CN104772207A - Guide apparatus of medium speed coal mill vane throat ring - Google Patents
Guide apparatus of medium speed coal mill vane throat ring Download PDFInfo
- Publication number
- CN104772207A CN104772207A CN201510051054.5A CN201510051054A CN104772207A CN 104772207 A CN104772207 A CN 104772207A CN 201510051054 A CN201510051054 A CN 201510051054A CN 104772207 A CN104772207 A CN 104772207A
- Authority
- CN
- China
- Prior art keywords
- vane
- guide plate
- restrictor ring
- deflector
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a guide apparatus of a medium speed coal mill vane throat ring. The guide apparatus comprises a guide plate, the guide plate is arranged at the lower portion of the medium speed coal mill vane throat ring, the upper end of the guide plate is fixed to the edge of the throat ring close to a vane outlet area, and the lower end of the guide plate is fixed to the edge of a vane inlet close to a primary air chamber. The upper end of the guide plate has a same arc degree with the flow position wall surface of the throat ring, the lower end of the guide plate has a same arc degree with the inlet wall surface of the vane, two sides of the guide plate are inclined planes, an inclined angle between each of the inclined planes and a horizontal plane is same to the inclined angles of eddy flow blades, and the thickness of the guide plate is not lower than 5mm. The quantity of the guide plate is same to the quantity of the eddy flow blades in the vane. The guide apparatus can reduce local resistance of the throat ring, reduces the mill bowl differential pressure by about 500Pa, and also reduces the air leakage rate of the dynamic and static clearance of the vane in order to increase the air speed of the outlet of the vane, reduce the pebble coal discharge rate and improve the milling output of the coal mill.
Description
Technical field
The invention belongs to mechanical component field, relate to the guiding device of medium-speed pulverizer vane restrictor ring.
Background technology
Medium-speed pulverizer vane generally in order to regulate and adapt to the needs of coal type change, all gets larger circulation area during design, is then regulated the size of actual discharge area by restrictor ring.The actual circulation area installed after restrictor ring is determined jointly by many factors such as stone coal discharge rate, circulating resistance, Mill outputs, generally always need less stone coal discharge rate, less circulating resistance, larger Mill output etc., in fact these three kinds of principal elements can influence each other, what such as stone coal discharge rate controlled is less, just need less circulation area to increase vane air outlet velocity, just make circulating resistance increase, Mill output also may be caused to reduce.Simultaneously, because vane dynamic and static gaps leaks out the existence of factor, the change of the local resistance at vane restrictor ring place also will cause the air quantity flowing through vane to change, vane local resistance is less, the air quantity flowing through vane is larger, vane air outlet velocity is also higher, is also conducive to reducing stone coal discharge rate, is even conducive to promoting Mill output.
Summary of the invention
In order to solve the reduction vane circulating resistance related in background technology, the problem reducing stone coal discharge rate, the invention provides the guiding device of medium-speed pulverizer vane restrictor ring, can under the prerequisite not affecting the existing restrictor ring structure of coal pulverizer, reduce vane local resistance, improve vane air outlet velocity, reduce stone coal discharge rate.
The technical solution adopted for the present invention to solve the technical problems:
The present invention includes deflector, this deflector is arranged on the bottom of coal pulverizer vane restrictor ring, and this deflector upper end is fixed on the edge of restrictor ring near vane exit region, and lower end is fixed on the edge of vane entrance near an air compartment.
The upper end of described deflector is identical with the circular arc degree of restrictor ring circulation place wall, and lower end is identical with the circular arc degree of vane porch wall.
The both sides of described deflector are inclined-plane, and this inclined-plane is identical with the oblique angle of the oblique angle that horizontal plane is formed and swirl vane.
The material of described deflector adopts the abrasion-resistant stee identical with vane restrictor ring.
Connection between described deflector and vane adopts welding manner.
Described deflector thickness is more than or equal to 5mm.
The quantity of described deflector is identical with the swirl vane quantity in vane.
The invention has the beneficial effects as follows:
Increase deflector under restrictor ring after, when primary air flow is constant, the local resistance at restrictor ring place reduces, mill bowl differential pressure decline about 500Pa can be made, meanwhile, the air leak rate of air curtain of vane dynamic and static gaps can be made to reduce, thus increase vane air outlet velocity, reduce stone coal discharge rate, even improve coal pulverizer Mill output.There is the value of significant energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is HP medium-speed pulverizer structural representation, and the enlarged fragmentary portion at vane place is cardinal principle schematic diagram of the present invention;
Fig. 2 is deflector front view.
In figure, 1, mill bowl; 2, restrictor ring; 3, vane outlet; 4, vane dynamic and static gaps; 5, vane entrance; 6, deflector; 7, swirl vane.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2, the guiding device of medium-speed pulverizer vane restrictor ring comprises deflector 6.
Deflector 6 is increased in the bottom of existing coal pulverizer vane restrictor ring 2.
Described deflector 6 upper end is fixed on restrictor ring 2 exports 3 regions edge near vane, and lower end is fixed on the edge of vane entrance 5 near an air compartment.
Described deflector 6 is in order to better coordinate with vane, and its upper end is identical with the circular arc degree of restrictor ring 2 circulation place wall, and its lower end is identical with the circular arc degree of vane entrance 5 place wall.
As shown in Fig. 2, described deflector 6 is in order to coordinate with the swirl vane 7 in vane, and its both sides should be inclined-plane, and oblique angle is consistent with the oblique angle of swirl vane 7.
The material suggestion of described deflector 6 adopts the abrasion-resistant stee identical with vane restrictor ring 2, connection between deflector 6 and vane adopts welding manner, for ensureing structural strength, deflector 6 thickness should be 5mm and more than, the actual size of deflector 6 should determine according to the physical dimension of actual coal pulverizer vane inside, and the quantity of deflector 6 is identical with swirl vane 7 quantity in vane.
The course of work of the present invention is as follows:
After restrictor ring increases deflector 62 times, when primary air flow is constant, the local resistance at restrictor ring place reduces, mill bowl 1 differential pressure decline about 500Pa can be made, meanwhile, the air leak rate of air curtain of vane dynamic and static gaps can be made to reduce, thus increase vane air outlet velocity, reduce stone coal discharge rate, even improve coal pulverizer Mill output.There is the value of significant energy-saving and emission-reduction.
Claims (7)
1. the guiding device of medium-speed pulverizer vane restrictor ring, it is characterized in that comprising deflector, this deflector is arranged on the bottom of coal pulverizer vane restrictor ring, and this deflector upper end is fixed on the edge of restrictor ring near vane exit region, and lower end is fixed on the edge of vane entrance near an air compartment.
2. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, it is characterized in that the upper end of described deflector is identical with the circular arc degree of restrictor ring circulation place wall, lower end is identical with the circular arc degree of vane porch wall.
3. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, it is characterized in that the both sides of described deflector are inclined-plane, and this inclined-plane is identical with the oblique angle of the oblique angle that horizontal plane is formed and swirl vane.
4. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, is characterized in that the material of described deflector adopts the abrasion-resistant stee identical with vane restrictor ring.
5. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, is characterized in that the connection between described deflector and vane adopts welding manner.
6. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, is characterized in that described deflector thickness is more than or equal to 5mm.
7. the guiding device of medium-speed pulverizer vane restrictor ring as claimed in claim 1, is characterized in that the quantity of described deflector is identical with the swirl vane quantity in vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051054.5A CN104772207A (en) | 2015-01-30 | 2015-01-30 | Guide apparatus of medium speed coal mill vane throat ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051054.5A CN104772207A (en) | 2015-01-30 | 2015-01-30 | Guide apparatus of medium speed coal mill vane throat ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104772207A true CN104772207A (en) | 2015-07-15 |
Family
ID=53614155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510051054.5A Pending CN104772207A (en) | 2015-01-30 | 2015-01-30 | Guide apparatus of medium speed coal mill vane throat ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104772207A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949855A (en) * | 1982-09-14 | 1984-03-22 | 太平洋セメント株式会社 | Shaft type mill |
| CN202655103U (en) * | 2012-03-19 | 2013-01-09 | 广东拓奇电力技术发展有限公司 | Air ring of coal mill |
| CN102896023A (en) * | 2012-10-23 | 2013-01-30 | 中国神华能源股份有限公司 | Bowl type coal mill |
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| CN204034849U (en) * | 2014-08-21 | 2014-12-24 | 大唐林州热电有限责任公司 | A kind of novel impeller device |
| CN204469869U (en) * | 2015-01-30 | 2015-07-15 | 浙江大学 | A kind of guiding device of medium-speed pulverizer vane restrictor ring |
-
2015
- 2015-01-30 CN CN201510051054.5A patent/CN104772207A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949855A (en) * | 1982-09-14 | 1984-03-22 | 太平洋セメント株式会社 | Shaft type mill |
| CN202655103U (en) * | 2012-03-19 | 2013-01-09 | 广东拓奇电力技术发展有限公司 | Air ring of coal mill |
| CN102896023A (en) * | 2012-10-23 | 2013-01-30 | 中国神华能源股份有限公司 | Bowl type coal mill |
| CN103406191A (en) * | 2013-07-19 | 2013-11-27 | 国家电网公司 | HP type medium-speed coal mill, and method for reducing pebble coal discharge amount of HP type medium-speed coal mill |
| CN204034849U (en) * | 2014-08-21 | 2014-12-24 | 大唐林州热电有限责任公司 | A kind of novel impeller device |
| CN204469869U (en) * | 2015-01-30 | 2015-07-15 | 浙江大学 | A kind of guiding device of medium-speed pulverizer vane restrictor ring |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150715 |
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| WD01 | Invention patent application deemed withdrawn after publication |