CN106378268A - Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill - Google Patents
Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill Download PDFInfo
- Publication number
- CN106378268A CN106378268A CN201611022655.4A CN201611022655A CN106378268A CN 106378268 A CN106378268 A CN 106378268A CN 201611022655 A CN201611022655 A CN 201611022655A CN 106378268 A CN106378268 A CN 106378268A
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- China
- Prior art keywords
- nozzle
- medium
- spraying nozzle
- speed vertical
- coal pulverizer
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
-
- 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
- B02C23/24—Passing gas through crushing or disintegrating zone
-
- 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
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/68—Arrangements for adjusting the position of spray heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to an adjustable rotary spraying nozzle structure for a high-efficiency wear-resistant low-resistant medium-speed vertical coal mill. The adjustable rotary spraying nozzle structure for the high-efficiency wear-resistant low-resistant medium-speed vertical coal mill comprises a coal mill spraying nozzle, a sealing structure and an adjusting structure; the sealing structure is positioned above the spraying nozzle; the adjusting structure is arranged between the spraying nozzle and the sealing structure; a horizontal sealing gap is formed between the adjusting structure and the spraying nozzle; an air channel is formed in the spraying nozzle; the adjusting structure stretches to or retracts from a spraying nozzle air channel outlet side through mechanical transmission; the spraying nozzle is of an overall structure; when the coal mill is operated, the overall spraying nozzle rotates and does not have dynamic and static friction. The baffle is arranged in the adjusting structure; radial movement of the spraying nozzle can be realized through the mechanical transmission, so that the purpose of changing the area of a spraying nozzle air channel outlet in real time is achieved. According to the adjustable rotary spraying nozzle structure for the high-efficiency wear-resistant low-resistant medium-speed vertical coal mill, the service life of the spraying nozzle and a wear-resistant piece of the coal mill can be prolonged; the adaptability to the change of working conditions of the coal mill can be improved; the weight of the spraying nozzle is reduced; the pressure difference of the coal mill is reduced; the air to powder ratio is reduced; the electricity consumption of the coal mill is reduced; the wear resistance of the spraying nozzle can be improved; the resistance can be reduced.
Description
Technical field
The present invention relates to mechanical field, particularly relate to a kind of thermal power plant medium-speed vertical coal pulverizer swivel nozzle structure.
Background technology
Coal pulverizer is coal fired power plant pulverized coal preparation system capital equipment.As shown in figure 1, domestic commonly used medium-speed vertical coal-grinding
Machine passes through milling, drying, the choosing of thickness dressing sieve and the supply boiler coal-ash fuel such as transports.This coal pulverizer groundwork process is：
The raw coal that need are ground is fallen mill from the coal spout being located at coal pulverizer central authorities, mill rotate under the driving of motor and by
In centrifugal force, raw coal is got rid of to milling on raceway；Then, milled by grinding roller.Work of milling is completed by three grinding rollers, mill
Roller provides grinding pressure by spring loads or hydraulic loaded.Milling and being dried of raw coal is carried out simultaneously, and it is uniform that First air passes through nozzle
Enter around mill, will dry and be delivered to coal pulverizer top through the coal dust intermixture tangentially throwing away from mill of milling
Carry out in separator separating, wherein, the coarse powder in coal dust intermixture is separated to drop back into and is refaced on mill, and qualified is thin
Powder is then taken out of separator by First air；And the heavier pebble coal being difficult to pulverize and a wind does not rise, pyrite, iron block etc. are logical
Cross nozzle and fall an air compartment, dreg discharging box is blown into by scraper plate, by artificial periodic cleaning.
Described nozzle is the vital part of medium-speed vertical coal pulverizer, has following important function：
A, in coal pulverizer coal dust is dried；
B, the fluidized state of maintenance coal dust, make coal dust flow to means of abrasion；
C, pulverized coal particle is transferred to separator from fluid bed, and oarse-grained coal dust separates back means of abrasion again；
D, ground pulverized coal particle is blowed to burner from separator.
At present, adopt open type sound to combine nozzle arrangements more in the thermal power plant.Rotating ring is connected with mill, with mill during operation
Rotate together, stationary ring is connected with medium-speed vertical coal-grinding barrel wall.Gap is set between dynamic and static ring.Its subject matter has：
Medium-speed vertical coal pulverizer is in operation, and has the impurity such as pebble coal to drop at nozzle, also has partial impurities and be stuck in
The gap location of dynamic and static ring, carries flue dust secretly and can it be caused to wash away, with the increase of run time, can lead to dynamic and static ring in First air
Abrasion increase, greatly reduce the service life of medium-speed vertical coal-grinding machine nozzle.In addition, after dynamic and static czermak space is continuously increased,
Medium-speed vertical coal-grinding machine nozzle weakens to the organizational capacity of First air, leads to the powder ability of taking of First air to substantially reduce, wind powder ratio
It is continuously increased, affect medium-speed vertical pulverizer capacity simultaneously.Wind powder can increase primary air fan power consumption than after increasing, simultaneously unfavorable
In realizing boiler lower NOx combustion.And after pulverizer capacity reduces, station service power consumption rate can be increased, increase net coal consumption rate.
The airway resistance of medium-speed vertical coal-grinding machine nozzle is higher.Medium-speed vertical coal-grinding machine nozzle air flue entrance is usually adopted at present
Use straight channel entry form, when First air enters coal-grinding machine nozzle air flue, drag losses is larger, air flue is to tilt straight channel simultaneously,
Air-flow accelerator completes in nozzle air flue porch completely, makes the drag losses of First air in whole nozzle air flue larger, enters
And coal pulverizer inlet outlet pressure differential is larger, increases primary air fan power consumption, also can limit coal pulverizer EIAJ.
Medium-speed vertical coal-grinding machine nozzle air flue flow area can not adapt to the change of coal and load etc. in good time.Work as coal pulverizer
During burning high-moisture coal, for ensureing drying capacity, need to increase heat primary air flow area, reduce flowing resistance.And when combustion
During with common coal, flow area necessarily can be throttled, improve nozzle air passage outlet wind speed, reduce wind powder ratio
Purpose.Thermal power plant does not have On-line Control coal-grinding machine nozzle air flue flow area technology at present.
Medium-speed vertical coal-grinding machine nozzle is poor to the screenability of pebble coal etc..Because nozzle air flue flow area is certain,
In the case that primary air flow is constant, nozzle air passage outlet wind speed is constant.Thermal power plant can only be controlled by adjusting primary air flow at present
Pebble coal amount processed.In addition, when coal varitation, because wind speed is non-adjustable, nozzle does not sieve coal cinder and impurity (stone, Huang Tie
Ore deposit etc.) ability.For the power plant using the more colm of impurity, impurity can not be discharged in time, repeatedly be ground in coal pulverizer
Mill, causes coal pulverizer serious wear, and power consumption raises, and nozzle life is shorter.Meanwhile, substantial amounts of grey matter, sulfur, weight are contained in pebble coal
Metal etc., it is impossible to screen in time, can increase pollutant load in flue gas.
At present, medium-speed vertical coal-grinding machine nozzle is commonly used forging type and is produced, mostly plain cast iron material, for increasing the nozzle longevity
Life, form is generally heavier, and quality is larger, and during operation, motor drives coal pulverizer mill to rotate together with nozzle, energy consumption of electrical machinery
Higher.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art and providing a kind of high-efficiency abrasion-proof lower resistance medium-speed vertical mill
Coal machine adjustable rotary nozzle arrangements, it is a kind of coal pulverizer nozzle arrangements form of optimization, adapts to the change of burning coal, load etc.
Change, nozzle antiwear property can be improved, reduce resistance, reduce mill differential pressure, reduce coal pulverizer energy consumption, reduce wind powder ratio.
The technical scheme is that：
A kind of medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements, including coal-grinding machine nozzle, sealing structure and adjustment structure,
It is characterized in that：Described sealing structure is located at the top of nozzle；Described adjustment structure setting nozzle and sealing structure it
Between, it forms a horizontal seal gap and nozzle between；It is provided with air flue in nozzle；Adjustment structure passes through machine driving to spray
Mouth air passage outlet side stretching motion；Nozzle is overall structure, nozzle integral-rotation during operation, no sound friction.
According to medium-speed vertical coal pulverizer ruuning situation, described nozzle air passage outlet flow area is more original design to reduce 5%
～40%.
Exert oneself for increasing, reduce the abrasion of medium-speed vertical coal-grinding barrel wall it is preferable that its nozzle air flue and horizontal direction simultaneously
Angle be 60 °～85 °.
Nozzle air flue entrance is horn curve entrance.
The angle of chamfer of nozzle air passage outlet is 15 °～60 ° with horizontal direction angle.
Tapered configuration is adopted inside nozzle air flue.
It is distorted shape inside nozzle air flue.
Nozzle material is using high-wear-resistant alloy material it is ensured that its Rockwell hardness HRC value is not less than 50.
Described adjustment structure can be carried out to nozzle flow area according to the change of medium-speed vertical coal pulverizer load etc. online
Adjustment.
For adapting to coal and equipment working condition change, improve medium-speed vertical coal pulverizer performance, nozzle air passage outlet flow area
0～40% can be reduced in real time in original basis.
For the power plant that ature of coal is poor, propose one kind and rotate forward nozzle arrangements, its nozzle air passage outlet and medium-speed vertical
Coal pulverizer direction of rotation is identical, is greatly improved the screening capacity of impurity in coal, improves the life-span of consumable accessory in coal pulverizer.
It is an advantage of the current invention that：The present invention can effectively solve the problem that medium-speed vertical pulverizer capacity deficiency, coal-grinding machine nozzle
Resistance is big, coal pulverizer inlet outlet pressure differential is big, wind powder is than high problem.The present invention can improve coal-grinding machine nozzle and other wearing pieces
In the life-span, it is possible to increase the adaptability to coal pulverizer working conditions change, reduce nozzle weight, reduce mill differential pressure, reduce wind powder ratio,
Reduce coal pulverizer power consumption, it is possible to increase nozzle antiwear property, reduce resistance.
Brief description
Fig. 1 is traditional medium-speed vertical coal pulverizer internal structure profile.
Fig. 2 is the sectional view of high-efficiency abrasion-proof lower resistance medium-speed vertical coal pulverizer adjustable nozzle structure of the present invention.
Label declaration in Fig. 2：
1st, nozzle；2nd, sealing structure；3rd, adjust structure；4th, horizontal seal gap；
5th, air flue direction；6th, nozzle air flue entrance；7th, nozzle air flue；8th, nozzle air passage outlet；
9th, baffle plate.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Fig. 2 medium-speed vertical coal pulverizer nozzle arrangements of the present invention, it includes：Nozzle 1, sealing structure 2, adjustment knot
Structure 3.Described sealing structure 2 is located at the top of nozzle 1；Described adjustment structure 3 is arranged between nozzle 1 and sealing structure 2,
It forms a horizontal seal gap 4 and nozzle 1 between；It is provided with nozzle air flue 7 in nozzle 1；Described nozzle 1 is overall knot
Structure, nozzle 1 integral-rotation during operation, no sound friction.
Wherein, described nozzle 1 is made up of 30～80 nozzle air flues 7；The more conventional spray of nozzle air flue 7 flow area
Mouth reduces about 5%-40%.Taking certain model medium-speed vertical coal pulverizer genuine nozzle domestic as a example, total face of its nozzle air passage outlet 8
Amass as 0.78m2, and the total flow area of nozzle air passage outlet 8 of the present invention is about in 0.55m2Left and right.Under identical primary air flow, can
Convey more coal dusts, reduce coal pulverizer wind powder ratio.Nozzle 1 combines Venturi effect and Bernoulli equation, sets up highly effective air
Aerodynamic field.
Preferably, air flue direction 5 and the horizontal direction angle of described nozzle 1 are 60 °～85 °, to reduce medium-speed vertical
Coal-grinding barrel wall is worn and torn, and the internal pulverized coal air of coal pulverizer can be made to be vortexed and do not paste barrel, can reduce its impact to barrel, increase cylinder
The wall wearing layer life-span.
The nozzle air flue entrance 6 of described nozzle 1 is set to trumpet-shaped inlet, to reduce nozzle air flue entry resistance；With
When nozzle air flue 7 be tapered air flue so that First air air-flow further smoothly transits to jet expansion 8, can reduce in nozzle
Flowing resistance is lost, and whole nozzle air flue is distorted shape, to reduce medium-speed vertical coal pulverizer inlet outlet pressure differential.
Nozzle air passage outlet 8 is tilting outlet, the angle of chamfer of nozzle air passage outlet 8 and horizontal plane angle be 15 °～
60 °, take powder ability to increase First air, the ventilation of medium-speed vertical coal pulverizer can be improved and exert oneself.
Described horizontal seal gap 4 is 7-10mm.Itself gap and sealing structure 2 between is 2-5mm simultaneously.Due to this
Nozzle 1 sealing structure that invention provides is horizontal seal, and this kind of sealing means increased the resistance that leaks out, under identical clearance condition,
First air amount of leakage can be made less, and can avoid herein being rushed by coal dust in medium-speed vertical coal pulverizer and other impurity again
Hit, it is protected, and effect property is higher it is ensured that sealing is permanently effective.
Described adjustment structure 3 can by machine driving to nozzle side stretch, can real-time adjustment nozzle air passage outlet 8 through-flow
Area reduces the 0～40% of original area.
It is provided with baffle plate 9 in described adjustment structure 3, the radial motion along nozzle 1 be can achieve by mechanical transmission structure,
Reach the real-time purpose changing nozzle air passage outlet 8 area.Described adjustment structure 3 can be according to medium-speed vertical coal pulverizer load phase
The change of pass factor carries out on-line tuning to nozzle flow area.By detect coal pulverizer performance data, can on-line tuning to
Good flow area is it is achieved that the adjustment of the online flow area of coal-grinding machine nozzle.
Poor for ature of coal, the more power plant of impurity in coal, using nozzle air passage outlet direction and medium-speed vertical coal pulverizer
The direction of rotation identical forward nozzle of mill, can increase the sieving capacity to pebble coal for the coal pulverizer, miscellaneous in exclusion coal ahead of time
Matter, reduces impurity and repeatedly grinds the coal pulverizer abrasion causing in coal pulverizer, reduce coal pulverizer power consumption, heavy metal, Huang Tie simultaneously
The exclusion of ore deposit etc., decreases the content of pollutant in boiler tail flue gas, improves the life-span of SCR catalyst.
The material of described nozzle 1 adopts high hardness alloy material, and wearability is good, and the life-span improves than current conventional nozzle
5000-15000 hour, protects efficiency high in its lifetime simultaneously.
All these design features make medium-speed vertical coal-grinding machine nozzle overall efficiency of the present invention greatly improve, and are boiler combustion
Provide qualified coal dust, relatively low First air and coal dust ratio, the efficiency of low oxygen combustion in boiler can be improved, reduce NOx's
Discharge.The discharge of the impurity such as pebble coal simultaneously, can reduce the heavy metal amount of boiler emission, reduce SO2, the generation of flue dust, reduce
Pollution to environment, also can improve the SCR catalyst life-span.Improve the effects of energy conservation and environmental protection of whole boiler of power plant side.
The above is highly preferred embodiment of the present invention, not in order to limit the present invention, all spirit in the present invention and former
Within then, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements, including coal-grinding machine nozzle, sealing structure and adjustment structure, its
It is characterised by：Described sealing structure is located at the top of nozzle；Described adjustment structure setting between nozzle and sealing structure,
It forms a horizontal seal gap and nozzle between；It is provided with air flue in nozzle；Adjustment structure passes through machine driving to nozzle
Air passage outlet side stretching motion；Nozzle is overall structure, nozzle integral-rotation during operation, no sound friction.
2. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described adjustment
It is provided with baffle plate in structure, the radial motion along nozzle be can achieve by mechanical transmission structure, reach the real-time nozzle air flue that changes and go out
The purpose of open area.
3. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
It is made up of 30～80 nozzle air flues；Described nozzle material adopts high-wear-resistant alloy material.
4. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air passage outlet flow area is more original design to reduce 5%～40%.
5. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air flue direction and horizontal direction angle be 60 °～85 °, to reduce the abrasion of medium-speed vertical coal-grinding barrel wall, can make in coal pulverizer
Portion's pulverized coal air is vortexed and does not paste barrel, can reduce its impact to barrel, increases the barrel wearing layer life-span.
6. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air flue entrance is set to flared curve entrance, to reduce nozzle air flue entry resistance.
7. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air flue is tapered air flue, so that First air air-flow further smoothly transits to jet expansion, can reduce the flowing resistance in nozzle
Loss, whole nozzle air flue is distorted shape, to reduce medium-speed vertical coal pulverizer inlet outlet pressure differential.
8. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air passage outlet exports for tilting, and the angle of chamfer of nozzle air passage outlet is 15 °～60 ° with horizontal plane angle, to increase First air
Take powder ability, the ventilation of medium-speed vertical coal pulverizer can be improved and exert oneself.
9. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described nozzle
Air passage outlet flow area can reduce 0～40% in real time in original basis, to adapt to coal and equipment working condition change, in improvement
Fast vertical spindle coal pulveriser performance.
10. medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements according to claim 1 it is characterised in that：Described tune
Whole structure, can carry out on-line tuning according to the change of medium-speed vertical coal pulverizer load correlative factor to nozzle flow area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611022655.4A CN106378268A (en) | 2016-11-17 | 2016-11-17 | Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611022655.4A CN106378268A (en) | 2016-11-17 | 2016-11-17 | Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106378268A true CN106378268A (en) | 2017-02-08 |
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ID=57959225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611022655.4A Pending CN106378268A (en) | 2016-11-17 | 2016-11-17 | Adjustable rotary spraying nozzle structure for high-efficiency wear-resistant low-resistant medium-speed vertical coal mill |
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| Country | Link |
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| CN (1) | CN106378268A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339655A (en) * | 2018-02-23 | 2018-07-31 | 北京蓝爱迪电力技术有限公司 | A kind of intermediate-speed coal mill rotating nozzle structure |
| CN113578466A (en) * | 2021-07-09 | 2021-11-02 | 湖北秦鸿新材料股份有限公司 | Dynamic and static ring structure of coal mill |
| CN114018201A (en) * | 2021-11-04 | 2022-02-08 | 河海大学 | Experimental device and method for measuring notch abrasion of impulse turbine |
| CN115090379A (en) * | 2022-06-01 | 2022-09-23 | 建投遵化热电有限责任公司 | Medium speed pulverizer air flue nozzle structure |
| CN115463736A (en) * | 2022-06-01 | 2022-12-13 | 浙江浙能兰溪发电有限责任公司 | Wing-shaped air ring of coal mill |
| CN115518761A (en) * | 2022-10-13 | 2022-12-27 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
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| CN102671740A (en) * | 2012-05-07 | 2012-09-19 | 章礼道 | Intelligent roller type medium speed coal mill |
| CN203342871U (en) * | 2013-04-26 | 2013-12-18 | 徐军 | Anti-abrasion structure for movable nozzle ring and stationary ring in medium-speed coal mill |
| CN103537339A (en) * | 2013-11-12 | 2014-01-29 | 章礼道 | Intelligent medium-speed coal mill |
| CN206253243U (en) * | 2016-11-17 | 2017-06-16 | 北京蓝爱迪电力技术有限公司 | A kind of high-efficiency abrasion-proof lower resistance medium-speed vertical coal pulverizer adjustable rotary nozzle arrangements |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102671740A (en) * | 2012-05-07 | 2012-09-19 | 章礼道 | Intelligent roller type medium speed coal mill |
| CN203342871U (en) * | 2013-04-26 | 2013-12-18 | 徐军 | Anti-abrasion structure for movable nozzle ring and stationary ring in medium-speed coal mill |
| CN103537339A (en) * | 2013-11-12 | 2014-01-29 | 章礼道 | Intelligent medium-speed coal mill |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339655A (en) * | 2018-02-23 | 2018-07-31 | 北京蓝爱迪电力技术有限公司 | A kind of intermediate-speed coal mill rotating nozzle structure |
| CN108339655B (en) * | 2018-02-23 | 2023-06-30 | 北京蓝爱迪电力技术有限公司 | Rotary nozzle structure of medium-speed coal mill |
| CN113578466A (en) * | 2021-07-09 | 2021-11-02 | 湖北秦鸿新材料股份有限公司 | Dynamic and static ring structure of coal mill |
| CN114018201A (en) * | 2021-11-04 | 2022-02-08 | 河海大学 | Experimental device and method for measuring notch abrasion of impulse turbine |
| CN115090379A (en) * | 2022-06-01 | 2022-09-23 | 建投遵化热电有限责任公司 | Medium speed pulverizer air flue nozzle structure |
| CN115463736A (en) * | 2022-06-01 | 2022-12-13 | 浙江浙能兰溪发电有限责任公司 | Wing-shaped air ring of coal mill |
| CN115518761A (en) * | 2022-10-13 | 2022-12-27 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
| CN115518761B (en) * | 2022-10-13 | 2024-04-16 | 北京蓝爱迪电力技术有限公司 | Dynamic rotary separator of coal mill |
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Application publication date: 20170208 |