CN103567018A - Rotating nozzle structure of RP coal mill - Google Patents
Rotating nozzle structure of RP coal mill Download PDFInfo
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- CN103567018A CN103567018A CN201310558133.6A CN201310558133A CN103567018A CN 103567018 A CN103567018 A CN 103567018A CN 201310558133 A CN201310558133 A CN 201310558133A CN 103567018 A CN103567018 A CN 103567018A
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- coal
- liner plate
- impeller
- separator liner
- nozzle
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Abstract
The invention relates to a rotating nozzle structure of a RP coal mill. The rotating nozzle structure comprises a coal mill side mill body, a grinding bowl and a separator liner plate, wherein a gap formed between the grinding bowl and the separator liner plate can form a ventilating nozzle; an impeller which is fixed on the coal mill side mill body in a screwing manner is arranged between the grinding bowl and the separator liner plate, one side, which is close to impeller, of the grinding bowl is fixedly provided with a coal blocking ring in the screwing manner, and a first throttling ring is arranged above the impeller and is positioned on one side of the separator liner plate; an adjusting cover is arranged below the separator liner plate by an interval, and the adjusting cover and an outer ring of the impeller are welded and fixed. The rotating nozzle structure provided by the invention has the advantages of being capable of being used in an industry coal pulverizing system, an air power filed of primary hot air flowing the nozzle is changed, the flowing speed of the nozzle is increased, the abrasion of an air outlet edge of a blade, the primary wind resistance and the deslagging amount of pebble coal are reduced, the powder producing effect is improved, the unit energy consumption for powder production is reduced, the structure is simple, the installation is easy, and the overhaul is convenient.
Description
Technical field
The present invention relates to the technical field of RP coal pulverizer, especially a kind of RP coal pulverizer swivel nozzle structure.
Background technology
In known technical field, RP type coal pulverizer is to develop on traditional Raymond bowl mill basis, is a kind of shallow bowl mill.Its adopts taper grinding roller, needs aeroseal, to prevent that hot-air and coal dust from overflowing, pollutes gear-box and grinding roller bearing, but does not need mill exhauster, can be for a wind positive pressure powder-making system, and again can be for negative pressure pulverized coal preparation system.Small-sized RP type coal pulverizer pressurizes to grinding roller with spring, and large-scale RP type coal pulverizer adopts fluid power one strength charger.Grinding roller is independently arranged on mill top, has certain gap between grinding roller and mill, not directly contact, and it regulates the final fineness of coal dust by the angle that regulates coal dust classifier to be folded to blade.RP mill is suitable for grinding meager coal and brown coal.
At present, the nozzle that RP coal pulverizer adopts is mainly static nozzle.When power plant is used static nozzle, one time wind does not match at the airflow state at static nozzle place and the airflow state in coal pulverizer, causes the irregular wear of nozzle part, has reduced the life-span of nozzle; Also cause a wind resistance large, one time wind wind speed is low, and powder process effect is lower, and unit power consumption of coal pulverizing is high, and pebble coal amount directly has influence on greatly the normal operation of coal mill system, makes coal pulverizer economy, energy-saving efficiency not high.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the problems referred to above, a kind of RP coal pulverizer swivel nozzle structure is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of RP coal pulverizer swivel nozzle structure, comprise coal-grinding pusher side body, mill bowl and separator liner plate, gap between described mill bowl and separator liner plate forms ventilation nozzle, between described mill bowl and separator liner plate, be provided with to be spirally connected and be fixed on the impeller on coal-grinding pusher side body, on described mill bowl and near the side at Mo Wan center, be bolted and fixed with gear coal ring, above described impeller and be positioned at separator liner plate one side and be provided with first throttle ring, below described separator liner plate, be interval with and regulate cover, the outer shroud of described adjusting cover and impeller is welded and fixed.
Further, as a kind of concrete embodiment, the present invention is provided with the second restrictor ring at the front end of described first throttle ring.
Further, as a kind of concrete embodiment, described in the present invention, regulating the gap between cover and separator liner plate is 13 ± 1.5mm.
The invention has the beneficial effects as follows: the present invention is for industrial pulverized coal preparation system, by the flow through aerodynamic field of a hot blast of nozzle of change, improved spout flow velocity, reduced the bed drain purge of the wearing and tearing of blade trailing edge, wind resistance and pebble coal, improve the effect of powder process, and reduce the specific energy consumption of powder process, this is simple in structure, install easily, maintenance is convenient.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is cutaway view of the present invention;
In figure: 1. impeller, 2. gear coal ring, 3. the second restrictor ring, 4. first throttle ring, 5. regulates cover, 6. mill bowl, 7. separator liner plate.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
The preferred embodiment of RP coal pulverizer swivel nozzle structure of the present invention as depicted in figs. 1 and 2, comprise coal-grinding pusher side body, mill bowl 6 and separator liner plate 7, gap between described mill bowl 6 and separator liner plate 7 forms ventilation nozzle, between described mill bowl 6 and separator liner plate 7, be provided with to be spirally connected and be fixed on the impeller 1 on coal-grinding pusher side body, on described mill bowl 6 and near a side of grinding bowl 6 centers, be bolted and fixed with gear coal ring 2, above described impeller 1 and be positioned at separator liner plate 7 one sides and be provided with first throttle ring 4, front end at described first throttle ring 4 is provided with the second restrictor ring 3, can select dress according to on-the-spot actual operating mode, below described separator liner plate 7, be interval with and regulate cover 5, gap between described adjusting cover 5 and separator liner plate 7 is 13 ± 1.5mm, described adjusting cover 5 is welded and fixed with the outer shroud of impeller 1.
The size that in the present embodiment, first throttle ring 4 can change swivel nozzle draught area with the second restrictor ring 3 is to adapt to the different inner cavity size of coal pulverizer, regulate nozzle place air velocity, regulate the seal clearance between cover 5 capable of regulating sound, stop a wind to casing, wearing and tearing casing.Swivel nozzle in the present embodiment has improved wind at the flow condition at nozzle place, airflow state in itself and coal pulverizer is matched, make swivel nozzle even wearing, life-span is improved 2～3 times than stationary nozzle, greatly reduce the resistance of a wind, thereby improved milling efficiency, and reduced unit power consumption of coal pulverizing, once distinguished and admirable speed due to nozzle place is tending towards rationally in addition, makes the bed drain purge of pebble coal also be tending towards normal.
The above-mentioned foundation desirable embodiment of the present invention of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (3)
1. a RP coal pulverizer swivel nozzle structure, comprise coal-grinding pusher side body, mill bowl (6) and separator liner plate (7), gap between described mill bowl (6) and separator liner plate (7) forms ventilation nozzle, it is characterized in that: between described mill bowl (6) and separator liner plate (7), be provided with to be spirally connected and be fixed on the impeller (1) on coal-grinding pusher side body, one side upper at described mill bowl (6) and close mill bowl (6) center is bolted and fixed with gear coal ring (2), in the top of described impeller (1) and be positioned at separator liner plate (7) one sides and be provided with first throttle ring (4), in the below of described separator liner plate (7), be interval with and regulate cover (5), described adjusting cover (5) is welded and fixed with the outer shroud of impeller (1).
2. RP coal pulverizer swivel nozzle structure as claimed in claim 1, is characterized in that: the front end at described first throttle ring (4) is provided with the second restrictor ring (3).
3. RP coal pulverizer swivel nozzle structure as claimed in claim 1, is characterized in that: the gap between described adjusting cover (5) and separator liner plate (7) is 13 ± 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558133.6A CN103567018A (en) | 2013-11-12 | 2013-11-12 | Rotating nozzle structure of RP coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310558133.6A CN103567018A (en) | 2013-11-12 | 2013-11-12 | Rotating nozzle structure of RP coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103567018A true CN103567018A (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310558133.6A Pending CN103567018A (en) | 2013-11-12 | 2013-11-12 | Rotating nozzle structure of RP coal mill |
Country Status (1)
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| CN (1) | CN103567018A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5090631A (en) * | 1990-10-15 | 1992-02-25 | Wark Rickey E | Air flow rate control device for pulverizer vane wheel |
| EP0507983A1 (en) * | 1991-04-09 | 1992-10-14 | March-Southwestern Corporation | A pulverizer mill with a rotating throat/air port ring assembly |
| US5819947A (en) * | 1996-01-29 | 1998-10-13 | Sure Alloy Steel Corporation | Classifier cage for rotating mill pulverizers |
| CN201534101U (en) * | 2009-10-28 | 2010-07-28 | 石福军 | Bowel-type medium speed coal mill |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN202212230U (en) * | 2011-08-02 | 2012-05-09 | 北京昊蓬机电设备有限公司 | Impeller for HP series bowl type coal mills |
| 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 |
| CN203540628U (en) * | 2013-11-12 | 2014-04-16 | 北京新源宝通电力设备有限公司 | Rotating spraying nozzle structure of RP coal mill |
-
2013
- 2013-11-12 CN CN201310558133.6A patent/CN103567018A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5090631A (en) * | 1990-10-15 | 1992-02-25 | Wark Rickey E | Air flow rate control device for pulverizer vane wheel |
| EP0507983A1 (en) * | 1991-04-09 | 1992-10-14 | March-Southwestern Corporation | A pulverizer mill with a rotating throat/air port ring assembly |
| US5819947A (en) * | 1996-01-29 | 1998-10-13 | Sure Alloy Steel Corporation | Classifier cage for rotating mill pulverizers |
| CN201534101U (en) * | 2009-10-28 | 2010-07-28 | 石福军 | Bowel-type medium speed coal mill |
| CN101947484A (en) * | 2010-09-10 | 2011-01-19 | 浙江省电力试验研究院 | Method for reducing discharge capacity of cobble coal of intermediate-speed coal mill |
| CN202212230U (en) * | 2011-08-02 | 2012-05-09 | 北京昊蓬机电设备有限公司 | Impeller for HP series bowl type coal mills |
| 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 |
| CN203540628U (en) * | 2013-11-12 | 2014-04-16 | 北京新源宝通电力设备有限公司 | Rotating spraying nozzle structure of RP coal mill |
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Application publication date: 20140212 |