CN207941711U - A kind of centripetal high-efficient powder concentrator - Google Patents
A kind of centripetal high-efficient powder concentrator Download PDFInfo
- Publication number
- CN207941711U CN207941711U CN201721538951.XU CN201721538951U CN207941711U CN 207941711 U CN207941711 U CN 207941711U CN 201721538951 U CN201721538951 U CN 201721538951U CN 207941711 U CN207941711 U CN 207941711U
- Authority
- CN
- China
- Prior art keywords
- wing section
- powder
- wind wing
- powder concentrator
- movable vane
- 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.)
- Withdrawn - After Issue
Links
- 239000000843 powder Substances 0.000 title claims abstract description 209
- 230000007704 transition Effects 0.000 claims abstract description 9
- 206010008190 Cerebrovascular accident Diseases 0.000 claims description 28
- 208000006011 Stroke Diseases 0.000 claims description 28
- 238000000227 grinding Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000009533 lab test Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 34
- 239000000047 product Substances 0.000 description 30
- 239000000463 material Substances 0.000 description 18
- 239000002893 slag Substances 0.000 description 17
- 230000005484 gravity Effects 0.000 description 12
- 238000004364 calculation method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000009826 distribution Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000007480 spreading Effects 0.000 description 7
- 238000003892 spreading Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000003340 mental effect Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The utility model is related to a kind of centripetal high-efficient powder concentrators, including powder concentrator, and the product outlet on powder concentrator top is arranged；Connect the air inlet and spout of powder concentrator；Coarse powder collection cone positioned at powder concentrator lower end；The movable vane piece above and below rotor of powder separator is arranged in rotor of powder separator in powder concentrator, corresponds to and is equipped with stator blade on powder concentrator described in movable vane piece position；The movable vane piece includes exogenous wind wing section, interior wind wing section, arc transition between the exogenous wind wing section and interior wind wing section；Technique effect synthesis CFD theory analysis, laboratory test, the commercial Application creation data of the centripetal sorting powder concentrator of the utility model, are mainly reflected in the aspects such as powder concentrator resistance is low, grinding efficiency is high, sorting clarity height.
Description
Technical field
The utility model belongs to grinding technology field, more particularly to a kind of centripetal high-efficient powder concentrator.
Background technology
Powder concentrator technology develops with the application of circle stream milling system, experienced centrifugal classifier (first generation), rotation
The evolution of wind formula powder concentrator (second generation), efficient cage modle powder concentrator (third generation).Efficient cage modle powder concentrator is earliest by Japan
The fields little Ye company is then widely used in various materials, the production of various fineness of ball mill and vertical mill system in 1979 utility models
The grinding system of product, China national building materials office tissue has introduced this technology within 1987.30 since cage modle powder concentrator comes out
Between for many years, there are a variety of variations in structure type, and product category emerges one after another, but central principle is essentially identical：By outer ring
Fixed wind blade and internal pillar cage-type rotor composition carry power, material from gravity and rotor centrifugal force by control gas
The balance of three power sorts material, and powder schematic diagram is selected to see Figure 14 and Figure 15.
The operation principle of traditional three force balance powder concentrator is as follows：Go out spout of the grind materials by elevator via powder concentrator
5 feeding powder concentrators, under gravity, the material for feeding powder concentrator enters spreading disk 6.Spreading disk 6 follows rotor of powder separator 2
Rotated with certain speed, drive the material rotation for falling into thereon to be sorted, wait for sorting material under the influence of centrifugal force by
It sheds to buffer board 7, and is broken up, then fall under gravity into the choosing between movable vane piece 1,3 and stator blade 8
Powder area.Primary and secondary air enters powder concentrator through air inlet 9, then flows through stator blade 8 and enters powder-separating area 12, into the gas of powder-separating area
Flow rotor blade 1,3 drive and the double action of 8 water conservancy diversion of stator blade under rotate with rotor, simultaneously flow through rotor blade 1,
3, most powder concentrator is left through internal rotor and powder concentrator outlet afterwards.The material particles for falling into powder-separating area follow powder-separating area swirling eddy
Movement, by pulling power F shown in figure 15d, gravity G, centrifugal force Fc, and generate thickness grading by following conditions：
1) for Fd≥FcParticle, on the one hand subsiding movement is done under the action of gravity G, if particle is in powder-separating area height H
Sedimentation time be t1, on the other hand in Fd、FcIt is moved to internal rotor with air-flow under force action, if wide between passing through powder-separating area
The time for spending S is t2If t1>t2, then particle, which can enter internal rotor, becomes fine powder finished product, if t1<t2, then enter coarse powder
Collection cone 11.
2) for Fd＜ FcParticle, particle on the one hand in Fd、FcDo centrifugal movement to stator blade under force action, with
Coarse powder collection cone 11 is eventually fallen under gravity.
For given particle, pulling power Fd, changeless in stator blade angle mainly by the blast velocity control of powder-separating area
Under the conditions of, by the Boiler pressure control into powder concentrator, actually namely by system fan control, in given grinding system, by
Determine in Fan Selection, therefore FdMaximum value it is substantially fixed；Centrifugal force FcMainly by the rotating speed control of rotor of powder separator 2
System, stator blade angle also has an impact it in addition, but selects powder for the nonadjustable powder concentrator of stator blade or in work
Machine is mainly controlled by the rotating speed of rotor 2.
According to industrial practice and theory analysis, three force balance powder concentrator principle is primarily present following deficiency：1) it works
Under state, movable vane piece 1 follows rotor 2 to rotate, and drives the air-flow rotation for passing through movable vane piece gap, is located under the influence of centrifugal force
The air-flow in movable vane piece gap will produce centrifugation dynamic pressure, increase the flow resistance of follow-up air-flow, that is, increases and select powder drag losses；2)
Grain pulling power FdIt (is theoretically strictly reduced with the increase of powder concentrator rotating speed) without apparent relationship with powder concentrator rotating speed, and from
Mental and physical efforts FcWith square direct proportionality of powder concentrator rotating speed, therefore grinding efficiency is reduced with the increase of powder concentrator rotating speed, especially
It is when sorting the finished product of the high fineness such as cement, and this phenomenon becomes apparent, to reduce mill efficiency, increase system electricity
Consumption.
Invention content
The utility model provides that a kind of powder concentrator resistance is low, powder is selected to imitate to solve technical problem present in known technology
The centripetal high-efficient powder concentrator that rate is high, sorting clarity is high.
The utility model is adopted the technical scheme that solve technical problem present in known technology：
A kind of centripetal high-efficient powder concentrator, including powder concentrator, are arranged the product outlet on powder concentrator top；Powder is selected in connection
The air inlet and spout of casing body；Coarse powder collection cone positioned at powder concentrator lower end；Choosing in powder concentrator
The movable vane piece above and below rotor of powder separator is arranged in powder machine rotor, corresponds to and pacifies on powder concentrator described in movable vane piece position
Equipped with stator blade；It is characterized in that：The movable vane piece uses centripetal movable vane piece, including exogenous wind wing section, interior wind wing section, the exogenous wind
Arc transition between wing section and interior wind wing section, the adjacent movable vane piece most short air gap are the 1.5 of the exogenous wind wing segment length of movable vane piece
± 0.5 times.
The utility model can also adopt the following technical scheme that：
The movable vane piece includes exogenous wind wing section, interior wind wing section, arc transition between the exogenous wind wing section and interior wind wing section；By
Rotor blade tactical diameter D (mm) calculate movable vane piece cross section structure parameter be：The length L1=(25~35) of exogenous wind wing section
D/1000(mm)；Length L2=(20~30) D/1000 (mm) of interior wind wing section；External arc between exogenous wind wing section and interior wind wing section
Radius R=(25~30) D/1000 (mm), angle β=120 ± 10 ° of exogenous wind wing section and interior wind wing section, interior wind wing section and level
Angle α=15 ± 5 ° of line；Thickness t=10~20mm of movable vane piece.
The movable vane piece includes exogenous wind wing section, apoplexy wing section, interior wind wing section, the apoplexy wing section and exogenous wind wing section, interior wind
Arc transition between wing section；By rotor blade tactical diameter D (mm) calculate movable vane piece cross section structure parameter be：Exogenous wind wing section
Length L1=(25~35) D/1000 (mm)；Length L2=(20~30) D/1000 (mm) of interior wind wing section；Apoplexy wing section
Length L3=(10~20) D/1000 (mm), external arc R1=(15~20) D/1000 between apoplexy wing section and exogenous wind wing section
(mm), external arc R2=(10~18) D/1000 (mm) between apoplexy wing section and interior wind wing section, exogenous wind wing section are pressed from both sides with apoplexy wing section
Angle beta=50 ± 10 °, angle α=15 ± 5 ° of interior wind wing section and apoplexy wing section；Thickness t=10~20mm of movable vane piece.
The spout the top of powder concentrator, powder concentrator side or be arranged in the lower end of powder concentrator.
The utility model has the advantages and positive effects of：The utility model uses above-mentioned technical proposal, centripetal sorting
Powder concentrator has the technical effect that powder concentrator resistance is low, grinding efficiency is high, high three aspects of sorting clarity, comprehensive
CFD theory analysis, laboratory test, commercial Application creation data, technique effect are as follows：
1) compared to the O-Sepa powder concentrators of traditional three force balance, powder concentrator resistance reduces by 25~30%, and grinding efficiency carries
High by 8~10%, bypass value β≤5%, host power consumption reduces by 12.4%, and finished product increases by 15%~20% than table, finished particle distribution
N values reduce by 7%~8%.
2) compared to space portion three force balance powder concentrator, system throughput improves 20%, and finished product increases by 8%~10% than table, at
Product distribution of particles n values reduce by 6%~7%, and system power consumption reduces by 10%~12.5% (range of decrease >=2kWh/t).
3) grinding efficiency that adjustment different-grain diameter particle is realized by adjusting the angle of exogenous wind wing, effectively controls the grain of finished product
Degree distribution, finished particle grading is wide, has meet that different product grading gradings require to select powder ability, be highly suitable for cement,
The more demanding material grinding system of the final product qualities such as slag.
Description of the drawings
Fig. 1 is the structural schematic diagram of centripetal high-efficient powder concentrator embodiment 1；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is traditional three force balance sorting rotor principle model figure；
Fig. 3-1 is E-E sectional views in Fig. 3；
Fig. 4 is the utility model rotor blade principle model figure；
Fig. 4-1 is F-F sectional views in Fig. 4；
Fig. 5 is that air outlet sorts velocity structure schematic diagram inside and outside rotor without traditional three force balance under the conditions of air inducing；
Fig. 6 is air outlet without velocity structure schematic diagram inside and outside centripetal sorting rotor under the conditions of air inducing；
Fig. 7 is the centripetal sorting of TRMS43.3 slag mills, space portion three force balance powder concentrator CFD calculating sorting curve graphs；
Fig. 8 is the structural schematic diagram of centripetal high-efficient powder concentrator embodiment 2；
Fig. 9 is B-B sectional views in Fig. 8；
Figure 10 is the structural schematic diagram of centripetal high-efficient powder concentrator embodiment 3；
Figure 11 is C-C sectional views in Figure 10；
Figure 12 is movable vane piece structural schematic diagram；
Figure 13 is movable vane piece another kind structural schematic diagram；
Figure 14 is traditional three force balance powder concentrator structural schematic diagram；
Figure 15 is D-D sectional views in Figure 14.
In figure：1, one section of movable vane piece；1-1, exogenous wind wing section；1-2, interior wind wing section, 1-3, apoplexy wing section；2, powder concentrator turns
Son；3, two sections of movable vane pieces；4, product outlet；5, spout；6, spreading disk；7, buffer board, 8, stator blade；9, air inlet；10, three
Secondary wind entrance；11, coarse powder collection cone；The powder-separating areas 12-.
Specific implementation mode
For that can further appreciate that the invention, features and effects of the utility model, the following examples are hereby given, and coordinates
Detailed description are as follows for attached drawing：
Embodiment 1, please refers to Fig.1 and powder is being selected in Fig. 2, a kind of centripetal high-efficient powder concentrator, including powder concentrator 13, setting
The product outlet 4 on machine top；It connects the air inlet of powder concentrator and the spout 5 on top is set；Corresponding spout position
It sets and is equipped with spreading disk 6 in powder concentrator, corresponding spreading disk position is equipped with material buffer plate 7, is located at powder concentrator lower end
Coarse powder collection cone 11 is equipped with tertiary air entrance 10 on coarse powder collection cone；Rotor of powder separator 2 in powder concentrator,
Movable vane piece above and below rotor of powder separator is set, the movable vane piece of top is for ease of illustration named as one section of movable vane piece 1,
The movable vane piece of lower section is named as two sections of movable vane pieces 3, corresponds to and stator blade is installed on powder concentrator described in movable vane piece position；Institute
It includes exogenous wind wing section 1-1, interior wind wing section 1-2, circular arc between the exogenous wind wing section 1-1 and interior wind wing section 1-2 to state movable vane piece (1,3)
Transition；The arranged direction of the exogenous wind wing section of the movable vane piece is arranged along rotor direction of rotation on rotor of powder separator；Exogenous wind wing section
Length L1=(25~35) D/1000 (mm)；Length L2=(20~30) D/1000 (mm) of interior wind wing section；Exogenous wind wing section and
Angle β=120 of outer arc radius R=(25~30) D/1000 (mm) between interior wind wing section, exogenous wind wing section and interior wind wing section ±
10 °, interior wind wing section and horizontal angle α=15 ± 5 °；Thickness t=10~20mm of movable vane piece；3 are please referred to Fig.1, the phase
Adjacent movable vane piece most short air gap is 1.5 ± 0.5 times of the exogenous wind wing segment length of movable vane piece, and above-mentioned D (mm) indicates movable vane piece revolution
Diameter.
For convenience of technical-constructive design and narration, following process structure parameter is set：Powder concentrator ability P (t/h), selects powder wind
Measure Q (m3/ h), select powder concentration Cs(g/m3), movable vane piece effective height H (mm), movable vane piece tactical diameter D (mm), rotor ratio of height to diameter
H/D, rotor radial wind speed Vr(m/s), movable vane piece gap wind speed Vb(m/s), adjacent movable vane piece most short air gap Db(mm), movable vane piece
Number Nb。
Movable vane piece structural parameters：Angle parameter α (°), β (°), exogenous wind wing length L1 (mm), interior wind wing length L2 (mm), in
Wind wing length L3 (mm), fillet R (mm), R1 (mm), R2 (mm), vane thickness t (mm).
According to the centripetal high-efficient powder concentrator design method of above-described embodiment 1, include the following steps,
1) powder concentration C is selected according to sorting the suitable of different materials(g/m3) and powder concentrator designed capacity P (t/h), calculate choosing
Powder air quantity Q (m3/h):
Q=1000000 × P/Cs (1)
2) rotor ratio of height to diameter H/D=0.4~0.5；
3) by selecting powder air quantity Q (m3/ h), ratio of height to diameter H/D, rotor radial wind speed Vr(m/s), movable vane piece tactical diameter D is calculated
(mm)：
4) by movable vane piece tactical diameter D (mm), ratio of height to diameter H/D, movable vane piece effective height H (mm) is calculated:
H=D* (H/D) (3)
5) cross section structure and parameter of movable vane piece are calculated by root diameter D (mm)：
6) according to the movable vane structural parameters being calculated, movable vane piece conceptual scheme is drawn；
7) according to the exogenous wind wing segment length of movable vane piece conceptual scheme, movable vane piece tactical diameter D (mm), movable vane piece, between movable vane piece
Gap wind speed Vb(m/s), adjacent movable vane piece most short air gap Db(mm), movable vane piece number N is calculatedb：
8) arranged direction of the exogenous wind wing section of centripetal sorting movable vane piece is arranged along rotor direction of rotation on rotor of powder separator；
9) start powder concentrator, realization is centripetal to select powder.
The present embodiment operation principle：It please refers to Fig.1 and Fig. 2, goes out grind materials and fed via the spout 5 of powder concentrator by elevator
Enter powder concentrator, under gravity, the material for feeding powder concentrator enters spreading disk 6.Spreading disk 6 follow rotor of powder separator 2 with
Certain speed rotation drives the material rotation for falling into thereon to be sorted, waits for that sorting material is thrown under the influence of centrifugal force
It spreads to buffer board 7, and is broken up, then fall under gravity into and select powder between movable vane piece 1,3 and stator blade 8
Area.Primary and secondary air enters powder concentrator through air inlet 9, and installation position of the primary and secondary air through air inlet 9 belongs to the prior art, then
Flow through stator blade 8 and enter powder-separating area 12, into powder-separating area air-flow rotor blade 1,3 drive and 8 water conservancy diversion of stator blade it is double
Recast rotates under with rotor, simultaneously flows through rotor blade 1,3, is most left afterwards through internal rotor and powder concentrator product outlet 4
Powder concentrator.The utility model generates centripetal dynamic pressure using exogenous wind wing in rotary course, flows through movable vane piece using interior wind wing balance
The centrifugation dynamic pressure that high speed rotation air-flow generates afterwards, powder resistance is selected to reach to be greatly lowered；The interior wind wing of movable vane piece, outer simultaneously
Wind wing also have prevent finished product return powder-separating area generate it is secondary select the unfavorable phenomenon of powder, select powder resistance to realize reduction while protecting
The higher grinding efficiency excellent performance of card.
The material particles for falling into powder-separating area 12 follow powder-separating area swirling eddy to move, by pulling power F shown in Fig. 2d, to
Mental and physical efforts Fb, gravity G, centrifugal force Fc, and generate thickness grading by following conditions：
1) for Fd+Fb≥FcParticle, on the one hand do subsiding movement under the action of gravity G, if sedimentation powder-separating area height
The time of H is t1, on the other hand in Fd、FcIt is moved to internal rotor with air-flow under force action, if passing through width S between powder-separating area
Time be t2If t1>t2, then particle, which can enter internal rotor, becomes fine powder finished product, if t1<t2, then enter coarse powder and receive
Collection cone 11.
2) for Fd+Fb＜ FcParticle, particle on the one hand in Fd、Fb、FcCentrifugal movement is done to stator blade under force action,
It is same to eventually fall into coarse powder collection cone 11 under the effect of gravity.
Centripetal force F is put to verify the utility model core technology from principlebPresence, respectively structure figures 3, Fig. 4 institutes
Traditional three force balance sorting rotor blade model, the centripetal sorting rotor blade model shown, then uses the side of CFD theoretical calculations
Velocity field inside and outside the identical working condition lower rotor part of method numerical solution, model parameter, calculation of boundary conditions and result of calculation are as follows：
1 model parameter of table and calculation of boundary conditions
2 MODEL C FD result of calculations of table
The purpose that the inlet velocity of two kinds of models and outlet pressure are disposed as 0 is to ensure that by calculation of boundary conditions in table 1
Two kinds of models are without system air inducing condition, and the internal gas flow direction of two schemes is completely by respective under identical working condition
Caused by the aerodynamic characteristic of rotor blade, no other factors interference.
2 result of calculation of table shows that three force balance sorting model inlet pressure is higher than outlet pressure, inlet flow rate-
0.005kg/s, rate of discharge 0.005kg/s, negative value show to flow out, and positive value is flows into, i.e., three force balance sorts the physics of model
" entrance " is actually " outlet ", and " outlet " becomes " entrance ".Centripetal sorting model inlet pressure is less than outlet pressure, and goes out
Mouth is micro-positive pressure, and the physical entry of inlet flow rate 0.003kg/s, rate of discharge -0.003kg/s, i.e., centripetal sorting model are real
The inflow entrance on border, outlet are also actual outflux.Two kinds of models under identical working condition, airflow direction completely on the contrary,
It also can clearly be confirmed from Fig. 5, Fig. 6 speed vector figure.Under conditions of particle is suspended in air-flow, air-flow active, particle quilt
Dynamic, gas-solid speed difference just will produce pulling power, since the air-flow macroscopic view flowing inside and outside centripetal sorting model rotor is directed towards rotor
Inside, therefore this pulling power generated by rotor blade rotation is referred to as centripetal force Fb。
Under actual operating conditions, though rotor outlet has induced air negative-pressure, since the gap wind speed (3~5m/s) of movable vane piece is remote
Less than the linear velocity (18~20m/s, superfine powder sorting machine can be up to 30~40m/s) of rotor blade, centripetal sorting movable vane piece
The exogenous wind wing air that still has the function of compressing between adjacent movable vane piece flowed to internal rotor, therefore centripetal force FbThere are still,
The pulling power F for cooperateing with air-introduced machine to generatedThe common speed for accelerating finished particle to pass through powder-separating area 12 shortens crossing time t2,
Grain sedimentation time t1Under conditions of certain, the output into internal rotor increases, to greatly improve grinding efficiency.This is export-oriented
There is the shape of the heart sorting movable vane piece curved indentations structure to be cut to the air-flow of powder-separating area 12 under the conditions of identical rotor speed
It is greater than three force balance to pulling effect and sorts movable vane piece, the air-flow of powder-separating area 12 can obtains higher tangential velocity, it is ensured that more
More non-finished product coarse granule centrifugations far from rotor and fall under gravity into coarse powder bin 11, and powder clarity is selected to improve.
According to table 2, three force balance model entrance-outlet pressure difference is 0.45Pa, entrance-outlet pressure of centripetal sorting model
For -0.8Pa, the two pressure head direction is completely opposite.Under actual operating condition, under the action of rotor outlet induced air negative-pressure, nothing
By three force balance sorting or centripetal sorting, air-flow is to flow to export from entrance, therefore sort three force balance, and air-introduced machine must
Powder resistance is selected in entrance-outlet pressure difference that rotor of powder separator blade must be overcome to generate, increase, but for centripetal sorting, due to rotor
It is downbeam to generate pressure head direction, namely pushes air-flow flow forward, and rotor of powder separator plays similar relay pump, therefore
It can be greatly lowered and select powder resistance.It is common by replacing using Tianjin institute TRM56.4 raw mill material object powder concentrators as research object
TRM, LV, Leosche, space portion L three force balances sorting movable vane piece and centripetal sorting movable vane piece select powder under identical working condition
Machine CFD calculates resistance and is shown in Table 3.
The sorting of TRM56.4 raw mill three force balances, centripetal sorting resistance versus under 3 identical operating mode of table
| Movable vane piece scheme | Inlet pressure (Pa) | Outlet pressure (Pa) | Powder concentrator resistance (Pa) | Rotor speed (rpm) |
| TRM | -4589 | -8502 | 3913 | 57 |
| LV | -5545 | -8501 | 2955 | 57 |
| Leosche | -4470 | -8501 | 4030 | 57 |
| Space portion L | -5122 | -8502 | 3380 | 57 |
| Centripetal sorting | -6246 | -8501 | 2254 | 57 |
Table 3 shows that centripetal sorting resistance reduces by 23%~42% compared with three force balance sorting resistance in identical working condition, from
And prove that the load of air-introduced machine can be greatly lowered in centripetal sorting, save system power consumption.
The centripetal sorting powder concentrator of CFD theoretical calculations and common three force balance powder concentrator resistance versus are shown in Table 3, sort Trump
Curve is shown in that the centripetal sorting of Fig. 7 TRMS43.3 slag mills, space portion three force balance powder concentrator CFD calculate sorting curve graph
3 theoretical calculation of table shows centripetal sorting powder concentrator more traditional three force balance powder concentrator under identical working condition
Resistance drop 23%~42%.Figure 11 shows bypass value β≤5% of centripetal sorting powder concentrator, and space portion three force balance powder concentrator
Bypass value β ≈ 10% (bypass value β >=10% of major part O-Sepa powder concentrators in industrial practice), for slag milling
Speech, the particle of grain size >=45 μm is already belonging to coarse granule, but space portion three force balance powder concentrator protects the particle of grain size≤80 μm
Hold lower washability (higher grinding efficiency), i.e., under identical powder concentrator speed conditions, space portion three force balance powder concentrator
Finished product grain size it is thicker.In practical operation, finish fineness, three force balance powder concentrator just need higher powder concentrator to turn in order to control
Speed, and then increase circulating load, reduce mill efficiency and system throughput, increase system power consumption；In contrast, in identical finished product
Under fineness control condition, powder concentrator is low compared to the rotating speed of three force balance powder concentrator, efficient, circulating load is small for centripetal sorting,
So as to increase substantially mill efficiency and system throughput, system power consumption is reduced.
To verify the actual effect of centripetal sorting powder concentrator, the basis that in October, 2015, Tianjin institute tested in a large number of experiments room
On first centripetal sorting powder concentrator be subjected to commercial Application in advance TRMS43.3 slag mills, and with traditional O-Sepa of our factory
Powder concentrator, space portion powder concentrator are compared under essentially identical working condition, are specifically shown in Table 4, table 5, table 6.
The centripetal sorting powder concentrator nominal data of 4 advance TRMS43.3 slag mills of table
5 advance TRMS43.3 slag mill spaces portion three force balance powder concentrator nominal data of table
Table 4,5 note of table：The voltameter of 1- slag mill exhaust blowers breaks down, and fails to read initial data, consumes total electricity
Amount subtracts slag mill main motor, slag mill transformer (subsidiary engine) inverse by slag mill total input-wire.
According to the commercial Application nominal data of 5 two kinds of table 4, table powder concentrators, centripetal sorting powder concentrator is flat compared to three power of space portion
Weigh powder concentrator, and under the same operating conditions, finished product increases 4m than table2/ kg, system throughput improve 19.8t/h (nearly 20%),
System power consumption reduces 1.7kWh/t, due to grinding outsourcing raw materials of slag grindability T when table 5 is demarcated3000=78.9min is much smaller than table
The self-produced slag grindability T of grinding when 4 calibration3000=90.2min, the space portion three force balance converted to 4 raw materials of slag of table select powder
The system power consumption of machine is 39.5kWh/t, accordingly centripetal sorting powder concentrator system saving electricity=39.5- under identical working condition
34.4=5.1kWh/t, the range of decrease 12.9%.
6 advance 1#TRMS43.3 slag mill spaces portion three force balance powder concentrator of table demarcates powdered ore quality
The centripetal sorting of 7 advance 1#TRMS43.3 slag mills of table, 2#/3# mill O-sepa powder concentrators demarcate powdered ore quality
According to table 6,1# grinds space portion three force balance powder concentrator, finished product R45μm=2.5%, D10=2.071 μm, D50=11.839 μ
M, D90=36.903 μm, distribution of particles n values 1.109.
According to table 7,1# grinds centripetal sorting powder concentrator, finished product R45μm=3.52%, D10=1.67 μm, D50=11.278 μm, D90
=38.2643 μm, distribution of particles n values 1.046.
According to table 7,2#/3# grinds O-Sepa powder concentrators, finished product R45μm=1.5%, D10=1.77 μm, D50=11.317 μm, D90
=34.339 μm, distribution of particles n values 1.126.
According to the correction data of above-mentioned 3 kinds of powder concentrator schemes, the more centripetal sorting choosing of 45 μm of fineness of three force balance powder concentrator
Powder machine it is thin, but from D10、D50、D90, uniformity coefficient n values data see that grain composition is obviously partially narrow, and centripetal select powder
Machine obviously has the characteristics that grain composition is wide, is very beneficial for improving the performance of cement, miberal powder.The grain composition of finished product mainly by
Grinding generates, and mill efficiency is higher, and finished particle grading is wider, and the fact that the finished particle grading of centripetal sorting powder concentrator is wide is proper
Its grinding efficiency height, sorting clearly performance are demonstrated, because high grinding efficiency and sorting clarity just can guarantee grinding system
It unites lower circulating load, higher mill efficiency.
Embodiment 2, please refers to Fig. 8 and Fig. 9, a kind of centripetal high-efficient powder concentrator, including powder concentrator 13, and powder is being selected in setting
The product outlet 4 on machine top；The air inlet 9 and spout 5 of powder concentrator are connected, such type belongs to the air inlet of the prior art
Mouth and spout are same；Its spout is in the side of powder concentrator；Coarse powder collection cone positioned at powder concentrator lower end,
Tertiary air entrance 10 is equipped on coarse powder collection cone；Rotor of powder separator is arranged in rotor of powder separator 2 in powder concentrator
Above and below movable vane piece, the movable vane piece of top is for ease of illustration named as one section of movable vane piece 1, by the movable vane piece of lower section
Two sections of movable vane pieces 3 are named as, corresponds to and stator blade is installed on powder concentrator described in movable vane piece position；The movable vane piece includes outer
Wind wing section 1-1, apoplexy wing section 1-3, interior wind wing section 1-2, circular arc mistake between the apoplexy wing section and exogenous wind wing section, interior wind wing section
It crosses；Length L1=(25~35) D/1000 (mm) of the exogenous wind wing section；Length L2=(20~30) D/1000 of interior wind wing section
(mm)；Length L3=(10~20) D/1000 (mm) of apoplexy wing section, external arc R1=(15 between apoplexy wing section and exogenous wind wing section
~20) D/1000 (mm), external arc R2=(10~18) D/1000 (mm) between apoplexy wing section and interior wind wing section, exogenous wind wing section L1
With apoplexy wing section angle β=50 ± 10 °, angle α=15 ± 5 ° of interior wind wing section and apoplexy wing section；The thickness t=10 of movable vane piece
~20mm；4 are please referred to Fig.1, the adjacent movable vane piece most short air gap is 1.5 ± 0.5 times of the exogenous wind wing segment length of movable vane piece, on
The D (mm) stated indicates movable vane piece tactical diameter；The spout in the side of powder concentrator or.
Embodiment 3, please refers to Fig.1 0 and Figure 11, a kind of centripetal high-efficient powder concentrator, including powder concentrator 13, and setting is being selected
The product outlet 4 on powder machine top；Connect powder concentrator air inlet 9 and spout 5, such type belong to the prior art into
Air port and spout are same；Its spout is in powder concentrator in the lower end of powder concentrator；Under powder concentrator
The coarse powder collection cone at end；Rotor of powder separator 2 in powder concentrator is arranged dynamic above and below rotor of powder separator
For ease of illustration the movable vane piece of top is named as one section of movable vane piece 1 by blade, the movable vane piece of lower section is named as two sections of movable vane pieces
3, it corresponds to and stator blade is installed on powder concentrator described in movable vane piece position；The movable vane piece include exogenous wind wing section, apoplexy wing section,
Interior wind wing section, arc transition between the apoplexy wing section and exogenous wind wing section, interior wind wing section；The length L1=of the exogenous wind wing section
(25~35) D/1000 (mm)；Length L2=(20~30) D/1000 (mm) of interior wind wing section；The length L3=(10 of apoplexy wing section
~20) D/1000 (mm), external arc R1=(15~20) D/1000 (mm) between apoplexy wing section and exogenous wind wing section, apoplexy wing section with
External arc R2=(10~18) D/1000 (mm) between interior wind wing section, exogenous wind wing section L1 and apoplexy wing section angle β=50 ± 10 °,
Angle α=15 ± 5 ° of interior wind wing section and apoplexy wing section；Thickness t=10~20mm of movable vane piece；Please refer to Fig.1 4, it is described adjacent
Movable vane piece most short air gap is 1.5 ± 0.5 times of the exogenous wind wing segment length of movable vane piece, and above-mentioned D (mm) indicates that movable vane piece revolution is straight
Diameter；The spout is in the side of powder concentrator or is arranged in the lower end of powder concentrator.
The utility model principle is different from the main feature that traditional " three force balance " selects powder principle：1) by the gas of movable vane piece
Dynamic shape air between compressing adjacent movable vane piece in following rotor rotation process is flowed to internal rotor, increases powder-separating area air-flow
Radial velocity component, to generate centripetal force F to the particle for being suspended in powder-separating areab；2) bending direction of movable vane piece is along rotor rotation side
To arrangement；3) particle for being suspended in powder-separating area is in the trend pulled to internal rotor by rotor blade, and traditional three power are flat
Weighing apparatus selects the particle of powder principle powder-separating area to be in the trend pushed out by rotor blade diameter.Above-mentioned main feature is centripetal sorting choosing
The source of powder principle.
To sum up, centripetal sorting powder concentrator has the technical effect that powder concentrator resistance is low, grinding efficiency is high, sorting is clear
Clear high three aspects of degree, comprehensive CFD theory analysis, laboratory test, commercial Application creation data, technique effect are as follows：
1) compared to the O-Sepa powder concentrators of traditional three force balance, powder concentrator resistance reduces by 25~30%, and grinding efficiency carries
High by 8~10%, bypass value β≤5%, host power consumption reduces by 12.4%, and finished product increases by 15%~20% than table, finished particle distribution
N values reduce by 7%~8%.
2) compared to space portion three force balance powder concentrator, system throughput improves 20%, and finished product increases by 8%~10% than table, at
Product distribution of particles n values reduce by 6%~7%, and system power consumption reduces by 10%~12.5% (range of decrease >=2kWh/t).
3) grinding efficiency that adjustment different-grain diameter particle is realized by adjusting the angle of exogenous wind wing, effectively controls the grain of finished product
Degree distribution, finished particle grading is wide, has meet that different product grading gradings require to select powder ability, be highly suitable for cement,
The more demanding material grinding system of the final product qualities such as slag.
The specific implementation structure and arrangement of the movable vane piece of the utility model are not limited only to above-mentioned construction and arrangement side
Formula is followed to generate particle to be sorted between centripetal dynamic pressure and powder-separating area in rotor rotation process and have with movable vane piece and be drawn by movable vane piece
The movement draged into internal rotor becomes formula for main feature.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is every according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
Claims (4)
1. a kind of centripetal high-efficient powder concentrator, including powder concentrator, are arranged the product outlet on powder concentrator top；Connect powder concentrator
The air inlet and spout of shell；Coarse powder collection cone positioned at powder concentrator lower end；Powder is selected in powder concentrator
The movable vane piece above and below rotor of powder separator is arranged in machine rotor, corresponds to and is installed on powder concentrator described in movable vane piece position
There is stator blade；It is characterized in that：The movable vane piece uses centripetal movable vane piece, including exogenous wind wing section, interior wind wing section, the exogenous wind wing
Section interior wind wing section between arc transition, the adjacent movable vane piece most short air gap be movable vane piece exogenous wind wing segment length 1.5 ±
0.5 times.
2. centripetal high-efficient powder concentrator according to claim 1, it is characterised in that：The movable vane piece includes exogenous wind wing section, interior
Wind wing section, arc transition between the exogenous wind wing section and interior wind wing section；Movable vane piece is calculated by rotor blade tactical diameter Dmm
Cross section structure parameter is：Length L1=(25~35) D/1000mm of exogenous wind wing section；The length L2=(20~30) of interior wind wing section
D/1000mm；Outer arc radius R=(25~30) D/1000mm between exogenous wind wing section and interior wind wing section, exogenous wind wing section and interior wind wing
Angle β=120 ± 10 ° of section, interior wind wing section and horizontal angle α=15 ± 5 °；Thickness t=10~20mm of movable vane piece.
3. centripetal high-efficient powder concentrator according to claim 1, it is characterised in that：The movable vane piece include exogenous wind wing section, in
Wind wing section, interior wind wing section, arc transition between the apoplexy wing section and exogenous wind wing section, interior wind wing section；It is turned round by rotor blade
The cross section structure parameter that diameter Dmm calculates movable vane piece is：Length L1=(25~35) D/1000mm of exogenous wind wing section；Interior wind wing section
Length L2=(20~30) D/1000mm；Length L3=(10~20) D/1000mm of apoplexy wing section, apoplexy wing section and exogenous wind
External arc R1=(15~20) D/1000mm between wing section, external arc R2=(10~18) D/ between apoplexy wing section and interior wind wing section
1000mm, exogenous wind wing section and apoplexy wing section angle β=50 ± 10 °, angle α=15 ± 5 ° of interior wind wing section and apoplexy wing section；It is dynamic
Thickness t=10~20mm of blade.
4. centripetal high-efficient powder concentrator according to claim 1, it is characterised in that：The spout is in the upper of powder concentrator
Portion, powder concentrator side or be arranged in the lower end of powder concentrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721538951.XU CN207941711U (en) | 2017-11-17 | 2017-11-17 | A kind of centripetal high-efficient powder concentrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721538951.XU CN207941711U (en) | 2017-11-17 | 2017-11-17 | A kind of centripetal high-efficient powder concentrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207941711U true CN207941711U (en) | 2018-10-09 |
Family
ID=63703461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721538951.XU Withdrawn - After Issue CN207941711U (en) | 2017-11-17 | 2017-11-17 | A kind of centripetal high-efficient powder concentrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207941711U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913849A (en) * | 2017-11-17 | 2018-04-17 | 天津水泥工业设计研究院有限公司 | A kind of centripetal high-efficient powder concentrator and powder concentrator design method |
| CN111617872A (en) * | 2019-09-24 | 2020-09-04 | 陕西斯达实业有限公司 | Large-scale dry-method enrichment ore dressing energy-saving and environment-friendly process for quartz-vein noble metal ore |
-
2017
- 2017-11-17 CN CN201721538951.XU patent/CN207941711U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913849A (en) * | 2017-11-17 | 2018-04-17 | 天津水泥工业设计研究院有限公司 | A kind of centripetal high-efficient powder concentrator and powder concentrator design method |
| CN107913849B (en) * | 2017-11-17 | 2023-10-24 | 天津水泥工业设计研究院有限公司 | Centripetal efficient powder concentrator and design method thereof |
| CN111617872A (en) * | 2019-09-24 | 2020-09-04 | 陕西斯达实业有限公司 | Large-scale dry-method enrichment ore dressing energy-saving and environment-friendly process for quartz-vein noble metal ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107913849B (en) | Centripetal efficient powder concentrator and design method thereof | |
| CN201799305U (en) | External circulation type vertical mill | |
| CN104984911B (en) | A kind of rotor type powder sorter | |
| CN209109277U (en) | A kind of pre-separation bypass wind roller type vertical mill | |
| CN105080698B (en) | Use the grinding process of vertical roller grinder system | |
| CN207941711U (en) | A kind of centripetal high-efficient powder concentrator | |
| CN201357145Y (en) | Efficient rotor type metal mineral powder choosing machine | |
| CN204933651U (en) | Novel vertical mill device | |
| CN204933577U (en) | Vertical Mill device | |
| CN205146692U (en) | Vortex classifier | |
| CN113369140B (en) | Design method of superfine powder concentrator based on thickness separation of semi-finished products | |
| CN107855277B (en) | Moving blade for centripetal efficient powder concentrator and design method | |
| CN208082881U (en) | A kind of centripetal powder concentrator movable vane piece | |
| CN103721940B (en) | A kind of whirlwind clarifier | |
| WO2024148867A1 (en) | Fly ash screening method | |
| CN106466653B (en) | Novel vertical mill device | |
| CN207941710U (en) | A kind of centripetal high-efficient powder concentrator movable vane piece | |
| CN201684726U (en) | Compelling airflow turbo classifier | |
| CN208928578U (en) | A kind of multistage is broken up in electrostatic and powder selection device | |
| CN112718484B (en) | Combined efficient powder concentrator for steel slag micro powder and sorting method | |
| CN202366881U (en) | Air volume adjustable powder concentrator | |
| CN109158311A (en) | A kind of multistage is broken up in electrostatic and powder selection device and method | |
| CN203972326U (en) | The raw material powder concentrator of horizontal stator blade structure | |
| CN203874841U (en) | Pulverizing system of mill | |
| CN108273637A (en) | A kind of gradient fractionation purification system of turbine classifier and silicon dioxide ultrafine powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181009 Effective date of abandoning: 20231024 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181009 Effective date of abandoning: 20231024 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |