CN205731448U - Raymond bowl mill - Google Patents
Raymond bowl mill Download PDFInfo
- Publication number
- CN205731448U CN205731448U CN201620738873.7U CN201620738873U CN205731448U CN 205731448 U CN205731448 U CN 205731448U CN 201620738873 U CN201620738873 U CN 201620738873U CN 205731448 U CN205731448 U CN 205731448U
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- China
- Prior art keywords
- impeller
- girth sheets
- coal
- dividing plate
- raymond
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- 230000001681 protective effect Effects 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000003245 coal Substances 0.000 abstract description 31
- 238000005299 abrasion Methods 0.000 description 11
- 239000002817 coal dust Substances 0.000 description 8
- 239000004575 stone Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
This utility model relates to field of thermal power, disclose a kind of Raymond bowl mill, this Raymond bowl mill includes the impeller unit that coal-grinding bowl and the outer rim around this coal-grinding bowl are arranged, this impeller unit includes girth sheets in impeller, impeller outer girth sheets and guide vane between girth sheets and impeller outer girth sheets in being arranged on this impeller, in described impeller, girth sheets is fixing with the outer rim of described coal-grinding bowl is connected, in described impeller, the surface towards outside of girth sheets has the flange corresponding with the top of described guide vane, in described impeller, the part being positioned on described flange on the surface towards outside of girth sheets and the part being positioned under described flange are respectively the inclined-plane tilted towards inner side；The inner side of described impeller outer girth sheets connects dividing plate, the top of this dividing plate and the hanging of described guide vane, and the surface towards inner side of described dividing plate is the inclined-plane tilted towards outside, and Raymond bowl mill of the present utility model can effectively reduce the discharge capacity of pebble coal.
Description
Technical field
This utility model relates to field of thermal power, in particular it relates to a kind of Raymond bowl mill.
Background technology
At present, in thermal power plant, generally use medium-speed pulverizer that raw coal is worn into coal dust, send the most again in the burner hearth of boiler
Carry out combustion power generation.
The grinding component of medium-speed pulverizer all includes actively means of abrasion and driven means of abrasion two parts composition.Raw coal enters mill
Drop down onto on active means of abrasion after coal machine, to peripolesis under the effect of active means of abrasion rotary centrifugal force, enter and grind
Region contacts with driven means of abrasion and transmits power, and driven means of abrasion starts to rotate, with active means of abrasion instrument by former
Coal grinding becomes powder.
By the rotation of active means of abrasion, grind the coal dust obtained and be thrown to grind the vane room of bowl periphery, flow through vane
These coal dusts are taken to the coal dust classifier on medium-speed pulverizer top by the hot-air of room, and thinner coal dust is sent to hearth combustion, the most slightly
Coal dust then separated and re-grind.
In the process, hot blast is accompanied by being dried coal dust.During coal-grinding, it is thrown to vane room simultaneously
Also having stone, metal derby and a small amount of coal grain etc. carried secretly in raw coal, these are collectively referred to as pebble coal.Pebble coal is ground with active
The synchronized rotation of part scraper plate scrape into slag case.Find, possibly together with a lot of coal grains in pebble coal when clearing up the pebble coal in slag case.
These coal grains are not used, thus cause the waste of resource.Coal pulverizer pebble coal bed drain purge the most also increases operations staff's
Workload, the operation of ash gate simultaneously the most frequently increases and causes ash gate abrasion to increase, if the greatly discharge of pebble coal amount is not in time
Pebble coal can be made to be deposited in First air chamber interior for a long time, cause screeding device overload wear extent to increase the defect such as fracture, one
Part pebble coal is thrown at an air channel cause dieseling, needs to carry out labor cleaning.
Therefore, the discharge capacity how reducing pebble coal becomes the technical problem that this area is urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of Raymond bowl mill, and in this Raymond bowl mill, stone coal discharge amount is relatively low.
To achieve these goals, this utility model provides a kind of Raymond bowl mill, and this Raymond bowl mill includes coal-grinding bowl
The impeller unit arranged with the outer rim around this coal-grinding bowl, this impeller unit includes girth sheets in impeller, impeller outer girth sheets and setting
Guide vane between girth sheets and impeller outer girth sheets in this impeller, in described impeller, girth sheets is fixed with the outer rim of described coal-grinding bowl
Connecting, in described impeller, the surface towards outside of girth sheets has the flange corresponding with the top of described guide vane, described leaf
In wheel, the part being positioned on described flange and the part being positioned under described flange on the surface towards outside of girth sheets are respectively court
Inwardly roll oblique inclined-plane；The inner side of described impeller outer girth sheets connects dividing plate, the top of this dividing plate and described guide vane
Hanging, and the surface towards inner side of described dividing plate be towards outside tilt inclined-plane.
Preferably, the part being positioned on described flange on the surface towards outside of girth sheets and be positioned at described in described impeller
It is respectively arranged with protective plate in part under flange.
Preferably, described protective plate is antifriction alloy plate, and described antifriction alloy plate is welded in girth sheets in described impeller.
Preferably, the top of described dividing plate is coated with protective cover plate.
Preferably, along the outer rim of described coal-grinding bowl, in described impeller, girth sheets and described dividing plate include multiple arc respectively
Section.
Preferably, in described impeller, distance at spacing minimum between girth sheets and described dividing plate is 44～46mm.
Preferably, in described impeller, girth sheets is removably attachable to described coal-grinding bowl, and described dividing plate is removably attachable to
Described impeller outer girth sheets.
In Raymond bowl mill of the present utility model, by impeller outer girth sheets is designed as having concrete shape, and add
If dividing plate, the surface towards outside of girth sheets in impeller is specifically made to have the flange corresponding with the top of guide vane, impeller
The part being positioned on flange on the surface towards outside of interior girth sheets and the part being positioned under flange are respectively and tilt towards inner side
Inclined-plane, and to make the surface towards inner side of dividing plate be the inclined-plane tilted towards outside, therefore, it can so that impeller unit
Through flow hole there is fairshaped substantially nozzle type shape, so can make First air more glibly by described through flow hole, from
And reduce gas-flow resistance, reduce stone coal discharge amount.
Other features and advantages of the utility model will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, with following
Detailed description of the invention be used for explaining this utility model together, but be not intended that restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the partial sectional view radially intercepted according to Raymond bowl mill of the present utility model.
Description of reference numerals
1 coal-grinding bowl 2 impeller unit
Girth sheets 4 impeller outer girth sheets in 3 impellers
5 dividing plate 6 protective cover plates
7 guide vane 8 flanges
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It should be appreciated that herein
Described detailed description of the invention is merely to illustrate and explains this utility model, is not limited to this utility model.
In this utility model, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower " typically refers to figure
" up and down " orientation in 1；" outside " refers to the direction in the outside towards coal-grinding bowl, i.e. Fig. 1 towards right side；" inner side " refers to towards mill
Towards the direction in left side in the inner side of coal bowl, i.e. Fig. 1.
This utility model provides a kind of Raymond bowl mill, and this Raymond bowl mill includes coal-grinding bowl 1 and around this coal-grinding bowl 1
The impeller unit 2 that arranges of outer rim, this impeller unit 2 includes in impeller girth sheets 3, impeller outer girth sheets 4 and is arranged in this impeller
Guide vane 7 between girth sheets 3 and impeller outer girth sheets 4, in described impeller, girth sheets 3 is fixing with the outer rim of described coal-grinding bowl 1 is connected,
In described impeller, the surface towards outside of girth sheets 3 has the flange 8 corresponding with the top of described guide vane 7, described impeller
The part being positioned on described flange 8 on the surface towards outside of interior girth sheets 3 and the part being positioned under described flange 8 are respectively court
Inwardly roll oblique inclined-plane；The inner side of described impeller outer girth sheets 4 connects dividing plate 5, the top of this dividing plate 5 and described guide vane
The hanging of 7, and the surface towards inner side of described dividing plate 5 be towards outside tilt inclined-plane.
In Raymond bowl mill of the present utility model, by impeller outer girth sheets 4 is designed as having concrete shape, and add
If dividing plate 5, the surface towards outside of girth sheets 3 in impeller is specifically made to have the flange 8 corresponding with the top of guide vane 7,
In impeller the part being positioned on flange 8 on the surface towards outside of girth sheets 3 and the part that is positioned under flange 8 be respectively towards
Roll oblique inclined-plane, and to make the surface towards inner side of dividing plate 5 be the inclined-plane tilted towards outside, see Fig. 1, therefore,
So that the through flow hole of impeller unit 2 has fairshaped substantially nozzle type shape, so First air can be made more glibly
By described through flow hole, thus reduce gas-flow resistance, reduce stone coal discharge amount.
After stone coal discharge amount reduces, mean that the coal dust amount passed through from described through flow hole increases, it is thus preferred that
The part being positioned on described flange 8 on the surface towards outside of girth sheets 3 and the part being positioned under described flange 8 in described impeller
On be respectively arranged with protective plate, this protective plate can preferably select antifriction alloy plate, resists the abrasion of coal dust, thus to impeller
Interior girth sheets 3 plays protective action, extends the service life of Raymond bowl mill, and described antifriction alloy plate is preferably welded to described impeller
Interior girth sheets 3, so that girth sheets 3 forms smooth surface in impeller.
Based on identical reason, it is preferable that the top of described dividing plate 5 is coated with protective cover plate 6, in like manner, described protective cover
Plate 6 can select anti abrasive alloy sheets to be welded on the top of dividing plate 5.
Further, due to the shape facility of coal-grinding bowl 1, the manufacture processing of girth sheets 3 and dividing plate 5 in impeller for convenience, and
Connection with coal-grinding bowl 1, it is preferable that along the outer rim of described coal-grinding bowl 1, in described impeller, girth sheets 3 and described dividing plate 5 include respectively
Multiple arc subsegments, the concrete quantity of arc subsegment can be determined according to practical situation.
Preferably, in described impeller, girth sheets 3 is removably attachable to described coal-grinding bowl 1, and described dividing plate 5 is detachably connected
In described impeller outer girth sheets 4, such as, it is bolted, as such, it is possible to change girth sheets in the impeller that abrasion is more serious easily
3 and dividing plate 5, extend the service life of Raymond bowl mill.
Furthermore it is preferred that in described impeller distance at spacing minimum between girth sheets 3 and described dividing plate 5 be 44～
46mm, the most described flange 8 is 44～46mm apart from the distance located relative with described flange 8 of described dividing plate 5, suitably reduces institute
State in impeller the distance at the spacing minimum between girth sheets 3 and described dividing plate 5, so that the size of described through flow hole reduces,
Thus effectively reduce passing through of pebble coal, reduce the discharge capacity of pebble coal.Above-mentioned distance is applicable to the air quantity operating mode at 100t/h
Lower wind speed is the situation of about 66m/s, the discharge capacity of pebble coal can be reduced to ideal value.
According to the embodiment shown in Fig. 1, after transformation, pebble coal discharge capacity significantly reduces, and bed drain purge is 20% before transforming,
Preferably solve the big problem of energy loss that former pebble coal discharge capacity causes greatly, the most preferably solve because of pebble coal meanwhile
Discharge capacity is big and causes equipment attrition, accumulated slag spontaneous combustion, scraper plate fracture and the big problem of manpower consumption amount.
Preferred implementation of the present utility model is described in detail above in association with accompanying drawing, but, this utility model does not limit
Detail in above-mentioned embodiment, in technology concept of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, this utility model is to respectively
Plant possible compound mode to illustrate the most separately.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carrying on the back thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (7)
1. a Raymond bowl mill, this Raymond bowl mill includes the leaf that coal-grinding bowl (1) and the outer rim around this coal-grinding bowl (1) are arranged
Wheel apparatus (2), this impeller unit (2) include in impeller girth sheets (3), impeller outer girth sheets (4) and be arranged on this impeller in girth sheets (3)
And the guide vane (7) between impeller outer girth sheets (4), in described impeller, girth sheets (3) is fixing with the outer rim of described coal-grinding bowl (1) connects
Connect, it is characterised in that in described impeller, the surface towards outside of girth sheets (3) has and the top pair of described guide vane (7)
The flange (8) answered, the part being positioned on described flange (8) on the surface towards outside of girth sheets (3) and being positioned in described impeller
Part under described flange (8) is respectively the inclined-plane tilted towards inner side；The inner side of described impeller outer girth sheets (4) connects dividing plate
(5), the top of this dividing plate (5) and the hanging of described guide vane (7), and the table towards inner side of described dividing plate (5)
Face is the inclined-plane tilted towards outside.
Raymond bowl mill the most according to claim 1, it is characterised in that girth sheets (3) towards outside in described impeller
The part being positioned on described flange (8) on surface is respectively arranged with protective plate in the part being positioned under described flange (8).
Raymond bowl mill the most according to claim 2, it is characterised in that described protective plate is antifriction alloy plate, described resistance to
Mill alloy sheets is welded in girth sheets (3) in described impeller.
Raymond bowl mill the most according to claim 1, it is characterised in that the top of described dividing plate (5) is coated with protective cover
Plate (6).
Raymond bowl mill the most according to claim 1, it is characterised in that along the outer rim of described coal-grinding bowl (1), described impeller
Interior girth sheets (3) and described dividing plate (5) include multiple arc subsegment respectively.
Raymond bowl mill the most according to claim 1, it is characterised in that girth sheets (3) and described dividing plate (5) in described impeller
Between spacing minimum at distance be 44～46mm.
Raymond bowl mill the most according to claim 1, it is characterised in that in described impeller, girth sheets (3) is detachably connected
In described coal-grinding bowl (1), described dividing plate (5) is removably attachable to described impeller outer girth sheets (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620738873.7U CN205731448U (en) | 2016-07-13 | 2016-07-13 | Raymond bowl mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620738873.7U CN205731448U (en) | 2016-07-13 | 2016-07-13 | Raymond bowl mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205731448U true CN205731448U (en) | 2016-11-30 |
Family
ID=57379078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620738873.7U Active CN205731448U (en) | 2016-07-13 | 2016-07-13 | Raymond bowl mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205731448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-07-13 CN CN201620738873.7U patent/CN205731448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |