CN2930848Y - Bell-type windshield for fluid-bed reactor - Google Patents
Bell-type windshield for fluid-bed reactor Download PDFInfo
- Publication number
- CN2930848Y CN2930848Y CN 200620020678 CN200620020678U CN2930848Y CN 2930848 Y CN2930848 Y CN 2930848Y CN 200620020678 CN200620020678 CN 200620020678 CN 200620020678 U CN200620020678 U CN 200620020678U CN 2930848 Y CN2930848 Y CN 2930848Y
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- blast cap
- air duct
- outer cover
- bell
- airduct
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Abstract
A bell jar type blast cap is used in circulating fluidized bed boiler, which relates to a design of the structure of a blast cap in wind arrangement device. The blast cap comprises a main air duct, a partial air duct and an external housing. The partial air duct is arranged on the main air duct in the interference fit way. The outer is connected with the main blast cap through the screws and covers the partial air duct. The partial air duct and the outer are respectively provided with open vents. The main blast cap is welded with an air distribution plate with a case structure and arranged inside the wear-resistant materials so as to prevent from being worn. The blast cap can make fluidized medium better mixed with solid particles so as to form a good fluidization state, which can efficiently prevent from being worn, solve the problem of materials leakage, and overcome the difficulty of slag discharge. The cap has the advantages of being easy to product, with unique screw structure, convenient to setup and repair, which provides a wide range for resistance design.
Description
Technical field
The invention belongs to the air-distribution device that uses in the CFBB, particularly a kind of structural design of air-distribution device Apoplexy cap.
Background technology:
Air-distribution device is one of critical component of CFBB, and its performance directly influences flowing in the fluidization quality of fluid bed and the fluid bed, reaction, mass transfer and heat transfer, and then influences whole stove internal procedure.Blast cap then is the critical piece of air-distribution device, its effect is that fluidizing agent is carried out second diffluence and guiding, make it enter fluid bed with enough speed, and produce the air cushion layer of strong disturbance on blast cap top, make the solid particle energy good mixing in fluidizing agent and the bed, to set up good fluidized state.Therefore, the design of the selection of blast cap form, critical size and layout thereof will directly influence the resistance of fluidization quality and air distribution plate.
Polytype blast cap has been arranged at present, as column blast cap, mushroom-shaped blast cap, tobacco pipe shape blast cap, pigtail blast cap etc.The resistance of column blast cap is less, and is easy to manufacture, but fluidization quality is not ideal enough.Mushroom-shaped blast cap fluidization quality is better, and manufacturing cost is lower, but designs improperly, can produce bigger wearing and tearing; In addition, the drag characteristic of this class blast cap is subjected to the aperture Influences on Wind Velocity relatively responsive, causes under the underload resistance on the low side, and the bed material leaks serious, and the long-time running rear jet stops up the cleaning difficulty, and when the bed storage was big, layered fluidized phenomenon was obvious.All there are the not smooth problem of row's bed material in column blast cap and mushroom-shaped blast cap, tobacco pipe shape blast cap has appearred for this reason, tobacco pipe shape blast cap is the wind cap that is similar to the tobacco pipe shape, has well solved the not smooth problem of row's bed material, and the horizontal mixing intensity of material in the bed is increased.For guaranteeing fluidization quality, adopt big area of injection orifice, resistance is less, bring bed material leakage problem down, and wearing and tearing does not solve thereupon.The result of use of pigtail blast cap is better, and bed material problem is not leaked in both not wearing and tearing again, after its subject matter is the operation some time, in the discharge pipe, occurs the problem that part is blocked by the bed material inevitably vertically upward, and cleaning is trouble very.
Summary of the invention
At the deficiencies in the prior art and defective, purpose of the present invention and task are to provide a kind of bell-jar blast cap for CFBB, these blast cap sophisticated technologies, the resistance scope of design is wide, and wear resistance is strong, maintenance is installed conveniently, under underload, keep higher blast cap resistance, can obviously improve fluidization quality, prevent that effectively the bed material from leaking down, overcome row's bed material and freely do not reach problems such as wearing and tearing.
Purpose of the present invention and task are achieved by the following technical solution:
A kind of bell-jar blast cap that is used for CFBB.This blast cap is made of jointly air main, branch airduct and blast cap outer cover.Airduct adopted the mode of interference fit to be fixed on the air main in described minute, adopted thread connection between outer cover and the air main, and will divide airduct to cover.Divide and to open air vent respectively on airduct and the outer cover and not at sustained height.Air main adopts sleeve structure and air distribution plate welding, and is installed in the wear-resistant material layer to prevent wearing and tearing.Adopt this blast cap can make fluidizing agent and solid particle better mixing, thereby form good fluidized state.This blast cap can effectively prevent wearing and tearing, overcomes material problem such as leakage and deslagging difficulty down, and makes simply, adopts unique helicitic texture, is convenient to installation and maintenance, has bigger resistance scope of design.
In order further to improve fluidization quality, be convenient to the layout of this blast cap on air distribution plate, divide perforate respectively on airduct and the outer cover, can realize the separate design of outer cover perforate flow velocity and blast cap resistance, can obtain rational blast cap resistance under lower blast cap muzzle velocity, this can effectively reduce the wearing and tearing of blast cap.
Covering in bell outer cover on the airduct can prevent effectively that bed material on the air distribution plate from returning and go here and there back in the cloth wind air compartment.
The present invention compared with prior art has following advantage and beneficial effect: because this blast cap has adopted the bell-jar outer cover, can prevent that material from returning string; Adopt thread connection and interference fit to connect, maintenance is changed convenient; Adopt outer cover and the perforate of interior pipe two places control pressure drop, can reasonably design lower outer cover flow velocity, light abrasion under the resistance.
Description of drawings
Fig. 1 is the structural representation of bell-jar blast cap provided by the invention.
Fig. 2 is distinguished and admirable to schematic diagram in the blast cap.
Specific implementation
Below in conjunction with description of drawings concrete structure of the present invention and preferred forms: the bell-jar blast cap that is used for CFBB provided by the invention mainly by air main 1, divide airduct 2 and bell outer cover 3 three parts to form.Air main connects by interference fit with dividing airduct; Adopt thread connection between air main 1 and the outer cover 3, and will divide airduct 2 to cover, the common air-out passage that forms between outer cover and the outer wall of inner tube.Open individual layer or double-deck wind spray orifice on the interior pipe, open the individual layer spout on the outer cover, wind snout quantity is generally 2～8, can do oriented arrangement, also can adopt the formula that liquidates to arrange.The wind snout direction adopts horizontally disposed.Blast cap adopts sleeve-shaped structure and air distribution plate welding, and airduct is arranged in the wearing layer, can effectively prevent wearing and tearing.The blast cap outer cover is high temperature resistant cast steel casting, and is easy to make.
Claims (4)
1. bell-jar blast cap that is used for fluidized-bed reactor, contain air main (1), divide airduct (2) and outer cover (3), it is characterized in that: described outer cover (3) lid is enclosed within air main (1) and divides the outside of airduct (2), forms the air-out passage between blast cap outer cover (3) and branch airduct (2) outer wall; Divide the top of airduct (2) and the bottom of outer cover (3) to have horizontal bore.
2. according to the described bell-jar blast cap of claim 1, it is characterized in that: adopt thread connection between blast cap outer cover (3) and the air main (1), outer cover (3) is made the hex nut type for bell and end.
3. according to claim 1 or 2 described bell-jar blast caps, it is characterized in that: divide between airduct (2) and the air main (1) and adopt interference fit.
4. according to the described bell-jar blast cap of claim 1, it is characterized in that: the horizontal bore position on described minute airduct (2) will be higher than the height of the horizontal bore position on the outer cover (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620020678 CN2930848Y (en) | 2006-04-26 | 2006-04-26 | Bell-type windshield for fluid-bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620020678 CN2930848Y (en) | 2006-04-26 | 2006-04-26 | Bell-type windshield for fluid-bed reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2930848Y true CN2930848Y (en) | 2007-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620020678 Expired - Fee Related CN2930848Y (en) | 2006-04-26 | 2006-04-26 | Bell-type windshield for fluid-bed reactor |
Country Status (1)
| Country | Link |
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| CN (1) | CN2930848Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557308C (en) * | 2007-12-21 | 2009-11-04 | 哈尔滨工业大学 | Wall-Central Composite is supplied with the fluidized bed combustor of secondary wind |
| CN101943402A (en) * | 2010-06-18 | 2011-01-12 | 中国神华能源股份有限公司 | Circulating fluidized bed boiler |
| CN101543753B (en) * | 2008-03-26 | 2011-06-15 | 中国科学院工程热物理研究所 | Embedded type cylindrical blast cap |
| CN102305399A (en) * | 2011-09-01 | 2012-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Conveniently-assembled cowl with self-tightening function |
| CN106488800A (en) * | 2014-07-16 | 2017-03-08 | 阿美科福斯特惠勒电力集团北美公司 | Grid nozzle assembly, the fluidized-bed reactor with grid nozzle assembly and the method using grid nozzle assembly |
| CN108793161A (en) * | 2018-06-26 | 2018-11-13 | 陕西科汇热工技术有限责任公司 | A kind of blast cap |
-
2006
- 2006-04-26 CN CN 200620020678 patent/CN2930848Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557308C (en) * | 2007-12-21 | 2009-11-04 | 哈尔滨工业大学 | Wall-Central Composite is supplied with the fluidized bed combustor of secondary wind |
| CN101543753B (en) * | 2008-03-26 | 2011-06-15 | 中国科学院工程热物理研究所 | Embedded type cylindrical blast cap |
| CN101943402A (en) * | 2010-06-18 | 2011-01-12 | 中国神华能源股份有限公司 | Circulating fluidized bed boiler |
| CN102305399A (en) * | 2011-09-01 | 2012-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Conveniently-assembled cowl with self-tightening function |
| CN106488800A (en) * | 2014-07-16 | 2017-03-08 | 阿美科福斯特惠勒电力集团北美公司 | Grid nozzle assembly, the fluidized-bed reactor with grid nozzle assembly and the method using grid nozzle assembly |
| CN106488800B (en) * | 2014-07-16 | 2018-09-21 | 住友重工福威能源有限公司 | Grid nozzle component, the fluidized-bed reactor with grid nozzle component and the method using grid nozzle component |
| CN108793161A (en) * | 2018-06-26 | 2018-11-13 | 陕西科汇热工技术有限责任公司 | A kind of blast cap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Honghe Power Generation Co., Ltd. of Yunnan Datang International Assignor: Harbin Boiler Company Limited Contract fulfillment period: 2009.5.8 to 2014.5.8 Contract record no.: 2009530000004 Denomination of utility model: Bell-type windshield for fluid-bed reactor Granted publication date: 20070808 License type: Exclusive license Record date: 20090622 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.8 TO 2014.5.8; CHANGE OF CONTRACT Name of requester: YUNNAN DATANG INTERNATIONAL HONGHE POWER GENERATIO Effective date: 20090622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20150426 |
|
| EXPY | Termination of patent right or utility model |