CN200965226Y - Cyclone separation device central tube for circulating fluidized bed boiler - Google Patents
Cyclone separation device central tube for circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN200965226Y CN200965226Y CN 200620034913 CN200620034913U CN200965226Y CN 200965226 Y CN200965226 Y CN 200965226Y CN 200620034913 CN200620034913 CN 200620034913 CN 200620034913 U CN200620034913 U CN 200620034913U CN 200965226 Y CN200965226 Y CN 200965226Y
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- China
- Prior art keywords
- central tube
- dividing plate
- central pot
- cylinder body
- flue
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Abstract
The utility model belongs to a circulating fluid bed boiler cyclone separating device central pot, comprising a cylinder body, a fixed support boss arranged on the upper part of the cylinder body, a strengthening rib arranged on the inner wall of the cylinder body, clapboard groups and secondary clapboards positioned at the two sides of each clapboard. Owing to two groups of clapboards added on the inner inferior wall of the cylinder body, the utility model changes air stream conditions of flue gases which enter the central pot, and makes thicker particles enable to be separated into a principal circulation loop, thereby increasing the grain diameter of the flying ash separated by the cyclone separating device from d50 about 38Mum to d50 about 29 Mum. The central pot is characterized in that the central pot has a simple structure, reliability, a separating function, and can enhance separating efficiency greatly by being used coordinately with the cyclone separating device, in the meantime, the central pot can reduce efficiently wearing of soot to the silo flue heating surface. The utility model overcomes the disadvantages of single function of the background technique central pot, worse separating efficiency when used coordinately with the cyclone separating device, higher output smoke concentration and is easy to aggravate the wearing of the flue heating surface.
Description
Technical field
The utility model belongs to boiler flue gas gas solid separation parts, the supporting central tube with cyclone separator of particularly a kind of and CFBB, this central tube is to discharge after sending separator through the flue gas after the cyclone separator separating treatment, entering tail vertical well gas flue.
Background technology
Cyclone separator is the vitals of CFBB, it is that cylindrical shape, bottom are that the cylindrical shell and the central tube of funneling cone barrel formed by top mainly, central tube be arranged in axis, cylindrical shell top, its top stretch out cylinder top by the fixed support sleeve be connected with the vertical shaft type flue, the bottom then inserts separator main body inner chamber burner hearth flue entrance below.The gas-solid mixed flue gas that burner hearth comes out tangentially enters cyclone separator through flue entrance, forms two concentric eddy current, and outer vortex is downward, internal vortex makes progress.Thicker particle under action of centrifugal force, leave outer vortex and along barrel fall as recycle stock return burner hearth, keep the combustion chamber fast fluidized regime, keep fuel and repeatedly circulating combustion and reaction of desulfurizing agent, in the hope of reaching desirable burning and desulfuration efficiency; Thinner particle then enters tail vertical well gas flue with internal vortex through central tube and discharges after dedusting.Thereby the height of separator separative efficiency will seriously have influence on the efficiency of combustion of boiler and the discharge capacity of desulfuration efficiency and flue dust.Promptly when efficiency separator is low, the recycle stock amount of major loop is reduced, make the load and the efficient of boiler reduce, increase unburnt loss, and when when the flue gas concentration of central tube output is higher, also will cause the aggravation of vertical well gas flue heating surface wear, booster will take place, influence the disadvantages such as safe operation of boiler.And traditional central tube is first-class diameter cylinder, because cylindrical shell is longer, generally all welds the T-shape steel class reinforcements of two annular settings to increase radial strength at cylinder inboard wall.Therefore this central tube exists and only has conveying function in the supplied flue gases process, raising to the separator separative efficiency does not have synergistic effect, the about 38 μ m of the particle size of fly ash d50 of cyclone separator outlet (percentage by weight under promptly sieve is gone up, sieved is the sieve diameter of 50% o'clock correspondence), the more high disadvantage of the flue gas concentration of output.
Summary of the invention
The purpose of this utility model is defective, a kind of CFBB of the improvement design cyclone separator central tube that exists at background technology, further flue gas is carried out gas solid separation to reach in supplied flue gases, part particle separation in the flue gas of soon being taken out of central tube is come out, thereby improve the efficient of whole cyclone separator, reduce the purposes such as wearing and tearing of flue dust the vertical well gas flue heating surface.
Solution of the present utility model is to set up one group of dividing plate that axially is provided with at central tube bottom flue gas upstream end, enters the stream condition of central tube flue gas with change, participates in the circulation of main circulation loop thereby thicker particle is separated.Therefore the utility model comprises: be provided with the fixed support sleeve on cylindrical shell top and be provided with the equal diameter cylindrical shell of reinforcement at cylinder inboard wall; Key is also to be arranged at intervals with in the cylinder inboard wall bottom upper and lower two groups of dividing plates, every group comprise direct-axis to, etc. 3～5 dividing plates being provided with of radian, each dividing plate is fastenedly connected by outer side edges and barrel and is integral.
For stability and the choked flow effect that strengthens each dividing plate, between the two sides of each dividing plate and barrel, respectively be provided with a pair of secondary dividing plate; Each secondary dividing plate is 20 °～40 ° with angle between the corresponding dividing plate.And the described upper and lower two groups of dividing plates that are provided with at interval in the cylinder inboard wall bottom are section gap setting or dislocation setting at interval.
The utility model is owing to bottom direct-axis in central cylinder is provided with two groups of dividing plates at interval to overlapping or dislocation, changed the stream condition of the flue gas that enters central tube greatly, made particle thicker relatively in the flue gas that is about to output from flue gas flows, separate, enter the fluidized-bed combustion boiler main circulation loop down in the effect of this air-flow and the stopping of dividing plate.The utility model is set up the about 29 μ m of particle size of fly ash d50 of cyclone separator outlet supporting with it behind the dividing plate in central tube, improved the separative efficiency of separator effectively.Thereby it is simple in structure, reliable to have a central tube, and have separation function, can significantly improve separative efficiency with the supporting use of cyclone separator, guarantee that CFBB reaches comparatively ideal burning and desulfuration efficiency and reduces the characteristics such as wearing and tearing of flue dust to the vertical well gas flue heating surface.
Description of drawings
Fig. 1, for the utility model structure and with vertical well gas flue annexation schematic diagram;
Fig. 2, be the A-A view.
Among the figure: 1, central tube cylindrical shell, 2, the fixed support sleeve, 3, vertical well gas flue, 4, ring stiffener, 5, dividing plate, 6, secondary dividing plate, 7, gas approach.
The specific embodiment
Embodiment 1: cylindrical shell 1, axial high 5000mm, external diameter φ 2930mm, the thick 12mm of barrel; Upper and lower ring stiffener 4 all adopts the T-shape steel respectively apart from cylindrical shell lower end 1910mm and 300mm, and its specification and background technology are together; Fixed support sleeve 2 is also identical with background technology.It is the dividing plate 5 of RA253MA that two groups of dividing plates of present embodiment adopt overlapping setting, 4 every group, each (high * wide * thick) 800 * 885 * 10mm, material, on the same group between the dividing plate at a distance of 90 °, axially spaced-apart 200mm between two groups of dividing plates; Each secondary dividing plate 6 (high * wide * thick) 240 * 350 * 10mm, material are identical with dividing plate 5, are 30 ° of two ends with dividing plate 5 and weld with dividing plate 5 and the inwall that reaches cylindrical shell 1 respectively.
Embodiment 2: 45 ° of settings of dislocation between the upper and lower two groups of dividing plates of present embodiment, two groups of dividing plate axially spaced-aparts still be 200mm, 90 ° at interval between the dividing plate on the same group; All the other are all identical with embodiment 1.
Claims (3)
1, a kind of CFBB cyclone separator central tube is included in that cylindrical shell top is provided with the fixed support sleeve and the equal diameter cylindrical shell that is provided with reinforcement at cylinder inboard wall; It is characterized in that also being arranged at intervals with two groups of dividing plates in the cylinder inboard wall bottom, every group comprise direct-axis to, etc. 3～5 dividing plates being provided with of radian, each dividing plate is fastenedly connected by outer side edges and barrel and is integral.
2, CFBB according to claim 1 cyclone separator central tube is characterized in that respectively being provided with a pair of secondary dividing plate between the two sides of each dividing plate and the barrel; Each secondary dividing plate is 20 °～40 ° with angle between the corresponding dividing plate.
3, CFBB according to claim 1 cyclone separator central tube is characterized in that described two groups of dividing plates are that the section gap is provided with or dislocation is provided with at interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034913 CN200965226Y (en) | 2006-07-14 | 2006-07-14 | Cyclone separation device central tube for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034913 CN200965226Y (en) | 2006-07-14 | 2006-07-14 | Cyclone separation device central tube for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965226Y true CN200965226Y (en) | 2007-10-24 |
Family
ID=38869244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034913 Expired - Lifetime CN200965226Y (en) | 2006-07-14 | 2006-07-14 | Cyclone separation device central tube for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200965226Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862708A (en) * | 2010-02-10 | 2010-10-20 | 哈尔滨哈锅锅炉工程技术有限公司 | Center tube fixing device of cyclone separator |
| CN108019742A (en) * | 2016-11-03 | 2018-05-11 | 中国电力工程顾问集团华北电力设计院有限公司 | CFB boiler tertiary air central tube |
-
2006
- 2006-07-14 CN CN 200620034913 patent/CN200965226Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862708A (en) * | 2010-02-10 | 2010-10-20 | 哈尔滨哈锅锅炉工程技术有限公司 | Center tube fixing device of cyclone separator |
| CN101862708B (en) * | 2010-02-10 | 2012-01-18 | 哈尔滨哈锅锅炉工程技术有限公司 | Center tube fixing device of cyclone separator |
| CN108019742A (en) * | 2016-11-03 | 2018-05-11 | 中国电力工程顾问集团华北电力设计院有限公司 | CFB boiler tertiary air central tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGFANG ELECTRIC GROUP DONGFANG BOILER GROUP CO., Free format text: FORMER NAME: DONGFANG BOILER (GROUP) CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 643000 Star Street Zigong city of Sichuan Province Huang Jue Ping No. 150 Patentee after: DEC Dongfang Boiler (Group) Co., Ltd. Address before: 643000 Zigong city of Sichuan Province Huang Jueping Wuxing Street Patentee before: Dongfang Boiler (Group) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071024 |
|
| EXPY | Termination of patent right or utility model |