CN102962120A - Powder recovery separator of power station boiler - Google Patents
Powder recovery separator of power station boiler Download PDFInfo
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- CN102962120A CN102962120A CN2012105393597A CN201210539359A CN102962120A CN 102962120 A CN102962120 A CN 102962120A CN 2012105393597 A CN2012105393597 A CN 2012105393597A CN 201210539359 A CN201210539359 A CN 201210539359A CN 102962120 A CN102962120 A CN 102962120A
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- coal
- powder
- fixedly connected
- separator
- powder recovery
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Abstract
The invention relates to a powder recovery separator of a power station boiler, belonging to a powder recovery supporting device of the power station boiler. The upper part of the body is fixedly connected with an air locking apparatus, the inner part of the body is fixedly connected with an impact awl of which the cross section is in the shape of an equilateral triangle, the body below the impact awl is provided with an air inlet, the body above the impact awl is provided with a qualified powder outlet opening obliquely upwards, the inner wall of the body below the impact awl is fixedly connected with a baffle, and a dropping port is arranged below the body. The separator is novel in structure, and can be applied to a powder recovery pipe to send qualified coal powder back to primary air flow through winnowing inertia separation and impact and return unqualified coal powder back to a steel ball coal mill. By use of the powder recovery separator, the unit consumption of milling can be reduced by 5-7kWh/t of coal and the energy saving effect is remarkable.
Description
Technical field
The invention belongs to time powder corollary apparatus of station boiler.
Background technology
Power plant boiler low speed coal mill the ball type pulverizer system mainly is comprised of low speed coal mill, mill separator, cyclone separator, Powder discharging fan etc.The energy consumption of pulverized coal preparation system is generally with kWh/t
CoalCalculating, is the summation of coal-grinding unit consumption and Powder discharging fan unit consumption.About 22～the 38kwh/t of its numerical value
Coal(being subjected to ature of coal, fineness of pulverized coal, pulverized coal preparation system device characteristics, the impacts such as operation level) with the supporting boiler of 200MW unit, per hour consumes coal 100t approximately, if move 6000～7000 hours every year, will consume very large electric weight every year.So reduction pulverized coal preparation system energy consumption is very important, this wherein mainly contains optimal ventilation amount, best maximum coal load quantity in ball amount, the mill, the Operation Mode Optimizations such as rational fineness of pulverized coal of carrying.In addition, the characteristic of mill separator also is an important ring, the basic role of mill separator is: from low speed coal mill coal dust out, produce carrying of air quantity by Powder discharging fan and enter mill separator, satisfactory coal dust is from outlet output, and undesirable coal dust is got back to coal pulverizer from powder retrieving pipe and again regrinded.Test is found, through returning in the powder of mill separator, still have the satisfactory coal dust about 20%, come back in the coal pulverizer, and the circulating ratio of the axial tailing classifier of at present extensive use is generally about 1.5, this causes very large energy consumption waste, and also can increase the steel ball consumption in the coal pulverizer.If do not allow in the powder retrieving pipe satisfactory coal dust get back in the coal pulverizer, pulverizer capacity will improve a lot, and energy-saving effect will be very remarkable, and the wearing and tearing of steel ball also can alleviate, and its meaning is very large beyond doubt.But the falling direction that returns the coal grain (powder) in the powder is identical with centrifugal force, and wish sub-elects qualified coal dust from these mixtures, needs a New Type of Separator of design.
Summary of the invention
The invention provides a kind of station boiler and return the powder separator, again get back in the coal pulverizer to solve the qualified coal dust that present mill separator exists, the problem of considerable influence will be arranged pulverizer capacity.
The technical scheme that the present invention takes is: the top of body is fixedly connected with lock wind apparatus, be fixedly connected with cross section in body interior and be the bump cone of " " shape, the cross section of bump cone is equilateral triangle, on the body of this bump cone below air inlet is arranged, body above the bump cone has the qualified powder outlet of oblique upper opening, inner body wall below the bump cone is fixedly connected with dividing plate, and there is blanking port the below of body.
Advantage of the present invention is novel structure, and the present invention is applied on the powder retrieving pipe, by selection by winnowing inertial separation, bump, qualified coal dust is sent back in the primary air, and defective coal dust is got back to low speed coal mill.Can make unit power consumption of coal pulverizing reduce by 5～7kwh/t by using
Coal, energy-saving effect is very remarkable.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
The top of body 1 is fixedly connected with lock wind apparatus 2, be fixedly connected with cross section in body interior and be the bump cone 3 of " " shape, the cross section of this bump cone is equilateral triangle, on the body of this bump cone below air inlet 4 is arranged, body above the bump cone has the qualified powder outlet 5 of oblique upper opening, inner body wall below the bump cone is fixedly connected with dividing plate 6, and there is blanking port 7 below of body.
The wind powder mixture that exports out through coal pulverizer enters body from the twice lock wind apparatus that the top arranges, making after being folded to behind the coal grain bump bump cone is a kind of parabolic motion, from the wind direction blowing up that air inlet enters, qualified powder is drawn from qualified powder outlet; The medium grain coal dust enters the passage of dividing plate and body formation and gets back in the coal pulverizer under wind and projectile motion effect; And larger pointed to conduit wall because of its parabola direction and can not enter two wing passages, directly the whereabouts; So just play the effect that grading is processed, be conducive to improve separating effect.
Claims (1)
1. a station boiler returns the powder separator, it is characterized in that: the top of body is fixedly connected with lock wind apparatus, be fixedly connected with cross section in body interior and be the bump cone of " " shape, the cross section of bump cone is equilateral triangle, on the body of this bump cone below air inlet is arranged, body above the bump cone has the qualified powder outlet of oblique upper opening, and the inner body wall below the bump cone is fixedly connected with dividing plate, and there is blanking port the below of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105393597A CN102962120A (en) | 2012-12-13 | 2012-12-13 | Powder recovery separator of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105393597A CN102962120A (en) | 2012-12-13 | 2012-12-13 | Powder recovery separator of power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102962120A true CN102962120A (en) | 2013-03-13 |
Family
ID=47792722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105393597A Pending CN102962120A (en) | 2012-12-13 | 2012-12-13 | Powder recovery separator of power station boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN102962120A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437793A (en) * | 2014-09-18 | 2015-03-25 | 孙家鼎 | Energy saving method for separating pulverized coal fineness of coal mill |
| CN108253400A (en) * | 2018-01-29 | 2018-07-06 | 湖南湘讯企业管理有限公司 | A kind of hot wind water conservancy diversion station boiler |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371782A (en) * | 1964-12-11 | 1968-03-05 | Meyer Paul | Centrifugal air classifiers |
| GB1135913A (en) * | 1966-02-23 | 1968-12-11 | Miag Muehlenbau & Ind Gmbh | Method and apparatus for pneumatically sifting loose material |
| CN2085264U (en) * | 1991-02-12 | 1991-09-25 | 石家庄热电厂 | Double axial, parallel and centriful type coarse powder separator |
| JPH0852432A (en) * | 1994-08-11 | 1996-02-27 | Chichibu Onoda Cement Corp | Classification method and device therefor |
| CN1154876A (en) * | 1996-01-18 | 1997-07-23 | 张庆众 | Method and apparatus for promoting power of coal mill |
| CN2382483Y (en) * | 1999-07-12 | 2000-06-14 | 西安建筑科技大学 | High efficiency energy saving eddy air grading machine |
| JP2012192387A (en) * | 2011-03-18 | 2012-10-11 | Hiroshima Univ | Powder classification apparatus |
| CN203002458U (en) * | 2012-12-13 | 2013-06-19 | 吉林省电力有限公司电力科学研究院 | Powder return separator for power station boiler |
-
2012
- 2012-12-13 CN CN2012105393597A patent/CN102962120A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371782A (en) * | 1964-12-11 | 1968-03-05 | Meyer Paul | Centrifugal air classifiers |
| GB1135913A (en) * | 1966-02-23 | 1968-12-11 | Miag Muehlenbau & Ind Gmbh | Method and apparatus for pneumatically sifting loose material |
| CN2085264U (en) * | 1991-02-12 | 1991-09-25 | 石家庄热电厂 | Double axial, parallel and centriful type coarse powder separator |
| JPH0852432A (en) * | 1994-08-11 | 1996-02-27 | Chichibu Onoda Cement Corp | Classification method and device therefor |
| CN1154876A (en) * | 1996-01-18 | 1997-07-23 | 张庆众 | Method and apparatus for promoting power of coal mill |
| CN2382483Y (en) * | 1999-07-12 | 2000-06-14 | 西安建筑科技大学 | High efficiency energy saving eddy air grading machine |
| JP2012192387A (en) * | 2011-03-18 | 2012-10-11 | Hiroshima Univ | Powder classification apparatus |
| CN203002458U (en) * | 2012-12-13 | 2013-06-19 | 吉林省电力有限公司电力科学研究院 | Powder return separator for power station boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437793A (en) * | 2014-09-18 | 2015-03-25 | 孙家鼎 | Energy saving method for separating pulverized coal fineness of coal mill |
| CN108253400A (en) * | 2018-01-29 | 2018-07-06 | 湖南湘讯企业管理有限公司 | A kind of hot wind water conservancy diversion station boiler |
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |