CA1114333A - Moving bed pneumatic stratifier with anti-parallel air flow and recycling - Google Patents
Moving bed pneumatic stratifier with anti-parallel air flow and recyclingInfo
- Publication number
- CA1114333A CA1114333A CA323,818A CA323818A CA1114333A CA 1114333 A CA1114333 A CA 1114333A CA 323818 A CA323818 A CA 323818A CA 1114333 A CA1114333 A CA 1114333A
- Authority
- CA
- Canada
- Prior art keywords
- heavy
- air
- particles
- fraction
- pneumatic table
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B4/00—Separating by pneumatic tables or by pneumatic jigs
- B03B4/02—Separating by pneumatic tables or by pneumatic jigs using swinging or shaking tables
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A fluidized bed separator is disclosed, for use in dry processing of a mixture of solid particles of different specific weight. The suspension bed of the separator is associated with an air deck operating with a single-particle-layer and adapted to receive heavy particle fraction discharged from the suspension bed and still containing a small portion of light particles. The air deck operates such that a pure heavy particle fraction travels in a direction opposite to that of light particle fraction, the latter being recirculated to the suspension table as it still contains a small portion of tiny heavy particles. Since the air deck is preferably secured to the suspension table, the reciprocating drive of the table also drives the deck, the level of the deck relative to the suspension table is selectively adjustable. The device is extremely simple compared with prior art and is more universal as its operation is virtually independent on the shape of particles of the respective fractions. It is particularly suitable in processing mixtures having relatively small volume of heavy particles, wherein a pure heavy particle fraction is to be obtained.
A fluidized bed separator is disclosed, for use in dry processing of a mixture of solid particles of different specific weight. The suspension bed of the separator is associated with an air deck operating with a single-particle-layer and adapted to receive heavy particle fraction discharged from the suspension bed and still containing a small portion of light particles. The air deck operates such that a pure heavy particle fraction travels in a direction opposite to that of light particle fraction, the latter being recirculated to the suspension table as it still contains a small portion of tiny heavy particles. Since the air deck is preferably secured to the suspension table, the reciprocating drive of the table also drives the deck, the level of the deck relative to the suspension table is selectively adjustable. The device is extremely simple compared with prior art and is more universal as its operation is virtually independent on the shape of particles of the respective fractions. It is particularly suitable in processing mixtures having relatively small volume of heavy particles, wherein a pure heavy particle fraction is to be obtained.
Description
~~` ~ $~
APPARATUS FO ~R S~3PA~ATIMG HEAVY SOLIDS
AND LIGHT SOL:CDS FROM A MIXTURE: THEREOF
Description sackground of the Invent on This invention relates to the separation of mixtures of solids according to the density of the solid components, _par~icularly where the proportion o~ hea~y solids to the total amount of solids is relatively small. I~ particularly re-lates to apparatus for separating heavy solids and light 10 solids from mixtures thereof, which apparatus includes an air jig with a driven vibrating or ~jigged~ carrier and a means for separating the heavy fraction from the air jig which is contaminated with some light material, into a clean heavy fr~ction and a light fraction according to density.
1~ Prior Art : Such devices are known as shown, for example, in German patent No. 623320 of Novem~er 28, 1935. In that patent, the means for separating the heavy fraction comprises a current of air blowing transverse to the material to be 20separated as it free falls through the air current- The lighter particles are carried the greatest distance by the air current, while the relzitively heavier particles fail out closer to the air current. One disadvantage of this apparatus is that while it is intende.d ~o separate according to den~ity, 25it can do so successfully only if the heavy and the light - material have substantially the same particle size and shape.
In many, perhap~ most, cases, the~e prerequisi~es do not exist since each ~omponen~ of the mixture has a more or less wide particle size variat{ on an~ differe~nt par~icle shapes . ~ccord-30ingly, a cIeax ~eparation of heavy solids material from light solids material is not possible under th~se conditions. In order to obtain a ~lear separation, addi~ional devices axe -required! thus increasi~g the cost.
; Still another d~vice is ~hown in German published 35patent application P 27 0l 345.2-24. The apparatus disclosed in this application compri~es an air ~ig having i roll-off separator in the ~orm of an incl~ned conveyor belt. The dis-, .
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APPARATUS FO ~R S~3PA~ATIMG HEAVY SOLIDS
AND LIGHT SOL:CDS FROM A MIXTURE: THEREOF
Description sackground of the Invent on This invention relates to the separation of mixtures of solids according to the density of the solid components, _par~icularly where the proportion o~ hea~y solids to the total amount of solids is relatively small. I~ particularly re-lates to apparatus for separating heavy solids and light 10 solids from mixtures thereof, which apparatus includes an air jig with a driven vibrating or ~jigged~ carrier and a means for separating the heavy fraction from the air jig which is contaminated with some light material, into a clean heavy fr~ction and a light fraction according to density.
1~ Prior Art : Such devices are known as shown, for example, in German patent No. 623320 of Novem~er 28, 1935. In that patent, the means for separating the heavy fraction comprises a current of air blowing transverse to the material to be 20separated as it free falls through the air current- The lighter particles are carried the greatest distance by the air current, while the relzitively heavier particles fail out closer to the air current. One disadvantage of this apparatus is that while it is intende.d ~o separate according to den~ity, 25it can do so successfully only if the heavy and the light - material have substantially the same particle size and shape.
In many, perhap~ most, cases, the~e prerequisi~es do not exist since each ~omponen~ of the mixture has a more or less wide particle size variat{ on an~ differe~nt par~icle shapes . ~ccord-30ingly, a cIeax ~eparation of heavy solids material from light solids material is not possible under th~se conditions. In order to obtain a ~lear separation, addi~ional devices axe -required! thus increasi~g the cost.
; Still another d~vice is ~hown in German published 35patent application P 27 0l 345.2-24. The apparatus disclosed in this application compri~es an air ~ig having i roll-off separator in the ~orm of an incl~ned conveyor belt. The dis-, .
:
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..
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- 2 -advantage with this device is that the shape of the particle becomes the essential separation criterion rather than density and, as such, there are a limited numher of applications for the device. This device, for example, wo:rks best with solid 5 particle mixtures where the heavy materia:L has a round form .
and the relatively lighter material a flat form, such as the chips used for manufacture of chip boards which may be mixed with sand and rocks. There i.s also difficulty with th:is apparatus in that despite careful lateral covering of the conveyor belt and even the provision of a cleaning device on the top surface of the botto~l run therevf, some of the material being worked upon works its way betwsen the belt and the ~ :
bottom guide or the bottom roller (usually the driving roller) thus jamming the belt.
~ 15 Summary of the Invention In general terms, the present invention provides, in an apparatus for separating a mixture of heavy particulate material and light particular material into separate fractions of heavy and light material comprising first and second separating means, ~0 said first separating means heing an elongated air jig, means for vibra~ing the air jig, and means for discharging the clean light raction of material from one end of said air jig, the improvement comprising: lateral discharge means for discharginq the heavy fraction (which heavy fraction still contains some light material) from the air jig laterally thereo; said second separating means being positioned laterally of said air jig to receive the heavy fraction containing some light material dis-charged from the air jig by said lateral discharge means; said second separating means being a pneumatic table having a top plate onto which said heavy fraction is discharged, said pneumatic table being capable of separating said heavy fraction :
into clean heavy particles and lighter particles due to the ~ different densities; said pneumatic table being mounted to said air jig for a vibratory conveying action for conveying the heavy particles of said heavy fraction received from the air jig toward one end of said pneumatic table to provide a clean heavy particulate fraction; means for providing an air stream in a direction generally opposite to the direction of movement ' ' ' .
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and the relatively lighter material a flat form, such as the chips used for manufacture of chip boards which may be mixed with sand and rocks. There i.s also difficulty with th:is apparatus in that despite careful lateral covering of the conveyor belt and even the provision of a cleaning device on the top surface of the botto~l run therevf, some of the material being worked upon works its way betwsen the belt and the ~ :
bottom guide or the bottom roller (usually the driving roller) thus jamming the belt.
~ 15 Summary of the Invention In general terms, the present invention provides, in an apparatus for separating a mixture of heavy particulate material and light particular material into separate fractions of heavy and light material comprising first and second separating means, ~0 said first separating means heing an elongated air jig, means for vibra~ing the air jig, and means for discharging the clean light raction of material from one end of said air jig, the improvement comprising: lateral discharge means for discharginq the heavy fraction (which heavy fraction still contains some light material) from the air jig laterally thereo; said second separating means being positioned laterally of said air jig to receive the heavy fraction containing some light material dis-charged from the air jig by said lateral discharge means; said second separating means being a pneumatic table having a top plate onto which said heavy fraction is discharged, said pneumatic table being capable of separating said heavy fraction :
into clean heavy particles and lighter particles due to the ~ different densities; said pneumatic table being mounted to said air jig for a vibratory conveying action for conveying the heavy particles of said heavy fraction received from the air jig toward one end of said pneumatic table to provide a clean heavy particulate fraction; means for providing an air stream in a direction generally opposite to the direction of movement ' ' ' .
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- 2a -o~ the clean heav~ particl2s on said ~neumatic table which air stream conveys the lighter particles of said heavY Eraction in said opposite direction; and means for recycling the lighter particles of said heavy fraction from said pne~natic table back to said air jig~
The present device is, therefore, ~irected to over-coming these technical difficulties by providing a separating apparatus for separating heavy particulate material from light particulate material in a mixture thereof where the heavy material is ini~ially a relatively small portion of the mixtureO The appara~us comprises an air jig with a driven vibrating or jigged material carrier a~d a means for separating the heavy fraction from the air jig a~cording to density in such a way that the device is trouble free, costs are reduced and there is achieved an improvad separation of the heavy from the light material. Furthermore, this separation is achieved 'r independently of the shapes of the particles.
To solve this problem, the present invention provides a pneumatic table to which the hea~y fraction from the air jig ,is directed f~r further ~separation according to density. By the cooperation of the air jig and the pneuma~ic table, the .~ charactexistic~ of the two units complement each other so well that even a very small portion of heavy material may be suit-ably separated and high throughputs achieved with the air jig.
.The air jig itself provides a clean light ~raction and the heavy fraction is charged to the pneumatic table, which then provides for a very clean separation of the heavy ma~erial from the : / t '~ "`J
~' 3~
1 remaining light material. The light material from the pneu~
matic table is then again charged to the air jig.
The throuyhput capacity of th~s pneumatic table itself is low since its operating principle is such as to 5 operate upon a s~ngle layer of grains or particIes. However, it can be so adjusted as to be adap~ed optimally to the heavy -material fraction from the air jig which fraction is small in amount so that large total throughputs 1with a very clean separation of heavy material from light material can be 10 obtained. Still further, relatively small heavy particles that are included in the charge to the pneumatic table ~rom the air jig and which are mixed with light material will, because of their small particle size, be pushed ~ogether into a high concentration on the pneumatic table into a loose heap 15 which then behaves as if the particles were somewhat larger so that this loose heap or compact mass when recycled to the air ~ig is discharged toge~her with the larger particle heavy material. This effect can be utilized advantageously if, as described above, the light material discharged Prom the pneu-20 matic table which still contai~ some heavy material is chargedagain onto the air jig, thus leading to a concentration of heavy particles in the heavy fraction of the air jig, and enhancing the described ~gglomeration effect.
Advantageously from the standpoint of cost and space 25 requirements, the pneumatic table may be connected to the vibrating carrier of the air jig so that a separate drive and foundation are not required. It has been found that there is a sufficiently wide range of vibrating parameters with which the air ~ig and the pneumatic table can operate quite wéll : ~ 30 simultaneously.
Brief Description of the Drawin~s The construction and operation of the device will be apparent to those skilled in the art from the following de-scription and the accompanying drawing~, in which:
FIG. 1 shows a slde elevation of ~he appara~us;
FIG. 2 shows a plan Yiew of the apparatus;
FIG. 3 shows an enlarged view of the pneumatic table . ~ -, : . ' S ~ ,, 3~
_ - 4 -1 in Plevation in accordance with FIG, l;
~ IG. 4 shows an end eleva ion of the pneumatic table generally in the scale of FIG. 3 taken looking from left to ,right in FIG. l; and 5' . FI~. 5 shows a further enlarged cross-sectisn ` through the top plate of the pneumatic table in the area of ~the circle A of FIG. 3.
etailed Description of ~he Preferred Embodiment The mixture of solid particles to be separated, 10 which comprises a light particulate material with which a relatively smaller portion of heavy particulate material is mixed, is ed to the air jig l at charging station 2 from whence it is fed by the vibration of the carrier 4 onto the screen bottom 3 of the carrier 4. ~igged material carrier 4 15 is a vibrating conveyor supported by rods 5 pivoted at one end to the base 6 and at their other end pivoted to the sides of air boxes lO which, in turn, are secured to the carrier 4 below the screen 3. The ends of the rods 5 may be mounted by shock absorbing rubber bushings (not detailed) to suitable 20 stub shafts S'. Also secured to the base 6 is a driving motor 7 connected by belt 7' to an eccentric 8' which has pivoted thereto 2nd eccentric of i~s axis a connecting rod 8 which is pivoted at its other end to a depending structural element : . lO' depending,from and secuxed to one of the air boxes lO.
. ''Air for separation of particulate material in accord-ance with known principles of air jigs (hereinafter called jigging air~ is,~upplied intermittently through lines ll con-nected by two connec~ers 9 to the aix boxes lO. When the motor 7 i~ operated and the air is ~upplied intermi~ently as 30 mentioned above, the material carrier 4 move~ in 'a slight arc back and forth, as indicated by the arrow 26, which motion . together with the jigging air results in a sinking of the heavy : ~aterial.wi~h ~he light material arranged in a top layer over the he~vy material which, in turn 9 re~ts u~on screen bottom 3.
35 This top layer oiE ligh~ material i~ m~ved by the vibrating of the carxier 4 ~oward and over the w~ir 12 and then onto the.
B ~. di~charge chute 13. ',, .
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; , i .
3~
_ _ 5 1 The heavy fraction of the particulate material is directed by a guide bar 14, which is of lesser h~ight than the weir 12. The guide bar 14 is o~ screen bottom 3 and directs ..or deflects ~he heavy fraction to a di~charge opening 15 in the side wall 16 of the material carrier 4. This is accom-plished by the obligue position of the guide bar 14. The heavy ~fraction which con~ains some light mater:ial thus passes through the opening 15, down the chute 17 and onto the top plate 20 of the pneumatic table 18.
This pneuma~ic table 18 is secured laterally on the jigged material carrier 4 and comprises a square box 19 with the plate 20 secured to the top thereof. Conduit 21 connects to the box 19 to provide a supply of working air. A chute 22 discharges clean heavy material and a discharge pipe 24 is 15provided for the discharge of material falling through the top plate 20. The longitudinal axis 25 of the pneumatic table extends parallel to the general direction o~ movement, indi- :
cated by the arrow 126 in FIG. 2, of the jigged material ~
carrier 4. The pneumatic table 18 is secured in a generally U-shaped mount 27 and may be adjus~ed about its longitudinal axis 25, in order to influence the distribution of the material over the width of the top plate 20. The mounting of the . pneumatic table 18 to the U-shaped mount 27 may be accomplished : in any of a number of conventional ways, it being only neces-~: 25SarY that the mounting provide for adjustability of the pneu-matic table, as indicated by the arrows 28, about the axis 25.
One such mounting arranyement i5 shown as comprising threaded studs 25' secured to the opposite walls of the box 19 and passing through one of th~ flanges o.f Ithe angle irons which 30make up the U-shaped frame 27~ Nuts 26^ may then ~e threaded - upon the ~hreaded studs 25' and tightened ~o secure the pneumatic table 18 in its desired position'about the axis 25.
For a~ditional securement, second nuts~ like nuts 26', may be threaded upon the studs 25' as lock nuts. As mentioned, other 3sarrang~ments for eecuring thè table 18 in an adjustable manner abou~ the axis 25 a~e contemplatedO rrhe solid line and dashed line positions t shown in FIG. 4, indicate but two of the pos--- . . .
, ' '.
':
1 sible adjusted positions for the table 180 A laterally extending stub shaft 29 is secured tothe U-shaped frame 27, by welding or the like, and is arranged with its axis 30 perpendicular to the longitudinal axis 25.
5 The stub shaft 29 i9 received within a bushing 31 rigidly . connected, by welding or the like, to the carrier 4. The stub shaft 29 is secured within th~ bu~hing 31 by any suitable means, such as the set screw 31' which i~ threadedly engaged in a threaded opening in the bushing 31 and bears agains~
10 the stub shaft 29. A knurled head on ~he se~ screw 31'.per-mits hand-tightening of.the set screw 31', although.the same may be tightened by wrench or some other tool, if desired.
Other means of securing the stub shaft 29 within the bushing 31 after adjustment about the axis 30 are con~emplated, and 15 any number of conventional securements, will be apparen~ to those skilled in the art. In FIGo 3 ~ the solid line and dashed line positions are but two of the possible positions for adjustment of the pneumatic table 18 about the axis 30.
The top plate 20 comprises a commercialiy availab}e 20ribbPd trapezoidal screen which has in its cross section the form shown in FIG. 5. Air supplied through the conduit 21 .
may be adjusted by the throttle valve 34 and after passing thro-~gh the box 19 it issues through the top plate 20 in the direction indicated by the arrows 35.in FIG. 5. That is to say, it is direc~ed upwardly and toward the rear of the apparatus (~oward the xight in he figures). The special ~hape and arrangement of the openi~gs in the top plate 20, as shown in FIG. 5, insures that the air travels. in the direction i~dicated by the arrow 35 which is generally in the opposite 30direction to the dir~ction in which the heavy material frac-tion i8 being conveyed by the . effects of the vibra ing c~ r
- 2a -o~ the clean heav~ particl2s on said ~neumatic table which air stream conveys the lighter particles of said heavY Eraction in said opposite direction; and means for recycling the lighter particles of said heavy fraction from said pne~natic table back to said air jig~
The present device is, therefore, ~irected to over-coming these technical difficulties by providing a separating apparatus for separating heavy particulate material from light particulate material in a mixture thereof where the heavy material is ini~ially a relatively small portion of the mixtureO The appara~us comprises an air jig with a driven vibrating or jigged material carrier a~d a means for separating the heavy fraction from the air jig a~cording to density in such a way that the device is trouble free, costs are reduced and there is achieved an improvad separation of the heavy from the light material. Furthermore, this separation is achieved 'r independently of the shapes of the particles.
To solve this problem, the present invention provides a pneumatic table to which the hea~y fraction from the air jig ,is directed f~r further ~separation according to density. By the cooperation of the air jig and the pneuma~ic table, the .~ charactexistic~ of the two units complement each other so well that even a very small portion of heavy material may be suit-ably separated and high throughputs achieved with the air jig.
.The air jig itself provides a clean light ~raction and the heavy fraction is charged to the pneumatic table, which then provides for a very clean separation of the heavy ma~erial from the : / t '~ "`J
~' 3~
1 remaining light material. The light material from the pneu~
matic table is then again charged to the air jig.
The throuyhput capacity of th~s pneumatic table itself is low since its operating principle is such as to 5 operate upon a s~ngle layer of grains or particIes. However, it can be so adjusted as to be adap~ed optimally to the heavy -material fraction from the air jig which fraction is small in amount so that large total throughputs 1with a very clean separation of heavy material from light material can be 10 obtained. Still further, relatively small heavy particles that are included in the charge to the pneumatic table ~rom the air jig and which are mixed with light material will, because of their small particle size, be pushed ~ogether into a high concentration on the pneumatic table into a loose heap 15 which then behaves as if the particles were somewhat larger so that this loose heap or compact mass when recycled to the air ~ig is discharged toge~her with the larger particle heavy material. This effect can be utilized advantageously if, as described above, the light material discharged Prom the pneu-20 matic table which still contai~ some heavy material is chargedagain onto the air jig, thus leading to a concentration of heavy particles in the heavy fraction of the air jig, and enhancing the described ~gglomeration effect.
Advantageously from the standpoint of cost and space 25 requirements, the pneumatic table may be connected to the vibrating carrier of the air jig so that a separate drive and foundation are not required. It has been found that there is a sufficiently wide range of vibrating parameters with which the air ~ig and the pneumatic table can operate quite wéll : ~ 30 simultaneously.
Brief Description of the Drawin~s The construction and operation of the device will be apparent to those skilled in the art from the following de-scription and the accompanying drawing~, in which:
FIG. 1 shows a slde elevation of ~he appara~us;
FIG. 2 shows a plan Yiew of the apparatus;
FIG. 3 shows an enlarged view of the pneumatic table . ~ -, : . ' S ~ ,, 3~
_ - 4 -1 in Plevation in accordance with FIG, l;
~ IG. 4 shows an end eleva ion of the pneumatic table generally in the scale of FIG. 3 taken looking from left to ,right in FIG. l; and 5' . FI~. 5 shows a further enlarged cross-sectisn ` through the top plate of the pneumatic table in the area of ~the circle A of FIG. 3.
etailed Description of ~he Preferred Embodiment The mixture of solid particles to be separated, 10 which comprises a light particulate material with which a relatively smaller portion of heavy particulate material is mixed, is ed to the air jig l at charging station 2 from whence it is fed by the vibration of the carrier 4 onto the screen bottom 3 of the carrier 4. ~igged material carrier 4 15 is a vibrating conveyor supported by rods 5 pivoted at one end to the base 6 and at their other end pivoted to the sides of air boxes lO which, in turn, are secured to the carrier 4 below the screen 3. The ends of the rods 5 may be mounted by shock absorbing rubber bushings (not detailed) to suitable 20 stub shafts S'. Also secured to the base 6 is a driving motor 7 connected by belt 7' to an eccentric 8' which has pivoted thereto 2nd eccentric of i~s axis a connecting rod 8 which is pivoted at its other end to a depending structural element : . lO' depending,from and secuxed to one of the air boxes lO.
. ''Air for separation of particulate material in accord-ance with known principles of air jigs (hereinafter called jigging air~ is,~upplied intermittently through lines ll con-nected by two connec~ers 9 to the aix boxes lO. When the motor 7 i~ operated and the air is ~upplied intermi~ently as 30 mentioned above, the material carrier 4 move~ in 'a slight arc back and forth, as indicated by the arrow 26, which motion . together with the jigging air results in a sinking of the heavy : ~aterial.wi~h ~he light material arranged in a top layer over the he~vy material which, in turn 9 re~ts u~on screen bottom 3.
35 This top layer oiE ligh~ material i~ m~ved by the vibrating of the carxier 4 ~oward and over the w~ir 12 and then onto the.
B ~. di~charge chute 13. ',, .
.
; , i .
3~
_ _ 5 1 The heavy fraction of the particulate material is directed by a guide bar 14, which is of lesser h~ight than the weir 12. The guide bar 14 is o~ screen bottom 3 and directs ..or deflects ~he heavy fraction to a di~charge opening 15 in the side wall 16 of the material carrier 4. This is accom-plished by the obligue position of the guide bar 14. The heavy ~fraction which con~ains some light mater:ial thus passes through the opening 15, down the chute 17 and onto the top plate 20 of the pneumatic table 18.
This pneuma~ic table 18 is secured laterally on the jigged material carrier 4 and comprises a square box 19 with the plate 20 secured to the top thereof. Conduit 21 connects to the box 19 to provide a supply of working air. A chute 22 discharges clean heavy material and a discharge pipe 24 is 15provided for the discharge of material falling through the top plate 20. The longitudinal axis 25 of the pneumatic table extends parallel to the general direction o~ movement, indi- :
cated by the arrow 126 in FIG. 2, of the jigged material ~
carrier 4. The pneumatic table 18 is secured in a generally U-shaped mount 27 and may be adjus~ed about its longitudinal axis 25, in order to influence the distribution of the material over the width of the top plate 20. The mounting of the . pneumatic table 18 to the U-shaped mount 27 may be accomplished : in any of a number of conventional ways, it being only neces-~: 25SarY that the mounting provide for adjustability of the pneu-matic table, as indicated by the arrows 28, about the axis 25.
One such mounting arranyement i5 shown as comprising threaded studs 25' secured to the opposite walls of the box 19 and passing through one of th~ flanges o.f Ithe angle irons which 30make up the U-shaped frame 27~ Nuts 26^ may then ~e threaded - upon the ~hreaded studs 25' and tightened ~o secure the pneumatic table 18 in its desired position'about the axis 25.
For a~ditional securement, second nuts~ like nuts 26', may be threaded upon the studs 25' as lock nuts. As mentioned, other 3sarrang~ments for eecuring thè table 18 in an adjustable manner abou~ the axis 25 a~e contemplatedO rrhe solid line and dashed line positions t shown in FIG. 4, indicate but two of the pos--- . . .
, ' '.
':
1 sible adjusted positions for the table 180 A laterally extending stub shaft 29 is secured tothe U-shaped frame 27, by welding or the like, and is arranged with its axis 30 perpendicular to the longitudinal axis 25.
5 The stub shaft 29 i9 received within a bushing 31 rigidly . connected, by welding or the like, to the carrier 4. The stub shaft 29 is secured within th~ bu~hing 31 by any suitable means, such as the set screw 31' which i~ threadedly engaged in a threaded opening in the bushing 31 and bears agains~
10 the stub shaft 29. A knurled head on ~he se~ screw 31'.per-mits hand-tightening of.the set screw 31', although.the same may be tightened by wrench or some other tool, if desired.
Other means of securing the stub shaft 29 within the bushing 31 after adjustment about the axis 30 are con~emplated, and 15 any number of conventional securements, will be apparen~ to those skilled in the art. In FIGo 3 ~ the solid line and dashed line positions are but two of the possible positions for adjustment of the pneumatic table 18 about the axis 30.
The top plate 20 comprises a commercialiy availab}e 20ribbPd trapezoidal screen which has in its cross section the form shown in FIG. 5. Air supplied through the conduit 21 .
may be adjusted by the throttle valve 34 and after passing thro-~gh the box 19 it issues through the top plate 20 in the direction indicated by the arrows 35.in FIG. 5. That is to say, it is direc~ed upwardly and toward the rear of the apparatus (~oward the xight in he figures). The special ~hape and arrangement of the openi~gs in the top plate 20, as shown in FIG. 5, insures that the air travels. in the direction i~dicated by the arrow 35 which is generally in the opposite 30direction to the dir~ction in which the heavy material frac-tion i8 being conveyed by the . effects of the vibra ing c~ r
4. The openings in ~he top plate 20 are caused by up-struck ribs 33. The fractions of heavy and light material separa~ed on thepneumatic table 18 are conveyed in opposite directions.
35The heavy material is discharged through chute 2~ and removed for further use, which removal may be effecte~ by any suitable means, such as a conveyor no~ ~hownO
. .
, a~3 1 Small heavy material portions which may have dropped through the opening~ in the top plate 20 are discharged pneumatically with a part of the working air through the dis-charge pipe 24. The cross-sectionAl area of the discharge
35The heavy material is discharged through chute 2~ and removed for further use, which removal may be effecte~ by any suitable means, such as a conveyor no~ ~hownO
. .
, a~3 1 Small heavy material portions which may have dropped through the opening~ in the top plate 20 are discharged pneumatically with a part of the working air through the dis-charge pipe 24. The cross-sectionAl area of the discharge
5 pipe 24 is so selected or adjusted that the disch~rged par-ticles have only a ve~y low veloci~y ancl thus may be trapped ~in a simple open container or, if desir~d, fed to the rest of the heavy material issuing from the chute 22.
The light mater:ial separated by the pneumatic table 10 18, which may still contain small portions of heavy material, and, in particular, small sized heavy particles, is moved by the air issuing through t~le plate 20 and in part by the vibra-tion of the table 18 toward the chute 23 which discharges this raction onto the inclined conveyor belt 36, which then moves 15 it upwardly and charges it to the air jig, again over the chute 37.
It will be seen that by use of the appara~us described above, xelatively high throughputs may be achieved for the air jig or vibrating carrier 1 with the clean light (and larger 20 quant~tyl fraction being clischarged over the chute 13. The smaller quantity o~ heavy fraction which may have some light ~: material mixed therewith is then separated on the pneumatic table resulting in a clean heavy fraction being discharged from the chute 22. The lîght material, which may ~tilL have some . 25 heavy material mixed therewith, is then recy~ledO
It will also be seen that by securing the pneumatic table 18 to the carrier 4 that certain advantages are achieved in that a separate drive ~s not required nor is a special or separate feeding devi~e neces8ary for feeding the material to 30 the pneumatic table. Also, the adjustment~ pro~ided for the pneumatic table permit adjustment o~ the same in order to achieve the op~imum ~eparation for a variety of diffQrent particulate material mixtures.
While the openlngs produced by the ribs 33 in the .; 35 plate 2û guide. the air in the dir~ctlon of the arrows 35 in ; the preferred arrangement, it is po~sible to utilize the plate 20 and ~he pneuma~ic ~able 18 with the air issuing vertically ..
,~ .
; , ~!,~
, ~ ' ' ' , ' ' .
~, :
'~ ~
1 upwardly perpendicular to the plate 2Q. Also, it is possible to vary the size of the openings in the top plate 20, since there are a variety of sizes available commercially in these ribbed trapezoidal screens. Alternatively, for certain appli-~ cations, it may be desired to have several hole widths in : . the same plate.;.
By proper adjustment vf the working air through the throttle 34 a sifting effect may be achieved which is very effective for separating according ~o density. As indicated 10 aboYe,.this is generally adjusted so that part of the heavy particles are carried.along with the light materlal for re cycling, thus resulting in a very clean heavy fraction. The heavy material returned with the light material to the air jig enhances the previously mentioned agglomeration effect of the 15small heavy particles on t:he pneumatic table.
Tf desired or necessary, a suction hood may be posi-tioned above the pneumatic table for dust removal.
.
,~ , , ' .
.
. , .
.
. , ' 3~ .
J~
._. .,_ ~i ' .
The light mater:ial separated by the pneumatic table 10 18, which may still contain small portions of heavy material, and, in particular, small sized heavy particles, is moved by the air issuing through t~le plate 20 and in part by the vibra-tion of the table 18 toward the chute 23 which discharges this raction onto the inclined conveyor belt 36, which then moves 15 it upwardly and charges it to the air jig, again over the chute 37.
It will be seen that by use of the appara~us described above, xelatively high throughputs may be achieved for the air jig or vibrating carrier 1 with the clean light (and larger 20 quant~tyl fraction being clischarged over the chute 13. The smaller quantity o~ heavy fraction which may have some light ~: material mixed therewith is then separated on the pneumatic table resulting in a clean heavy fraction being discharged from the chute 22. The lîght material, which may ~tilL have some . 25 heavy material mixed therewith, is then recy~ledO
It will also be seen that by securing the pneumatic table 18 to the carrier 4 that certain advantages are achieved in that a separate drive ~s not required nor is a special or separate feeding devi~e neces8ary for feeding the material to 30 the pneumatic table. Also, the adjustment~ pro~ided for the pneumatic table permit adjustment o~ the same in order to achieve the op~imum ~eparation for a variety of diffQrent particulate material mixtures.
While the openlngs produced by the ribs 33 in the .; 35 plate 2û guide. the air in the dir~ctlon of the arrows 35 in ; the preferred arrangement, it is po~sible to utilize the plate 20 and ~he pneuma~ic ~able 18 with the air issuing vertically ..
,~ .
; , ~!,~
, ~ ' ' ' , ' ' .
~, :
'~ ~
1 upwardly perpendicular to the plate 2Q. Also, it is possible to vary the size of the openings in the top plate 20, since there are a variety of sizes available commercially in these ribbed trapezoidal screens. Alternatively, for certain appli-~ cations, it may be desired to have several hole widths in : . the same plate.;.
By proper adjustment vf the working air through the throttle 34 a sifting effect may be achieved which is very effective for separating according ~o density. As indicated 10 aboYe,.this is generally adjusted so that part of the heavy particles are carried.along with the light materlal for re cycling, thus resulting in a very clean heavy fraction. The heavy material returned with the light material to the air jig enhances the previously mentioned agglomeration effect of the 15small heavy particles on t:he pneumatic table.
Tf desired or necessary, a suction hood may be posi-tioned above the pneumatic table for dust removal.
.
,~ , , ' .
.
. , .
.
. , ' 3~ .
J~
._. .,_ ~i ' .
Claims (7)
1. In an apparatus for separating a mixture of heavy particulate material and light particulate material into separate fractions of heavy and light material comprising first and second separating means, said first separating means being an elongated air jig, means for vibrating the air jig, and means for discharging the clean light fraction of material from one end of said air jig, the improvement comprising:
a) lateral discharge means for discharging the heavy fraction (which heavy fraction still contains come light material) from the air jig laterally thereof;
b) said second separating means being positioned laterally of said air jig to receive the heavy fraction containing some light material dis-charged from the air jig by said lateral discharge means;
c) said second separating means being a pneumatic table having a top plate onto which said heavy fraction is discharged, said pneumatic table being capable of separating said heavy fraction into clean heavy particles and lighter particles due to the different densities;
d) said pneumatic table being mounted to said air jig for a vibratory conveying action for con-veying the heavy particles of said heavy frac-tion received from the air jig toward one end of said pneumatic table to provide a clean heavy particulate fraction;
e) means for providing an air stream in a direc-tion generally opposite to the direction of movement of the clean heavy particles on said penumatic table which air stream conveys the lighter particles of said heavy fraction in said opposite direction; and f) means for recycling the lighter particles of said heavy fraction from said pneumatic table back to said air jig.
a) lateral discharge means for discharging the heavy fraction (which heavy fraction still contains come light material) from the air jig laterally thereof;
b) said second separating means being positioned laterally of said air jig to receive the heavy fraction containing some light material dis-charged from the air jig by said lateral discharge means;
c) said second separating means being a pneumatic table having a top plate onto which said heavy fraction is discharged, said pneumatic table being capable of separating said heavy fraction into clean heavy particles and lighter particles due to the different densities;
d) said pneumatic table being mounted to said air jig for a vibratory conveying action for con-veying the heavy particles of said heavy frac-tion received from the air jig toward one end of said pneumatic table to provide a clean heavy particulate fraction;
e) means for providing an air stream in a direc-tion generally opposite to the direction of movement of the clean heavy particles on said penumatic table which air stream conveys the lighter particles of said heavy fraction in said opposite direction; and f) means for recycling the lighter particles of said heavy fraction from said pneumatic table back to said air jig.
2. The apparatus according to claim 1, in which said pneumatic table is rigidly connected with the vibrating carrier of the air jig.
3. The apparatus according to claim 2, in which said pneumatic table is mounted for pivotal adjustment about its longi-tudinal axis.
4. The apparatus according to claim 3, in which said penumatic table is mounted for pivotal adjustment about an axis transverse to its longitudinal axis.
5. The apparatus according to claim 4, in which the top plate of said pneumatic table has openings which deflect the working air of said table in a direction generally opposite to that of the discharge of the clean heavy fraction.
6. The apparatus according to any one of claims 1, 2 or 3, in which said pneumatic table includes a discharge means for discharging heavy material falling through the top plate.
7. The apparatus according to any one of claims 4 or 5, in which said pneumatic table includes a discharge means for discharging heavy material falling through the top plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2812286.3-24 | 1978-03-21 | ||
| DE19782812286 DE2812286C2 (en) | 1978-03-21 | 1978-03-21 | Device for separating heavy and light goods in a solid mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1114333A true CA1114333A (en) | 1981-12-15 |
Family
ID=6035053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA323,818A Expired CA1114333A (en) | 1978-03-21 | 1979-03-20 | Moving bed pneumatic stratifier with anti-parallel air flow and recycling |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS54131174A (en) |
| AT (1) | AT362736B (en) |
| BE (1) | BE874975A (en) |
| CA (1) | CA1114333A (en) |
| CH (1) | CH637037A5 (en) |
| DE (1) | DE2812286C2 (en) |
| DK (1) | DK151941C (en) |
| FI (1) | FI63870C (en) |
| FR (1) | FR2420370A1 (en) |
| SE (1) | SE435902B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382654A (en) * | 2017-09-01 | 2017-11-24 | 上海华畅环保设备发展有限公司 | Methanol-to-olefins chilled water (chw) ebullated bed separation method and device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3616946A1 (en) * | 1986-05-20 | 1987-11-26 | Organ Faser Technology Co | METHOD FOR SEPARATING A HETEROGENIC QUANTITY OF SOLID MATERIAL IN FRACTIONS, AND DEVICE FOR CARRYING OUT THE METHOD |
| DE19959819B4 (en) * | 1999-12-11 | 2006-10-19 | Eurec Technology Gmbh Development & Design | vibrating screens |
| CN109755999B (en) * | 2019-01-19 | 2019-08-16 | 东莞市中明精密五金电子科技有限公司 | A kind of wireless charger being easily installed disassembly |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE392205A (en) * | ||||
| DE623320C (en) * | ||||
| US1076915A (en) * | 1912-12-09 | 1913-10-28 | Fulton Iron Works | Fuel-pump for internal-combustion engines. |
| GB232470A (en) * | 1924-07-28 | 1925-04-23 | Henry Moore Sutton | Improvements in or relating to apparatus for the separation of dry materials |
| DE530037C (en) * | 1928-04-29 | 1931-07-25 | Fr Groeppel C Luehrig S Nachfo | Air set stove with longitudinal guide rails on the laterally inclined stove surface |
| US1832048A (en) * | 1928-05-02 | 1931-11-17 | Peale Davis Company | Process and mechanism for separating intermixed divided materials |
| US2063533A (en) * | 1933-06-10 | 1936-12-08 | Vissac Gustave Andre | Air cleaner and classifier for fine coals |
| DE673968C (en) * | 1934-05-29 | 1939-04-01 | Erich Kramm Dr Ing | Air setting process |
| FR1039692A (en) * | 1951-04-28 | 1953-10-08 | Three-product sorter | |
| CH498664A (en) * | 1968-04-17 | 1970-11-15 | Buehler Ag Geb | Device for separating granular material |
| DE2134803C3 (en) * | 1970-08-03 | 1975-11-13 | Gebrueder Buehler Ag, Uzwil (Schweiz) | Apparatus for sorting and separating a minority of grains, lower floating speed and a majority of grains higher floating speed. ability from mixtures of granular goods |
| IT1039633B (en) * | 1975-07-04 | 1979-12-10 | Amedeo Sangati Sas | SORTING MACHINE FOR GRAVITY AND DRY SPIETRATING MACHINE FOR GRANULATES IN PARTICULAR CEREALS |
-
1978
- 1978-03-21 DE DE19782812286 patent/DE2812286C2/en not_active Expired
- 1978-12-01 AT AT859778A patent/AT362736B/en not_active IP Right Cessation
-
1979
- 1979-02-01 FR FR7902602A patent/FR2420370A1/en active Granted
- 1979-02-01 DK DK43179A patent/DK151941C/en not_active IP Right Cessation
- 1979-03-16 CH CH251479A patent/CH637037A5/en not_active IP Right Cessation
- 1979-03-19 FI FI790921A patent/FI63870C/en not_active IP Right Cessation
- 1979-03-19 SE SE7902466A patent/SE435902B/en not_active IP Right Cessation
- 1979-03-20 BE BE0/194119A patent/BE874975A/en not_active IP Right Cessation
- 1979-03-20 CA CA323,818A patent/CA1114333A/en not_active Expired
- 1979-03-22 JP JP3240079A patent/JPS54131174A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382654A (en) * | 2017-09-01 | 2017-11-24 | 上海华畅环保设备发展有限公司 | Methanol-to-olefins chilled water (chw) ebullated bed separation method and device |
| CN107382654B (en) * | 2017-09-01 | 2023-08-25 | 上海华畅环保设备发展有限公司 | Separation method and device for quenching water boiling bed for preparing olefin from methanol |
Also Published As
| Publication number | Publication date |
|---|---|
| AT362736B (en) | 1981-06-10 |
| DE2812286C2 (en) | 1984-11-15 |
| DK151941C (en) | 1988-07-11 |
| FI790921A (en) | 1979-09-22 |
| DK43179A (en) | 1979-09-22 |
| DK151941B (en) | 1988-01-18 |
| CH637037A5 (en) | 1983-07-15 |
| FR2420370B1 (en) | 1983-01-21 |
| JPS5632035B2 (en) | 1981-07-24 |
| JPS54131174A (en) | 1979-10-12 |
| SE435902B (en) | 1984-10-29 |
| SE7902466L (en) | 1979-09-22 |
| ATA859778A (en) | 1980-11-15 |
| BE874975A (en) | 1979-07-16 |
| FI63870C (en) | 1983-09-12 |
| FR2420370A1 (en) | 1979-10-19 |
| FI63870B (en) | 1983-05-31 |
| DE2812286B1 (en) | 1979-09-20 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |