Granulation process and types of granulators

granulation & its types
granulators & their types

1. Granulation 1 Presented by: Syed Waqas Haider Process Engineer

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. Types of Granulation 3 Dry Granulation without using a liquid solution Wet Granulation addition of a liquid solution (with or without binder)

4. Dry Granulation 4 Primary powder particles are aggregated under high pressure D ry granulation

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. 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. Fluidized bed Granulator 7 Spray Arrangements

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. 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. Disc Granulator 10 R otating 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. Drum granulator 11 T ypically 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. Drum Granulator 12

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. Mixer-Granulator 14

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. 20-Apr-14 Granulators in different Industries

17. References 17 The Science and Engineering of granulation-(books.google.com) Granulation - ( books.google.com ) http :// www.slideshare.net/NAMDEOSHINDE15/granulation-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