High impurity requires accurate cleaning. Peter Striegl
Requirements for a state of the art grain cleaning. Consistent and high quality of the finish products. Efficient reduction of harmful substances. Fulfillment of legal requirements. Optimization of the production costs. 2 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Overview of a Flour Mill. Grain Silo Raw Wheat bins Intake / Pre- Cleaning Cleaning / Conditioning Milling section Finished product storage & blending Flour Packing and outload Bran handling 3 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Benefit of a pre-cleaning process at intake.
Benefit of a pre-cleaning process. Local intake pit aspiration: Dust returns to the product flow. Traders, terminals; e.g. cooperatives, agricultural trade Central aspiration: Dust does not return to the product flow. Processers; e.g. flour mills, food processers 5 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Benefits of an aspirator in the pre-cleaning process. Aspirators - Reduce risk of dust explosions - Less flow problems when large bins get empty. - Increasing storage space. Fresh air, or air-recirculation aspirators are efficiently removing light impurities. Air-recirculation aspirator LAIA 6 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Pre-cleaner and aspirator. Capacity: up to 250 t/h Sieving area: up to 48 m² Durability & high operational reliability Re-use of aspiration air ensures the cost effectiveness of the cleaning process Rhino-hyde lining to provide optimum wear and noise protection Pre-Cleaner LAAB / TAS Raw material Coarse impurities Low-density material Fine impurities Clean product 7 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Pre-cleaner and aspirator. 1 4 2 3 5 7 6 1 Product inlet 2 Distribution flap 3 Inlet aspiration 4 Expansion chambers with discharge screws 5 Product distribution onto sieves 6 Outlet aspiration 7 Exhaust air 8 Screen box drive A 1. grade B 2. grade C Coarse particles 8 C B A 8 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
1st Cleaning Line
State of the art grain cleaning concepts with large sieve surface and optical sorting. Elevator MGEL Elevator MGEL Vega-Cleaner High Capacity Air Separator MTVA Scale MSDL Magnet MMUA Intermediate Separator MANB Liquid Flow Controller MOZG Dampener MOZL Screw Conveyor NFAT Concept with high performance and accurate sorting. Raw Wheat Bins High-Level Indicator Elevator MGEL Fan MHTP Destoner MTSC High Capacity Grain Cleaner MTVA Fan MHTP Destoner MTSC Tempering Bins High-Level Indicator Separation of light-, coarseand fine impurities. Separation of Soya beans, Maize, etc. possible. Low-Level Indicator Outlet Hopper MFAK Flow Balancer MZAH S Optical Sorter SORTEX Depot Sortex Optical sorting of the whole product flow. Screw Conveyor NFAT Autom. Moisture Controller MYFD 10 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Concept for wheat cleaning with high amount of stones and sand. 11 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Removal of impurities and light product. Raw grain Light product Dust Spelt Shriveled kernels Coarse impurities Maize Soya beans Sunflower kernels Large grain Option: grain classification Medium grain small grain Fine impurities Sand Weed seeds 12 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
De-stoner. Working principle Specific weight gravity separation For the removal of stones and heavy particles (metal / glass) 13 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Combi-stoner / Functions: Two machines in one. exhaust air raw material mixed product stones, glass, etc. heavy product 14 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Air Recycling Separator
Air recycling separator. Aspiration Filter drum SW:0.5mm Aspiration Frequency control Air from machine Air back to machine Light impurities 16 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Precise classification of grain.
Precise removal of all discolored particles. 18 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Optical Sorter SORTEX. Dark defects Input Foreign grain + seeds Ergot Discoloured grains Light defects Ligth Braid Spelt, Straw Accept Reject Foreign material, unhealthy wheat Semi-transparent Stones, Glas, Plastics Mycotoxin damaged Diseased kernels 19 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Dark- / Light- / Infrared Sort infrared sort camera dark sort camera Foreground Lighting 1 color light sort camera dark sort camera 20 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
2nd Cleaning line Equipment installed: Magnet Dry scourer Grain sterilator (optional) Aspiration channel B1 dampening (optional) 1 st break bin 1 st break scale 21 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Scourer. Working principle Friction of 1. Grain against screen 2. Grain against rotor segments 3. Grain against grain Important: Aspiration channel after scourer for removal of remaining dust 22 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Grain Sterilator. Grain Sterilator Grain sterilator for Insect reduction in the Mill Breaks open kernels that contain insects and are thus structurally weakened Improvement of Filth Test 23 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
% AMB High impurity requires accurate cleaning. Reduction of bacteria count. 100 80 60 40 20 0 Raw wheat After 1 st Cleaning After tempering After 2 nd Cleaning Flour 24 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
Summery. Accurate cleaning starts at the intake. Concept of Cleaning Line needs to be adapted to the raw wheat used and the finish products produced. Reduction of harmful substances / Fulfillment of legal requirements. High efficient cleaning line is enhancing the food safety. 25 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016
One step ahead. 26 Bühler IAOM / 1st Middle East Regional Forum / Cairo / 2016