WO2000024504A1 - Method and apparatus for coating granules - Google Patents
Method and apparatus for coating granules Download PDFInfo
- Publication number
- WO2000024504A1 WO2000024504A1 PCT/GB1999/003524 GB9903524W WO0024504A1 WO 2000024504 A1 WO2000024504 A1 WO 2000024504A1 GB 9903524 W GB9903524 W GB 9903524W WO 0024504 A1 WO0024504 A1 WO 0024504A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- granules
- grains
- tube
- mixture
- tumbling
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/25—Mixers with rotating receptacles with material flowing continuously through the receptacles from inlet to discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
- B01F29/403—Disposition of the rotor axis
- B01F29/4033—Disposition of the rotor axis inclined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
- B01F29/63—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with fixed bars, i.e. stationary, or fixed on the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
- B05C3/04—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material
- B05C3/08—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material with special provision for agitating the work or the liquid or other fluent material the work and the liquid or other fluent material being agitated together in a container, e.g. tumbled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/60—Mixing solids with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
- B29B2009/163—Coating, i.e. applying a layer of liquid or solid material on the granule
Definitions
- This invention relates to a method and apparatus for coating granules, and in particular for coating granules in the manufacture of waste water treatment media.
- Waste water can be treated by gasification, for example by the aeration or
- Oxygen does not dissolve easily or quickly in water and it is
- WO 96/25367 that a treatment plant be provided comprising a treatment vessel
- loose particulate material acts as a fluidizable bed driven into circulation by the gas
- the particulate material provides a habitat for
- granules of plastics material each having a plurality of grains of a substantially inert material coated thereon, the granules having a
- particulate material of this type is described in which the sand and the salt are mixed in
- the softening temperature of polyethylene is in the range of about 180 to
- this method of production is a batch process requiring, for each production cycle, the heating and subsequent cooling of a
- the present invention is intended to overcome the disadvantages of the prior art, at least in part.
- this invention provides a method of manufacturing loose particulate material in the form of granules of plastics material carrying grains of
- said method comprising tumbling and heating a mixture of
- this invention provides apparatus for manufacturing loose particulate material in the form of plastics material carrying grains of another material
- said apparatus comprising means for tumbling and heating a mixture of grains and granules to a temperature not less than the softening temperature of the granules so
- the inventive method and apparatus allows the coating of granules by a continuous process.
- the process is relatively quick and can be easily and simply scaled
- Figure 1 shows a partially cut away view of a first embodiment of apparatus
- Figures 2a to 2c show an end view of a tube of the apparatus of figure 1 at
- Figure 3 shows a partially cut away view of a second embodiment of apparatus
- hollow tube 1 mounted for rotation about its axis through two, spaced apart, bearings 2.
- the tube should have a length to diameter ratio of about 5 to 1, but this is not
- the bearings 2 are supported by a supporting structure (not shown) so that the
- a pulley 2 is mounted
- a band heater 5 surrounds a central section of the tube 1.
- rib 6 projects radially inwardly from the inner surface of the tube 1 and extends along its
- the rib 6 project inwards by a distance in the range 1/3
- hopper 8 are arranged to feed sand salt mixture and plastics granules respectively onto a
- the first and second hoppers 7 and 8 have
- the sieve 10 is inclined at an angle so that the particles 10 can move
- the sand/salt mixture passing through the sieve 10 falls into a mixture
- a motor 12b is located and driven by a motor 12b to drive the sand/salt mixture through a return pipe
- the first hopper 7 is charged with a mixture of sand and salt grains.
- hopper 8 is charged with polyethylene granules having a diameter in the size range 4 to
- the band heater 5 is then activated to begin heating the tube 1.
- the motor 8b is also activated to begin delivering plastics granules through the metering unit 8a from the second hopper 8 through the chute 9 into the upper end of the tube 1.
- the band heater 5 heats the tube walls in the central region of the tube 1
- polyethylene granules i.e. higher than about 200 °C and preferably in the range 215 to
- the apparatus is arranged so that the maximum temperature of the upper end of the
- the mixture of grains and granules passes along the bottom of the tube 1
- the length of the lower part of the tube 1 is arranged so that the granules are
- the sieve 10 is inclined so that the mixture of grains and granules tends to slide
- the sieve 10 may be rocked or vibrated to encourage the grains to
- the grains in the recycling hopper 12 are driven through pipe 13 by the worm
- This comprises a cylindrical hollow tube 1 mounted on bearings 2 at a shallow
- the tube 1 is heated by three separate band heaters 15a, 15b and 15c spaced
- heater 5 of the first embodiment allows the temperature gradients within the tube 1 to be
- the tube 1 has an internal rib 6 similarly to the first embodiment but the rib 6
- tube 1 pass along tube 1 for a short distance before being stirred and mixed by the rib 6.
- this short ribless entry section of the tube 1 helps to ensure a steady flow of the grains and granules into the tube 1 and allows the chute 9 to project into the
- the cylindrical sieving section 19 is co ⁇
- the cylindrical sieving section 19 is a cylindrical tube perforated by a large
- cylindrical sieving section 19 is co-axial with the tube
- section 19 rotates the mixture of grains and granules slides along the lower surface of
- the sieve section 19 is a separate element to the
- tube 1 and is secured to it, for example by welding. It would be possible to form a tube
- Baffle 16 is provided at the bottom ends of the sieve section 19, leaving
- the mixture of unused grains passing through the sieve 10 is recycled through
- a filter 18 is provided at the top of the first hopper 7 to allow the
- the filter 18 is sized to block the grains carried by the air flow along pipe
- heating could instead be provided by an array of separate heaters spaced around the
- the speed of rotation of the tube 1 is sufficiently high the use of single or multiple
- element band heaters is not essential since a single heater could be used instead.
- a suitable anti-coagulant can be any suitable anti-coagulant.
- chute 9 it can be arranged for the temperature of the grains to be maintained at a
- the system stabilises so that the granules can be added and reliable coating started, so
- staggered ribs could be used.
- hoppers for sand and salt grains respectively would normally be provided feeding into
- connection transfer of heat from the cooling mixture towards the lower end of the tube to the mixture being heated in the upper end of the tube also results in more
- the granules within the second hopper can also be
- preheating should only be to a temperature well below the melting
- coated granules are washed with water to dissolve the salt leaving the
- the resulting brine can be recycled to
- the material and size of the granules can be varied as necessary. It has
- the plastics material used can be
- the sand and salt grains can be of any convenient type and it is generally
- the grains prefferably have a small grain size for example for 0.1 to 3.5 mm and preferably by 0.1 to 2.5 mm.
- the mixture of grains of sand and salt can be in any ratio from all sand through
- ratio of the sand grains is the same as the sand to salt ratio in the grain mixture.
- the density of the plastics material is less the density of the sand
- the average surface area added to the granule by a recess is the same as that added by an
- the amount of sand and salt in the finished particles is much
- produced particles are generally derived from the shape of the plastics granules rather
- the coated particles are long cylinders the coated particles
- the granules are to have a controlled density, for example
- particles having a varying density are acceptable, for example for use in a
- the temperature and plasticity of the produced particles leaving the tube 1 can be any temperature and plasticity of the produced particles leaving the tube 1.
- processing means such as press or roller arrangements could be provided downstream of
- the post processing can be
- the tube in place of the natural convection heating air flow or to have essentially no or a
- heaters could be placed inside tube 1 if desired.
- the unused grains of the sand/salt mixture are
- the tube 1 is rotated continuously in one
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU63563/99A AU6356399A (en) | 1998-10-23 | 1999-10-25 | Method and apparatus for coating granules |
EP99950977A EP1126911A1 (en) | 1998-10-23 | 1999-10-25 | Method and apparatus for coating granules |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9823304.2 | 1998-10-23 | ||
GB9823304A GB2343389A (en) | 1998-10-23 | 1998-10-23 | Method and apparatus for coating granules |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000024504A1 true WO2000024504A1 (en) | 2000-05-04 |
Family
ID=10841226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/003524 WO2000024504A1 (en) | 1998-10-23 | 1999-10-25 | Method and apparatus for coating granules |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1126911A1 (en) |
AU (1) | AU6356399A (en) |
GB (1) | GB2343389A (en) |
WO (1) | WO2000024504A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102363333A (en) * | 2010-11-19 | 2012-02-29 | 深圳市华力兴工程塑料有限公司 | Equipment for producing inorganic matter fine particle-coated plastic particles |
CN115232466A (en) * | 2022-08-03 | 2022-10-25 | 南京铖联激光科技有限公司 | Photosensitive resin for 3D printing, preparation method and preparation device thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9902819B2 (en) * | 2009-09-14 | 2018-02-27 | The Regents Of The University Of Michigan | Dispersion method for particles in nanocomposites and method of forming nanocomposites |
CN108501239B (en) * | 2018-04-19 | 2019-04-16 | 贵州聚兴塑业有限公司 | A kind of plastic master batch preparation facilities |
US11993540B2 (en) * | 2019-04-09 | 2024-05-28 | Jonathan Cook | Waste plastic conversion |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1345811A (en) * | 1970-07-09 | 1974-02-06 | Huels Chemische Werke Ag | Free-flowing particles of solid tacky synthetic thermoplastics materials and processes for their manufacture |
GB1392261A (en) * | 1972-03-14 | 1975-04-30 | Ciba Geigy Ag | Polyamide or polyester granules on or in which are fixed dyes pigments or other additives |
WO1995009044A1 (en) * | 1993-09-29 | 1995-04-06 | E.I. Du Pont De Nemours And Company | Melt granulation with dielectric heating |
GB2302293A (en) * | 1995-06-16 | 1997-01-15 | Todd John James | Method of coating granules |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3285223A (en) * | 1963-12-09 | 1966-11-15 | Archer Daniels Midland Co | Apparatus for coating granules |
GB1211864A (en) * | 1966-10-11 | 1970-11-11 | Rank Xerox Ltd | Improvements in or relating to electrostatographic carrier beads |
FR2036402A5 (en) * | 1969-03-10 | 1970-12-24 | Progil | |
GB1476097A (en) * | 1975-02-22 | 1977-06-10 | Parker Ltd F | Production of coated aggregate material |
US4570567A (en) * | 1983-09-30 | 1986-02-18 | Olin Corporation | Air classification in a spray grainer |
US4788080A (en) * | 1987-04-27 | 1988-11-29 | Canadian Patents And Development Limited | Process and apparatus for coating particles with fine powder |
-
1998
- 1998-10-23 GB GB9823304A patent/GB2343389A/en not_active Withdrawn
-
1999
- 1999-10-25 AU AU63563/99A patent/AU6356399A/en not_active Abandoned
- 1999-10-25 EP EP99950977A patent/EP1126911A1/en not_active Withdrawn
- 1999-10-25 WO PCT/GB1999/003524 patent/WO2000024504A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1345811A (en) * | 1970-07-09 | 1974-02-06 | Huels Chemische Werke Ag | Free-flowing particles of solid tacky synthetic thermoplastics materials and processes for their manufacture |
GB1392261A (en) * | 1972-03-14 | 1975-04-30 | Ciba Geigy Ag | Polyamide or polyester granules on or in which are fixed dyes pigments or other additives |
WO1995009044A1 (en) * | 1993-09-29 | 1995-04-06 | E.I. Du Pont De Nemours And Company | Melt granulation with dielectric heating |
GB2302293A (en) * | 1995-06-16 | 1997-01-15 | Todd John James | Method of coating granules |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102363333A (en) * | 2010-11-19 | 2012-02-29 | 深圳市华力兴工程塑料有限公司 | Equipment for producing inorganic matter fine particle-coated plastic particles |
CN115232466A (en) * | 2022-08-03 | 2022-10-25 | 南京铖联激光科技有限公司 | Photosensitive resin for 3D printing, preparation method and preparation device thereof |
Also Published As
Publication number | Publication date |
---|---|
GB9823304D0 (en) | 1998-12-23 |
AU6356399A (en) | 2000-05-15 |
GB2343389A (en) | 2000-05-10 |
EP1126911A1 (en) | 2001-08-29 |
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