CN108568334A - A kind of flow fieldoptimization device improving pulverizer capacity - Google Patents
A kind of flow fieldoptimization device improving pulverizer capacity Download PDFInfo
- Publication number
- CN108568334A CN108568334A CN201810672038.1A CN201810672038A CN108568334A CN 108568334 A CN108568334 A CN 108568334A CN 201810672038 A CN201810672038 A CN 201810672038A CN 108568334 A CN108568334 A CN 108568334A
- Authority
- CN
- China
- Prior art keywords
- mill
- coal
- pulverizer
- sweeping wind
- mentioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003245 coal Substances 0.000 claims abstract description 69
- 238000010408 sweeping Methods 0.000 claims abstract description 26
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 9
- 241000883990 Flabellum Species 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 22
- 238000013461 design Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 8
- 239000003818 cinder Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 241001075561 Fioria Species 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- B02C23/26—Passing gas through crushing or disintegrating zone characterised by point of gas entry or exit or by gas flow path
Abstract
The present invention relates to a kind of flow fieldoptimization devices improving pulverizer capacity, including blast pipe and three guide ducts；The air inlet of blast pipe stretches out outside coal pulverizer, and external gas source；There are three the grinding rollers being circumferentially evenly spaced on along mill, the coal spout of coal pulverizer to be located above the middle part of mill for tool inside coal pulverizer；Three guide ducts respectively circumferentially uniformly and interval the outside for being vertically arranged in the top of mill edge, and being located between two neighboring grinding roller, the upper end of guide duct is connected to and in communication with blast pipe respectively；The center that the lower end of each guide duct is all provided with oriented mill tilts down the sweeping wind pipe of extension, and the lower part of sweeping wind pipe is provided along its length multiple exhaust vents for being respectively facing mill blowing；The upper end of the one end of sweeping wind pipe far from guide duct is connected to and in communication with equipped with the nozzle to up-draught.Advantage：Structure design is simple, reasonable, and energy is timely, efficiently separates the coal dust and raw coal of milled, improves the output of coal pulverizer.
Description
Technical field
The present invention relates to coal-grinding machine equipment, more particularly to a kind of flow fieldoptimization device improving pulverizer capacity.
Background technology
When grinding coal dust, raw coal is fallen to by coal spout on the mill of coal pulverizer coal pulverizer, mill through rotation and by
The dynamic grinding roller crush and grind rolled is at powder, and in grinding process, coal dust and raw coal coal cinder is moderate mixes, there is
The coal dust of milled ground repeatedly the phenomenon that, be greatly lowered the output of coal pulverizer in this way, reduce the work of coal pulverizer
Efficiency, while the effect that grinds of coal cinder is also affected, energy consumption is also larger.
Invention content
Technical problem to be solved by the invention is to provide a kind of flow fieldoptimization devices improving pulverizer capacity, effectively
Overcome the defect of the prior art.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of flow fieldoptimization dress improving pulverizer capacity
It sets, including blast pipe and three guide ducts；
Above-mentioned blast pipe is arranged in the top of the mill of coal pulverizer, and its air inlet stretches out outside above-mentioned coal pulverizer, and external
Air source；
There are three the mills for being circumferentially evenly spaced on along above-mentioned mill and being in rolling contact with mill top for tool inside coal pulverizer
The coal spout of roller, coal pulverizer is located above the middle part of above-mentioned mill；
Three above-mentioned guide ducts respectively circumferentially uniformly and interval the top for being vertically arranged in above-mentioned mill edge, and
It is located at the outside between two neighboring above-mentioned grinding roller, the upper end of above-mentioned guide duct connect and connects with above-mentioned blast pipe respectively
It is logical；
The lower end of each above-mentioned guide duct is equipped with the sweeping wind pipe that extension is tilted down to the center of above-mentioned mill, above-mentioned
The lower part of sweeping wind pipe is provided along its length multiple exhaust vents for being respectively facing above-mentioned mill blowing；
The upper end of the one end of above-mentioned sweeping wind pipe far from above-mentioned guide duct is connected to and in communication with equipped with the nozzle to up-draught.
The beneficial effects of the invention are as follows：Structure design is simple, reasonable, can coal dust and original timely, that efficiently separate milled
Coal improves the output of coal pulverizer.
Based on the above technical solution, the present invention can also be improved as follows.
Further, above-mentioned blast pipe is ring pipe, and ring is located at outside the coal breakage bucket of coal pulverizer, is connected to and in communication with sets thereon
There are connecting tube, the one end of above-mentioned connecting tube far from above-mentioned blast pipe to constitute the air inlet of above-mentioned blast pipe.
Advantageous effect using above-mentioned further scheme is that the design of blast pipe facilitates the connection of three guide ducts and its, cloth
Office is more reasonable.
Further, the lower part of every above-mentioned sweeping wind pipe is provided along its length the above-mentioned of the interlaced setting of two row
Exhaust vent.
Advantageous effect using above-mentioned further scheme is that exhaust vent is rationally distributed, and blowing range is big, it can be ensured that mill
The ground coal dust of roller raises, so that coal dust is effectively detached with coal cinder.
Further, angle is formed between the axial line of every above-mentioned guide duct and the axial line of corresponding above-mentioned sweeping wind pipe
α, 120 °≤α≤140 °, the center line of above-mentioned exhaust vent and the axis of above-mentioned sweeping wind pipe are mutually perpendicular to.
Advantageous effect using above-mentioned further scheme is that sweeping wind pipe is obliquely installed so that multiple exhaust vent blowing sides
To blowing to mill from inside to outside from top to bottom, so that the coal dust on mill can be detached effectively with coal cinder, and and coal-grinding
The swirling eddy of pulverized coal conveying effectively converges in machine.
Further, the height between the lower end nozzle and above-mentioned mill of above-mentioned coal spout less than above-mentioned grinding roller center with it is above-mentioned
Height between mill.
Advantageous effect using above-mentioned further scheme be coal spout position extend it is more reasonable, shorten coal spout nozzle with
Distance between mill ensures that raw coal drops down onto on mill in time, will not again be flown by swirling eddy drive before dropping down onto on mill
It raises.
Further, said nozzle upper end end is equipped with air outlet, and internal middle part is rotatable horizontal equipped with flabellum.
Advantageous effect using above-mentioned further scheme, which is the linear air-flow that the design of flabellum can spray nozzle, to be become
Eddy flow makes its even flow field to disturb the flow field above mill, convenient for blow above mill the coal dust raised can smoothly with
Swirling eddy in coal pulverizer converges, it is ensured that effective output of coal dust.
Further, said nozzle upper end end is circle, and above-mentioned air outlet includes multiple sub- air outlets, and multiple above-mentioned sons go out
Air port is fan annular, and the upper end end face for being distributed in said nozzle being circumferentially equidistantly spaced.
Advantageous effect using above-mentioned further scheme is air outlet reasonable design, is conducive to nozzle and sprays eddy flow.
Description of the drawings
Fig. 1 is the structural schematic diagram of the flow fieldoptimization device of the raising pulverizer capacity of the present invention；
Fig. 2 be the present invention raising pulverizer capacity flow fieldoptimization device in sweeping wind pipe structure side diagram；
Fig. 3 be the present invention raising pulverizer capacity flow fieldoptimization device in sweeping wind pipe structure upward view；
Fig. 4 be the present invention raising pulverizer capacity flow fieldoptimization device in guide duct distribution map；
Fig. 5 be the present invention raising pulverizer capacity flow fieldoptimization device in nozzle structural schematic diagram；
Fig. 6 illustrates for the air outlet distributed architecture of nozzle in the flow fieldoptimization device of the raising pulverizer capacity of the present invention
Figure.
In attached drawing, parts list represented by the reference numerals are as follows：
1, blast pipe, 2, guide duct, 3, mill, 4, grinding roller, 5, coal spout, 11, connecting tube, 21, sweeping wind pipe, 22, spray
Mouth, 221, flabellum, 223, sub- air outlet.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment：As shown in Figures 1 to 4, the flow fieldoptimization device of the raising pulverizer capacity of the present embodiment includes blast pipe 1
With three guide ducts 2；
Above-mentioned blast pipe 1 is arranged in the top of the mill 3 of coal pulverizer, and its air inlet stretches out outside above-mentioned coal pulverizer, and outer
Connect air source；
There are three be evenly spaced on and be in rolling contact with 3 top of mill along above-mentioned mill 3 is circumferential for tool inside coal pulverizer
The coal spout 5 of grinding roller 4, coal pulverizer is located above the middle part of above-mentioned mill 3；
Three above-mentioned guide ducts 2 respectively circumferentially uniformly and interval the top for being vertically arranged in 3 edge of above-mentioned mill,
And it is located at the outside between two neighboring above-mentioned grinding roller 4, the upper end of above-mentioned guide duct 2 is connect with above-mentioned blast pipe 1 respectively
And it is connected to；
The lower end of each above-mentioned guide duct 2 is equipped with the sweeping wind pipe 21 that extension is tilted down to the center of above-mentioned mill 3,
The lower part of above-mentioned sweeping wind pipe 21 is provided along its length multiple exhaust vents for being respectively facing the blowing of above-mentioned mill 3；
The upper end of the one end of above-mentioned sweeping wind pipe 21 far from above-mentioned guide duct 2 is connected to and in communication with equipped with the nozzle to up-draught
22。
In coal pulverizer process of lapping, raw coal (coal cinder) is fallen to through coal spout 5 on mill 3, with the rotation of mill 3,
It pulverizes between mill 3 and the grinding roller of passive rotation 4, synchronous, extraneous air source branches to three guide ducts 2 through blast pipe 1
It is interior, most blow to mill 3 through each sweeping wind pipe 21 afterwards, the coal dust on mill 3 blown and is raised, and with 3 surrounding pulverized coal conveying of mill
Eddy flow converge after to next stage convey, meanwhile, nozzle 22 can effectively be dried coal breakage, and blow and raise on its mill 3
The coal dust mixed in square gas makes it be uniformly distributed on the top of mill 3, and as blowing for coal dust raises flowing finally and coal pulverizer
The swirling eddy of internal 3 surrounding of mill converges, and coal dust is thoroughly delivered to next link, and entire technical solution uses three
Guide duct 2 is uniformly distributed so that blowing to raise and there's almost no dead angle to coal dust on mill 3, it is very convenient, and effectively improve
Coal dust is ground repeatedly in coal pulverizer process of lapping, takes time and effort the situation for leading to pulverizer capacity difference so that coal pulverizer is ground
Efficient, energy consumption substantially reduces.
Preferably, above-mentioned blast pipe 1 is ring pipe, and ring is located at outside the coal breakage bucket 6 of coal pulverizer, is connected to and in communication with thereon
Equipped with connecting tube 11, the one end of above-mentioned connecting tube 11 far from above-mentioned blast pipe 1 constitutes the air inlet of above-mentioned blast pipe 1, blast pipe 1
Loop design be conducive to three guide ducts 2 arrangement and connection, overall construction design it is reasonable, compact.
Preferably, the lower part of every above-mentioned sweeping wind pipe 21 is provided along its length the upper of the interlaced setting of two row
Exhaust vent is stated, exhaust vent connection and reasonable arrangement keeps its purging range uniform, and overlay area area is big, (blows the purging of coal dust
Raise) effect is preferable.
Preferably, being formed between the axial line of every above-mentioned guide duct 2 and the axial line of corresponding above-mentioned sweeping wind pipe 21
Angle α, 120 °≤α≤140 °, the center line of above-mentioned exhaust vent and the axis of above-mentioned sweeping wind pipe are mutually perpendicular to, which makes
It can be tilted from top to bottom from inside to outside and blow to mill 3, so that coal ground on mill by the air-flow of exhaust vent blowout
The surrounding that mill 3 largely can timely and effectively occur in powder is converged in coal pulverizer to the swirling eddy of pulverized coal conveying, remaining
Under small part also region mill 3 above can upwards be raised under the airflow influence that exhaust vent is blown out, realize coal dust and
Coal cinder efficiently separates, and finally converges with the swirling eddy in coal pulverizer and is delivered to next link.
Preferably, height between the lower end nozzle and above-mentioned mill 3 of above-mentioned coal spout 5 less than 4 center of above-mentioned grinding roller with
Height between above-mentioned mill 3, which makes the lower end nozzle of coal spout 5 to greatest extent close to mill 3, effective to shorten
Coal spout 5 nozzle between mill 3 at a distance from, ensure that raw coal is dropped down onto in time on mill 3, will not before dropping down onto on mill 3 quilt
Swirling eddy drive in coal pulverizer is flown upward again.
As shown in figure 5,22 upper end end of said nozzle is equipped with air outlet, internal middle part is rotatable horizontal equipped with fan
Leaf 221, into nozzle 22 air-flow when being sprayed upwards by its air outlet, if the setting without flabellum 221, air-flow is generally in straight
Line style sprays upwards, only can blow the air-flow of 3 top of mill upwards, it is difficult to converge with the swirling eddy of 3 surrounding of mill,
That is the coal dust mixed in the air-flow of 3 top of mill is difficult as the swirling eddy in coal pulverizer transfers out, and flabellum 221
Design so that nozzle 22 before spraying air-flow can under the action of flabellum 221 by the air outlet of nozzle 22 ejection it is small-scale
Eddy flow is exactly the flow field for disturbing 3 top of entire mill so that should to the air agitation of the mixed coal powder to 3 top of mill
Coal dust distribution is relatively uniform in flow field, and is rotated in a manner of eddy flow or similar eddy flow, and this makes it possible to make 3 top of mill
It can finally be able to mix with the swirling eddy of 3 surrounding of mill with the coal dust mixed in it, so that coal dust can be effective
It is carried over.
In some embodiments, as shown in fig. 6,22 upper end end of said nozzle is circle, above-mentioned air outlet includes multiple
Sub- air outlet 223, multiple above-mentioned sub- air outlets 223 are fan annular, and what is be circumferentially equidistantly spaced is distributed in said nozzle
The design comparison of 22 upper end end face, multiple sub- air outlets 223 is reasonable, and more conducively nozzle 22 sprays air-flow with cyclonic form, more
Easily the flow field of 3 top of mill is disturbed.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of flow fieldoptimization device improving pulverizer capacity, it is characterised in that：Including blast pipe (1) and three guide ducts
(2)；
The blast pipe (1) is arranged in the top of the mill (3) of coal pulverizer, and its air inlet stretches out outside the coal pulverizer, and outer
Connect air source；
There are three be circumferentially evenly spaced on along the mill (3) and be in rolling contact with mill (3) top for tool inside coal pulverizer
The coal spout (5) of grinding roller (4), coal pulverizer is located above the middle part of the mill (3)；
Three guide ducts (2) respectively circumferentially uniformly and interval the top for being vertically arranged in the mill (3) edge,
And be located at the outside between the two neighboring grinding roller (4), the upper end of the guide duct (2) respectively with the blast pipe
(1) it is connected to and in communication with；
The center that the lower end of each guide duct (2) is all provided with the oriented mill (3) tilts down the sweeping wind pipe of extension
(21), the lower part of the sweeping wind pipe (21) is provided along its length multiple outlet air for being respectively facing the mill (3) blowing
Hole；
The upper end of the one end of the sweeping wind pipe (21) far from the guide duct (2) is connected to and in communication with equipped with the nozzle to up-draught
(22)。
2. a kind of flow fieldoptimization device improving pulverizer capacity according to claim 1, it is characterised in that：The air inlet
It is ring pipe to manage (1), and ring is located at coal breakage bucket (6) outside of coal pulverizer, is connected to and in communication with thereon equipped with connecting tube (11), described
The one end of connecting tube (11) far from the blast pipe (1) constitutes the air inlet of the blast pipe (1).
3. a kind of flow fieldoptimization device improving pulverizer capacity according to claim 1, it is characterised in that：Described in every
The lower part of sweeping wind pipe (21) is provided along its length the exhaust vent of the interlaced setting of two row.
4. a kind of flow fieldoptimization device improving pulverizer capacity according to claim 3, it is characterised in that：Described in every
Form angle α between the axial line of guide duct (2) and the axial line of the corresponding sweeping wind pipe (21), 120 °≤α≤140 °,
The center line of the exhaust vent and the axis of the sweeping wind pipe (21) are mutually perpendicular to.
5. a kind of flow fieldoptimization device improving pulverizer capacity according to claim 1, it is characterised in that：The coal breakage
The height managed between the lower end nozzle and the mill (3) of (5) is less than between the grinding roller (4) center and the mill (3)
Highly.
6. a kind of flow fieldoptimization device improving pulverizer capacity according to any one of claims 1 to 5, feature exist
In：Nozzle (22) the upper end end is equipped with air outlet, and internal middle part is rotatable horizontal equipped with flabellum (221).
7. a kind of flow fieldoptimization device improving pulverizer capacity according to claim 6, it is characterised in that：The nozzle
(22) upper end end is circle, and the air outlet includes multiple sub- air outlets (223), and multiple sub- air outlets (223) are
Fan annular, and the upper end end face for being distributed in the nozzle (22) being circumferentially equidistantly spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810672038.1A CN108568334A (en) | 2018-06-26 | 2018-06-26 | A kind of flow fieldoptimization device improving pulverizer capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810672038.1A CN108568334A (en) | 2018-06-26 | 2018-06-26 | A kind of flow fieldoptimization device improving pulverizer capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108568334A true CN108568334A (en) | 2018-09-25 |
Family
ID=63572224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810672038.1A Pending CN108568334A (en) | 2018-06-26 | 2018-06-26 | A kind of flow fieldoptimization device improving pulverizer capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108568334A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918197A (en) * | 2019-11-14 | 2020-03-27 | 山西大学 | Sand removing device for medium-speed coal mill |
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| US20100276525A1 (en) * | 2008-01-24 | 2010-11-04 | Mitsubishi Heavy Industries, Ltd. | Roller mill structure |
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| CN203972042U (en) * | 2014-07-25 | 2014-12-03 | 北京电力设备总厂 | A kind of two-way gap coal pulverizer nozzle ring |
| CN104588191A (en) * | 2015-01-13 | 2015-05-06 | 上海意丰机电科技开发有限公司 | Medium-speed abrasive flow field optimization method |
| CN208512676U (en) * | 2018-06-26 | 2019-02-19 | 北京华电润泽环保有限公司 | A kind of flow fieldoptimization device improving pulverizer capacity |
-
2018
- 2018-06-26 CN CN201810672038.1A patent/CN108568334A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2737463Y (en) * | 2004-06-08 | 2005-11-02 | 郭长岭 | Roller medium speed coal mill |
| CN2805925Y (en) * | 2005-04-28 | 2006-08-16 | 沈阳重型机械集团有限责任公司 | Large-sized vertical roll mill |
| US20100276525A1 (en) * | 2008-01-24 | 2010-11-04 | Mitsubishi Heavy Industries, Ltd. | Roller mill structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918197A (en) * | 2019-11-14 | 2020-03-27 | 山西大学 | Sand removing device for medium-speed coal mill |
| CN110918197B (en) * | 2019-11-14 | 2020-11-10 | 山西大学 | Sand removing device for medium-speed coal mill |
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