CN1053565A - Sharp turn jet micro mist grading method and device - Google Patents
Sharp turn jet micro mist grading method and device Download PDFInfo
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- CN1053565A CN1053565A CN 90100172 CN90100172A CN1053565A CN 1053565 A CN1053565 A CN 1053565A CN 90100172 CN90100172 CN 90100172 CN 90100172 A CN90100172 A CN 90100172A CN 1053565 A CN1053565 A CN 1053565A
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- air
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- classification
- clasfficiator
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Abstract
The invention belongs to the stage division and the device of micro mist granularity.It is characterized in that, fully utilized jet deflection screening principle and cross-flow screening principle, adopted air dry method jet classifying technology and sharp turn jet air clasfficiator, have simple in structurely, production capacity is big, the classification efficiency height, non-environmental-pollution can obtain advantages such as multistage product simultaneously.Be applicable to the classification of 1～100 micron powder, especially 1～10 micron grain size scope is micro-powder graded.
Description
The present invention relates to particuology or powder technology, particularly a kind of stage division and device about the micro mist granularity.
Existing micro mist grading adopts the sedimentation of gravity classification principle mostly, carries out wet classification in the multistage subsider, this wet classification method, its equipment heaviness is huge, capital expenditure is big, and grading effect is poor, the production cost height, operate dumb, more seriously influence the raising of the product quality and the rate of recovery, and, the wet classification products obtained therefrom, also need carry out drying and handle consumed energy.
The object of the present invention is to provide a kind of simple in structurely, production capacity is big, the classification efficiency height, and non-environmental-pollution, and can obtain the dry method jet classifying method and the device of multistage product simultaneously.
The inventive method is to adopt air to carry out dry classification.At first the micro powder granule (material to be fractionated) of drying is supplied with disperser continuously and stably by feeder, in disperser, use powerful mechanical agitation and while jet airstream and suck air stream, material is carried out strength disperse.Gas-solid biphase flow after disperseing enters the sharp turn jet classifier from the reducing and expansion jet pipe of disperser.Spray at a high speed in the form of the spout place of clasfficiator gas-solid biphase flow with plane jet.Clasfficiator is divided into internal classification district and outer graded region according to jet deflection screening principle and cross-flow screening principle.In the internal classification district, feed the internal classification air-flow, the plane jet that makes the gas-solid biphase flow through disperseing along the wall deflection rapidly of the passage master locating piece in the clasfficiator, produces wall attachment effect (Coanda effect) in the internal classification district.Difference in size by centrifugal force makes the different particle of granularity carry out sizing along different orbiting motions.Littler, the easy deflection of healing of its inertia of thin particle that particle diameter is healed little or particle is directly healed.So, can obtain several strands of gas-solid biphase flows that particle diameter is thinner in the internal classification district.And the particle that does not deflect flows into outer graded region.Feed misorientation (laterally) pneumatic jig air-flow, in can making slightly and coarse granule obtain classification.By classifier go out several (as thin, in thin, in thick, thick) gas-solid biphase flow separates with cloth envelop collector and filters through cyclone separator again, can obtain products at different levels.
The used device of the inventive method comprises decentralized system, hierarchy system, separated collection system and power circulation system.Decentralized system is made of feed hopper, mechanical agitator and disperser, and hierarchy system adopts sharp turn of the present invention jet air clasfficiator, and it is that a passage master locating piece and the secondary locating piece of some passages are set in two side plates, constitutes several passages.On passage master locating piece, be provided with deflection gas flow modulation hole and pressure tap.Intake-gas from deflection gas flow modulation hole, according to the grain graininess size that the size of suction tolerance is regulated passage 1 and passage 2, pressure tap is used for measuring the static pressure of gas in the clasfficiator.Several strands of gas-solid biphase flows after internal classification air-flow, misorientation screening air-flow, the gas-solid biphase flow after disperseing and the classification enter and discharge from different passages respectively.Power circulation system comprises blower fan, air pump, cooler and conveyance conduit.Several strands of gas-solid biphase flows that classification the goes out pure air after separating, filtering are respectively used by blower fan and air pump pressurized circulation again.Whole device all is under the negative pressure to be operated, and does not therefore have dust and leaks, and has avoided the pollution of operating environment.
Below in conjunction with accompanying drawing in detail the embodiment of the invention is described in detail
Fig. 1 is device schematic diagram of the present invention (or classification flow chart)
Fig. 2 is the disperser structural representation
Fig. 3 is a sharp turn jet air clasfficiator structural representation
Fig. 4 is the cutaway view (A-A) of Fig. 3
Among Fig. 1: B is an air pump, and C is a clasfficiator, and E is a cooler, and F is a disperser, G is a feeder, and D is a mechanical agitator, and L is a roots blower, and P is a pressure gauge, R is a container, and T is a thermometer, and V is a flowmeter, I, II, III, IV are cloth envelop collectors, and 1-1,1-2,2-1,2-2,3-1,4-1 are cyclone separators, and A is a conveyance conduit, arrow is represented to flow to, and #1, #2, #3, #4 are the products that classification goes out, and #1 is thin product, #2 be in thin product, #3 be in thick product, #4 is thick product.
Among Fig. 2, disperser comprises body (12), hopper (17), and nozzle (15), compressed air is taken over (16) and reducing and expansion jet pipe (13), and a supporting plate (14) is arranged below nozzle, prevents that the solid particle delay from resulting in blockage.
Among Fig. 3, Fig. 4, clasfficiator has two side plates (10), side sheet room is provided with a passage master locating piece (8), be provided with deflection gas flow modulation hole (O) and pressure tap (H) in it, and be provided with the secondary locating pieces of six passages (8-1,8-2,8-3,8-4,8-5,8-6) and constituted 7 passages (1,2,3,4,5,6,7), passage 6 can feed internal classification air-flow (V
6), passage 5 can feed misorientation screening air-flow (V
5), passage 7 links with the reducing and expansion jet pipe of disperser, feeds the gas-solid biphase flow after disperseing.Passage 1,2 be the thin of internal classification district and in thin gas-solid biphase flow extract out mouthful, passage 3,4 be outer graded region in the extraction mouth of thick and thick gas-solid biphase flow.End at the secondary locating piece of passage (8-1,8-2,8-3) can be provided with the adjustable edge of a knife (M, N, K), regulates the angle or the position of the edge of a knife, can obtain different grain graininess.
Micro mist ceria polishing powder grading process at first starts roots blower (L) and air pump (B) as shown in Figure 1, regulates and sprays tolerance V
1With emptying tolerance V
1, make both sums reach 6～8 meters
3/ hour.Regulate internal classification gas amount V
6Reach 20～25 meters
3/ hour; Regulate the tolerance of passage 1 and passage 2, the tolerance V of passage 1
1=25～30 meters
3/ hour, the tolerance V of passage 2
2=12～15 meters
3/ hour; Regulate the tolerance of passage 3 and passage 4, the tolerance V of passage 3
3=10～15 meters
3/ hour, the tolerance V of passage 4
4=5～8 meters
3/ hour.After treating each parameter stability, start agitator (D) and feeder (G), the ceria polishing powder is by past disperser (F) hopper (13) of feeder (G) feed continuously and stably.The size of feed amount will guarantee the unimpeded suction air of disperser (F) energy, prevents that disperser (F) from being stopped up by material.The material that adds after the powerful dispersion of mechanical agitator (D), drops on the supporting plate (14) of disperser (F) as shown in Figure 2, immediately the compressed air stream V that is sprayed by the nozzle of disperser (F) (15)
1With inhaled air stream V
1Disperse, the gas-solid biphase flow after the dispersion enters the passage 7 of clasfficiator (C) as shown in Figure 3 by reducing and expansion jet pipe (13) ejection, the plane jet form of sentencing 100～200 meter per seconds at the spout (11) of clasfficiator (C) enters internal classification district (Q).This plane jet flows V at the internal classification that internal classification district (Q) is subjected to entering through passage 6
6With under the synergy of the suction airstream V1 of passage 1 and passage 2 and V2, the gas-solid biphasic mixture is along the wall deflection mobile (coanda effect) rapidly of passage master locating piece (8), utilize the difference of the centrifugal force size of variable grain granularity, carry out " screening " of internal classification system.Pump out the gas-solid biphasic mixture from passage 1 and passage 2 and enter cyclone separator 1-1 and 1-2 and cyclone separator 2-1 and 2-2 respectively.So just, at container R
1-1In obtain thin product #1, at container R
2-1In obtain in thin product #2; At container R
1-2And R
2-2Obtain respectively than #1 and the thinner product of #2.The gas-solid biphasic mixture of coming out from cyclone separator 1-2 and 2-2 enters cloth envelop collector I and II more respectively.In cloth envelop collector I and II, can also obtain container R like this
1-2And R
2-2Product granularity also want thin product.The pure air that comes out from cloth envelop collector I and II enters roots blower (L).Compressed air by roots blower (L) comes out divides three tunnel: one road air-flow V after water cooler (E) cooling
6Circulation enters the passage 6 of clasfficiator (C); Two road air-flow V
1Circulation enters the compressed air of disperser (F) and takes over (16); Three road air-flow V
1Emptying enters in the ambient atmosphere.Third Road air-flow V
1Mass flow equal from disperser (F) loading hopper (17) inhaled air mass flow.So the gas mass flow with emptying measures the inhaled air mass flow.
The grain flow that in the internal classification district of clasfficiator (C) (Q), does not deflect pass window (9) enter outside graded region (S), this strand grain flow is subjected to misorientation (laterally) the pneumatic jig air-flow V that enters from passage 5
5Effect, in coarse granule take the coarse granule admission passage of not taking out of 4 out of from passage 3.The tolerance that enters from passage 5 equals from the tolerance sum of passage 3 and passage 4 discharges.Gas-solid mixture from passage 3 and passage 4 outflows enters cyclone separator 3-1 and 4-1 respectively, and the solid particle of being carried secretly is separated.Make at container R
3With container R
4In obtain respectively in thick product # 3 and thick product #4.The gas-solid mixture that comes out from cyclone separator 3-1 and 4-1 enters cloth envelop collector III and IV again respectively.Just obtain respectively again than #3 and the thinner product of #4 in cloth envelop collector III and IV.So far in the present embodiment, can obtain the product of 10 kinds of granularities.Pass through the pure air that cloth envelop collector III and IV are come out, be circulated back to the passage 5 of clasfficiator (C) through air pump (B) pressurization again.At the gas outlet of air pump (B), also can add a water cooler.
In order to regulate the grain graininess size of clasfficiator (C) passage 1 and passage 2, can be from deflection air-flow regulator hole intake-gas.For measuring the gas-static in the clasfficiator (C), can locate to connect a pressure gauge at pressure tap (H).
Whole classification cycle system all is under the negative pressure state works.The parameter of each measurement point is all kept constant under steady operation conditions.
In grain graininess progressive operation process, the numerical value of pressure and temperature, as the requirement of operation control, only the foundation of continous-stable operation is not judged in conduct.
In the present embodiment: ceria polishing powder proportion is 6.7814, average grain diameter d
50=5.33 μ m, the index of precision K(=d of size distribution
75/ d
25) value is 2.778, behind the jet dry classification of sharp turn of the present invention, can obtain thin product #1, d
50=3.04 μ m, K
1=2.381, in thin product # 2, d
50=4.99 μ m, K
2=1.786, in thick product # 3, d
50=7.66 μ m, K
3=1.563, thick product #4, d
50=11.99 μ m, K
4=1.563.
The present invention is applicable to the classification of 1-100 micron powder, and especially 1-10 micron grain size scope is micro-powder graded. Have simple in structurely, production capacity is big, the classification efficiency height, and non-environmental-pollution can obtain the advantages such as multi-level Product simultaneously.
Claims (6)
1, a kind of sharp turn jet micro mist grading method, with air the micro mist granularity is carried out dry classification, the material of drying is disperseed in disperser, be ejected into classification in the clasfficiator then, classification goes out several gas-solid biphasic mixture and separates and collection again, it is characterized in that continuously and stably to the disperser feed, in dispersion process, adopt powerful stirring of machinery also to feed jet-stream wind (V
1) and inspiration air-flow (V
1), the gas-solid biphase flow after the dispersion enters the passage (7) of clasfficiator at the spout place of clasfficiator (C), sprays into the internal classification district of clasfficiator with the form of plane jet, feeds internal classification air-flow (V
6) carry out internal classification and feed misorientation pneumatic jig air-flow (V
5) carry out outer classification.
2,, it is characterized in that the air mass flow of inspiration equals internal classification circulatory system air discharged flow V in the dispersion process according to the described method of claim 1
1
3, according to the described method of claim 1, the gas-solid biphase flow after it is characterized in that disperseing enters clasfficiator, and the jet velocity at the spout place is controlled to be 10～300 meter per seconds.
4, the used device of a kind of sharp turn jet micro mist grading method, comprise decentralized system, hierarchy system, separated collection system and power circulation system, it is characterized in that decentralized system is made of feed hopper (17) mechanical agitator (D) and disperser (F), hierarchy system adopts sharp turn jet air clasfficiator (C), separated collection system is made of cyclone separator and cloth envelop collector, and power circulation system comprises: roots blower (L), air pump (B), cooler (E) and conveyance conduit (A).
5,, it is characterized in that disperser comprises body (12), hopper (17), nozzle (15), compressed air adapter (16) and reducing and expansion jet pipe (13) and be provided with a supporting plate (14) below nozzle according to the described device of claim 4.
6, according to the described device of claim 4, it is characterized in that clasfficiator (C) comprises two side plates (10), one passage master locating piece (8) is set between biside plate, passage master locating piece is provided with deflection gas flow modulation hole (0) and pressure tap (H), and the secondary locating pieces of some passages are set, constitute some passages, the numerical value of the secondary locating piece of passage can be the 6-8 piece, and can the adjustable edge of a knife (M, N, K) be set in the end of the secondary locating piece of 3-4 passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100172 CN1024169C (en) | 1990-01-15 | 1990-01-15 | Size grading method and apparatus for micropowders via sharply-turned efflux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100172 CN1024169C (en) | 1990-01-15 | 1990-01-15 | Size grading method and apparatus for micropowders via sharply-turned efflux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1053565A true CN1053565A (en) | 1991-08-07 |
| CN1024169C CN1024169C (en) | 1994-04-13 |
Family
ID=4876509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100172 Expired - Fee Related CN1024169C (en) | 1990-01-15 | 1990-01-15 | Size grading method and apparatus for micropowders via sharply-turned efflux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024169C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047108C (en) * | 1993-06-18 | 1999-12-08 | 森斯迪菲布雷托工业公司 | Method and device for separating heavy particles from a particulate material |
| CN1054319C (en) * | 1994-01-25 | 2000-07-12 | 佳能株式会社 | Gas current classifier and process for producing toner |
| CN104550020A (en) * | 2014-12-11 | 2015-04-29 | 南京航空航天大学 | Device and method for automatically separating three or more than three materials |
| CN110662610A (en) * | 2017-06-01 | 2020-01-07 | 株式会社Ryux | Powder classifying device and classifying system |
| CN111451000A (en) * | 2020-04-13 | 2020-07-28 | 青岛理工大学 | Multi-energy-field-drive-based walnut shell micro-powder multi-particle-size-domain grading device and method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69518479T2 (en) * | 1994-09-21 | 2001-05-23 | Canon Kk | Gas flow classifiers and methods for producing toner |
| US5934478A (en) * | 1995-07-25 | 1999-08-10 | Canon Kabushiki Kaisha | Gas stream classifier and process for producing toner |
-
1990
- 1990-01-15 CN CN 90100172 patent/CN1024169C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047108C (en) * | 1993-06-18 | 1999-12-08 | 森斯迪菲布雷托工业公司 | Method and device for separating heavy particles from a particulate material |
| CN1054319C (en) * | 1994-01-25 | 2000-07-12 | 佳能株式会社 | Gas current classifier and process for producing toner |
| CN104550020A (en) * | 2014-12-11 | 2015-04-29 | 南京航空航天大学 | Device and method for automatically separating three or more than three materials |
| CN104550020B (en) * | 2014-12-11 | 2016-05-18 | 南京航空航天大学 | Device and separation method that more than three kinds or three kinds material separates automatically |
| CN110662610A (en) * | 2017-06-01 | 2020-01-07 | 株式会社Ryux | Powder classifying device and classifying system |
| CN111451000A (en) * | 2020-04-13 | 2020-07-28 | 青岛理工大学 | Multi-energy-field-drive-based walnut shell micro-powder multi-particle-size-domain grading device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024169C (en) | 1994-04-13 |
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