CN203540628U - Rotating spraying nozzle structure of RP coal mill - Google Patents
Rotating spraying nozzle structure of RP coal mill Download PDFInfo
- Publication number
- CN203540628U CN203540628U CN201320709445.8U CN201320709445U CN203540628U CN 203540628 U CN203540628 U CN 203540628U CN 201320709445 U CN201320709445 U CN 201320709445U CN 203540628 U CN203540628 U CN 203540628U
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- coal
- impeller
- lining plate
- separator
- nozzle
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Abstract
The utility model relates to a rotating spraying nozzle structure of an RP coal mill. The rotating spraying nozzle structure comprises a side machine body of the coal mill, a milling bowl and a separator lining plate, wherein a gap between the milling bowl and the separator lining plate forms a ventilating nozzle, an impeller which is spirally connected and fixed on the side machine body of the coal mill is arranged between the milling bowl and the separator lining plate, a coal retaining ring is spirally connected and fixed on one side of the milling bowl, close to the impeller, a first restrictor ring is arranged on one side of the separator lining plate and above the impeller, adjusting covers are arranged below the separator lining plate at intervals, and are welded and fixed together with the outer ring of the impeller. The rotating spraying nozzle structure of the RP coal mill is used in an industrial coal pulverizing system, the air dynamic field of primary hot air flowing through the nozzle is changed to improve the nozzle flow velocity, the abrasion to the air outlet edge of the blade, the primary air resistance and the deslagging quantity of pebble coal are reduced, the pulverizing efficiency is improved, and the unit energy consumption for pulverization is reduced, the structure is simple, the installation is easy and the maintenance is convenient.
Description
Technical field
The utility model 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-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 problems to be solved in the utility model is: overcome the problems referred to above, a kind of RP coal pulverizer swivel nozzle structure is provided.
The utility model solves the technical scheme that its technical problem adopts: 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 utility model 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 utility model, regulating the gap between cover and separator liner plate is 13 ± 1.5mm.
The beneficial effects of the utility model are: the utility model 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 utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is cutaway view of the present utility model;
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
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.
The preferred embodiment of the utility model RP coal pulverizer swivel nozzle structure 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 utility model 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 (2)
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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320709445.8U CN203540628U (en) | 2013-11-12 | 2013-11-12 | Rotating spraying nozzle structure of RP coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320709445.8U CN203540628U (en) | 2013-11-12 | 2013-11-12 | Rotating spraying nozzle structure of RP coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203540628U true CN203540628U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320709445.8U Expired - Lifetime CN203540628U (en) | 2013-11-12 | 2013-11-12 | Rotating spraying nozzle structure of RP coal mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN203540628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567018A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Rotating nozzle structure of RP coal mill |
-
2013
- 2013-11-12 CN CN201320709445.8U patent/CN203540628U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567018A (en) * | 2013-11-12 | 2014-02-12 | 北京新源宝通电力设备有限公司 | Rotating nozzle structure of RP coal mill |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |