CN101380606A - Bowl type half-speed grinding mill - Google Patents
Bowl type half-speed grinding mill Download PDFInfo
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- CN101380606A CN101380606A CNA2007100940708A CN200710094070A CN101380606A CN 101380606 A CN101380606 A CN 101380606A CN A2007100940708 A CNA2007100940708 A CN A2007100940708A CN 200710094070 A CN200710094070 A CN 200710094070A CN 101380606 A CN101380606 A CN 101380606A
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- bowl
- separator
- burnisher apparatus
- grinding machine
- mill
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Abstract
The invention discloses a bowl type medium-speed mill, which mainly comprises a milling bowl, a grinding roll device and a separator, wherein, the grinding roll device and the milling bowl are used for milling the materials; the milled materials are sent to the separator along with air flow for separation; and the materials with qualified granular dimension are transported out of the mill. Aiming at different properties of limestone, refinery coke, steel slag and other materials and coal, and different requirements to product fineness, the bowl type medium-speed mill can carry out milling by adopting a static and dynamic combined separator and has the advantages of better separation effect, long service life and convenient maintenance.
Description
Technical field
The present invention relates to a kind of grinding machine, especially a kind of bowl of formula middling speed grinding machine.
Background technology
Now, the technology of HP coal pulverizer is very ripe.The major function of HP coal pulverizer is that the raw coal about diameter 40mm is milled into coal dust about diameter 0.075mm, and the electric power supply plant boiler combustion needs.Because boiler of power plant only is about 0.075mm to the requirement of fineness of pulverized coal, requirement is lower relatively, and the HP coal pulverizer adopts the static separation device can reach requirement.Simultaneously, because coal facies are for materials such as lime stone, petroleum coke, slags, its grindability is higher relatively, and it is relatively low that index is washed away in wearing and tearing, less relatively to the wearing and tearing of the part of milling.
The structure of HP bowl pulverizer comprises a body 1 as shown in Figure 1, and mill bowl 3, is positioned at the centre of body 1 bottom; Impeller unit is positioned at the described outside of grinding bowl of body; Burnisher apparatus, be positioned at the top of described mill bowl one side, described Burnisher apparatus comprises a grinding roller 4, described grinding roller contacts with the mill bowl, described Burnisher apparatus and body 1 hinged inside are the center with the pin joint, with described Burnisher apparatus arranged outside spring load-variable device 5 are being arranged, described spring load-variable device 5 withstands described Burnisher apparatus, and described spring load-variable device can transversal stretching; Separator comprises inner cone 6, is positioned in the middle of body 1 middle part, it is a funnel structure, described body 1 top is provided with separator top cover 2, is provided with the static vane group between described inner cone 6 upper edges and the described separator top cover, and the top of described static vane group inside is provided with discharging opening 7.
Its design is mainly milled to coal, if directly prepare lime stone, petroleum coke, the contour fine silt of slag, can there be some problems in its each parts, for example:
(1) impeller unit.The wind speed that the HP coal pulverizer should be located is lower, might cause the carrying capacity of wind less than normal, can not blow afloat the particle after milling; Simultaneously, the wind speed that increases this place might cause eddy current.
(2) mill bowl liner plate.Because the HP coal pulverizer is the coal of milling, it is little with respect to lime stone that index is washed away in its wearing and tearing, if adopt the mill bowl lining material identical with the HP coal pulverizer, then can will reduce greatly service life.
(3) Burnisher apparatus.HP coal pulverizer grinding roller gudgeon adopts eccentric structure, processing cost height, and the on-the-spot complexity of installing.
(4) spring charging device.The spring loading force governor motion of HP coal pulverizer is four king-bolts, need adjust 8 nuts simultaneously when regulating loading force, adjusts complicated; And the loading force of milling for materials such as lime stones is different with loading force to coal, if still adopt the spring loading force identical with the HP coal pulverizer, then may influence the milling efficiency of material.
(5) develop single outlet device.The former coal that is used for power plant grinds mouth and is a plurality of outlets, to satisfy the boiler combustion needs.But adopt warehouse style negative pressure system in the desulfurizer pulverized coal preparation system, grinding machine is required to be single export structure.
And the new technology of latest domestic development, the general granular size that requires to reach about 0.045mm of the contour fine silt of lime stone, petroleum coke, slag that new technology need prepare, so if materials such as mill dry lime stone, petroleum coke, slag, can be with reference to the HP coal pulverizer, its internal structure is improved, to satisfy the needs of different material characteristic.
Development from present technology, though existing part producer can produce the grinding machine of materials such as the lime stone of milling, petroleum coke, slag, and is unsatisfactory from the actual motion effect, show that mainly the part life-span of milling is short, pulverizer adequacy is little, separator inferior separating effect etc.
Summary of the invention
Technical problem to be solved by this invention provides a kind of bowl of formula middling speed grinding machine, can reach with the different qualities of coal at materials such as lime stone, petroleum coke, slags the different requirements of product fineness are milled, and milling efficiency is better, and the grinding machine life-span is longer, and is convenient to safeguard.
For solving the problems of the technologies described above, the technical scheme of bowl formula middling speed grinding machine of the present invention is, comprise a body and:
Grind bowl, be positioned at the centre of body bottom;
Impeller unit is positioned at the described outside of grinding bowl of body;
Burnisher apparatus, be positioned at the top of described mill bowl one side, described Burnisher apparatus comprises a grinding roller, described grinding roller contacts with the mill bowl, described Burnisher apparatus and body hinged inside are the center with the pin joint, with described Burnisher apparatus arranged outside the spring load-variable device are being arranged, described spring load-variable device withstands described Burnisher apparatus, and described spring load-variable device can transversal stretching;
Separator, comprise inner cone, be positioned in the middle of the body middle part, be a funnel structure, described body upper is provided with the separator top cover, is provided with the static vane group between described inner cone upper edge and the described separator top cover, described static vane group inboard is provided with dynamic impeller, described dynamic impeller and described static vane group concentric, described dynamic impeller top is provided with discharging opening, and described dynamic impeller is driven by the drive unit of its top.
The present invention can reach with the different qualities of coal at materials such as lime stone, petroleum coke, slags the different requirements of product fineness are milled, and separating effect is better by adopting the separator of sound combination, and the grinding machine life-span is longer, and is convenient to safeguard.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of existing HP coal pulverizer;
Fig. 2 is the structural representation of bowl formula middling speed grinding machine of the present invention;
Fig. 3 is the schematic diagram of bowl formula middling speed grinding machine Burnisher apparatus of the present invention and spring charging device;
Fig. 4 and Fig. 5 are the schematic diagram of the eccentric center trunnion of Burnisher apparatus hinged place in the existing HP coal pulverizer;
Fig. 6 is the separator of bowl formula middling speed grinding machine of the present invention and the structural representation of single outlet device.
Fig. 7 is the vertical view of bowl formula middling speed grinding machine impeller unit of the present invention;
Fig. 8 is the partial enlarged drawing of bowl formula middling speed grinding machine impeller unit of the present invention;
Fig. 9 is the A-A cutaway view among Fig. 8.
Reference numeral is among the figure, 1. body; 2. separator top cover; 3. grind bowl; 4. Burnisher apparatus; 5. spring load-variable device; 6. inner cone; 7. discharging opening; 8. impeller unit; 9. static vane; 10. dynamic impeller; 11. single outlet device; 12. drive unit; 13. the blade of impeller unit; 14. the pin joint of Burnisher apparatus and body; 15. grinding roller; 16. motor; 17. side body.
The specific embodiment
The invention provides a kind of bowl of formula middling speed grinding machine, as shown in Figure 2, comprise a body 1, and
Grind bowl 3, be positioned at the centre of body 1 bottom;
Impeller unit 8 is positioned at the described outside of grinding bowl 3 of body;
Separator, comprise inner cone 6, being positioned in the middle of body 1 middle part, is a funnel structure, and described body 1 top is provided with separator top cover 2, be provided with static vane group 9 between described inner cone 6 upper edges and the described separator top cover 2, as shown in Figure 6, described static vane group 9 inboards are provided with dynamic impeller 10, described dynamic impeller 10 and described static vane group 9 concentrics, described dynamic impeller 10 tops are provided with discharging opening 11, and described dynamic impeller 10 is driven by the drive unit 12 of its top.
As Fig. 7, Fig. 8 and shown in Figure 9, the blade of described impeller unit is around the arrangement that forms a circle of described mill bowl, and the blade 13 of described impeller unit is obliquely installed.Described impeller unit makes that the air-flow that moved upward by the side body among Fig. 2 can eddy generation, the conveying effect of back material thereby influence is milled.
In Fig. 6, the angle of described static vane 9 can be regulated along its longitudinal axis.
The rotating shaft of described Burnisher apparatus hinged place is coaxial with the rotating shaft of described body hinged place.The Burnisher apparatus of existing HP coal pulverizer is hinged by as shown in Figure 4 and Figure 5 eccentric center trunnion and described body, and like this, eccentric center trunnion includes two axle center, and an eccentric throw is arranged between two axle center.And in bowl formula middling speed grinding machine of the present invention, the motion axle center of how much axle center of grinding roller during with its rotation overlaps.
As shown in Figure 6, described discharging opening is a single outlet device 11, and the exit of its material is provided with a dismountable bend pipe.When the material after milling was outwards carried, in the bending place of pipeline, material can bump with pipeline, thereby causes wearing and tearing.One dismountable bend pipe is set in the exit of material, when wearing and tearing take place this bend pipe, can changes easily, be convenient to the maintenance of equipment.As shown in Figure 6, this bend pipe can adopt ring flange to be connected with equipment.
Bowl formula middling speed grinding machine of the present invention is in when work, the rotation in the horizontal direction of mill bowl, raw material falls into the mill bowl go up after, radial outward moves in the action of centrifugal force lower edge, forms a layered material bed on the mill bowl, the material bed passes through under the Burnisher apparatus that can rotate around the axis.At this moment, the power of milling of spring charging device generation is applied on the raw material of being milled by the grinding roller that rotates.Raw material is milled into powder between mill bowl liner plate and grinding roller.Do radially and the raw material that circumferentially moves is carrying the material that is broken and crosses the mill bowl edge and enter the pumped (conveying) medium hot gas path.
In the mill processes of raw material, less lighter particle is blown afloat from the mill bowl by gaseous conveying medium (hot gas) continuously.
As shown in Figure 2, hot gas enters from side body 17, and the mill bowl external diameter along rotation rises then.Impeller unit makes air-flow be tending towards vertical direction.Less lighter particle is carried upwards by air-flow on mill bowl outer rim, and the heavy external foreign material that are difficult for grinding pass air-flow and fall into the side body area.
Above the mill bowl, the lighter coal grain that is carried by air has experienced three grades of separation processes.
The first order is separated on the horizontal plane that just in time occurs in the mill bowl.Be installed in the fixed gas jet deflector that separates on the body and make the heaviest particle swerve, lose momentum and directly get back on the mill bowl and reface.Lighter particle is carried into separator top cover static vane place by air-flow and carries out second level separation, particle in the wind powder mixture and static vane bump herein, causing heavily, particle loses momentum and lands from air-flow, the static separation blade can improve the uniformity by the wind powder mixture at this place simultaneously, for next stage separates ready.
Enter the Dynamic Separation blade of rotation by the static separation blade immediately than granule, because this place's Dynamic Separation blade produces action of centrifugal force, make and carry gas that the carrying capacity of particle is reduced relatively, and the particle in the wind powder mixture will bump with dynamic blade when passing dynamic blade, cause in these particles more greatly, heavier particle loses momentum and lands from air-flow.
The heavier particle of separating from static and Dynamic Separation blade turns back to the zone of milling of mill bowl along the inwall of inner cone.Cone is separated heavy particle from the coal pulverizer regions of turbulent flow.Heavy particle outside regions of turbulent flow returns the mill bowl under the gravity effect.
It is supporting that bowl formula middling speed grinding machine of the present invention can be coal-fired fired power generating unit flue gas desulphurization system, also can be the system support that other industry needs raw material is ground to form fine powder.
In sum, the present invention can reach with the different qualities of coal at materials such as lime stone, petroleum coke, slags the different requirements of product fineness are milled, and separating effect is better by adopting the separator of sound combination, the grinding machine life-span is longer, and is convenient to safeguard.
Claims (5)
1. a bowl formula middling speed grinding machine comprises a body, and
Grind bowl, be positioned at the centre of body bottom;
Impeller unit is positioned at the described outside of grinding bowl of body;
Burnisher apparatus, be positioned at the top of described mill bowl one side, described Burnisher apparatus comprises a grinding roller, described grinding roller contacts with the mill bowl, described Burnisher apparatus and body hinged inside are the center with the pin joint, in the arranged outside with described Burnisher apparatus the spring load-variable device are arranged, described spring load-variable device withstands described Burnisher apparatus, and described spring load-variable device can transversal stretching;
It is characterized in that, also comprise separator, described separator comprises inner cone, is positioned in the middle of the body middle part, and be a funnel structure, described body upper is provided with the separator top cover, be provided with the static vane group between described inner cone upper edge and the described separator top cover, described static vane group inboard is provided with dynamic impeller, described dynamic impeller and described static vane group concentric, described dynamic impeller top is provided with discharging opening, and described dynamic impeller is driven by the drive unit of its top.
2. bowl according to claim 1 formula middling speed grinding machine is characterized in that, the blade of described impeller unit is around the arrangement that bowl forms a circle of described mill, the blade lean setting of described impeller unit.
3. bowl formula middling speed grinding machine according to claim 1 is characterized in that the angle of described static vane can be regulated along its longitudinal axis.
4. bowl formula middling speed grinding machine according to claim 1 is characterized in that the rotating shaft of described Burnisher apparatus hinged place is coaxial with the rotating shaft of described body hinged place.
5. bowl formula middling speed grinding machine according to claim 1 is characterized in that the exit of described discharging opening is provided with a dismountable bend pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100940708A CN101380606A (en) | 2007-09-06 | 2007-09-06 | Bowl type half-speed grinding mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100940708A CN101380606A (en) | 2007-09-06 | 2007-09-06 | Bowl type half-speed grinding mill |
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| Publication Number | Publication Date |
|---|---|
| CN101380606A true CN101380606A (en) | 2009-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100940708A Pending CN101380606A (en) | 2007-09-06 | 2007-09-06 | Bowl type half-speed grinding mill |
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| CN (1) | CN101380606A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102481579A (en) * | 2009-06-24 | 2012-05-30 | 阿尔斯通技术有限公司 | Force monitor for pulverizer integral spring assembly |
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN103008088A (en) * | 2012-12-27 | 2013-04-03 | 中材（天津）粉体技术装备有限公司 | Automatic stator blade distance adjusting device for vertical roller mill powder concentrator |
| CN104001588A (en) * | 2014-06-20 | 2014-08-27 | 张嘉程 | Superfine vertical roller mill |
| CN104069934A (en) * | 2014-05-04 | 2014-10-01 | 上海宝钢节能环保技术有限公司 | Returning device of vertical roller mill |
| CN104549653A (en) * | 2013-10-23 | 2015-04-29 | 上海重型机器厂有限公司 | Coal mill |
| CN105435905A (en) * | 2015-12-15 | 2016-03-30 | 莱歇研磨机械制造(上海)有限公司 | Double-output-mode vertical mill |
| CN105618202A (en) * | 2016-03-17 | 2016-06-01 | 厦门金邦达实业有限责任公司 | Medium-speed coal mill with airfoil impeller guiding device |
| CN107051706A (en) * | 2017-06-20 | 2017-08-18 | 华北电力大学（保定） | A kind of medium-speed pulverizer being association of activity and inertia |
| CN109311022A (en) * | 2016-06-21 | 2019-02-05 | 通用电气技术有限公司 | For upgrading system, the method and apparatus of pulverizer |
| CN109718937A (en) * | 2017-10-31 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Coal pulverizer emery wheel |
| CN109718935A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Anti- hang-up spring charging device |
| CN109718906A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Discharging valve device |
| CN109718936A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Coal pulverizer spring charging device |
| CN114160268A (en) * | 2021-12-16 | 2022-03-11 | 北京康盛宏达科技有限公司 | Multifunctional roller type vertical mill |
| CN114534890A (en) * | 2022-02-14 | 2022-05-27 | 陈光付 | Medium-speed multi-stage coal mill |
| CN117160602A (en) * | 2023-10-11 | 2023-12-05 | 江苏盛泰电力设备有限公司 | Grinding roller device for coal mill |
-
2007
- 2007-09-06 CN CNA2007100940708A patent/CN101380606A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102481579A (en) * | 2009-06-24 | 2012-05-30 | 阿尔斯通技术有限公司 | Force monitor for pulverizer integral spring assembly |
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN102941141B (en) * | 2012-11-28 | 2014-11-26 | 北京电力设备总厂 | intermediate-speed roller ring mill |
| CN103008088A (en) * | 2012-12-27 | 2013-04-03 | 中材（天津）粉体技术装备有限公司 | Automatic stator blade distance adjusting device for vertical roller mill powder concentrator |
| CN103008088B (en) * | 2012-12-27 | 2014-07-30 | 中材（天津）粉体技术装备有限公司 | Automatic stator blade distance adjusting device for vertical roller mill powder concentrator |
| CN104549653A (en) * | 2013-10-23 | 2015-04-29 | 上海重型机器厂有限公司 | Coal mill |
| CN104069934B (en) * | 2014-05-04 | 2016-03-09 | 上海宝钢节能环保技术有限公司 | A kind of vertical roll grinder material-returning device |
| CN104069934A (en) * | 2014-05-04 | 2014-10-01 | 上海宝钢节能环保技术有限公司 | Returning device of vertical roller mill |
| CN104001588B (en) * | 2014-06-20 | 2016-04-20 | 张嘉程 | Super fine vertical roller grinds |
| CN104001588A (en) * | 2014-06-20 | 2014-08-27 | 张嘉程 | Superfine vertical roller mill |
| CN105435905A (en) * | 2015-12-15 | 2016-03-30 | 莱歇研磨机械制造(上海)有限公司 | Double-output-mode vertical mill |
| CN105618202A (en) * | 2016-03-17 | 2016-06-01 | 厦门金邦达实业有限责任公司 | Medium-speed coal mill with airfoil impeller guiding device |
| CN109311022A (en) * | 2016-06-21 | 2019-02-05 | 通用电气技术有限公司 | For upgrading system, the method and apparatus of pulverizer |
| CN107051706A (en) * | 2017-06-20 | 2017-08-18 | 华北电力大学（保定） | A kind of medium-speed pulverizer being association of activity and inertia |
| CN109718935A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Anti- hang-up spring charging device |
| CN109718906A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Discharging valve device |
| CN109718936A (en) * | 2017-10-30 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Coal pulverizer spring charging device |
| CN109718937A (en) * | 2017-10-31 | 2019-05-07 | 阿尔法（江苏）重工科技有限公司 | Coal pulverizer emery wheel |
| CN114160268A (en) * | 2021-12-16 | 2022-03-11 | 北京康盛宏达科技有限公司 | Multifunctional roller type vertical mill |
| CN114534890A (en) * | 2022-02-14 | 2022-05-27 | 陈光付 | Medium-speed multi-stage coal mill |
| CN114534890B (en) * | 2022-02-14 | 2023-10-20 | 陕西榆能创力智能装备有限公司 | Medium-speed multistage coal mill |
| CN117160602A (en) * | 2023-10-11 | 2023-12-05 | 江苏盛泰电力设备有限公司 | Grinding roller device for coal mill |
| CN117160602B (en) * | 2023-10-11 | 2024-03-12 | 江苏盛泰电力设备有限公司 | Grinding roller device for coal mill |
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Application publication date: 20090311 |