CN202561732U - Air distribution plate and air cap in circulating fluidized bed boiler - Google Patents
Air distribution plate and air cap in circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN202561732U CN202561732U CN2012200975313U CN201220097531U CN202561732U CN 202561732 U CN202561732 U CN 202561732U CN 2012200975313 U CN2012200975313 U CN 2012200975313U CN 201220097531 U CN201220097531 U CN 201220097531U CN 202561732 U CN202561732 U CN 202561732U
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- distribution plate
- air cap
- air
- holes
- air distribution
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Abstract
Disclosed are an air distribution plate and an air cap in a circulating fluidized bed boiler, and the air cap comprises runoff notches and air cap holes. The air cap is arranged on the air distribution plate; the air cap utilizes a bell-jar type dome, the holes are arranged radially on the circumferences of the air cap, the air cap is provided with 3 to 8 holes, diameters of the holes are 7 millimeters, and the holes are distributed crosswise and evenly into three rows from top to bottom; the runoff notches and the air cap holes are arranged on the air distribution plate, the opening ratio of the air cap holes on the air distribution plate is 5%, and the pitches are 1.5 times of brim diameters of the air cap. According to the air distribution plate and the air cap in the circulating fluidized bed boiler, the abrasion resistance is good, the slag leakage phenomena cannot occur, the air cap holes are not easy to be blocked, and maintenance and cleaning are convenient; under the circumstance of unchanged particle size distribution of coal as fired of the air distribution plate, the larger the impact force of airflow on particles at the bottom of the bed is, the more intense the disturbance is, accordingly, fluidization of coarse particles is facilitated, the carbon content of cold slag is reduced, and the thermal efficiency of the boiler is improved. Purposes of reducing the emission load of sulfur dioxide and nitrogen oxides and guaranteeing the safe and economic operation of the boiler are achieved.
Description
Technical field:
The utility model relates to air distribution plate and the blast cap in a kind of CFBB.
Background technology:
The CFBB technology be one efficient, clean burning is technological; Improvement through stove internal combustion technology; Reduce SO2, NOX discharge capacity; Receive both at home and abroad generally attention as clean coal technology, along with the raising of environmental protection standard, heat supply and electricity market will further enlarge the demand of recirculating fluidized bed.The technological transformation of blast cap directly has influence on the thermal efficiency of boiler on the boiler grid plate; The aperture wind speed is an important parameter of air distribution plate device design on the blast cap; Blast cap is that fluidized-bed combustion boiler is kept rational two-phase flow in the stove, and can guarantee that the safety and economic operation of boiler plays critical effect.
Summary of the invention:
The purpose of the utility model is exactly the air distribution plate and the blast cap that will provide in a kind of CFBB, and it can reduce the discharge capacity of SO2, NOX, guarantees the safety and the economical operation of boiler.The purpose of the utility model is achieved in that air distribution plate and the blast cap in a kind of CFBB, comprises the slagging pore, and the blast cap hole is characterized in that: air distribution plate is provided with blast cap; Described blast cap adopts the dome of bell-jar, radially is provided with aperture around the blast cap, and each blast cap is provided with aperture 3-8, and hole diameter is 7mm, and aperture is set to three rows from top to bottom and reports to the leadship after accomplishing a task and evenly distribute; Described air distribution plate is provided with slagging pore and blast cap hole, and the percent opening in blast cap hole is 5% on the air distribution plate, and pitch is 1.5 times of blast cap shade diameter.The utility model blast cap anti-wear performance is good, can not produce Lou slag phenomenon, and the blast cap aperture is difficult for stopping up, and the maintenance cleaning is convenient; Air distribution plate is under the particle diameter of going into the stove coal distributes constant situation, and air-flow is big more to the impulsive force of bed bottom particle, and disturbance should be strong more, thereby help coarse grained fluidisation, reduced the phosphorus content of cold slag, improved the thermal efficiency of boiler.Reach the discharge capacity that reduces SO2, NOX, guaranteed the safety of boiler and the purpose of economical operation.
Description of drawings:
Fig. 1 is an air distribution plate design of part sketch map;
Fig. 2 is the utility model structural representation;
1. slagging pore, 2. blast cap hole, 3. blast cap, 4. air distribution plate, 5. blast cap shade, 6. aperture.
The specific embodiment: the utility model is described further below in conjunction with accompanying drawing;
Air distribution plate in a kind of CFBB and blast cap comprise slagging pore 1, and blast cap hole 2 is characterized in that: air distribution plate 4 is provided with blast cap 3; Described blast cap 3 adopts the dome of bell-jars, radially is provided with aperture 6 around the blast cap 3, and each blast cap is provided with aperture 3-8, and aperture 6 diameters are 7mm, and aperture 6 is set to three rows from top to bottom and reports to the leadship after accomplishing a task and evenly distribute; Described air distribution plate 4 is provided with slagging pore 1 and blast cap hole 2, and the percent opening in blast cap hole 2 is 5% on the air distribution plate 4, and pitch is 1.5 times of blast cap shade 5 diameters.During practical implementation, the transformation of blast cap generally will relate to the many conditions and the factors such as rated pressure of air distribution plate percent opening, air distribution plate resistance, blast cap hole air-out speed and the pressure fan of air distribution plate situation in the original boiler, design.According to different type of furnace improvement and design; And with reference to air distribution plate resistance and practical operation situation before transforming; To guarantee that generally the air distribution plate resistance is suitable; Design resistance is crossed conference increases the blower fan power consumption, design too smallly then can reduce blast cap outlet wind speed and influence fluidization quality, the excessive or situation of fluidisation not of critical flow wind transmission amount can occur because of the air distribution plate resistance designs to hang down.In order to reduce improvement cost, and make and transform simplely, also will consider the layout of improved blast cap, whether need be on air distribution plate the problem of perforate again, generally should on the basis of original perforate, carry out as far as possible.In addition, whether the structural design of layout and the blast cap itself of blast cap in siege reasonable, and the material formula of blast cap service life of blast cap and device security are used all is vital.The utility model air distribution plate is to be made by the thick steel plate of 20mm; Radial aperture around the blast cap aperture adopts is provided with 3-8 aperture on each blast cap, hole diameter is 7mm; And aperture is set to three from top to bottom and arranges the evenly layout of reporting to the leadship after accomplishing a task; For example at 3 apertures of first row's radial equipartition, second row reports to the leadship after accomplishing a task 2 apertures is set, and the 3rd row reports to the leadship after accomplishing a task to be uniformly distributed with 3 apertures are set.Above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; Be not limited to the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. air distribution plate and the blast cap in the CFBB comprises slagging pore (1), and blast cap hole (2) is characterized in that: air distribution plate (4) is provided with blast cap (3); Described blast cap (3) adopts the dome of bell-jar, and blast cap (3) radially is provided with aperture (6) all around, and each blast cap (3) is provided with aperture 3-8, and aperture (6) diameter is 7mm, and aperture (6) is set to three rows from top to bottom and reports to the leadship after accomplishing a task and evenly distribute; Described air distribution plate (4) is provided with slagging pore (1) and blast cap hole (2), and the percent opening that air distribution plate (4) is gone up blast cap hole (2) is 5%, and pitch is 1.5 times of blast cap shade (5) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200975313U CN202561732U (en) | 2012-03-15 | 2012-03-15 | Air distribution plate and air cap in circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200975313U CN202561732U (en) | 2012-03-15 | 2012-03-15 | Air distribution plate and air cap in circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202561732U true CN202561732U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200975313U Expired - Fee Related CN202561732U (en) | 2012-03-15 | 2012-03-15 | Air distribution plate and air cap in circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202561732U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335306A (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 system and method of circulating fluidized bed boiler |
| CN103912867A (en) * | 2014-03-25 | 2014-07-09 | 中国华能集团清洁能源技术研究院有限公司 | Low-nitrogen combustion transformation method for circulating fluidized bed boiler |
| CN111237745A (en) * | 2020-01-13 | 2020-06-05 | 洛阳建材建筑设计研究院有限公司 | Non-uniform air distribution fluidized bed and non-uniform air distribution fluidized bed boiling decomposition device |
-
2012
- 2012-03-15 CN CN2012200975313U patent/CN202561732U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335306A (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 system and method of circulating fluidized bed boiler |
| CN103912867A (en) * | 2014-03-25 | 2014-07-09 | 中国华能集团清洁能源技术研究院有限公司 | Low-nitrogen combustion transformation method for circulating fluidized bed boiler |
| CN111237745A (en) * | 2020-01-13 | 2020-06-05 | 洛阳建材建筑设计研究院有限公司 | Non-uniform air distribution fluidized bed and non-uniform air distribution fluidized bed boiling decomposition device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20150315 |
|
| EXPY | Termination of patent right or utility model |