CN104368433A - Integrated separator applied to fixed vane and movable vane of intermediate-speed coal mill - Google Patents
Integrated separator applied to fixed vane and movable vane of intermediate-speed coal mill Download PDFInfo
- Publication number
- CN104368433A CN104368433A CN201410633415.2A CN201410633415A CN104368433A CN 104368433 A CN104368433 A CN 104368433A CN 201410633415 A CN201410633415 A CN 201410633415A CN 104368433 A CN104368433 A CN 104368433A
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- Prior art keywords
- coal
- separator
- vane
- stator blade
- cage
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- 239000003245 coal Substances 0.000 title claims abstract description 65
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 15
- 230000008859 change Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011088 calibration curve Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000011044 inertial separation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses an integrated separator applied to a fixed vane and a movable vane of an intermediate-speed coal mill. The separator comprises a separator body mounted above a coal milling chamber and a coal falling pipe extending from the center of the separator body to the middle part of the coal milling chamber, wherein more than two top discharging holes communicated with the coal milling chamber are formed in the upper part of the separator body; a vane cage extending into the middle part of the coal milling chamber and surrounding around the coal falling pipe is arranged inside the separator body; a power device capable of driving the vane cage to rotate is also arranged inside the separator body; a fixed vane surrounding the periphery of the vane cage and vertically arranged is arranged outside the bane cage; outlets in the upper ends of the fixed vane and the vane cage are communicated with the top discharging holes. The integrated separator applied to the fixed vane and the movable vane of the intermediate-speed coal mill has the advantages that the coal powder fineness is continuously adjusted according to the change of the coal quality; the best fineness of the coal powder combusted in a boiler under negative load can be retained; the coal powder is adjustable in fineness and high in uniformity; the separator is uniform in separation and high in separation efficiency; when the ventilation quantity is changed, the coal powder fineness can be controlled to be unchanged.
Description
Technical field
The present invention relates to the separator for coal mill used in a kind of firepower power station coal-burning boiler pulverized coal preparation system, specifically a kind of medium-speed pulverizer moving-stator blade is in conjunction with separator.
Background technology
Pulverized coal preparation system is the important accessory system in thermal power plant, and its operation conditions directly affects the safety and economic operation of boiler.Mill separator is as the key equipment in pulverized coal preparation system, affect fineness of pulverized coal and the topmost equipment of pulverized coal fineness, its runnability has a great impact the operation of boiler and efficiency of combustion, less fineness of pulverized coal and larger pulverized coal fineness index are not only conducive to the raising of boiler combustion efficiency, and be conducive to the discharge reducing NOX, contribute to system and run steadily in the long term.
But, for a long time the mill separator of traditional structure also exist always comprehensive separative efficiency low, go out that powder fineness does not reach requirement, goes out powder fineness lack of homogeneity, to return powder fineness little, lack of homogeneity, return powder amount (many qualified coal dusts because of separative efficiency difference cannot separate) bigger than normal, fineness of pulverized coal can not carry out the problem such as regulating along with coal type change.In recent years, some manufactories and scientific research department have developed some novel mill separators, its performance makes moderate progress, but these separators still adopt traditional static separation technology, the adjustment of fineness of pulverized coal still mainly relies on manual regulating fender angle to realize, and therefore a lot of problem is not fundamentally resolved.Such as: several years ago, more domestic research institutes are on the basis of radial baffle plate mill separator, merely change radial baffle plate into axial baffle and increase overhead height, other position does not change substantially, although, it is superior compared with radial mode that this mill separator observes its runnability through actual motion, but also expose its self intrinsic defect, especially inner cone still adopts the inner cone of former radial mode mill separator, cause inner separative efficiency low, and often there is gas powder short circuit phenomenon, meal fineness and uniformity are still not ideal enough, and limit Mill output.
Summary of the invention
The technical problem to be solved in the present invention be to provide one can coal-grinding effective, powder delivery good evenness, it is low and can regulate segregation ratio to return powder rate, and the high medium-speed pulverizer moving-stator blade of separation accuracy is in conjunction with separator.
In order to solve the problems of the technologies described above, medium-speed pulverizer moving-stator blade of the present invention is in conjunction with separator, comprise the separator body that is arranged on above coal-grinding chamber and extend into the coal spout in the middle part of coal-grinding chamber from separator body center, the top being separated body is provided with the plural top discharge mouth communicated with coal-grinding chamber, be provided with in separator body and extend in the middle part of coal-grinding chamber and the leaf cage be looped around outside coal spout, the power set that leaf cage can be driven to rotate also are provided with in separator body, be placed with outside leaf cage and be looped around leaf cage periphery and the stator blade vertically arranged, the outlet of stator blade and leaf cage upper end communicates with top discharge mouth.
Described power set comprise variable-frequency motor and turbine worm reducer, described coal spout is provided with the rotor be looped around outside coal spout, the bottom of rotor is fixedly connected with leaf cage, the upper end of described rotor is connected with driven pulley, the power output shaft of described turbine worm reducer is provided with drive pulley, driven pulley and drive pulley are provided with belt.
Described leaf cage comprises the spaced moving vane of multi-disc, and the lower end of moving vane has intilted angle, the Formation cross-section shape gap that diminishes gradually of opening from the bottom up between moving vane and stator blade.
Described rotor is arranged in a urceolus by bearing, and described urceolus is provided with gas sealing mechanism.
Described urceolus is provided with temperature measuring equipment.
The invention has the advantages that:
1, constantly fineness of pulverized coal can be adjusted according to the change of ature of coal, make boiler combustion more complete, more economical, make boiler operatiopn safer, overcome the problem that unburned carbon in flue dust is ascended to heaven, exhaust gas temperature rises, desuperheating water increases that coal varitation causes, also can avoid the phenomenon burning out burner nozzle and furnace wall cooling coking, add the adaptive capacity of boiler;
When 2, can maintain underload, the best fineness of pulverized coal of boiler combustion, improves combustion economization; Fineness of pulverized coal is adjustable, and pulverized coal fineness is good, can meet the requirement of boiler low load stable combustion better, increases the peak modulation capacity of boiler, and fineness of pulverized coal requires higher;
3, be separated evenly, outlet coal dust evenness index is high, and coal dust more even then corase particles content is few, and uniformity increases, and ash content carbon can obviously decline;
4, separative efficiency is high, can improve pulverized coal preparation system EIAJ more than 5%, reduces pulverized coal preparation system consumption rate, also can increase the deposit of exerting oneself of pulverized coal preparation system;
5, good, the fineness of pulverized coal fineness can be adjusted to very low level, be conducive to the obviously lower of low-NOx combustor ash content carbon, and the reduction of fuel type NOx, can effectively promote power plant and install low NOx combustion system additional, be conducive to the emission level that boiler reduces NOx, reduce environmental pollution;
6, apply in unit pulverized-coal system, also help the uniform distribution of coal powder density in coal pulverizer export coal tube cell, reduce the generation of boiler flyash carbon content and minimizing NOx;
7, its control determines rotor speed according to the calibration curve drawn out when coal-supplying amount and field adjustable, frequency converter changes variable-frequency motor rotating speed, thus change dynamic separator rotating speed, regulative mode simple and flexible, can frequency converter adjustment or access DCS system regulate at central station of floating dock on the spot;
8, when ventilation changes, fineness of pulverized coal can be controlled do not change, owing to decreasing the rate of refacing of qualified coal dust, powder process power consumption more than 10% can be reduced, reduce boiler unburned carbon loss and heat loss due to exhaust gas, improve boiler thermal output, reduce unburned carbon in flue dust about 0.8% (remarkable in economical benefits, about six months can recoup capital outlay);
9, because Inner eycle duty ratio static separation device is little, so can pulverizer capacity be improved, this realizes because separative efficiency improves, in other words avoid the grinding times again that fine particle (granularity is less than 200 objects) is unnecessary, coal dust qualified so just can discharge coal pulverizer faster; That is: identical ature of coal with can improve pulverizer capacity or identical ature of coal under fineness requirement and exert oneself require under can improve fineness of pulverized coal;
10, it adopts the mode of being association of activity and inertia, fineness and good evenness, and compact conformation, stable, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of medium-speed pulverizer moving-stator blade of the present invention in conjunction with separator.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, medium-speed pulverizer moving-stator blade of the present invention is described in further detail in conjunction with separator.
As shown in the figure, medium-speed pulverizer moving-stator blade of the present invention is in conjunction with separator, comprise the separator body 2 that is arranged on above coal-grinding chamber 1 and extend into the coal spout 3 in the middle part of coal-grinding chamber from separator body center, the top being separated body 3 is provided with the plural top discharge mouth 4 communicated with coal-grinding chamber, be provided with in separator body 2 and extend in the middle part of coal-grinding chamber and the leaf cage 5 be looped around outside coal spout, the power set that leaf cage can be driven to rotate also are provided with in separator body 2, be placed with outside leaf cage 5 and be looped around leaf cage periphery and the stator blade 6 vertically arranged, the outlet of stator blade 6 and leaf cage 5 upper end communicates with top discharge mouth 4.
Said power set comprise variable-frequency motor 7 and turbine worm reducer 8, variable-frequency motor and worm type of reduction gearing are connected together by shaft coupling, variable-frequency motor changes frequency by frequency converter thus changes rotating speed, coal spout is provided with the rotor 9 be looped around outside coal spout, the bottom of rotor 9 is fixedly connected with leaf cage 5, the upper end of rotor 9 is connected with driven pulley 10, the power output shaft of turbine worm reducer 8 is provided with drive pulley 11, driven pulley 10 and drive pulley 11 are provided with belt 12, the driven pulley linked together with rotor is driven thus by belt 12, make rotor turns, the direction of rotation of rotor for being down seen as clockwise above coal pulverizer, frequency converter is compared with mechanical speed change, and frequency converter is hardly with safeguarding, reliability is very high, rotor adopts wear-resisting alloy steel to make, unitary tapered structure, and projected life was more than 35000 hours, said leaf cage 5 of stating comprises the spaced moving vane of multi-disc, the lower end of moving vane has intilted angle, make the gap that diminishes gradually of opening from the bottom up of Formation cross-section shape between moving vane and stator blade, rotor 9 is arranged in a urceolus 13 by bearing, urceolus 13 is provided with gas sealing mechanism 14, urceolus 13 is provided with temperature measuring equipment 15.
Its operation principle is as follows:
Medium-speed pulverizer mair motor is rotated by reductor band movable grinding disc, hot blast enters in Vertical Mill body from air inlet simultaneously, material drops on the coal-grinding chamber of mill central authorities by charging aperture, under the influence of centrifugal force, material is from coal-grinding chamber evenly movement to edge of mill central authorities, and the grinding roller-way region on mill, is subject to rolling of grinding roller, bulk materials is directly crushed, and forms material bed and carry out intergranular pulverizing after fine is then squeezed, material after pulverizing continues to move to mill edge, until taken away by the air blast at vane place, by in the material that air-flow takes up, larger particles material drops to again on mill and continues to pulverize under self gravitation effect, rest materials then enters moving-stator blade of the present invention with air-flow and carries out particle classifying in conjunction with separator, dynamic, under the effect of stator blade, (separator rotor is placed in the inner side of powder-separating area, direction of rotation is consistent with the direction of tangential gas flow, for separator realizes selecting powder function to provide the centrifugal force of key, wherein, one that said powder-separating area is existence rotates the ring-shaped area, centrifugal force controlled ground produced by rotor, the pulverized coal particle of different-grain diameter in this is interval, because himself quality is different, the centrifugal force varied in size, centrifugal force orders about coal dust and leaves this region, outside motion, the centripetal force that simultaneously these coal dusts are also subject to First air air-flow makes it to central motion, when separator rotor rotating speed and the homogeneous timing of First air air-flow, be in the coal dust under a certain specified particle diameter in powder-separating area, remain static because suffered centrifugal force is equal with centripetal force, the separator of this particle diameter for this reason under condition selects powder Cut size, the coarse granule exceeding Cut size outwards moves under the influence of centrifugal force, to impinge upon on stator blade and sedimentation under gravity), the material not meeting fineness requirement comes back on mill and carries out grinding, and the material meeting fineness requirement to be entered through pipeline with air-flow and is left separator by the outlet device above separator, boiler combustion is entered through pulverized coal feed pipe.Be mixed into the difficult mill such as the iron block of material, gangue foreign material in main frame when moving to mill edge with material, can not be blown up because own wt is large, fall after the grinding machine cavity of resorption material scraping plate be installed in bottom mill scrapes slag-drip opening, it is outside to discharge main frame.
Pulverized coal particle distribution relation
Because the dynamic and static blade arranged can realize the two-way regulating function of leaf cage rotational speed regulation and (stator blade has deflector baffle) static deflector baffle angular adjustment, coal dust can be made in Gravity Separation, clash into and be separated, be folded under inertial separation and centrifugal force forces to be separated etc. and act on, decline in mill Inner eycle multiplying power, improve fineness of pulverized coal and uniformity index, finally reach raising boiler combustion efficiency, reduce the object of unburned carbon in flue dust.
Separator dynamic blade is driven by variable-frequency motor, and this just makes blade rotational speed can regulate in the scope required, the rotating speed of motor sets 4 ~ 20mA signal by DCS and controls; Dynamic separator can by the requirement regulating the rotating speed of separator to meet Coal rank, when the differential pressure of grinding machine reduces time, thinner product can being obtained by the rotating speed improving separator, thicker product can be obtained when reducing the rotating speed of separator on the contrary.
Motor speed and separator blade rotational speed relation see the following form:
Claims (5)
1. a medium-speed pulverizer moving-stator blade is in conjunction with separator, comprise be arranged on coal-grinding chamber (1) top separator body (2) and extend into the coal spout (3) in the middle part of coal-grinding chamber from separator body center, the top of described separation body (3) is provided with the plural top discharge mouth (4) communicated with coal-grinding chamber, it is characterized in that: be provided with in described separator body (2) and extend in the middle part of coal-grinding chamber and the leaf cage (5) be looped around outside coal spout, the power set that leaf cage can be driven to rotate also are provided with in described separator body (2), be placed with outside described leaf cage (5) and be looped around leaf cage periphery and the stator blade (6) vertically arranged, the outlet of described stator blade (6) and leaf cage (5) upper end communicates with top discharge mouth (4).
2. according to medium-speed pulverizer moving-stator blade according to claim 1 in conjunction with separator, it is characterized in that: described power set comprise variable-frequency motor (7) and turbine worm reducer (8), described coal spout is provided with the rotor (9) be looped around outside coal spout, the bottom of described rotor (9) is fixedly connected with leaf cage (5), the upper end of described rotor (9) is connected with driven pulley (10), the power output shaft of described turbine worm reducer (8) is provided with drive pulley (11), driven pulley (10) and drive pulley (11) are provided with belt (12).
3. according to medium-speed pulverizer moving-stator blade according to claim 1 in conjunction with separator, it is characterized in that: described leaf cage (5) comprises the spaced moving vane of multi-disc, the lower end of moving vane has intilted angle, forms the interface shape gap that diminishes gradually of opening from the bottom up between moving vane and stator blade.
4. according to medium-speed pulverizer moving-stator blade according to claim 2 in conjunction with separator, it is characterized in that: described rotor (9) is arranged in a urceolus (13) by bearing, described urceolus (13) is provided with gas sealing mechanism (14).
5. according to medium-speed pulverizer moving-stator blade according to claim 2 in conjunction with separator, it is characterized in that: described urceolus (13) is provided with temperature measuring equipment (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633415.2A CN104368433A (en) | 2014-11-11 | 2014-11-11 | Integrated separator applied to fixed vane and movable vane of intermediate-speed coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410633415.2A CN104368433A (en) | 2014-11-11 | 2014-11-11 | Integrated separator applied to fixed vane and movable vane of intermediate-speed coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104368433A true CN104368433A (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410633415.2A Pending CN104368433A (en) | 2014-11-11 | 2014-11-11 | Integrated separator applied to fixed vane and movable vane of intermediate-speed coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104368433A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111610043A (en) * | 2020-04-24 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | A method for evaluating the separation effect of the coarse powder separator during the grinding of mixed coal |
| CN119016153A (en) * | 2024-10-29 | 2024-11-26 | 山东白石新材料股份有限公司 | A nano-activated calcium carbonate crushing and screening device |
| CN120861252A (en) * | 2025-09-26 | 2025-10-31 | 济南安地冶金机械设备有限公司 | Center-feeding dynamic mill separator |
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| US20040084556A1 (en) * | 2002-11-04 | 2004-05-06 | Alstom (Switzerland) Ltd | Hybrid turbine classifier |
| CN101380631A (en) * | 2007-09-04 | 2009-03-11 | 上海重型机器厂有限公司 | Separator for coal mill |
| CN202387543U (en) * | 2011-12-26 | 2012-08-22 | 宜兴市中湖节能材料工程有限公司 | Coal mill separator |
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN202962872U (en) * | 2012-11-30 | 2013-06-05 | 黄立娜 | Device for milling and dynamically sorting recovered powder by means of classification at high efficiency for intermediate-speed coal mill |
| CN204208656U (en) * | 2014-11-11 | 2015-03-18 | 江苏中能电力设备有限公司 | Medium-speed pulverizer moving-stator blade is in conjunction with separator |
-
2014
- 2014-11-11 CN CN201410633415.2A patent/CN104368433A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040084556A1 (en) * | 2002-11-04 | 2004-05-06 | Alstom (Switzerland) Ltd | Hybrid turbine classifier |
| CN101380631A (en) * | 2007-09-04 | 2009-03-11 | 上海重型机器厂有限公司 | Separator for coal mill |
| CN202387543U (en) * | 2011-12-26 | 2012-08-22 | 宜兴市中湖节能材料工程有限公司 | Coal mill separator |
| CN102941141A (en) * | 2012-11-28 | 2013-02-27 | 北京电力设备总厂 | Roller ring mill |
| CN202962872U (en) * | 2012-11-30 | 2013-06-05 | 黄立娜 | Device for milling and dynamically sorting recovered powder by means of classification at high efficiency for intermediate-speed coal mill |
| CN204208656U (en) * | 2014-11-11 | 2015-03-18 | 江苏中能电力设备有限公司 | Medium-speed pulverizer moving-stator blade is in conjunction with separator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111610043A (en) * | 2020-04-24 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | A method for evaluating the separation effect of the coarse powder separator during the grinding of mixed coal |
| CN119016153A (en) * | 2024-10-29 | 2024-11-26 | 山东白石新材料股份有限公司 | A nano-activated calcium carbonate crushing and screening device |
| CN119016153B (en) * | 2024-10-29 | 2025-01-03 | 山东白石新材料股份有限公司 | Nanometer activated calcium carbonate crushing and screening device |
| CN120861252A (en) * | 2025-09-26 | 2025-10-31 | 济南安地冶金机械设备有限公司 | Center-feeding dynamic mill separator |
| CN120861252B (en) * | 2025-09-26 | 2025-12-09 | 济南安地冶金机械设备有限公司 | Center-feeding dynamic mill separator |
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