Granulation process and types of granulators

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granulation & its types
granulators & their types

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Granulation process and types of granulators

  1. 1. Granulation 1 Presented by: Syed Waqas Haider Process Engineer
  2. 2. Definition  Granulation is the process of collecting particles together by creating bonds between them. Bonds are formed by compression or by using a binding agent 2
  3. 3. Types of Granulation 3  Dry Granulation without using a liquid solution  Wet Granulation addition of a liquid solution (with or without binder)
  4. 4. Dry Granulation 4  Primary powder particles are aggregated under high pressure Roller Compaction • Powder is squeezed between two rollers to produce sheet of material Slugging • Large tablets produce in heavy duty tablet press Dry granulation
  5. 5. Wet Granulation 5  This class of process includes Fluid beds, tumbling drums & pans, and mixer-granulators Mechanism  Wetting, nucleation and binder distribution  Consolidation and growth  Attrition and breakage
  6. 6. Fluidized bed Granulation 6  Granulation and drying in the same equipment  Granulation is controlled by moisture content of the bed  Too high moisture content will defluidize the bed and in too low moisture, no agglomeration will occur  Granules obtained are more porous than those obtained from shear mixers
  7. 7. Fluidized bed Granulator 7 Spray Arrangements
  8. 8. Tumbling Granulation 8  Particles are set in motion by the tumbling action caused by the balance between gravity and centrifugal forces  Includes discs, drums, pans and a range of similar equipment
  9. 9. Characteristics of tumbling granulators 9  Product granule size in the range of 2 to 20mm  Not suitable for producing very small granules  Good for producing high density balls or pallets  Capable of handling very large throughputs  Extensively used in mineral processing and fertilizer granulation
  10. 10. Disc Granulator 10  Rotating disc with a rim to hold the tumbling granules  Powder feed continuously fed to the disc, typically at the edge of the rotating granulator bed  Liquid binder is added through a series of single fluid nozzles distributed across the face of the bed
  11. 11. Drum granulator 11  Typically used for high capacity applications and usually requires some type of recycle depending on the product specification  Granulation where the only feed or the majority of the feed is a liquid or melt such as urea granulation  Feeds may be either pre-moistened by mixers to form granule nuclei or liquid may be sprayed onto the tumbling bed via nozzles or distributor pipe system  Scrapers are often but not always used to limit build up on the drum wall
  12. 12. Drum Granulator 12
  13. 13. Mixer-Granulator 13  The High Shear Mixer-Granulator is a multi-purpose processor equally suitable for high speed dispersion of dry powders, and aqueous or solvent granulations  Melt Granulation: Melt agglomeration is a process by which agglomeration is obtained through the addition of either a molten binder liquid or a solid binder which melts during the process  Agglomerates are formed by agitation of the mixture  The mechanism of melt granulation is similar to that of wet granulation
  14. 14. Mixer-Granulator 14
  15. 15. Double shaft paddle Mixer-Granulator 15  Dual counter-rotating shafts run the length of the device  The paddles move material from the bottom of the trough, up the middle, and back down the sides creating a kneading and folding effect that intimately mixes the material  Typical Use: Mixing, conditioning, or agglomerating
  16. 16. 4/20/2014 Granulators in different Industries
  17. 17. References 17  The Science and Engineering of granulation- (books.google.com)  Granulation - (books.google.com)  http://www.slideshare.net/NAMDEOSHINDE15/gran ulation-ppt  http://www.fertilizermachine.org/rotary-drum- granulator.html  http://www.slideshare.net/svpv14/characterization-of- granules  http://feeco.com/2013/12/27/choosing-industrial- mixer-pin-mixers-paddle-mixers/  http://www.scribd.com/doc/113643719/PPT-Wet- Granulation

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