CN110624700A - Centrifugal classifier for gas-solid mixed ultrafine powder - Google Patents
Centrifugal classifier for gas-solid mixed ultrafine powder Download PDFInfo
- Publication number
- CN110624700A CN110624700A CN201910916941.2A CN201910916941A CN110624700A CN 110624700 A CN110624700 A CN 110624700A CN 201910916941 A CN201910916941 A CN 201910916941A CN 110624700 A CN110624700 A CN 110624700A
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- cylinder
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- outer sleeve
- communicated
- inner sleeve
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- 239000000843 powder Substances 0.000 title claims abstract description 57
- 239000007787 solid Substances 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000004113 Sepiolite Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910052624 sepiolite Inorganic materials 0.000 description 3
- 235000019355 sepiolite Nutrition 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/08—Other accessories for centrifuges for ventilating or producing a vacuum in the centrifuge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B3/00—Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/12—Inserts, e.g. armouring plates
- B04B7/16—Sieves or filters
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
A centrifugal classifier for gas-solid mixed superfine powder mainly solves the technical problems that the existing centrifugal classifier only carries out primary mineral powder classification, the phenomena of mixing of coarse mineral powder and fine mineral powder exist, the classification efficiency is not high, and the like. The key points of the technical scheme are as follows: the grading device is fixed on a workbench (1-2) and comprises a collecting cylinder (13), an outer sleeve (15), a filter screen (17) and an inner sleeve (18), the outer sleeve (15) is sleeved in the collecting cylinder (13), the inner sleeve (18) is sleeved in the outer sleeve (15), the filter screen (17) is sleeved on the inner sleeve (18), the conveying device is communicated with the outer sleeve (15), an outlet is formed in the bottom of the outer sleeve (15) and communicated with the collecting cylinder (13), the collecting cylinder (13) is communicated with a coarse powder collecting chamber (10), the bottom of the inner sleeve (18) is communicated with a fine powder collecting chamber (9) through a hollow shaft, the fine powder collecting chamber (9) is communicated with an air inlet of a negative pressure fan (8), and the outer sleeve (15) and the inner sleeve (18) are.
Description
Technical Field
The invention relates to a gas-solid mixed ultrafine powder centrifugal classifier.
Background
The current centrifugal gas-solid classifier has only one mineral powder classifying outlet, has the phenomenon that coarse powder and fine powder are mixed together, and has low classifying efficiency.
Disclosure of Invention
The invention aims to provide a gas-solid mixed superfine powder centrifugal classifier capable of separating two different kinds of ore powder, namely coarse ore powder and fine ore powder.
The technical scheme adopted by the invention for solving the technical problems is as follows: the fine powder classifying device comprises a power device, a conveying device, a classifying device, a negative pressure fan 8, a fine powder collecting chamber 9, a coarse powder collecting chamber 10 and a workbench 1-2, wherein the classifying device is fixed on the workbench 1-2 and comprises a collecting cylinder 13, an outer sleeve 15, a filter screen 17 and an inner sleeve 18, the outer sleeve 15 is sleeved in the collecting cylinder 13, the inner sleeve 18 is sleeved in the outer sleeve 15, the filter screen 17 is sleeved on the inner sleeve 18, the conveying device is communicated with the outer sleeve 15, an outlet is formed in the bottom of the outer sleeve 15 and communicated with the collecting cylinder 13, the collecting cylinder 13 is communicated with the coarse powder collecting chamber 10, the bottom of the inner sleeve 18 is communicated with the fine powder collecting chamber 9 through a hollow shaft, the fine powder collecting chamber 9 is communicated with an air inlet of the.
The inner sleeve 18 is a conical cylinder with a taper of 0.5-0.6.
The power device comprises a motor I6 and a motor II 7, the motor I6 drives an inner sleeve 18 to rotate through belt wheel transmission, the motor II 7 drives an outer sleeve 15 to rotate through belt wheel transmission, and the rotating directions of the outer sleeve 15 and the inner sleeve 18 are opposite.
The motor I6 and the motor II 7 are speed reducing motors, the rotating speed of the outer sleeve 15 is 500r/min, and the rotating speed of the inner sleeve 18 is 1000 r/min.
The conveying device comprises an air compressor 5, a feeding hopper 2, a flow regulating valve 3, a pressure regulating valve 4, a feeding pipe 19 and a spiral nozzle 16; an output pipeline of the air compressor 5 is connected with a feeding pipe 19, a feeding hopper 2 communicated with the feeding pipe 19 is arranged near the connection position, the other end of the feeding pipe 19 penetrates through a hollow shaft of an outer sleeve to be provided with a spiral nozzle 16, and the flow regulating valve 3 and the pressure regulating valve 4 are both arranged between an air outlet of the air compressor and the feeding hopper.
The bottom of the collecting cylinder 13 is arranged in a funnel shape, and the inclination angle of the sector of the funnel is 35 degrees.
The filter screens 17 are arranged in an interval connection mode, the filter screens are arranged on the left layer and the right layer of the upper portion of the inner sleeve at intervals of 5cm, the opening rate is 50%, circular screen holes are adopted, and the size of each screen hole is 1.2-1.3 times of that of the required material.
The flow regulating valve 3 and the pressure regulating valve 4 are fixedly arranged on the workbench 1-1, so that the stable and smooth air path is ensured.
A protective shell 14 is arranged outside the outer sleeve 15.
The invention has the beneficial effects that: because the gravity of the coarse powder and the gravity of the fine powder are different, the centrifugal force is utilized to form primary inner and outer coarse layering, then the negative pressure adsorption is utilized to force the fine powder to pass through a filter screen to form screening, the coarse powder and the fine powder are thoroughly separated, two-stage separation is formed, the separation means is simple and reliable, and the separation efficiency is high.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view of fig. 1.
In the figure: 1-1 is a control console, 1-2 is a workbench, 2 is a feeding hopper, 3 is a flow control valve, 4 is a pressure control valve, 5 is an air compressor, 6 is a motor I, 7 is a motor II, 8 is a negative pressure fan, 9 is a fine powder collecting chamber, 10 is a coarse powder collecting chamber, 11 is a coarse powder outlet, 12 is a fine powder outlet, 13 is a collecting cylinder, 14 is a protective shell, 15 is an outer sleeve, 16 is a spiral nozzle, 17 is a filter screen, 18 is an inner sleeve, and 19 is a feeding pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the embodiment 1, the invention comprises a power device, a conveying device, a grading device, a negative pressure fan 8, a fine powder collecting chamber 9, a coarse powder collecting chamber 10 and a workbench 1-2, wherein the grading device is fixed on the workbench 1-2 and comprises a collecting cylinder 13, an outer sleeve 15, a filter screen 17 and an inner sleeve 18, the outer sleeve 15 is sleeved in the collecting cylinder 13, the inner sleeve 18 is sleeved in the outer sleeve 15, the filter screen 17 is sleeved on the inner sleeve 18, the conveying device is communicated with the outer sleeve 15, an outlet is formed in the bottom of the outer sleeve 15 and communicated with the collecting cylinder 13, the collecting cylinder 13 is communicated with the coarse powder collecting chamber 10, the bottom of the inner sleeve 18 is communicated with the fine powder collecting chamber 9 through a hollow shaft, the fine powder collecting chamber 9 is communicated with an air inlet of the negative pressure fan. The power device comprises a motor I6 and a motor II 7, the motor I6 drives an inner sleeve 18 to rotate through a belt wheel I6-1 and a belt 6-2, the motor II 7 drives an outer sleeve 15 to rotate through a belt wheel II 7-1 and a belt II 7-2, and the rotating directions of the outer sleeve 15 and the inner sleeve 18 are opposite. The motor I6 and the motor II 7 are speed reducing motors, the rotating speed of the outer sleeve 15 is 500r/min, and the rotating speed of the inner sleeve 18 is 1000 r/min. See fig. 1-2.
Example 2, the inner sleeve 18 is a conical cylinder with a taper of 0.5 to 0.6. Referring to fig. 1 to 2, the rest is the same as embodiment 1.
Embodiment 3, the conveying device comprises an air compressor 5, a feeding hopper 2, a flow regulating valve 3, a pressure regulating valve 4, a feeding pipe 19 and a spiral nozzle 16; an output pipeline of the air compressor 5 is connected with a feeding pipe 19, a feeding hopper 2 communicated with the feeding pipe 19 is arranged near the connection position, the other end of the feeding pipe 19 penetrates through a hollow shaft of an outer sleeve to be provided with a spiral nozzle 16, and the flow regulating valve 3 and the pressure regulating valve 4 are both arranged between an air outlet of the air compressor and the feeding hopper. Referring to fig. 1-2, the rest is the same as the above embodiment.
In embodiment 4, the bottom of the collecting cylinder 13 is arranged in a funnel shape, and the inclination angle of the sector of the funnel is 35 degrees. Referring to fig. 1-2, the rest is the same as the above embodiment.
In the embodiment 5, the filter screens 17 are arranged in a spaced connection mode, the filter screens are respectively arranged on the left layer and the right layer at the upper part of the inner sleeve at intervals of 5cm, the opening rate is 50 percent, circular sieve holes are adopted, and the size of each sieve hole is 1.2-1.3 times of the size of the required material. Referring to fig. 1-2, the rest is the same as the above embodiment.
In embodiment 6, the flow regulating valve 3 and the pressure regulating valve 4 are fixedly arranged on the workbench 1-1, so as to ensure stable and smooth gas path. Referring to fig. 1-2, the rest is the same as the above embodiment.
In embodiment 7, the protective casing 14 is arranged outside the outer sleeve 15. Referring to fig. 1-2, the rest is the same as the above embodiment.
With reference to fig. 1 and 2, the working principle of the invention is as follows:
the invention relates to a vertical high-precision continuously-operated grading device, which adopts a negative pressure adsorption centrifugal grading mode and can be used for grading sepiolite ore powder. The air compressor is used as the airflow output device of the device, the output compressed air is sprayed out from the spiral nozzle to form jet flow, the pressure and the flow rate of the airflow are controlled by the pressure regulating valve and the flow regulating valve, and the air pressure range is controlled to beThe flow rate control range is. The sepiolite ore powder can enter the feeding pipe from the feeding hopper, and is fully mixed with compressed air and then sprayed out from the spiral nozzle.
The separation mechanism of the centrifugal classification apparatus is divided into two stages. The mineral powder after the first-stage separation and the compressed air are fully mixed enters a classification area at a certain speed, and the airflow speed is reduced (about 4m/s) due to the sudden increase of the sectional area, so that the large particles are subjected to gravity settling. The material is continuously introduced into the outer sleeve by the spiral nozzle, the outer sleeve is a cylindrical composite cylinder, two ends of the outer sleeve are supported on the workbench by bearings, the motor is driven by the belt pulley to rotate at a high speed, and under the acceleration action of a centrifugal force field, larger sepiolite particles are deposited on the wall of the outer sleeve to form a material layer outside the outer wall; the outer sleeve and the inner sleeve reversely rotate at high speed at a certain differential speed, large particles are thrown out to the periphery under the action of sedimentation and centrifugal inertia force due to the centrifugal action of the rotary drum, thicker particles quickly collide with the inner wall of the outer sleeve and slide down along the wall after losing speed, the outer sleeve continuously pushes solid-phase substances on the ring wall surface to the outlet at the bottom end of the outer sleeve and is discharged out of the outer sleeve through the discharge port, the large particles are separated out near the outlet of the inner wall of the lower part of the outer sleeve and enter an external collecting cylinder, and the large particles are sedimentated to the bottom of the cylinder under the action of gravity and fall into a collecting bag of a coarse powder collecting chamber under the.
The second stage of classification is the common influence of three factors of centrifugal classification and screening matched with negative pressure adsorption. The inner skleeve is the compound barrel of conical, and the bearing support is on the workstation for the lower extreme, and the motor passes through the belt pulley and drives to make it high-speed gyration, and the filter screen adopts three-layer interval connected mode to place hierarchical screen cloth (mesh diameter 3 microns), and the percent opening is 50%, adopts circular sieve mesh: is 1.2-1.3 times of the material size. The inner sleeve is connected with the bottom fine powder collecting chamber through a hollow shaft, four groups of centrifugal fans are symmetrically arranged around the fine powder collecting chamber, and the inner part of the inner sleeve is provided with a negative pressure fanThe negative pressure of (2). The small particles are less under the action of centrifugal force, friction force and material gravity, the small particles leave the spiral nozzle from jet flow and are changed from linear motion to spiral flow motion which descends spirally along the sieve wall, and the lifting force caused by the spiral flow motion overcomes the influence of self gravity to move upwards. Large granule material is because of weight is big, it is also big to receive centrifugal force, so it forms outer material layer to paste outer sleeve rotation, the gas-solid mixture flow of fine particle then takes place the deflection of different degrees and forms the inlayer, the inlayer is equallyd divide and is do spiral upwards or decurrent flow, receive the filter type screening of screen cloth at the vertical middle part of inner sleeve, screen cloth surface negative pressure difference adsorption, the influence of three kinds of factors of wind pressure that inner sleeve counter-rotation "Bernoulli effect" brought, collect the fine particle that will gather at the central flow through the pressure differential inside and outside the screen cloth of inner sleeve surface and get into the inner sleeve through the screening mode, in the inner sleeve, the fine particle falls into the fine powder collection room by gravity settling and.
Claims (8)
1. A centrifugal classifier for gas-solid mixed ultrafine powder is characterized in that: it comprises a power device, a conveying device, a grading device, a negative pressure fan (8), a fine powder collecting chamber (9), a coarse powder collecting chamber (10) and a workbench (1-2), wherein the grading device is fixed on the workbench (1-2), the grading device comprises a collecting cylinder (13), an outer cylinder (15), a filter screen (17) and an inner cylinder (18), the outer cylinder (15) is sleeved in the collecting cylinder (13), the inner cylinder (18) is sleeved in the outer cylinder (15), the filter screen (17) is sleeved on the inner cylinder (18), the conveying device is communicated with the outer cylinder (15), an outlet is arranged at the bottom of the outer cylinder (15) and is communicated with the collecting cylinder (13), the collecting cylinder (13) is communicated with the coarse powder collecting chamber (10), the bottom of the inner cylinder (18) is communicated with the fine powder collecting chamber (9) through a hollow shaft, the fine powder collecting chamber (9) is, the outer sleeve (15) and the inner sleeve (18) are respectively driven by a power device to rotate.
2. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the inner sleeve (18) is a conical cylinder with the taper of 0.5-0.6.
3. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the power device comprises a motor I (6) and a motor II (7), the motor I (6) drives an inner sleeve (18) to rotate through belt wheel transmission, the motor II (7) drives an outer sleeve (15) to rotate through belt wheel transmission, and the rotating directions of the outer sleeve (15) and the inner sleeve (18) are opposite.
4. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 3, characterized in that: the motor I (6) and the motor II (7) are speed reducing motors, the rotating speed of the outer sleeve (15) is 500r/min, and the rotating speed of the inner sleeve (18) is 1000 r/min.
5. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the conveying device comprises an air compressor (5), a feeding hopper (2), a flow regulating valve (3), a pressure regulating valve (4), a feeding pipe (19) and a spiral nozzle (16); an output pipeline of the air compressor (5) is connected with a feeding pipe (19), a feeding hopper (2) communicated with the feeding pipe (19) is arranged near the joint, the other end of the feeding pipe (19) penetrates through a hollow shaft of an outer sleeve to be provided with a spiral nozzle (16), and the flow regulating valve (3) and the pressure regulating valve (4) are both arranged between an air outlet of the air compressor and the feeding hopper.
6. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the bottom of the collecting cylinder (13) is arranged into a funnel shape, and the inclination angle of the sector of the funnel is 35 degrees.
7. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the filter screens (17) are placed in an interval connection mode, the filter screens are arranged on the left layer and the right layer of the upper portion of the inner sleeve at intervals of 5cm, the opening rate is 50%, circular screen holes are adopted, and the size of each screen hole is 1.2-1.3 times of the size of the required material.
8. A gas-solid hybrid ultrafine powder centrifugal classifier according to claim 1, characterized in that: the flow regulating valve (3) and the pressure regulating valve (4) are fixedly arranged on the workbench (1-1), so that the stability and smoothness of the gas circuit are ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916941.2A CN110624700A (en) | 2019-09-26 | 2019-09-26 | Centrifugal classifier for gas-solid mixed ultrafine powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916941.2A CN110624700A (en) | 2019-09-26 | 2019-09-26 | Centrifugal classifier for gas-solid mixed ultrafine powder |
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| Publication Number | Publication Date |
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| CN110624700A true CN110624700A (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910916941.2A Pending CN110624700A (en) | 2019-09-26 | 2019-09-26 | Centrifugal classifier for gas-solid mixed ultrafine powder |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206907A (en) * | 2020-12-09 | 2021-01-12 | 湘潭大学 | Sepiolite ore powder grinding and grading method based on negative pressure screening |
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| CN200974043Y (en) * | 2006-11-23 | 2007-11-14 | 国家纳米技术与工程研究院 | Centrifugal classifier for classifying nanometer-grade grains |
| JP2010149090A (en) * | 2008-12-26 | 2010-07-08 | Nippon Pneumatic Mfg Co Ltd | Air flow classifier |
| CN201676755U (en) * | 2010-04-14 | 2010-12-22 | 洛阳博丹机电科技有限责任公司 | Centrifugal grader with scattering multi-sectioned grading function |
| CN205518631U (en) * | 2016-04-22 | 2016-08-31 | 河南欣欣粮油设备有限公司 | Centrifugal classifier |
| CN108160479A (en) * | 2018-01-23 | 2018-06-15 | 湘潭大学 | A kind of ultra-fine grain grading plant based on wall attachment effect |
| CN108176148A (en) * | 2018-01-23 | 2018-06-19 | 湘潭大学 | A kind of circulation type powder filter device and filter method based on Bernoulli effect |
| CN109530234A (en) * | 2018-12-03 | 2019-03-29 | 河北科技大学 | The cyclone classified sieve of three product of micron order |
-
2019
- 2019-09-26 CN CN201910916941.2A patent/CN110624700A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200974043Y (en) * | 2006-11-23 | 2007-11-14 | 国家纳米技术与工程研究院 | Centrifugal classifier for classifying nanometer-grade grains |
| JP2010149090A (en) * | 2008-12-26 | 2010-07-08 | Nippon Pneumatic Mfg Co Ltd | Air flow classifier |
| CN201676755U (en) * | 2010-04-14 | 2010-12-22 | 洛阳博丹机电科技有限责任公司 | Centrifugal grader with scattering multi-sectioned grading function |
| CN205518631U (en) * | 2016-04-22 | 2016-08-31 | 河南欣欣粮油设备有限公司 | Centrifugal classifier |
| CN108160479A (en) * | 2018-01-23 | 2018-06-15 | 湘潭大学 | A kind of ultra-fine grain grading plant based on wall attachment effect |
| CN108176148A (en) * | 2018-01-23 | 2018-06-19 | 湘潭大学 | A kind of circulation type powder filter device and filter method based on Bernoulli effect |
| CN109530234A (en) * | 2018-12-03 | 2019-03-29 | 河北科技大学 | The cyclone classified sieve of three product of micron order |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206907A (en) * | 2020-12-09 | 2021-01-12 | 湘潭大学 | Sepiolite ore powder grinding and grading method based on negative pressure screening |
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Application publication date: 20191231 |