CN206240790U - Grading plant - Google Patents
Grading plant Download PDFInfo
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- CN206240790U CN206240790U CN201621164424.2U CN201621164424U CN206240790U CN 206240790 U CN206240790 U CN 206240790U CN 201621164424 U CN201621164424 U CN 201621164424U CN 206240790 U CN206240790 U CN 206240790U
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- housing
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- air intake
- grading plant
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Abstract
The utility model is related to powder to prepare and processing technique field, disclose a kind of grading plant, grading wheel (1) including housing and in housing, housing includes the first housing (31) and the second housing (32) that communicate with each other, grading wheel (1) is in the first housing (31), second housing (32) forms the frustum that internal diameter is gradually reduced, the big opening end of second housing (32) of frustum is connected with the first housing (31), first housing (31) with big opening end including closing the arc (311) being connected, and the deflector (312) each extended over out by the junction of arc (311) and big opening end.Grading plant of the present utility model has effectiveness of classification higher.
Description
Technical field
The utility model is related to powder to prepare and processing technique field, in particular it relates to a kind of grading plant.
Background technology
Air current classifying technology is widely used in the particle preparations such as chemical industry, mineral, metallurgy, abrasive material, ceramics and processing link.From
Heart air current classifying principle is widely adopted because of its classification efficiency higher, especially the most general with third generation turbine classifier application
Time.Turbine classifier mainly includes vertical grader and horizontal grader, and the wheel shaft of the grading wheel of vertical grader is relative to water
Plane right angle setting, and the wheel shaft of the grading wheel of horizontal grader is with respect to the horizontal plane horizontally mounted, turbine classifier is in design
When need to consider multiple sport technique segments, wherein topmost three links are：The distribution of particle dispersion, classification airflow field
And to " elutriation " of entrained fines in meal.Good dispersiveness can reduce particle agglomeration, the possibility of entrainment；Uniformly,
Stabilization centrifugal force field can by particle at a certain particle diameter Accurate Classification；By being introduced into secondary gas flow to entrained fines in meal
" elutriation " is carried out, fine powder graded region can be returned to and is classified again, so as to improve effectiveness of classification.
However, existing horizontal grader internal classification airflow field is chaotic at present, distribution of air flow is less reasonable, so as to cause point
Class precision is not high, the low problem of the efficiency of separation.For example, as shown in figure 8, the ATP type air classifiers of Alpine companies, air warp
Tangential admission mouthfuls 21 ' and 323 ' produces the airflow field for vertically rotating, and horizontally-arranged grading wheel 1 ' is in the drive of rotating shaft 9 '
Backspin transfers to induce the air-flow around it to form the airflow field for rotating in the horizontal direction, and the different air-flow of both rotation directions is in classification
Interfere and cause classification flow field disorderly inside machine, so that the effectiveness of classification of horizontal grader is not high.
For the problems of prior art, the utility model builds desirable to provide a kind of flow field for gradation
Method and grading plant, the flow field construction method can be more fully classified to particle, so that grading plant has more
Effectiveness of classification high, to make up the deficiencies in the prior art part.
Utility model content
The purpose of this utility model is to provide a kind of grading plant, and the grading plant can more fully be divided particle
Level, so that grading plant has effectiveness of classification higher.
To achieve these goals, the utility model proposes a kind of grading plant.The grading plant includes：Housing, position
In the grading wheel in housing, housing includes the first housing and the second housing that communicate with each other, and grading wheel is located in first shell body, the
Two housings form the frustum that internal diameter is gradually reduced, and big opening end and the first shell body phase of the second housing of frustum connect, first shell
Body includes the arc being connected with big opening end closure, and the water conservancy diversion each extended over out by the junction of arc and big opening end
Plate.
Preferably, deflector is concave surface towards the arc of the first enclosure interior and concentric with arc.
Preferably, the osculum end of the second housing of frustum is provided with meal discharging opening, and near the second of osculum end
The second air intake passage is provided with the side wall of housing.
Preferably, the flow-disturbing component for breaing up particle is provided with second shell body.
Preferably, flow-disturbing component includes being positioned adjacent to the first spoiler at the position between two deflectors, and
It is circumferentially disposed at the inwall of the second housing and is located at second spoiler in the downstream of the first spoiler, wherein, the first spoiler
Including the first relative with deflector respectively guide surface, the second spoiler includes the second guide surface, and the second guide surface draws with first
Guide face cooperates and causes particle at least can be after the first guide surface and/or the second guide surface during rising or falling
Broken up.
Preferably, flow-disturbing component be on the length direction along the second housing set it is multigroup, and the flow-disturbing component horizontal stroke
Cross sectional shape is triangle and/or arc and/or polygon.
Preferably, symmetrical expression is gone back on the side wall of the first housing and is provided with the fine powder discharger being coaxially disposed with grading wheel.
Preferably, the axial length of grading wheel and the ratio of the diameter of grading wheel are 0.5 to 4.
Preferably, grading plant also includes feed arrangement, and feed arrangement includes charging aperture and air inlet unit, air inlet unit bag
The first intake stack and the diverter member in the first intake stack are included, is provided with the first intake stack and the first blast pipe
The charging aperture that road is connected, diverter member is arranged on the passage port that the first intake stack is connected with charging aperture, and diverter member will
The wind entered by the first intake stack is at least divided into different two strands of flow velocity, to cause the particle by charging aperture entrance at least two
Flowed out under the collective effect of the different wind of plume speed.
Preferably, diverter member has relative with the inwall of the first intake stack respectively the first air intake surface and the second air intake
Face, wherein, the first air intake surface intersects with the second air intake surface, and the first air intake surface and the second air intake surface respectively along air intake direction with
The distance between neighbouring inwall of the first intake stack is gradually reduced.
Preferably, the first air intake surface extends to the upstream of port, and the second air intake surface is extended to and passes through the first blast pipe completely
Road.
Preferably, diverter member also includes the splicing face of the first air intake surface of connection and the second air intake surface, splicing face at least portion
Divide relative with port.
Preferably, the diverter member is one or more set on the length direction along first intake stack.
Compared with prior art, grading plant of the present utility model possesses advantages below：
1) particle carries out fully dispersed and scalping first in feed arrangement, so as to the classification for alleviating grading wheel is born
Load, substantially increases operating efficiency；
2) due to the structural constraint of the first housing, the tangential air-flow for entering forms uniform rotation classification in first shell body
Flow field, the grading wheel of horizontal rotation further enhances the classification flow field, and this is being classified the structure in flow field with existing grading plant
It is different in mechanism；
3) two fine powder dischargers are symmetrical arranged on the side wall of the first housing, so as to eliminate existing grading plant due to
Flow field skew and gas velocity gradient that one side exhaust causes in graded region so that grading wheel axial flow is more evenly distributed conjunction
Reason；
4) flow-disturbing component is set in second shell body, the fine grained of reunion is broken up by increasing flow perturbation and is sticked to thick
Fine grained on particle, so that strengthening flow is acted on " elutriation " of particle, reduces the fine powder entrainment in meal, further carries
High score class precision.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is further understood to of the present utility model for providing, and constitutes a part for specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the front view of the structure according to grading plant of the present utility model；
Fig. 2 is the right view of the structure according to grading plant of the present utility model；
Fig. 3 is the structural representation of the fine powder discharger shown in Fig. 2；
Fig. 4 is the structural representation according to feed arrangement of the present utility model；
Fig. 5 is the front view of the structure of the first embodiment of the diverter member shown in Fig. 4；
Fig. 6 is the top view of the structure of the first embodiment of the diverter member shown in Fig. 4；
Fig. 7 is the schematic diagram of the second of the diverter member structure for applying example；
Fig. 8 is the structural representation of horizontal grading plant in the prior art.
Description of reference numerals
The intake stack of 1 grading wheel 21 first
The charging aperture of 22 diverter member 23
The air intake surface of 221 first air intake surface 222 second
The housing of 223 splicing face 31 first
The arc of 32 second housing 311
The meal discharging opening of 312 deflector 322
The spoiler of 323 second air intake passage 321 first
The fine powder discharger of 324 second spoiler 4
The guide surface of 5 first guide surface 6 second
The bearing of 7 belt pulley 8
9 rotating shafts
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
Fig. 1 shows the structural representation according to grading plant of the present utility model.Solid arrow is the fortune of air-flow A in figure
Dynamic direction, dotted arrow is the direction of motion of particle B.The grading plant includes：Housing, the grading wheel 1 in housing, housing
Including the first housing 31 and the second housing 32 that communicate with each other, grading wheel 1 is located in the first housing 31, and the second housing 32 forms interior
The frustum that footpath is gradually reduced, the big opening end of the second housing 32 of frustum is connected with the first housing 31, and the first housing 31 includes
The arc 311 being connected with big opening end closure, and the deflector each extended over out by the junction of arc 311 and big opening end
312。
According to the utility model, by above-mentioned setting, the first housing formed by arc 311 and deflector 312 can be made
Rotating separation flow field evenly is formed in 31 chamber, when particle B enters the first housing 31, the less particle of weight is in arc
Preferably enter in the first housing 31 under shape plate 311 and the cooperation of deflector 312, the larger particle of weight can be in self gravitation
Slipped into the second housing 32 along deflector 312 under effect, by the classification in the controllable housing of the rotary speed for setting grading wheel 1
The intensity in flow field, therefore can realize more accurately being classified particle.
In implementation method as shown in Figure 1, it is preferable that deflector 312 is concave surface towards the arc inside the first housing 31
And it is concentric with arc 311.The arc matches with the radian of arc 311, for shape in the chamber for improving the first housing 32
Into rotating separation flow field uniformity, to be preferably classified to particle B.It is further preferred that arc 311 and grading wheel
1 to be coaxially disposed, and the cross sectional shape of the two is concentrically justified as shown in Figure 1.
In being preferably carried out mode at one, the development length of deflector 312 is long more than the extension of the deflector 321
Degree.The setting can increase lift effect of the deflector 312 to particle, in the same of the uniformity for improving the flow field in the first housing 1
When so that the classification of particle is more abundant.
As shown in figure 1, the osculum end of the second housing 32 of frustum is provided with meal discharging opening 322, and near osculum
The second air intake passage 323 is provided with the side wall of second housing 32 at end.Second air intake passage 323 is used for entering the second housing
32 particle B is further classified.The particle that the wind C entered by the second air intake passage 323 will be fallen into the second housing 32 is again
Secondary to dispel, wherein the less particle of weight is classified into continuing through grading wheel 1 in the first housing 31, and weight is larger
Particle is then flowed out by meal discharging opening 322.The setting can be realized to particle by the wind C that the second air intake passage 323 enters
Further classification, so as to further provide the classification accuracy of grading plant.
According to the utility model, in implementation method as shown in Figure 1, it is provided with for breaing up particle in the second housing 32
Flow-disturbing component.The flow-disturbing component preferably includes the first spoiler at the position that is positioned adjacent between two deflectors 312
321, and be circumferentially disposed at the inwall of the second housing 32 and be located at second spoiler 324 in the downstream of the first spoiler 321,
Wherein, the first spoiler 321 includes the first relative with deflector 312 respectively guide surface 5, and the second spoiler 324 includes second
Guide surface 6, the second guide surface 6 and the first guide surface 5 cooperate and cause that particle at least can during rising or falling
Broken up after the first guide surface and/or the second guide surface.By setting flow-disturbing component, into the meal folder in the second housing 32
The fine powder of band is easily re-dispersed and with air-flow into being classified again in the first housing 31, and meal then continues whereabouts and enters meal
Discharging opening 322, therefore further provide the classification accuracy of grading plant.
It is further preferred that flow-disturbing component may be configured as multigroup on the length direction along the second housing, this is provided for
Particle to rising fully is broken up, to realize more accurately being classified.
It is further preferred that above-mentioned flow-disturbing component and diverter member 22 can be fixed on corresponding inwall by way of welding
On.And on the basis of itself function is ensured, its respective shape of cross section can be three for flow-disturbing component and diverter member 22
Angular and/or arc and/or polygon.
According to the utility model, as shown in Fig. 2 gone back on the side wall of the first housing 31 symmetrical expression be provided with it is same with grading wheel 1
The fine powder discharger 4 of axle.With reference to shown in Fig. 5 and Fig. 6, fine powder discharger 4 is connected by bearing 8 and rotating shaft 9 with grading wheel 1, is turned
One end connection belt pulley 7 of axle 9.The side wall of fine powder discharger 4 is provided with gas outlet 41 and for the through hole through rotating shaft 9
61.Being set by the symmetrical expression of fine powder discharger 4 can eliminate what grading plant was caused due to one side exhaust in the first housing 31
Flow field offsets and gas velocity gradient so that the axial flow distribution of grading wheel 1 is more reasonable, so as to be conducive to improving classification essence
Degree.
In addition, to improve grading plant to the treating capacity of powder, can be realized by lengthening the axial length of grading wheel 1,
Preferably, the axial length of grading wheel 1 and the ratio of the diameter of grading wheel 1 are 0.5 to 4.
According to the utility model, with reference to shown in Fig. 1 and Fig. 4, grading plant also includes feed arrangement, and the feed arrangement includes
Charging aperture 23 and air inlet unit, air inlet unit include the first intake stack 21 and the diverter member in the first intake stack 21
22, the charging aperture 23 being connected with the first intake stack 21 is provided with the first intake stack 21, diverter member 22 is arranged on
The passage port that one intake stack 21 is connected with charging aperture 23, the wind that diverter member 22 will be entered by the first intake stack 21 is at least
It is divided into different two strands of flow velocity, to cause the particle that is entered by charging aperture 23 in the collective effect of the different wind of at least two plumes speed
Lower outflow.
With reference to shown in Fig. 1 and Fig. 4, according to the utility model, it is connected with charging aperture 23 by the first intake stack 21
Passage port diverter member 22 is set, and the wind A entered by the first intake stack 21 can be at least divided into flow velocity by diverter member 22
Two gangs of different a1 and a2, when particle B enters fashionable by charging aperture 23, particle B under the collective effect of wind a1 and a2 by disperse and
Separate, for example, when the flow velocity of wind a1 is more than the flow velocity of wind a2, wind a1 can play certain effect of lifting to particle B, now wind
A2 can more fully be disperseed to particle B, and the less particle of weight can be hiked up with the wind in particle B, and weight is larger in particle B
Particle can fall with self gravitation so that the particle in particle B can be further classified in the feed arrangement.
It is worth noting that, the wind A that the diverter member 22 in the utility model will can also be entered by the first intake stack 21 divides for flow velocity
Different multiplies, its specific structure setting can according to actual needs, and species, construction operating mode of such as particle etc. are carried out specifically
Selection.
In implementation method as shown in Figure 7, above-mentioned air guide 22 may be configured as multiple, so as in the first blast pipe
The different air-flow of multiply speed is formed in road 21.Preferably, the speed of the multiply air-flow gradually increases from top to bottom, is beneficial to powder
Material can more into being classified at the grading wheel 1 of first chamber while more fully disperseed.
With reference to shown in Fig. 1, Fig. 5 and Fig. 6, in being preferably carried out mode at one, diverter member 22 has respectively with first
The inwall of intake stack 21 relative the first air intake surface 221 and the second air intake surface 222, wherein, the first air intake surface 221 enters with second
Wind face 222 is intersected, and the first air intake surface 221 and the second air intake surface 222 are respectively along air intake direction and the first neighbouring blast pipe
The distance between the inwall in road 21 is gradually reduced.By setting the first air intake surface 221 and the second air intake surface 222 respectively along air intake side
The size of the flow velocity of wind a1 and a2 is controlled to the distance between the neighbouring inwall of the first intake stack 21.Preferably, exist
Between the inwall of the same cross section of the first intake stack 21, the first air intake surface 221 and the first neighbouring intake stack 21 away from
From more than the distance between the second air intake surface 222 and neighbouring inwall of the first intake stack 21, the setting makes the flow velocity of wind a1
More than the flow velocity of wind a2, so as to realize to particle B preferably gradings.It is further preferred that the first air intake surface 221 with it is neighbouring
The distance between the inwall of the first intake stack 21 for the second air intake surface 222 and the first neighbouring intake stack 21 inwall it
Between 2 to 3 times of distance.
It is further preferred that the first air intake surface 221 extends to the upstream of port, the second air intake surface 222 is extended to completely by the
One intake stack 21.In the setting the second air intake surface 222 by the wind a1 and particle B entered by charging aperture 23 passage port carry out every
From, can prevent particle B in the presence of wind a1 by port blow out.
In another is preferably carried out mode, diverter member 22 also includes connection the first air intake surface 221 and the second air intake
The splicing face 223 in face 222, splicing face 233 is at least partly relative with port.The one side of the splicing face 223 is used to accept by feeding
The particle B that mouth 23 enters, are entering for particle B to provide guide surface, on the other hand when particle B is fallen on the splicing face 223,
Grain B is further broken up, so as to be conducive to wind a1 and wind a2 to the grading of particle B.Preferably, splicing face 233 with it is logical
Mouth is completely relative.
Mode is preferably carried out as shown in Figure 1, axis direction and the horizontal direction of the first intake stack 21 be in 30 °
To 75 °, axis direction and the vertical direction of charging aperture 23 are in -20 ° to 20 °.This is provided with can be more suitable beneficial to wind A and particle B
Freely enter, so as to be conducive to the classification of particle.
Compared with prior art, grading plant of the present utility model possesses advantages below：
1) particle B carries out fully dispersed and scalping so as to alleviate the classification of grading wheel 1 first in feed arrangement
Burden, substantially increases operating efficiency；
2) due to the structural constraint of the first housing 31, gas can form uniform by grading wheel 1 in the first housing 31
Rotation classification flow field, this is different on the m in classification flow field with existing grading plant；
3) two fine powder dischargers 4 are symmetrical arranged on the side wall of the first housing 31, such that it is able to eliminate existing classification dress
Put the flow field skew and gas velocity gradient caused in graded region due to one side exhaust so that the distribution of grading wheel axial flow is more closed
Reason；
4) flow-disturbing component is set in the second housing 32, the fine powder of reunion is broken up by increasing flow perturbation and is sticked to thick
Fine powder on particle, so as to strengthen " elutriation " effects of wind C to particle, reduces the fine powder entrainment in meal, further improves
Effectiveness of classification.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (13)
1. a kind of grading plant, it is characterised in that including：Housing, the grading wheel (1) in the housing, the housing bag
The first housing (31) and the second housing (32) for communicating with each other are included, the grading wheel (1) is interior positioned at first housing (31), institute
State the second housing (32) and form the frustum that is gradually reduced of internal diameter, the big opening end of second housing (32) of frustum with it is described
First housing (31) is connected, and first housing (31) with the big opening end including closing the arc (311) being connected, Yi Jiyou
The deflector (312) that the arc (311) each extends over out with the junction of the big opening end.
2. grading plant according to claim 1, it is characterised in that the deflector (312) is concave surface towards described
The internal arc of one housing (31) and concentric with the arc (311).
3. grading plant according to claim 1 and 2, it is characterised in that second housing (32) of frustum it is small
Mouth end is provided with meal discharging opening (322), and is provided with second on the side wall of second housing (32) at the osculum end
Air intake passage (323).
4. grading plant according to claim 3, it is characterised in that is provided with for breaing up in second housing (32)
The flow-disturbing component of particle.
5. grading plant according to claim 4, it is characterised in that the flow-disturbing component includes being positioned adjacent to two institutes
The first spoiler (321) at the position between deflector (312) is stated, and is circumferentially disposed at second housing (32)
Inwall and be located at first spoiler (321) downstream the second spoiler (324), wherein, first spoiler (321)
Including the first guide surface (5) relative with the deflector (312) respectively, second spoiler (324) includes the second guiding
Face (6), second guide surface (6) and first guide surface (5) cooperate and cause that the particle is rising or falling
During can at least be broken up after first guide surface and/or second guide surface.
6. grading plant according to claim 5, it is characterised in that the flow-disturbing component is the length along second housing
It is multigroup that degree side sets up, and the shape of cross section of the flow-disturbing component is triangle and/or arc and/or polygon.
7. grading plant according to claim 1 and 2, it is characterised in that also right on the side wall of first housing (31)
Title formula is provided with the fine powder discharger (4) coaxial with grading wheel (1).
8. grading plant according to claim 1 and 2, it is characterised in that the axial length of the grading wheel (1) with it is described
The ratio of the diameter of grading wheel (1) is 0.5 to 4.
9. grading plant according to claim 1 and 2, it is characterised in that the grading plant also includes feed arrangement, institute
Stating feed arrangement includes charging aperture and air inlet unit, and the air inlet unit includes the first intake stack (21) and positioned at described first
Diverter member (22) in intake stack (21), is provided with and first intake stack on first intake stack (21)
(21) charging aperture (23) being connected, the diverter member (22) is arranged on first intake stack (21) and the charging aperture
(23) wind entered by first intake stack (21) is at least divided into stream by the passage port being connected, the diverter member (22)
Speed is different two strands, to cause the particle that is entered by the charging aperture (23) in the collective effect of the different wind of at least two plumes speed
Lower outflow.
10. grading plant according to claim 9, it is characterised in that the diverter member (22) with respectively with it is described
The inwall of the first intake stack (21) relative the first air intake surface (221) and the second air intake surface (222), wherein, described first enters
Wind face (221) is intersected with second air intake surface (222), and first air intake surface (221) and second air intake surface
(222) it is gradually reduced along the distance between air intake direction and neighbouring inwall of the first intake stack (21) respectively.
11. grading plants according to claim 10, it is characterised in that first air intake surface (221) extends to described
The upstream of port, second air intake surface (222) extends to and passes through first intake stack (21) completely.
12. grading plants according to claim 11, it is characterised in that the diverter member (22) also includes that connection is described
The splicing face (223) of the first air intake surface (221) and second air intake surface (222), the splicing face (233) is at least partly and institute
State port relative.
13. grading plants according to claim 12, it is characterised in that the diverter member (22) is to enter along described first
One or more set on the length direction of wind pipeline (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164424.2U CN206240790U (en) | 2016-10-25 | 2016-10-25 | Grading plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164424.2U CN206240790U (en) | 2016-10-25 | 2016-10-25 | Grading plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206240790U true CN206240790U (en) | 2017-06-13 |
Family
ID=58996182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621164424.2U Active CN206240790U (en) | 2016-10-25 | 2016-10-25 | Grading plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206240790U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971224A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | Flow field construction method and grading plant for gradation |
| CN108554823A (en) * | 2018-05-28 | 2018-09-21 | 阜阳恒泰纺织有限公司 | A kind of cotton-wool pipeline impurities removal equipment |
| CN112958447A (en) * | 2021-02-06 | 2021-06-15 | 中国水利水电第九工程局有限公司 | Sand and stone powder removal and classification construction process |
-
2016
- 2016-10-25 CN CN201621164424.2U patent/CN206240790U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971224A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | Flow field construction method and grading plant for gradation |
| CN107971224B (en) * | 2016-10-25 | 2024-01-05 | 中国石油化工股份有限公司 | Flow field construction method and classification device for particle classification |
| CN108554823A (en) * | 2018-05-28 | 2018-09-21 | 阜阳恒泰纺织有限公司 | A kind of cotton-wool pipeline impurities removal equipment |
| CN108554823B (en) * | 2018-05-28 | 2024-04-09 | 阜阳恒泰纺织有限公司 | Pipeline impurity removing equipment for cotton wool |
| CN112958447A (en) * | 2021-02-06 | 2021-06-15 | 中国水利水电第九工程局有限公司 | Sand and stone powder removal and classification construction process |
| CN112958447B (en) * | 2021-02-06 | 2022-04-22 | 中国水利水电第九工程局有限公司 | Sand and stone powder removal and classification construction process |
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