CN206716483U - A kind of particle grading device - Google Patents
A kind of particle grading device Download PDFInfo
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- CN206716483U CN206716483U CN201720468785.4U CN201720468785U CN206716483U CN 206716483 U CN206716483 U CN 206716483U CN 201720468785 U CN201720468785 U CN 201720468785U CN 206716483 U CN206716483 U CN 206716483U
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- particle
- cyclone separator
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- particle group
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Abstract
The utility model belongs to powder process and utilization technology field, there is provided a kind of particle grading device.The arrival end of described cyclone separator cylinder center of top connection a tail wind escape pipe, arrival end are not stretched into inside cyclone separator, and the port of export of a tail wind escape pipe is connected with thin/light particle group trap；The middle and lower part of described cyclone separator cylinder is provided with First air air inlet pipe；Described cyclone separator cylinder body bottom is cone structure, with being connected at the top of settling classifier；Thick/heavy particle group collector of described settling classifier bottom connection, settling classifier bottom or thick/weight particle group collector are provided with Secondary Air air inlet pipe.Based on thick/weight particle in mixing particle diameter/density granule material and thin/light particle centrifugal force and the difference of terminal velocity, the flexible modulation of incising control can be realized by adjusting First air and Secondary Air gas velocity, and effectiveness of classification is higher；It is easy to operate, simple structure, it can be applied to normal temperature/high-temperature particle classification environment.
Description
Technical field
The utility model belongs to powder process and utilization technology field, is related to mixing particle diameter/density solid gradation/separation
Operation.
Background technology
Classification of solid particles technology is widely used in many industrial process, such as ore and sandy soil in ore dressing,
Cleaned coal and gangue in coal separation, the coal ash agglomerating separation in coal gasification, the classification of pharmaceutical industry particle screen selecting and agricultural material
With separating.The primary evaluation index of gradation includes classification efficiency, effectiveness of classification and incising control etc.；Hierarchical approaches are substantially
On can be divided into two kinds of screening and air current classifying, there have for occasion air current classifyings such as viscosity, high temperature, small size particle classifications to be unique
Advantage；Air current classifying is made by drag force, centrifugal force, gravity, inertia effect etc. in a fluid according to the particle of different-grain diameter/density
With and produce different movement locus, so as to realize the classification of different-grain diameter/density granule；Whether air current classifying is had as in grader
Moving component can be divided into static rank and dynamic classification；Dynamic classification machine refers mainly to various turbo classifiers, its effectiveness of classification
Height, incising control is easy to adjust, but equipment construction is complicated, and energy consumption is higher；Traditional static classification mainly includes inertial classification, whirlwind
Technologies such as classification, gravity classification and combinations thereof, this kind of grader simple structure, operating cost is low, operates and easy to maintenance, but point
Class precision is relatively low and incising control regulation is inconvenient.CN201320499Y discloses a kind of particle size separation device of cyclone separator,
It is in back taper that its top, which is cylindrical in shape bottom, thin material when being rotated under the action of the centrifugal force using different-grain diameter solid particle
It is more easy to move to body centre position, thickness stock grading is realized by the interior outer-cavity structure of unique design, the device is only passing
Outer-cavity structure in being introduced on the basis of the cyclone separator of system, simple structure, but classification efficiency and air inflow are closely related, and cut
Particle size adjustment inconvenience.CN2625062Y discloses a kind of Wind power eddy flow classifier, mainly by spiral case body and is respectively arranged on body
The grader of both sides is formed, and is tangentially got rid of coarse particles along vortex using the physical difference such as powder agent particle size density in air-flow
Going out to collect, the dust of tiny lightweight discharges spiral case from vortex centers by the draft of blower fan, is discharged along the exhaust passage on grader,
Movable guiding device regulation large or fine granule incising control is provided with spiral case body, the Wind power eddy flow classifier is complicated, can
The setting of the guiding device of regulation also brings the problem of spiral case housing seal.
Utility model content
The utility model is in view of the above-mentioned problems, provide a kind of whirlwind-sedimented particle grading plant and its method.
The technical solution of the utility model：
A kind of particle grading device, including cyclone separator 2, settling classifier 6, thick/weight particle group collector 4 and thin/
Light particle group trap 5；
The arrival end of the described cylinder center of top of cyclone separator 2 connection a tail wind escape pipe 1, arrival end do not stretch into whirlwind
Inside separator 2, the port of export of a tail wind escape pipe 1 is connected with thin/light particle group trap 5；The described cylinder of cyclone separator 2
Middle and lower part be provided with First air air inlet pipe 3；The described cylinder body bottom of cyclone separator 2 is cone structure, is pushed up with settling classifier 6
Portion is connected；The described bottom of settling classifier 6 connects thick/weight particle group collector 4, the bottom of settling classifier 6 or thick/weight particle
Group collector 4 is provided with Secondary Air air inlet pipe 7.
The described ratio of height to diameter of settling classifier 6 is 5-100:1.
Described thin/light particle group trap 5 is cyclone separator, inertia separator or gravity separator.
Cone is provided between the described cylinder of cyclone separator 2 and a tail wind escape pipe 1.
A kind of gradation method, step are as follows：
First air carry mixing particle diameter/density solid particle through First air air inlet pipe 3 enter cyclone separator 2 after rotate to
Upper motion, mixing particle diameter/density solid particle gradually shift to the wall of cyclone separator 2, thick/weight therein under the action of the centrifugal force
Particle and a part be thin/light particle with being deposited after the wall collision friction of cyclone separator 2, thick/weight particle of deposition and thin/light
Particle enters settling classifier 6 under gravity；The rising that slightly/weight particle and thin/light particle are passed through through Secondary Air air inlet pipe 7
After Secondary Air effect, thick/weight particle is through settling classifier 6 and enters thick/weight particle group collector 4, and thin/light particle is by secondary
Wind entrainment returns to cyclone separator 2；Secondary Air is incorporated to the First air cyclone risen in cyclone separator 2 and carries thin/light particle warp
The top a tail wind escape pipe 1 of cyclone separator 2 enters thin/light particle group trap 5.
The particle diameter of described mixing particle diameter/density solid particle is 0.01-2mm.
It is 0.01-10m/s to rise Secondary Air gas velocity in settling classifier 2.
The utility model realizes that the principle that air-flow carries mixing particle diameter/density solid particle separation/classification is：
First air carries mixing particle diameter/density solid particle and revolved after First air air inlet pipe 3 tangentially enters cyclone separator 2
Moved in steering；Solid particle is shifted to the wall of cyclone separator 2 by centrifugal action in flow rotation motion process, thick/
Weight particle due to the big movement of quality/segregation speed relatively thin/light particle faster, thick/weight particle and a part it is thin/light particle with rotation
Deposited after the wall collision friction of wind separator 2；The solid particle of deposition is fallen by Action of Gravity Field, and is entered with certain initial velocity
Enter settling classifier 6；There is the rising Secondary Air being passed through through Secondary Air air inlet pipe 7 in settling classifier 6, Secondary Air gas velocity is to cut
Cut the terminal velocity corresponding to particle diameter；Terminal velocity is higher than thick/weight particle of Secondary Air gas velocity in the solid particle of deposition, suffered
Drag force is less than gravity, accelerates to move downward, and eventually passes through settling classifier 6 and enter thick/weight particle group collector 4, deposition
Terminal velocity is less than thin/light particle of Secondary Air gas velocity in solid particle, and suffered drag force is more than gravity, and first slowing down moves downward,
Motion upwards is carried secretly by Secondary Air afterwards and returns to cyclone separator 2；Secondary Air is incorporated to the First air cyclone risen in cyclone separator 2
Carry thin/light particle and enter thin/light particle group trap 5 through the top a tail wind escape pipe 1 of cyclone separator 2.
It is located at cylinder top compared to conventional cyclone air inlet, a tail wind escape pipe is stretched into cylinder, formation decline
Contour stealth and rising inward eddy, very high classification efficiency is respectively provided with to thick/weight, thin/light particle；The rotation of the utility model design
The rotation of wind separator interior air-flow is upwards and stroke shortens, and airflow direction and the solid particle gravitational settling to suspend are in opposite direction, this
Change into having the advantage that：Pressure drop significantly reduces, while enhances taking out of for thin/light particle, and partly thin/light particle is with once
General mood rotation directly leaves cyclone separator through a tail wind escape pipe, and only a part is thin, and/light particle is with thick/weighs particle and enter classification of sedimentation
Device, reduce thick in settling classifier/weight particle and thin/light particle classification load；In the settling classifier of its top feed, particle
Residence time is short, concentration is low, back-mixing degree is very low, declines thick/weight particle and rises thin/interfering between light particle/and wraps up in
Hold under the arm and be eased, ensure that and thick/weight particle group and thin/light particle are obtained based on mixing particle diameter/density granule terminal velocity difference
Group high accuracy, high-effective classifying；Cyclone separator mutually cooperates with settling classifier：Particle diameter/density solid particle is mixed through whirlwind
Separator separate and preliminary classification after, only a part is thin/light particle enters settling classifier with thick/weight particle, helps to weaken
Decline thick/weight particle in settling classifier and rise thin/interfering between light particle/and sweep along, and in settling classifier
Rise Secondary Air and enter from bottom after cyclone separator and further enhance in cyclone separator taking out of for thin/light particle.
The beneficial effects of the utility model are：Based on thick/weight particle in mixing particle diameter/density granule material and thin/light
The difference of grain centrifugal force and terminal velocity, the flexible modulation of incising control can be realized by adjusting First air and Secondary Air gas velocity, and is classified
Precision is higher；It is easy to operate, simple structure, it can be applied to normal temperature/high-temperature particle classification environment.
Brief description of the drawings
Fig. 1 is that air-flow carrying mixing particle diameter/density solid particle separates/is classified schematic diagram in the particle grading device.
Fig. 2 is the grading effect in embodiment.
In figure：1 a tail wind escape pipe；2 cyclone separators；3 First air air inlet pipe；
4 thick/weight particle group collectors；5 thin/light particle group traps；6 settling classifiers；
7 Secondary Air air inlet pipe.
Embodiment
A kind of particle grading device and its method disclosed in this patent are further described below by specific embodiment, but
The utility model is not limited by following embodiments.
Embodiment
Testing particles used grading plant includes cyclone separator 2, settling classifier 6, thick/and of weight particle group collector 4
Carefully/light particle group trap 5；The arrival end of a tail wind escape pipe 1, arrival end are connected at the top of the cylinder of cyclone separator 2 by cone
Do not stretch into inside cyclone separator 2, the port of export of a tail wind escape pipe 1 is connected with thin/light particle group trap 5, cyclone separator 2
The bottom of cylinder is provided with First air air inlet pipe 3, and the cylinder body bottom of cyclone separator 2 is cone structure, with the top phase of settling classifier 6
Even；The ratio of height to diameter of settling classifier 6 is 20:1, the bottom of settling classifier 6 connects thick/weight particle group collector 4, thick/weight particle group
Collector 4 is provided with Secondary Air air inlet pipe 7.
Mass ratio is 1:1 20-40 mesh and the sea sand mixture of 60-100 mesh, it is 6.4m by flow3/ h First air is (empty
Gas) carry by First air air inlet pipe 3 into the particle grading device, mixing particle diameter solid particle feed rate is 10kg/h.
In the range of Secondary Air gas velocity 2.45-2.85m/s, grading effect is notable, is collected in thick/weight particle group collector 4
Material thickness mass ratio reach 10-40:1, the coarse fodder rate of recovery is near or above 90%.It is bigger to be classified gas velocity, thick/weight particle group is received
20-40 mesh and 60-100 mesh granular mass ratio are bigger in the material that storage 4 is collected, and coarse granule purity is higher, but compared with high gas velocity
Part coarse granule is carried over settling classifier 6, causes the coarse granule rate of recovery to decrease.The reduction of the coarse granule rate of recovery means
More coarse granule materials enter thin/light particle group trap 5 with fine grained, will cause the decline of fine grained purity, fit
Suitable classification of sedimentation operating range should consider coarse granule purity in the material that thick/weight particle group collector 4 is collected and its return
Yield, 2.6m/s or so is relatively reasonable classification of sedimentation gas velocity, and the speed is between 60 mesh sea sand terminal velocity uT, 60=2.0m/
S and 40 mesh sea sand terminal velocity uT, 40Among=3.2m/s, the fine grained group of 60-100 mesh is moved upwards with classification air-flow, 20-
The coarse granule group of 40 mesh moves downward, and realizes classification distribution, and too high or too low gas velocity is unfavorable for the abundant of thick-fine grained system
Separation/classification.
Claims (5)
1. a kind of particle grading device, it is characterised in that described particle grading device includes cyclone separator (2), sedimentation point
Level device (6), thick/weight particle group collector (4) and thin/light particle group trap (5)；
The arrival end of described cyclone separator (2) cylinder center of top connection a tail wind escape pipe (1), arrival end do not stretch into whirlwind
Separator (2) is internal, and the port of export of a tail wind escape pipe (1) is connected with thin/light particle group trap (5)；Described cyclonic separation
The middle and lower part of device (2) cylinder is provided with First air air inlet pipe (3)；Described cyclone separator (2) cylinder body bottom is cone structure, with
It is connected at the top of settling classifier (6)；Thick/heavy particle group collector (4) of described settling classifier (6) bottom connection, sedimentation point
Level device (6) bottom or thick/weight particle group collector (4) are provided with Secondary Air air inlet pipe (7).
2. particle grading device according to claim 1, it is characterised in that described settling classifier (6) ratio of height to diameter is
5-100:1。
3. particle grading device according to claim 1 or 2, it is characterised in that described thin/light particle group trap
(5) it is cyclone separator, inertia separator or gravity separator.
4. particle grading device according to claim 1 or 2, it is characterised in that described cyclone separator (2) cylinder with
Cone is provided between a tail wind escape pipe (1).
5. particle grading device according to claim 3, it is characterised in that described cyclone separator (2) cylinder and tail
Cone is provided between wind escape pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720468785.4U CN206716483U (en) | 2017-05-03 | 2017-05-03 | A kind of particle grading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720468785.4U CN206716483U (en) | 2017-05-03 | 2017-05-03 | A kind of particle grading device |
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| CN206716483U true CN206716483U (en) | 2017-12-08 |
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| CN201720468785.4U Active CN206716483U (en) | 2017-05-03 | 2017-05-03 | A kind of particle grading device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185837A (en) * | 2017-05-03 | 2017-09-22 | 大连理工大学 | A kind of particle grading device and its method |
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2017
- 2017-05-03 CN CN201720468785.4U patent/CN206716483U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185837A (en) * | 2017-05-03 | 2017-09-22 | 大连理工大学 | A kind of particle grading device and its method |
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