CN103335305B - A kind of air-distribution device of CFBB - Google Patents
A kind of air-distribution device of CFBB Download PDFInfo
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- CN103335305B CN103335305B CN201310285828.1A CN201310285828A CN103335305B CN 103335305 B CN103335305 B CN 103335305B CN 201310285828 A CN201310285828 A CN 201310285828A CN 103335305 B CN103335305 B CN 103335305B
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Abstract
The invention discloses a kind of air-distribution device of 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, described front water wall tube panel comprises the rear lower portion tube panel of tube panel, inclination in the middle part of the front upper tube panel of bending, horizontal segment tube panel, rear; Rear water wall tube panel comprises the forward lower part tube panel of tube panel, inclination in the middle part of top, the rear tube panel of bending, horizontal segment tube panel, front; The interlaced setting of pipe of the horizontal segment tube panel of forward and backward wall panelized-tube-wall section is also coated with fire-resistant abrasion-proof layer, tube panel, forward lower part tube panel and the equal symmetric arrays of rear lower portion tube panel be laid with fire-resistant abrasion-proof layer in the middle part of tube panel and rear in the middle part of front, the end of forward and backward side bottom tube panel is all connected with lower header, and several air cap device is located on air distribution plate.The present invention can effectively reduce thermal deviation and the hydrodynamic force deviation of forward and backward wall water-cooled tube panel, for CFBB provides technology ensure to Large Copacity, high parameter development.
Description
Technical field
The present invention 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 the development trend to Large Copacity, 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 the combustibility of CFBB, security and economy.
Current China CFBB extensively adopts air-distribution device, 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 bent by front wall water-cooled tube panel 15 and forms, and because air distribution plate 19 water-cooled tube panel absorbs the partial heat of fuel combustion release in burner hearth, causes the thermic load of forward and backward wall water-cooled tube panel to there is certain deviation; Meanwhile, because the stroke difference of working medium in forward and backward wall water-cooled tube panel is comparatively large, this arrangement makes the forward and backward wall water-cooled tube panel resistance of ducting differ greatly, and causes the flow of forward and backward wall water-cooled tube panel to there is certain deviation.In sum, this air-distribution device easily causes forward and backward wall water-cooled tube panel to there is certain thermal deviation and hydrodynamic force deviation, and this will seriously govern the development trend of CFBB to Large Copacity, high parameter.
Summary of the invention
The object of the invention 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 technology ensure to Large Copacity, high parameter development.
For achieving the above object, the air-distribution device of CFBB of the present invention, 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 the rear lower portion tube panel of tube panel, inclination in the middle part of the front upper tube panel of bending, horizontal segment tube panel, rear, rear water wall tube panel comprises the forward lower part tube panel of tube panel, inclination in the middle part of top, the rear tube panel of bending, horizontal segment tube panel, front, the interlaced setting of pipe of the horizontal segment tube panel that front water wall tube panel is corresponding with both rear water wall tube panels on pipe, downside is coated with fire-resistant abrasion-proof layer, tube panel in the middle part of tube panel and rear in the middle part of front, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, tube panel in the middle part of tube panel and rear in the middle part of front, forward lower part tube panel and rear lower portion tube panel are all laid with fire-resistant abrasion-proof layer, forward lower part tube panel is all connected with lower header with the end of rear lower portion tube panel, several air cap device is located on the air distribution plate that formed by two horizontal segment tube panels.
The present invention forms water cooled wind chamber by tube panel, forward lower part tube panel, arranged on left and right sides wall and lower header in the middle part of tube panel, rear lower portion tube panel, front in the middle part of the horizontal segment tube panel of forward and backward wall panelized-tube-wall section, rear, the symmetry realizing air distribution plate and water cooled wind chamber is arranged, ensure that the forward and backward thermic load of wall water-cooled tube panel and the equal and opposite in direction of intraductal working medium flow, effectively reduce thermal deviation and the hydrodynamic force deviation of front-back wall water-cooled tube panel, for CFBB provides technology ensure to Large Copacity, high parameter development;
As a further improvement on the present invention, described front water wall tube panel also comprises front wall bottom, the front tube panel of tube panel and inclination in the middle part of the front wall of front, in the middle part of the front wall of front, tube panel is connected with its front upper tube panel, and the end of its front wall bottom, front tube panel is also connected with lower header; Rear water wall tube panel also comprises Hou Qiang bottom, the rear tube panel of tube panel, inclination in the middle part of wall behind rear, and behind rear, in the middle part of wall, tube panel shields with its rear upper tube and is connected, and the end of Hou Qiang bottom, its rear tube panel is also connected with lower header; In the middle part of the front front wall that front water wall tube panel is corresponding with both rear water wall tube panels, behind tube panel, rear, in the middle part of wall, the pipe of tube panel, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel is crisscross arranged mutually, in the middle part of the front wall of all fronts behind tube panel and rear in the middle part of wall tube panel, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel all with the perpendicular bisector symmetric arrays of horizontal segment tube panel; The pipe arranging density of tube panel, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel in the middle part of wall behind tube panel, rear can be improved in the middle part of the front wall of front, strengthens intensity and the water-cooled effect of air compartment;
As a further improvement on the present invention, in the middle part of all fronts, in the middle part of tube panel, rear, the adjacent pipe of tube panel, forward lower part tube panel and rear lower portion tube panel is all weldingly connected by band steel; The intensity of tube panel can be strengthened, and be convenient to fire-resistant abrasion-proof layer and lay;
As a further improvement on the present invention, the pipe that described front water wall tube panel is adjacent with the horizontal segment tube panel both rear water wall tube panel is all weldingly connected by band steel, and several air cap device all connects firmly to be located on band steel; Both add the intensity of air distribution plate, be convenient to again fixing air cap device;
In sum, the present invention, 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 technology ensure to Large Copacity, 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 embodiment of the present invention.
Fig. 3 is the enlarged drawing at A place in Fig. 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
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 the rear lower portion tube panel of tube panel, inclination in the middle part of front wall bottom, the front tube panel of tube panel, inclination in the middle part of the front upper tube panel 1a of bending, horizontal segment tube panel, front front wall, rear; Rear water wall tube panel 2 comprises Hou Qiang bottom, the rear tube panel of tube panel, inclination in the middle part of wall behind the forward lower part tube panel of tube panel, inclination in the middle part of top, the rear tube panel 2a of bending, horizontal segment tube panel, front, rear;
The interlaced setting of pipe 6 of the horizontal segment tube panel that front water wall tube panel 1 is corresponding with both rear water wall tube panels 2 and adjacent pipe 6 are all weldingly connected by band steel 7, and being coated with fire-resistant abrasion-proof layer 8 in the upper and lower side of pipe 6, several air cap device 4 all welds to connect firmly to be located on band steel 7;
Tube panel in the middle part of tube panel and rear in the middle part of all fronts, forward lower part tube panel and rear lower portion tube panel, tube panel in the middle part of wall behind tube panel and rear in the middle part of the front wall of front, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, tube panel in the middle part of the front that front water wall tube panel 1 is corresponding with both rear water wall tube panels 2, tube panel in the middle part of rear, the pipe of forward lower part tube panel and rear lower portion tube panel, tube panel in the middle part of wall behind tube panel and rear in the middle part of the front wall of front, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel are crisscross arranged mutually, adjacent pipe is all weldingly connected by band steel, and be laid with fire-resistant abrasion-proof layer, end, front wall bottom, the front tube panel of forward lower part tube panel and rear lower portion tube panel are all connected with lower header 5 with Hou Qiang bottom, rear tube panel, the structure that arranged on left and right sides wall 3 adopts conventional tube panel to add fire-resistant abrasion-proof layer or steel plate to add fire-resistant abrasion-proof layer,
Front water wall tube panel 1 of the present invention and rear water wall tube panel 2 are for being arranged symmetrically with, by the horizontal segment tube panel of the two, tube panel in the middle part of rear, rear lower portion tube panel, tube panel in the middle part of front, forward lower part tube panel, tube panel in the middle part of the front wall of front, front wall bottom, front tube panel, tube panel in the middle part of wall behind rear, Hou Qiang bottom, rear tube panel, left, right two side 3 and lower header 5 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 form 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 is made up of tube panel, forward lower part tube panel in the middle part of tube panel, front wall bottom, front tube panel, front in the middle part of front water wall tube panel 1 and the front front wall of both rear water wall tube panels 2, and after water cooled wind chamber, wall 12 is made up of tube panel, Hou Qiang bottom, rear tube panel in the middle part of wall behind tube panel, rear lower portion tube panel, rear in the middle part of front water wall tube panel 1 and the rear of both rear water wall tube panels 2,
During use, several primary air piping 13 stretches into water cooled wind chamber 9, passes into cooling water in front water wall tube panel 1 and rear water wall tube panel 2; Because the symmetry of air distribution plate 10 and water cooled wind chamber 9 is arranged, ensure that the forward and backward thermic load of wall water-cooled tube panel and the equal and opposite in direction of intraductal working medium flow, effectively reduce thermal deviation and the hydrodynamic force deviation of front-back wall water-cooled tube panel, for CFBB provides technology ensure to Large Copacity, high parameter development; The pipe 6 that described front water wall tube panel 1 is adjacent with the horizontal segment tube panel of both rear water wall tube panels 2 is all weldingly connected by band steel 7, has both added the intensity of air distribution plate 10, has been convenient to again fixing 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 the rear lower portion tube panel of tube panel, inclination in the middle part of the front upper tube panel of bending, horizontal segment tube panel, rear, rear water wall tube panel comprises the forward lower part tube panel of tube panel, inclination in the middle part of top, the rear tube panel of bending, horizontal segment tube panel, front, the interlaced setting of pipe of the horizontal segment tube panel that front water wall tube panel is corresponding with both rear water wall tube panels on pipe, downside is coated with fire-resistant abrasion-proof layer, tube panel in the middle part of tube panel and rear in the middle part of front, forward lower part tube panel and rear lower portion tube panel are all with the perpendicular bisector symmetric arrays of horizontal segment tube panel, tube panel in the middle part of tube panel and rear in the middle part of front, forward lower part tube panel and rear lower portion tube panel are all laid with fire-resistant abrasion-proof layer, forward lower part tube panel is all connected with lower header with the end of rear lower portion tube panel, several air cap device is located on the air distribution plate that 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 front wall bottom, the front tube panel of tube panel and inclination in the middle part of the front wall of front, in the middle part of the front wall of front, tube panel is connected with its front upper tube panel, and the end of its front wall bottom, front tube panel is also connected with lower header; Rear water wall tube panel also comprises Hou Qiang bottom, the rear tube panel of tube panel, inclination in the middle part of wall behind rear, and behind rear, in the middle part of wall, tube panel shields with its rear upper tube and is connected, and the end of Hou Qiang bottom, its rear tube panel is also connected with lower header; In the middle part of the front front wall that front water wall tube panel is corresponding with both rear water wall tube panels, behind tube panel, rear, in the middle part of wall, the pipe of tube panel, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel is crisscross arranged mutually, in the middle part of the front wall of all fronts behind tube panel and rear in the middle part of wall tube panel, front front wall bottom tube panel and Hou Qiang bottom, rear tube panel 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 tube panel, forward lower part tube panel and rear lower portion tube panel in the middle part of tube panel, rear in the middle part of all fronts 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 pipe that described front water wall tube panel is adjacent with the horizontal segment tube panel both rear water wall tube panel is all weldingly connected by band steel, several air cap device all connects firmly and is located on band steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285828.1A CN103335305B (en) | 2013-07-09 | 2013-07-09 | A kind of air-distribution device of CFBB |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285828.1A CN103335305B (en) | 2013-07-09 | 2013-07-09 | A kind of air-distribution device of CFBB |
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| CN103335305A CN103335305A (en) | 2013-10-02 |
| CN103335305B true CN103335305B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310285828.1A Active CN103335305B (en) | 2013-07-09 | 2013-07-09 | A kind of air-distribution device of CFBB |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687855A2 (en) * | 1994-06-13 | 1995-12-20 | Foster Wheeler Energy Corporation | Circulating fluidized bed reactor for low grade fuels |
| CN201539856U (en) * | 2009-06-09 | 2010-08-04 | 西安热工研究院有限公司 | Central air supply device for boiler furnace of circulating fluidized bed |
| CN201615478U (en) * | 2010-03-02 | 2010-10-27 | 上海锅炉厂有限公司 | Boiler air distributor |
| CN203431848U (en) * | 2013-07-09 | 2014-02-12 | 东方电气集团东方锅炉股份有限公司 | Air distribution device of circulating fluidized bed boiler |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2972631B2 (en) * | 1997-03-24 | 1999-11-08 | バブコック日立株式会社 | Fluidized bed boiler and heat exchange method thereof |
| CN201875696U (en) * | 2010-11-25 | 2011-06-22 | 郑州锅炉股份有限公司 | Wind chamber system for circulating fluidized bed boiler |
| CN202532461U (en) * | 2012-03-16 | 2012-11-14 | 华西能源工业股份有限公司 | Air distribution device for circulating fluidized bed boiler |
-
2013
- 2013-07-09 CN CN201310285828.1A patent/CN103335305B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687855A2 (en) * | 1994-06-13 | 1995-12-20 | Foster Wheeler Energy Corporation | Circulating fluidized bed reactor for low grade fuels |
| CN201539856U (en) * | 2009-06-09 | 2010-08-04 | 西安热工研究院有限公司 | Central air supply device for boiler furnace of circulating fluidized bed |
| CN201615478U (en) * | 2010-03-02 | 2010-10-27 | 上海锅炉厂有限公司 | Boiler air distributor |
| CN203431848U (en) * | 2013-07-09 | 2014-02-12 | 东方电气集团东方锅炉股份有限公司 | Air distribution device of circulating fluidized bed boiler |
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| CN103335305A (en) | 2013-10-02 |
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