PAPER RECYCLING PLANTS - AR Thomson Group

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RREECCYCCLLEED PPAAPPEERR AESSEAL® PAPER RECYCLING PLANTS L-UK/US-RECYCLE-03 IN 4540 - 02/2002 6 PAPER RECYCLING PROCESS Caustic Detergent DTPA Soap Fatty Acids Calcium Sodium Silicate © Copyright 2002 AESSEAL plc All Rights Reserved. Pulper Pre Screens Flotation Fine Screens Disc Filters Washing Disperger Storage Paper Machine Peroxide Talc Dithionit Sulphuric Acid
FEEDSTOCK STORAGE The process requires massive amounts of raw material (1200 tonnes/day) which is stored in large hangar type buildings. The waste is continuously fed to the plant via mechanical shovel loaders and conveyor belts. Even at this bulk stage the mixture of paper types in the feedstock is “roughly controlled”, to be consistent with the required finished product. PULPING Typical BATCH hydropulpers. CHEST SEALING ARRANGEMENT BEARING ARRANGEMENT GEARBOX MOTOR (INDIRECT DRIVE) SAI ROTOR BOSS FLUSH SPLIT CLAMP PLATE The first processing operation is carried out in the PULPER, a cocktail of Water + Caustic Soda + Hydrogen Peroxide + Sodium Silicate + Talc + Pelletized Soap and Fatty Acids is used in conjunction with mechanical stirring (e.g. rotation of tank or rotor) to break down the DRY Cellulose fibres in the feedstock to WET Cellulose fibres separated from the coloured inks. The chemicals are added for the following reasons:- Caustic Soda . . . . . .BREAK DOWN FIBRE Soap and Fatty Acid .Initial Ink Collection Talc . . . . . . . . . . . . . .Initial Dispersing agent Sodium Silicate . . . . .WETTING AGENT Hydrogen peroxide . .BLEACHING Large unwanted debris (coarse rejects) is also removed during this process e.g. plastic bags, CD’s etc. Continuous production pulpers are becoming more popular, they are constructed as large horizontal rotating vessels rather than the vertical orientation of batch production units. © Copyright 2002 AESSEAL plc All Rights Reserved. RECCYCCLLEEDD PAAPEER AESSEAL® PAPER RECYCLING PLANTS L-UK/US-RECYCLE-03 IN 4540 - 01/2002 7
Page 1 and 2: A Guide to Sealing PAPER RECYCLING
Page 3 and 4: CONTENTS Description Page Introduct
Page 5: WHY RECLAIM? The World consumption
Page 9 and 10: Typical Fiberizer seal design Typic
Page 11 and 12: TYPICAL SCREEN SEAL DESIGNS © Copy
Page 13 and 14: DE - INKING The Thin Stock still co
Page 15 and 16: DISPERSER (DISPERGER) Even at this
Page 17 and 18: TYPICAL PUMPS USED IN A PAPER RECYC
Page 19 and 20: Typical Mechanical Seal Specificati
Page 21 and 22: Double seals will always out perfor
Page 23 and 24: Seal Locations on a Paper Recycling
Page 25 and 26: FLOTATION CELL PUMP Concentration O
Page 27 and 28: POST FLOTATION STOCK PUMP Concentra
Page 29 and 30: WASTE WATER DISPERSION PUMP Option
Page 31 and 32: FIBERIZER Option Minimum Spec. Best

PAPER RECYCLING PLANTS - AR Thomson Group

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