CN101696798A - Compact circulating fluidized bed boiler with special division wall - Google Patents
Compact circulating fluidized bed boiler with special division wall Download PDFInfo
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- CN101696798A CN101696798A CN200910022573A CN200910022573A CN101696798A CN 101696798 A CN101696798 A CN 101696798A CN 200910022573 A CN200910022573 A CN 200910022573A CN 200910022573 A CN200910022573 A CN 200910022573A CN 101696798 A CN101696798 A CN 101696798A
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- tube sheet
- division wall
- heat exchange
- exchange tube
- heat exchanger
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Abstract
The invention relates to a compact circulating fluidized bed boiler with a special division wall. The special division wall divides a hearth into two hearths, the special division wall comprises at least one group of heat exchange tube plates, each heat exchange tube prevents the division wall from being deformed and has the function of separating ash particles; the ash particles separated from a separation tank of the heat exchange tube plates downwards flow into a heat exchanger between the two hearths and returns to the hearths or are discharged out of the boiler after being exchanged heat with a heat exchange surface in the heat exchanger. The invention has the characteristics of compact structure, convenient modular design and amplification, and is suitable for the circulating fluidized bed boiler required to arrange the division wall or heat exchanger.
Description
Technical field
The present invention relates to a kind of CFBB, particularly a kind of compact circulating fluidized bed boiler that has special division wall.
Background technology
CFBB is used widely in power industry owing to have technical characterstics such as fuel tolerance is wide, load regulation rate big, high-efficiency low-pollution.But increase along with the CFBB capacity, technical problem such as have that furnace inner space is limited, heating surface is arranged deficiency and stove inner screen type heating surface wear is serious, best solution is that the soft circulation circuit between separator and burner hearth is arranged external heat exchanger, a part of heat transferred external heat exchanger that circulating ash is loaded with, by regulating the ratio of recycle stock amount between material returning device and the external heat exchanger, can control the ignition temperature in the burner hearth, and steam parameter is regulated.
Traditional external heat exchanger need take certain height, be subjected to the restriction of separator, material returning device version, often make that separator bottom standpipe height is lower, be difficult for forming enough material envelopes, influenced the stable operation in separative efficiency and outer circulation loop, because the space is restricted, the general layout of external heat exchanger internal heating surface is too intensive in addition, problems such as easy appearance vibration in service, concentrated wear, booster, and be difficult to maintenance.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of compact circulating fluidized bed boiler that has special division wall is provided, adopt special division wall that boiler furnace is separated, utilize the heat exchange tube sheet of special division wall to finish the separation loopback of material, and heat exchanger is arranged between two burner hearths, have the characteristics of friction, no concentrated wear, no booster.
Technical scheme of the present invention is achieved in that
The compact circulating fluidized bed boiler that has special division wall, comprise by boiler furnace roof 11 and boiler side wall 12,13 burner hearths that surround, burner hearth is divided into burner hearth 2 by special division wall 1,3, the arranged beneath heat exchanger 5 between two burner hearths 2,3, special division wall 1 is connected with heat exchanger 5 by the separating tank of heat exchange tube sheet 4 on it, is furnished with heating surface 6 in heat exchanger 5.
Heat exchange tube sheet 4 comprises wing tube sheet 4A and web 4B, and each organizes heat exchange tube sheet 4 can be to be interrupted to arrange, arrange continuously or interlaced arrangement along special division wall 1 width.Heat exchange tube sheet 4 is welded by pipe and steel plate, wing tube sheet 4A is vertical with the depth direction D of described burner hearth, and the depth direction D of its web 4B and described burner hearth is arranged in parallel, the number of tubes that constitutes wing tube sheet 4A can be more than one or one, and the number of tubes that constitutes web 4B can be more than one or one.Fire and abrasion resistant material can be laid to reduce abrasion of particles in the surface of heat exchange tube sheet 4.
Heat exchange tube sheet 4 be furnished with upper linked box 8 and lower linked box 9, the pipe of heat exchange tube sheet 4 is communicated with upper linked box 8 and lower linked box 9.
The wing tube sheet 4A of heat exchange tube sheet 4 and web 4B can weld reinforcement separately to increase the rigidity and the intensity of special division wall 1.
The ash particle that is separated by the separating tank of heat exchange tube sheet 4 flows into downwards and is arranged in two heat exchangers 5 between the burner hearth 2,3, and the heating surface 6 of layout can cool off and sends it back to burner hearth or discharge out of the furnace material heat exchanger 5 in.
Compact circulating fluidized bed boiler provided by the invention constitutes integrated compact Layout with heat exchanger and boiler, solve regular circulation fluidized-bed combustion boiler heat exchanger and arranged limited problem, special division wall can form extended surface and resolution element in the stove under the situation that does not increase furnace height, can simplify grey closed circuit, can significantly reduce the boiler cost, be applicable to large circulating fluidized bed boiler.
Advantage of the present invention is:
One, the interior special division wall of stove has the effect of extended surface and resolution element simultaneously, is easy to maximize.
Two, burner hearth fin panel casing and heat exchanger are connected as a single entity, compact conformation, and it is little to take up room, and helps suspending in midair load-bearing and the design of expanding.
Three, by heat exchanger discharge cycle ash, can regulate in-furnace dust concentration, alleviate wearing and tearing in the stove.
Description of drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a cutaway view of the present invention.
Fig. 3 arranges schematic diagram for heat exchange tube sheet 4 along special division wall 1 width, and wherein, Fig. 3 (a) is the continuous layout drawing of heat exchange tube sheet; Fig. 3 (b) is the interruption layout drawing of heat exchange tube sheet; Fig. 3 (c) is the interlaced arrangement figure of heat exchange tube sheet.
Fig. 4 is different boiler furnace roofs layout schematic diagrames for special division wall 1 passes, and wherein, Fig. 4 (a) passes updip furnace roof layout drawing for special division wall; Fig. 4 (b) furnace roof layout drawing that has a down dip for special division wall passes; Fig. 4 (c) is horizontal furnace roof layout for special division wall passes.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
It is burner hearth 2,3 that CFBB shown in Figure 1 is divided into two parts by special division wall 1 with burner hearth, and boiler furnace roof 11 is the layout that tilts, the every side of boiler includes cyclone separator, be connected with boiler body by separator inlet 9,10, every side separator quantity can be 2 or more.
The ash particle that special division wall 1 is separated by heat exchange tube sheet 4 separating tanks flows into downwards and is arranged in two heat exchangers 5 between the burner hearth 2,3, and the heating surface of arranging in heat exchanger 56 can cool off material, and material is in fluidized state in heat exchanger 5.
The ash particle that heat exchange tube sheet 4 separating tanks separate is transmitted back in the stove under the fluidisation wind action after 6 coolings of heat exchanger 5 internal heating surfaces.
As shown in Figure 5, the ash particle that heat exchange tube sheet 4 separating tanks separate forms the grain flow that flows downward, flow into burner hearth 2, circulation in forming in 3, the end solid impurity particle that flows out from burner hearth 2,3 bottom levels enters the heat exchanger 5 that is connected as a single entity with burner hearth, heating surface 6 heat exchange in solid impurity particle and the heat exchanger and boiler is discharged in the back that is cooled, at this moment, heat exchanger 5 plays the effect of slag cooler, and heated fluidized wind flows in the stove by the perforate between heat exchanger 5 tops and the furnace wall cooling.
Among the figure: 1 is special division wall; 2,3 is burner hearth; 4 are the heat exchange tube sheet; 4A is wing tube sheet; 4B is web; 5 is heat exchanger; 6 are the heat exchanger face that is heated; 7 is the special division wall lower collecting box; 8 is header on the special division wall; 9,10 is separator inlet; 11 is boiler stove burner hearth; 12,13 is the boiler side wall.
Claims (9)
1. the compact circulating fluidized bed boiler that has special division wall, comprise by boiler furnace roof (11) and boiler side wall (12,13) burner hearth that surrounds, it is characterized in that burner hearth is divided into burner hearth (2,3) by special division wall (1), at two burner hearths (2,3) the arranged beneath heat exchanger (5) between, special division wall (1) is connected with heat exchanger (5) by the separating tank of heat exchange tube sheet (4) on it, is furnished with heating surface (6) in heat exchanger (5).
2. boiler according to claim 1, it is characterized in that, described special division wall (1) comprises at least one group of heat exchange tube sheet (4), heat exchange tube sheet (4) is made up of wing tube sheet (4A) and web (4B), and heat exchange tube sheet (4) can be to be interrupted to arrange, arrange continuously or interlaced arrangement along special division wall (1) width.
3. boiler according to claim 1, it is characterized in that heat exchanger (5) is arranged between two burner hearths (2,3), heat exchanger (5) can independently be arranged and can arrange also and formation overall compact structure that the layout quantity of heat exchanger (5) can be at least one with the burner hearth next-door neighbour.
4. boiler according to claim 1 is characterized in that, special division wall (1) is arranged along the vertical height direction in the centre of two burner hearths (2,3).
5. boiler according to claim 1 is characterized in that, boiler furnace roof (11) can be updip arrange, have a down dip arrange or horizontally disposed in a kind of, special division wall (1) passes boiler furnace roof (11).
6. boiler according to claim 2, it is characterized in that, heat exchange tube sheet (4) is welded by pipe and steel plate, wing tube sheet (4A) is vertical with the depth direction (D) of described burner hearth, and the depth direction (D) of its web (4B) and described burner hearth is arranged in parallel, the number of tubes that constitutes wing tube sheet (4A) can be more than one or one, and the number of tubes that constitutes web (4B) can be more than one or one.
7. boiler according to claim 2 is characterized in that, heat exchange tube sheet (4) be furnished with upper linked box (8) and lower linked box (9), the pipe of heat exchange tube sheet (4) is communicated with upper linked box (8) and lower linked box (9).
8. boiler according to claim 2 is characterized in that, Fire and abrasion resistant material can be laid in the surface of heat exchange tube sheet (4).
9. boiler according to claim 2 is characterized in that, the wing tube sheet (4A) of heat exchange tube sheet (4) and web (4B) can weld reinforcement separately to increase the rigidity and the intensity of special division wall (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910022573 CN101696798B (en) | 2009-05-18 | 2009-05-18 | Compact circulating fluidized bed boiler with special division wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910022573 CN101696798B (en) | 2009-05-18 | 2009-05-18 | Compact circulating fluidized bed boiler with special division wall |
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| Publication Number | Publication Date |
|---|---|
| CN101696798A true CN101696798A (en) | 2010-04-21 |
| CN101696798B CN101696798B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910022573 Active CN101696798B (en) | 2009-05-18 | 2009-05-18 | Compact circulating fluidized bed boiler with special division wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818894A (en) * | 2010-04-29 | 2010-09-01 | 清华大学 | Circulating fluidized bed boiler |
| CN103672875A (en) * | 2013-12-17 | 2014-03-26 | 东方电气集团东方锅炉股份有限公司 | External heat exchanger |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI97315C (en) * | 1990-09-26 | 1996-11-25 | Stein Industrie | Fluidized bed boiler furnace wall cooling equipment |
| JP3101631B2 (en) * | 1992-11-10 | 2000-10-23 | フォスター ホイーラー エナージア オサケ ユキチュア | Method and apparatus for operating a circulating fluidized bed reactor |
| EP0819900A1 (en) * | 1996-07-17 | 1998-01-21 | GEA Wärme- und Umwelttechnik GmbH | Installation for vapor-fed fluidised-bed drying of crude lignite |
| FR2837561B1 (en) * | 2002-03-25 | 2004-05-21 | Alstom Switzerland Ltd | FLUIDIZED BED BOILER FIREPLACE COMPRISING TWO FLOORS SEPARATED BY A CRACK |
| CN2767841Y (en) * | 2004-12-16 | 2006-03-29 | 西安热工研究院有限公司 | Partition structured circulating fluidized bed boiler |
| CN2807014Y (en) * | 2005-07-25 | 2006-08-16 | 姚祖春 | Vertical water-cooled vortex inner separation circulating fluidized bed boiler |
| CN200940824Y (en) * | 2006-08-18 | 2007-08-29 | 东方锅炉（集团）股份有限公司 | Circulation fluidized bed boiler hearth with back-to-back water cooling wall partition |
-
2009
- 2009-05-18 CN CN 200910022573 patent/CN101696798B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818894A (en) * | 2010-04-29 | 2010-09-01 | 清华大学 | Circulating fluidized bed boiler |
| CN101818894B (en) * | 2010-04-29 | 2011-10-26 | 清华大学 | Circulating fluidized bed boiler |
| CN103672875A (en) * | 2013-12-17 | 2014-03-26 | 东方电气集团东方锅炉股份有限公司 | External heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101696798B (en) | 2011-05-04 |
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