjacent pipe of middle part, all the place aheads tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel is all weldingly connected by band steel; Can strengthen the intensity of tube panel, and be convenient to fire-resistant abrasion-proof layer and lay;
As further improvement of the utility model, the two the adjacent pipe of horizontal segment tube panel of described front water wall tube panel and rear water wall tube panel is all weldingly connected by band steel, and several air cap devices all connect firmly to be located on band steel; Both increase the intensity of air distribution plate, be convenient to again fixedly air cap device;
In sum, the utility model, by being symmetrical arranged forward and backward wall water-cooled tube panel, can effectively reduce thermal deviation and the hydrodynamic force deviation of forward and backward wall water-cooled tube panel, for CFBB provides technical guarantee to large capacity, high parameter development.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing air-distribution device.
Fig. 2 is the structural representation of the utility model embodiment.
Fig. 3 is the enlarged drawing at A place in Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 2 to Figure 3, the air-distribution device of this CFBB, comprise front water wall tube panel 1, rear water wall tube panel 2, arranged on left and right sides wall 3, several air cap device 4, lower header 5, described front water wall tube panel 1 comprises top, the place ahead tube panel 1a, horizontal segment tube panel, middle part, the place ahead tube panel of bending, the rear lower portion tube panel of the forward lower part tube panel of inclination, middle part, rear tube panel, inclination; Rear water wall tube panel 2 comprises top, rear tube panel 2a, horizontal segment tube panel, middle part, the place ahead tube panel of bending, the rear lower portion tube panel of the forward lower part tube panel of inclination, middle part, rear tube panel, inclination;
Front water wall tube panel 1 is all weldingly connected by band steel 7 with the interlaced setting of pipe 6 of rear water wall tube panel 2 the two corresponding horizontal segment tube panel and adjacent pipe 6, and being coated with fire-resistant abrasion-proof layer 8 in the upper and lower side of pipe 6, several air cap devices 4 all weld to connect firmly and are located on band steel 7;
In the middle part of middle part, all the place aheads tube panel and rear, tube panel, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, front water wall tube panel 1 is crisscross arranged mutually with the pipe of rear water wall tube panel 2 the two middle part, corresponding the place ahead tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel, adjacent pipe is all weldingly connected by band steel, and is laid with fire-resistant abrasion-proof layer; The end of all forward lower part tube panels and rear lower portion tube panel is all connected with lower header 5; Arranged on left and right sides wall 3 adopts conventional tube panel to add the structure that fire-resistant abrasion-proof layer or steel plate add fire-resistant abrasion-proof layer;
Front water wall tube panel 1 of the present utility model and rear water wall tube panel 2 are for being arranged symmetrically with, horizontal segment tube panel, middle part, rear tube panel, rear lower portion tube panel, middle part, the place ahead tube panel, forward lower part tube panel, arranged on left and right sides wall 3 and lower header 5 by the two form water cooled wind chamber 9, lower header 5 is positioned at the lower central of water cooled wind chamber, front water wall tube panel 1 and the horizontal segment tube panel of rear water wall tube panel 2 and the band steel 7 of connecting pipe 6 and fire-resistant abrasion-proof layer 8 formation air distribution plate 10, fire-resistant abrasion-proof layer 8 can adopt alumine or corundum to add the material of aluminium oxide; Water cooled wind chamber front wall 11 consists of the two middle part, the place ahead tube panel, forward lower part tube panel of front water wall tube panel 1 and rear water wall tube panel 2, and after water cooled wind chamber, wall 12 consists of the two middle part, rear tube panel, rear lower portion tube panel of front water wall tube panel 1 and rear water wall tube panel 2;
During use, several airducts 13 stretch into water cooled wind chamber 9, in front water wall tube panel 1 and rear water wall tube panel 2, pass into cooling water; Because the symmetry of air distribution plate 10 and water cooled wind chamber 9 is arranged, the thermic load of forward and backward wall water-cooled tube panel and the equal and opposite in direction of intraductal working medium flow have been guaranteed, thermal deviation and the hydrodynamic force deviation of front-back wall water-cooled tube panel have been effectively reduced, for CFBB provides technical guarantee to large capacity, high parameter development; The two the adjacent pipe 6 of horizontal segment tube panel of described front water wall tube panel 1 and rear water wall tube panel 2 is all weldingly connected by band steel 7, has both increased the intensity of air distribution plate 10, is convenient to again fixedly air cap device 4.
Claims (4)
1. the air-distribution device of a CFBB, comprise front water wall tube panel, rear water wall tube panel, arranged on left and right sides wall, several air cap device, lower header, it is characterized in that described front water wall tube panel comprises top, the place ahead tube panel, horizontal segment tube panel, middle part, the rear tube panel of bending, the rear lower portion tube panel of inclination, rear water wall tube panel comprises top, rear tube panel, horizontal segment tube panel, middle part, the place ahead tube panel of bending, the forward lower part tube panel of inclination, the interlaced setting of pipe of the two corresponding horizontal segment tube panel of front water wall tube panel and rear water wall tube panel on pipe, downside is coated with fire-resistant abrasion-proof layer, the place ahead middle part tube panel and middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, the place ahead middle part tube panel and middle part, rear tube panel, on forward lower part tube panel and rear lower portion tube panel, be all laid with fire-resistant abrasion-proof layer, the end of forward lower part tube panel and rear lower portion tube panel is all connected with lower header, several air cap devices are located on the air distribution plate being formed by two horizontal segment tube panels.
2. the air-distribution device of a kind of CFBB as claimed in claim 1, it is characterized in that described front water wall tube panel also comprises the forward lower part tube panel of the place ahead middle part tube panel and inclination, middle part, the place ahead tube panel is connected with its top, the place ahead tube panel, and the end of its forward lower part tube panel is also connected with lower header; Rear water wall tube panel also comprises the rear lower portion tube panel of middle part, rear tube panel, inclination, and middle part, rear tube panel is connected with its rear upper tube screen, and the end of its rear lower tube screen is also connected with lower header; The pipe of middle part, the two corresponding the place ahead of front water wall tube panel and rear water wall tube panel tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel is crisscross arranged mutually, and in the middle part of middle part, all the place aheads tube panel and rear, tube panel, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel.
3. the air-distribution device of a kind of CFBB as claimed in claim 2, is characterized in that the adjacent pipe of middle part, all the place aheads tube panel, middle part, rear tube panel, forward lower part tube panel and rear lower portion tube panel is all weldingly connected by band steel.
4. the air-distribution device of a kind of CFBB as described in as arbitrary in claims 1 to 3, it is characterized in that the two the adjacent pipe of horizontal segment tube panel of described front water wall tube panel and rear water wall tube panel is all weldingly connected by band steel, several air cap devices all connect firmly and are located on band steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405627.6U CN203431848U (en) | 2013-07-09 | 2013-07-09 | Air distribution device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405627.6U CN203431848U (en) | 2013-07-09 | 2013-07-09 | Air distribution device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203431848U true CN203431848U (en) | 2014-02-12 |
Family
ID=50060883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320405627.6U Withdrawn - After Issue CN203431848U (en) | 2013-07-09 | 2013-07-09 | Air distribution device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203431848U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335305A (en) * | 2013-07-09 | 2013-10-02 | 东方电气集团东方锅炉股份有限公司 | Air distribution device of circulating fluidized bed boiler |
-
2013
- 2013-07-09 CN CN201320405627.6U patent/CN203431848U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335305A (en) * | 2013-07-09 | 2013-10-02 | 东方电气集团东方锅炉股份有限公司 | Air distribution device of circulating fluidized bed boiler |
| CN103335305B (en) * | 2013-07-09 | 2016-03-30 | 东方电气集团东方锅炉股份有限公司 | A kind of air-distribution device of CFBB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140212 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |