CN110882865A - Atmosphere grading device for deep submicron powder - Google Patents
Atmosphere grading device for deep submicron powder Download PDFInfo
- Publication number
- CN110882865A CN110882865A CN201911141435.7A CN201911141435A CN110882865A CN 110882865 A CN110882865 A CN 110882865A CN 201911141435 A CN201911141435 A CN 201911141435A CN 110882865 A CN110882865 A CN 110882865A
- Authority
- CN
- China
- Prior art keywords
- powder
- atmosphere
- tank
- air
- grading
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 88
- 238000000926 separation method Methods 0.000 claims abstract description 47
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 238000012216 screening Methods 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 11
- 238000007664 blowing Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 24
- 239000000428 dust Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 6
- 239000011362 coarse particle Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000010332 dry classification Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010333 wet classification Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
- B04C2009/002—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks with external filters
Landscapes
- Cyclones (AREA)
Abstract
The invention discloses a deep submicron powder atmosphere grading device, which relates to the technical field of powder material grading, and adopts the technical scheme that the device comprises a feeder, an atmosphere box, a feed hopper, a separation cone, a separation chamber, a porous flange, a guide disc, a fine powder outlet pipe, a bottom tank, a coarse powder collecting barrel, a cyclone separator, a separation collecting tank, a back blowing collecting tank, an induced draft fan, a cooler and a buffer tank. The invention has the effects of effectively avoiding the short circuit phenomenon of airflow, recycling the nitrogen, adjusting the pressure of the nitrogen in the grading system through the nitrogen amount of the return air pipeline and the buffer tank, enabling the air pressure to be in a micro-positive pressure state, further effectively preventing the air from permeating, avoiding the contact of the grading material and the air, and enabling the whole system to be in an air isolating state; meanwhile, the oxidation effect of moisture and oxygen in the air in the traditional gas phase grading process on the grading materials is avoided, and the method can be used for the atmosphere grading effect of the easily oxidized deep submicron-order ultrafine metal powder such as nickel powder, copper powder and aluminum powder.
Description
Technical Field
The invention relates to the technical field of powder material grading, in particular to a deep submicron powder atmosphere grading device.
Background
The fineness requirement of mineral materials becomes higher and higher along with the development of new technology of modern industry, and the requirement on the granularity range of products becomes narrower and narrower, so that the classification of the materials becomes a key technology for the expanded application of powder materials.
The classification method commonly used for the powder comprises two main types of wet classification and dry classification.
In the wet classification method, two media are commonly used, namely alcohol and water, which have the advantages that the product with fine granularity can be obtained, the granularity distribution range of the product can be controlled to be narrow, but the method has the following disadvantages: 1. when the final finished product is required to be in a dry state, the finished product must be dried and subjected to agglomeration prevention treatment, so that the process is complex, the energy consumption is high, and the efficiency is low; 2. when an alcohol flammable liquid-phase medium is used, the feed liquid rubs with the impeller and the pipe wall at a high speed under the action of the high-pressure pump, so that the temperature is rapidly increased, the alcohol concentration in the air of the production environment is increased, and potential safety hazards exist; 3. when water is used as a medium, the powder can generate electrochemical reaction with the water, so that the powder has oxidation and corrosion phenomena, and the quality of the powder is seriously influenced.
In the dry classification method, the advantages are that the classified product does not need to be subjected to post-treatment such as drying, redispersion and the like, so compared with the wet classification method, the dry classification method has the effects of lower energy consumption and simple and convenient operation, and the operation principle is as follows: the powder body generates certain kinetic energy when moving through the inertia principle, when the moving speed is the same, the kinetic energy, namely the moving inertia, of the powder body with large mass is large, and when the powder body is subjected to the acting force for changing the moving direction of the powder body, different moving tracks can be formed due to the difference of the inertia, so that the classification of large and small particles is realized.
In the prior art, an air classifier is generally used as a fine powder classifying apparatus. The grading device generally uses an airflow dispersion phase as a carrier, drives the powder to rotate and form eddy motion, so that particles are simultaneously subjected to the action of centrifugal force F and resistance force F, and when F is greater than F, the particles fly out and collide the wall of a machine body to fall down, and then are captured in a specific mode to obtain coarse powder; when F is less than F, the particles fly to the center of the vortex and fly out along with the airflow, and fine powder is collected by a cyclone dust collector or a bag filter, so that the purpose of classification is achieved.
However, because the flow field in the cyclone separator is complex, the pressure gradient caused by the cyclone motion will generate secondary flow on the inner wall of the separator, and then the annular dust ring formed by the particles circling around the top plate of the separator will appear. When the particles are too much aggregated, they will escape from the exhaust pipe, affecting the separation efficiency. On the other hand, prolonged "ringing" of the particles will wear the walls. And the flow near the top plate will cause the airflow to flow down the outer wall of the exhaust pipe, causing the radial velocity at the end of the exhaust pipe to increase, and the airflow with dust is discharged from the exhaust pipe, forming a "short-circuit flow" at the end of the exhaust pipe. And because the dust carried by the 'short-circuit flow' is increased, the separation efficiency of the separator is reduced, the 'dust back-mixing' downstream airflow at the dust discharge port discharges the particles separated to the wall surface into the dust hopper, and the separated dust is entrained before returning to the separator, and the separation efficiency of the separator is reduced as the number of the back-mixed particles is increased. When the dust is seriously back-mixed, the number of the back-mixed particles accounts for 5-10% of the separated particles, the separation efficiency of the particles is seriously influenced, and improvement is needed.
Disclosure of Invention
In view of the disadvantages of the prior art, an object of the present invention is to provide a deep submicron powder atmosphere classification device having effects of preventing the particle size of powder particles from being non-uniform and the classification efficiency from being lowered due to back-mixing of particles.
In order to achieve the purpose, the invention provides the following technical scheme:
a dark submicron order powder atmosphere grading plant, includes the atmosphere case and from last to fixing in proper order feeder and the feeder hopper in the atmosphere case down, the lower extreme of feeder hopper has connected gradually back taper separating chamber and bottom jar, the junction inboard of separating chamber and bottom jar is provided with porous flange, and is provided with separation awl and back taper guiding disc that are located in the separating chamber below the feeder hopper discharge end, be provided with the fine powder play powder pipe that is located in the bottom jar of guiding disc lower extreme, the axis of the discharge end of feeder hopper, separation awl and guiding disc all with the axis coincidence of separating chamber, still includes blowback jar and draught fan, the fine powder play powder pipe's bottom is connected with the other end and wears out from the bottom jar and with the sealed pipeline of blowback jar's upper end lateral wall intercommunication, the top of blowback jar with the draught fan is through setting up induced air inlet pipeline connection, the air outlet of draught fan is provided with induced air outlet pipeline, induced air outlet pipeline has connected gradually the cooler and fills the buffer tank into nitrogen gas, the buffer tank be provided with the buffering air outlet pipeline of atmosphere case intercommunication, buffering air outlet pipeline is connected with the return air pipeline of being connected with the induced air inlet line.
By adopting the technical scheme, the separation cone is fixed in the middle of the upper end of the inverted cone-shaped separation chamber, so that powder enters the separation chamber from the feeding machine and is dispersed through the separation cone, then the powder is in downward movement under the action of airflow, coarse particles are separated in the separation chamber at an accelerated speed due to the movement towards the edge of the guide disc, and then the coarse particles are brought to the top of the separation cone by the upward moving airflow and are in downward centrifugal movement again, and after repeated separation for many times, most of the coarse particles move to the bottom of the bottom tank under the action of the guide disc for precipitation, and finer particles enter the back flushing tank along with the central airflow through the fine powder outlet pipe, thereby effectively avoiding the phenomenon of short circuit of the airflow; meanwhile, nitrogen enters the device system through the buffer tank, gas discharged by the induced draft fan flows back to the buffer tank after being cooled, all gas fed into the atmosphere box is the nitrogen after flowing back, and the nitrogen is recycled; and the pressure of nitrogen in the grading system is adjusted through the nitrogen amount of the air return pipeline and the buffer tank, so that the air pressure is in a micro-positive pressure state, and the air can be effectively prevented from permeating, thereby avoiding the contact of the grading material and the air, ensuring that the whole system is in an air-isolated state, avoiding the traditional gas phase grading process, and avoiding the oxidation effect of moisture and oxygen in the air on the grading material, so that the grading system can be used for atmosphere grading of easily oxidized deep submicron-order ultrafine metal powder such as nickel powder, copper powder, aluminum powder and the like.
The invention is further configured to: the powder screening device is characterized by further comprising a cyclone separator, wherein the sealing pipeline comprises a primary screening powder outlet pipeline communicated with the fine powder outlet pipe and the side wall of the upper end of the cyclone separator, and a secondary screening powder outlet pipeline communicated with the top of the cyclone separator and the side wall of the upper end of the back flushing tank.
By adopting the technical scheme, the cyclone separator is used for further dispersing the powder in the separation chamber after primary separation, so that the particle size of the powder collected in the back flushing tank is smaller, and the grading efficiency is improved.
The invention is further configured to: the bottom of the bottom tank, the cyclone separator and the back flushing tank are respectively provided with a corresponding coarse powder collecting barrel, a separation collecting tank and a back flushing collecting tank.
Through adopting above-mentioned technical scheme, middlings collecting vessel, separation and collection jar and blowback collecting vessel play the granule of collecting corresponding particle diameter respectively, are convenient for subside the recovery and the utilization of granule.
The invention is further configured to: the porous flange is provided with a plurality of air inlets distributed in an equal radian along the radial direction.
By adopting the technical scheme, the uniform air intake of nitrogen is ensured, the resistance of air flow is reduced, the kinetic energy of the air flow is increased, and then the dispersion performance of powder is obviously improved.
The invention is further configured to: the number of the air inlet holes is 24, the cross section of each air inlet hole is circular, and the inner diameter of each air inlet hole is 5-10 mm.
Through adopting above-mentioned technical scheme, guarantee that the feeding is even, and reach the effect of effectively avoiding phenomenons such as "top ash ring", "short circuit flow", "dust backmixing" to take place behind the air current through porous flange, improve the classification efficiency of powder.
The invention is further configured to: the bottom of the atmosphere box is hermetically connected with a bottom support ring, and the bottom support ring is hermetically fixed on the outer side of the bottom tank.
By adopting the technical scheme and the sealing device, the device is in an anaerobic state during operation, and the oxidation effect of moisture and oxygen in the air on the classified materials in the classification process is effectively reduced.
The invention is further configured to: and the side wall of the atmosphere box is hermetically connected with transparent glass and a nitrogen pressure gauge.
Through adopting above-mentioned technical scheme, be convenient for observe the unloading condition of powder, carry out effective control to system's pressure, prevent that too big to cause unnecessary damage to the device of pressure.
The invention is further configured to: the buffer tank is provided with a thermometer, a pressure gauge and a pressure release valve.
Through adopting above-mentioned technical scheme, the state of thermometer and manometer in time reflection system, when buffer tank pressure is great, can follow the relief valve and relieve the pressure, improved the security performance of device operation.
In conclusion, the invention has the following beneficial effects:
1. the method is suitable for the precision grading of submicron-grade superfine powder with the particle size of less than 2.0 mu m;
2. the method is suitable for grading spherical powder;
3. the method is suitable for the deep submicron metal powder and the nonmetal powder which are easy to oxidize and wet, and has high separation efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present embodiment.
Description of reference numerals: 1. a feeder; 2. an atmosphere box; 3. a feed hopper; 4. separating cone; 5. a separation chamber; 6. a porous flange; 7. a guide plate; 8. fine powder discharging pipe; 9. a bottom tank; 10. a coarse powder receiving barrel; 11. a cyclone separator; 111. a separation and collection tank; 12. a blowback tank; 121. a back-flushing collection tank; 13. an induced draft fan; 14. a cooler; 15. a buffer tank; 161. an induced air outlet pipeline; 162. buffering the air outlet pipeline; 163. a return air line; 164. an induced air inlet pipeline; 165. primarily screening out a powder pipeline; 166. and a secondary screening powder outlet pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1, the atmosphere grading device for submicron-order powder comprises an atmosphere box 2, and a feeder 1 and a feed hopper 3 which are fixed in the atmosphere box 2 from top to bottom in sequence. The feeder 1 feeds the powder material into the atmosphere box 2, and then the powder material falls into the feed hopper 3 to perform subsequent separation operation.
The lower end of the feed hopper 3 is connected with an inverted cone-shaped separation chamber 5 and a bottom tank 9 in sequence. A porous flange 6 for communicating the atmosphere box 2 with the bottom tank 9 is arranged on the inner side of the joint of the separation chamber 5 and the bottom tank 9, and a separation cone 4 and an inverted cone-shaped guide disc 7 which are positioned below the discharge end of the feed hopper 3 are arranged in the separation chamber 5. A fine powder outlet pipe 8 positioned at the lower end of the guide disc 7 is arranged in the bottom tank 9. The axes of the discharge end of the feed hopper 3, the separating cone 4 and the guide disc 7 all coincide with the axis of the separating chamber 5. It should be mentioned that the device also includes a cyclone separator 11, a blowback tank 12 and an induced draft fan 13 which are communicated in sequence. The bottom of the fine powder outlet pipe 8 is connected with a primary screening powder outlet pipeline 165 the other end of which penetrates out of the bottom tank 9 and is communicated with the side wall of the upper end of the cyclone separator 11; a secondary screening powder outlet pipeline 166 with two ends respectively communicated with the top end of the cyclone separator 11 and the side wall of the upper end of the back blowing tank 12 is arranged between the cyclone separator 11 and the back blowing tank 12. Meanwhile, an induced draft air inlet pipe 164 for communicating with the induced draft fan 13 is provided at the top end of the blowback tank 12. And the air outlet of the induced draft fan 13 is provided with an induced draft air outlet pipeline 161, and the induced draft air outlet pipeline 161 is sequentially connected with a cooler 14 and a buffer tank 15 for filling nitrogen into the equipment. The buffer tank 15 is provided with a buffer air-out pipe 162 communicating with the atmosphere box 2, and the buffer air-out pipe 162 is connected with an air return pipe 163 connected with an induced air intake pipe 164. By fixing the separation cone 4 in the middle of the upper end of the inverted cone-shaped separation chamber 5, the powder enters the separation chamber 5 from the feeder 1 and is dispersed by the separation cone 4, then the powder is centrifugally moved downwards under the action of the airflow, and the coarse particles are accelerated and separated in the separation chamber 5 due to the movement towards the edge of the guide disc 7, then the coarse particles are brought to the top of the separation cone 4 by the upward moving airflow and are centrifugally moved downwards again, and after repeated separation for many times, most of the coarse particles are moved to the bottom of the bottom tank 9 under the action of the guide disc 7 to be precipitated, and the finer particles enter the cyclone separator 11 along with the central airflow through the fine powder outlet pipe 8, so that the cyclone separator 11 plays a role in further dispersing the powder in the separation chamber 5 after primary separation, and the particle size of the powder collected in the back-blowing tank 12 is smaller, the effect of improving the classification efficiency is achieved. When the classified powder enters the back-blowing tank 12 through the secondary screening powder outlet pipeline 166, the phenomenon of short circuit of airflow is effectively avoided; meanwhile, nitrogen enters the device system through the buffer tank 15, gas exhausted by the induced draft fan 13 flows back to the buffer tank 15 after being cooled, all air intake of the atmosphere box 2 is the nitrogen after flowing back, and the nitrogen is recycled; and the pressure of nitrogen gas in the grading system is adjusted when the amount of nitrogen gas passes through the return air pipeline 163 and the buffer tank 15, so that the air pressure is in a micro-positive pressure state, and the air can be effectively prevented from permeating, thereby avoiding the contact of the grading material and the air, ensuring that the whole system is in an air-isolated state, avoiding the traditional gas phase grading process, ensuring that the moisture and the oxygen in the air have oxidation effect on the grading material, and being used for atmosphere grading of easily oxidized deep submicron-order ultrafine metal powder such as nickel powder, copper powder, aluminum powder and the like.
As shown in fig. 1, a coarse powder collecting barrel 10, a separation collecting tank 111 and a blowback collecting tank 121 are respectively arranged at the bottoms of the bottom tank 9, the cyclone 11 and the blowback tank 12. The coarse powder collecting barrel 10, the separation collecting tank 111 and the back-blowing collecting tank 121 respectively collect particles with corresponding particle sizes, so that the recovery and utilization of settled particles are facilitated. It should be noted that the porous flange 6 is provided with a plurality of air inlets distributed in an equal radian along the radial direction, so that the air inlets play a role of uniformly filling nitrogen into the separation chamber 5 and the bottom tank 9, thereby reducing resistance to airflow, increasing kinetic energy of the airflow, and further significantly improving the dispersibility of the powder. Meanwhile, the number of the intake holes may be 1 to 36, and in the present embodiment, the number of the intake holes is set to 24. The cross section of the air inlet is circular, the inner diameter is 5-10mm, the uniform feeding of the powder is ensured, the phenomena of dust ring ejection, short-circuit flow, dust back mixing and the like are effectively avoided after the air flow passes through the porous flange 6, and the grading efficiency of the powder is improved.
The bottom of the atmosphere box 2 is hermetically connected with a bottom support ring. The bottom support ring is fixed on the outer side of the bottom tank 9 in a sealing mode, so that the purpose of stably and hermetically connecting the atmosphere box 2 with the bottom tank 9 is achieved, the device is in an oxygen-free state during operation while an effective sealing device is used, and the oxidation effect of moisture and oxygen in air on the classified materials in the classification process is effectively reduced. Still sealing connection has clear glass and nitrogen gas manometer on the lateral wall of atmosphere case 2, sees through the unloading condition that clear glass will be convenient for observe the powder to carry out effective control to system pressure under the condition that combines nitrogen gas manometer, prevent that too big to cause unnecessary damage to the device of pressure. In order to further improve the operation safety of the device, a thermometer, a pressure gauge and a pressure relief valve are further arranged on the buffer tank 15. The thermometer and the pressure gauge reflect the state of the system in time, and when the pressure of the buffer tank 15 is large, the pressure can be released from the pressure release valve, so that the purpose of further controlling the stability of the internal pressure of the device is achieved.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the present invention may occur to those skilled in the art without departing from the principle of the present invention, and such modifications and embellishments should also be considered as within the scope of the present invention.
Claims (8)
1. An atmosphere grading device for deep submicron powder comprises an atmosphere box (2), and a feeder (1) and a feed hopper (3) which are sequentially fixed in the atmosphere box (2) from top to bottom, the lower end of the feed hopper (3) is sequentially connected with an inverted cone-shaped separation chamber (5) and a bottom tank (9), a porous flange (6) is arranged on the inner side of the joint of the separation chamber (5) and the bottom tank (9), a separation cone (4) and an inverted cone-shaped guide disc (7) which are positioned below the discharge end of the feed hopper (3) are arranged in the separation chamber (5), a fine powder outlet pipe (8) positioned at the lower end of the guide disc (7) is arranged in the bottom tank (9), the axis of the discharge end of feeder hopper (3), separation awl (4) and deflector (7) all with the axis coincidence of separation chamber (5), its characterized in that: still include blowback jar (12) and draught fan (13), the bottom that the fine powder goes out powder pipe (8) is connected with the other end and follows wear out in bottom jar (9) and with the sealed pipeline of the upper end lateral wall intercommunication of blowback jar (12), the top of blowback jar (12) with draught fan (13) are connected through setting up induced air inlet pipeline (164), the air outlet of draught fan (13) is provided with induced air outlet pipeline (161), induced air outlet pipeline (161) have connected gradually cooler (14) and buffer tank (15) that fill into nitrogen gas, buffer tank (15) be provided with the buffering outlet pipeline (162) of atmosphere case (2) intercommunication, buffering outlet pipeline (162) are connected with return air pipeline (163) be connected with induced air inlet pipeline (164).
2. The atmosphere classification device for deep submicron powder according to claim 1, characterized in that: the powder screening device is characterized by further comprising a cyclone separator (11), wherein the sealing pipeline comprises a primary screening powder outlet pipeline (165) for communicating the fine powder outlet pipe (8) with the side wall of the upper end of the cyclone separator (11) and a secondary screening powder outlet pipeline (166) for communicating the top of the cyclone separator (11) with the side wall of the upper end of the back flushing tank (12).
3. The atmosphere classification device for deep submicron powder according to claim 2, characterized in that: the bottom of the bottom tank (9), the bottom of the cyclone separator (11) and the bottom of the back flushing tank (12) are respectively provided with a corresponding coarse powder collecting barrel (10), a separation collecting tank (111) and a back flushing collecting tank (121).
4. The atmosphere classification device for deep submicron powder according to claim 1, characterized in that: the porous flange (6) is provided with a plurality of air inlets distributed in an equal radian along the radial direction.
5. The atmosphere classification device for deep submicron powder according to claim 4, characterized in that: the number of the air inlet holes is 24, the cross section of each air inlet hole is circular, and the inner diameter of each air inlet hole is 5-10 mm.
6. The atmosphere classification device for deep submicron powder according to claim 1, characterized in that: the bottom of the atmosphere box (2) is hermetically connected with a bottom support ring, and the bottom support ring is hermetically fixed on the outer side of the bottom tank (9).
7. The atmosphere classification device for deep submicron powder according to claim 6, characterized in that: the side wall of the atmosphere box (2) is hermetically connected with transparent glass and a nitrogen pressure gauge.
8. The atmosphere classification device for deep submicron powder according to claim 1, characterized in that: the buffer tank (15) is provided with a thermometer, a pressure gauge and a pressure release valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141435.7A CN110882865A (en) | 2019-11-20 | 2019-11-20 | Atmosphere grading device for deep submicron powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141435.7A CN110882865A (en) | 2019-11-20 | 2019-11-20 | Atmosphere grading device for deep submicron powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110882865A true CN110882865A (en) | 2020-03-17 |
Family
ID=69748087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911141435.7A Pending CN110882865A (en) | 2019-11-20 | 2019-11-20 | Atmosphere grading device for deep submicron powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110882865A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112439558A (en) * | 2020-12-03 | 2021-03-05 | 宁波广新纳米材料有限公司 | Superfine powder gas-phase classification equipment |
| WO2022134687A1 (en) * | 2020-12-23 | 2022-06-30 | 江苏博迁新材料股份有限公司 | Gas-phase powder grading device |
| CN115069169A (en) * | 2022-05-27 | 2022-09-20 | 湖北丹澳药业有限公司 | Preparation device and preparation method of 17 alpha-hydroxyprogesterone |
| CN117414958A (en) * | 2023-12-18 | 2024-01-19 | 河南省远洋粉体科技股份有限公司 | Aluminum powder cyclone grading device |
| CN117516996A (en) * | 2023-11-07 | 2024-02-06 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
| CN117516996B (en) * | 2023-11-07 | 2024-05-28 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
-
2019
- 2019-11-20 CN CN201911141435.7A patent/CN110882865A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112439558A (en) * | 2020-12-03 | 2021-03-05 | 宁波广新纳米材料有限公司 | Superfine powder gas-phase classification equipment |
| WO2022134687A1 (en) * | 2020-12-23 | 2022-06-30 | 江苏博迁新材料股份有限公司 | Gas-phase powder grading device |
| CN115069169A (en) * | 2022-05-27 | 2022-09-20 | 湖北丹澳药业有限公司 | Preparation device and preparation method of 17 alpha-hydroxyprogesterone |
| CN117516996A (en) * | 2023-11-07 | 2024-02-06 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
| CN117516996B (en) * | 2023-11-07 | 2024-05-28 | 重庆交通大学 | Separation device and detection system for large-flow submicron particulate aerosol |
| CN117414958A (en) * | 2023-12-18 | 2024-01-19 | 河南省远洋粉体科技股份有限公司 | Aluminum powder cyclone grading device |
| CN117414958B (en) * | 2023-12-18 | 2024-03-08 | 河南省远洋粉体科技股份有限公司 | Aluminum powder cyclone grading device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110882865A (en) | Atmosphere grading device for deep submicron powder | |
| CN101318180B (en) | Hydrocarbon black powder removing method and device | |
| WO2021093255A1 (en) | External circulation roller type vertical mill | |
| US4266673A (en) | Apparatus for classifying dust materials | |
| CN106140398A (en) | Novel automatic iron discharging formula grinding disc of vertical mill and row's difficult-to-grind materials method | |
| JPH1066897A (en) | Cyclone, especially cyclone dust collector and cyclone classifier | |
| CN103752426A (en) | Online hydrocyclone regulating device based on overflow pipe | |
| US4715951A (en) | Apparatus for separating granulate material | |
| CN211563365U (en) | Atmosphere grading device for deep submicron powder | |
| CN105709944A (en) | Industrial adjustable grading steady-flow swirler | |
| JP5497443B2 (en) | Material particle size selection and / or drying equipment | |
| US5934483A (en) | Bi-chamber air classifier with coaxial ascending dispersed feed | |
| CN110215981B (en) | Stepped discharge air flow crushing, classifying and sorting device and method | |
| CN109590215B (en) | Multistage particle sorting machine | |
| CN111747629A (en) | Sludge drying treatment method and sludge drying equipment | |
| CN110976288A (en) | Energy-saving environment-friendly efficient powder concentrator | |
| CN211707116U (en) | Cyclone structure particle material rotor-free movable piece airflow classification equipment | |
| CN201283344Y (en) | Black carbon powder removing device | |
| CN112439558A (en) | Superfine powder gas-phase classification equipment | |
| CN112439559A (en) | Superfine powder gas-phase classification equipment and classification method thereof | |
| CN207857153U (en) | A kind of sand powder seperator | |
| CN219291677U (en) | Horizontal high-efficiency cyclone powder particle multistage grading separator | |
| CN116101789B (en) | Pneumatic conveying cyclone discharging device | |
| CN219525564U (en) | Pneumatic conveying cyclone discharging device | |
| CN218872863U (en) | Jet flow grading device for rare earth polishing powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |