High impurity
requires accurate
cleaning.
Peter Striegl
2 | © Bühler |
High impurity requires accurate cleaning.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.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
3 | © Bühler |
Grain Silo
Raw Wheat bins
Cleaning /
Conditioning
Milling
section
Finished
product
storage &
blendingFlour
Packing
and
outload
Bran
handling
IAOM / 1st Middle East Regional Forum / Cairo / 2016
High impurity requires accurate cleaning.Overview of a Flour Mill.
Intake / Pre-
Cleaning
Benefit of a
pre-cleaning
process at intake.
5 | © Bühler |
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
High impurity requires accurate cleaning.Benefit of a pre-cleaning process.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
6 | © Bühler |
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.
High impurity requires accurate cleaning. Benefits of an aspirator in the pre-cleaning process.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Air-recirculation aspirator LAIA
7 | © Bühler |
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
Coarse impurities Low-density material Fine impurities Clean productRaw material
High impurity requires accurate cleaning.Pre-cleaner and aspirator.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Pre-Cleaner LAAB / TAS
8 | © Bühler |
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
1
2
3
4
5
7
6
8
C B A
High impurity requires accurate cleaning. Pre-cleaner and aspirator.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
1st Cleaning Line
10 | © Bühler |
High impurity requires accurate cleaning.State of the art grain cleaning concepts with large sieve surface and
optical sorting.
FanMHTP
S
Elevator
MGEL
IntermediateSeparator
MANB
FanMHTP
High CapacityAir Separator
MTVA
High Capacity Grain Cleaner MTVA
DestonerMTSC
DestonerMTSC
MagnetMMUA
Raw
Wheat
Bins
Screw
Conveyor
NFAT
Autom.Moisture Controller
MYFD
Outlet HopperMFAK
Flow
Balancer
MZAH
High-Level
Indicator
ScaleMSDL Dampener
MOZL
Tempering Bins
Depot
Elevator
MGEL
Elevator
MGEL
Liquid Flow ControllerMOZG
Low-Level
Indicator
Optical SorterSORTEX
Screw Conveyor
NFAT
High-Level Indicator
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Vega-Cleaner
Concept with high
performance and accurate
sorting.
Separation of light-, coarse-
and fine impurities.
Separation of Soya beans,
Maize, etc. possible.
Sortex
Optical sorting of the whole
product flow.
11 | © Bühler |
High impurity requires accurate cleaning.Concept for wheat cleaning with high amount of stones and sand.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
12 | © Bühler |
High impurity requires accurate cleaning.
Removal of impurities and light product.
Coarse impurities
Maize
Soya beans
Sunflower kernels
Light product
Dust
Spelt
Shriveled kernels
Fine impurities
Sand
Weed seeds
Raw grain
Option: grain classification
Medium grain small grainLarge grain
IAOM / 1st Middle East Regional Forum / Cairo / 2016
13 | © Bühler |
High impurity requires accurate cleaning. De-stoner.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Working principle
Specific weight – gravity separation
For the removal of
stones and
heavy particles (metal / glass)
14 | © Bühler |
High impurity requires accurate cleaning. Combi-stoner / Functions: Two machines in one.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
exhaust air
raw material
mixed product
stones, glass,
etc. heavy product
Air Recycling
Separator
16 | © Bühler |16 | © Bühler |
High impurity requires accurate cleaning. Air recycling separator.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Filter drum SW:0.5mm
Aspiration
Aspiration
Air from
machine
Air back to machine Light impurities
Frequency
control
Precise
classification of
grain.
18 | © Bühler |
High impurity requires accurate cleaning. Precise removal of all discolored particles.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
19 | © Bühler |
Input
Accept Reject
Discoloured grains
Ligth Braid
Spelt, Straw
Semi-transparent
Stones, Glas, Plastics
Mycotoxin damaged
Diseased kernels
Ergot
Foreign grain +
seeds
Dark defects
Light defects
Foreign material, unhealthy wheat
High impurity requires accurate cleaning.
Optical Sorter SORTEX.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
20 | © Bühler |
High impurity requires accurate cleaning. Dark- / Light- / Infrared Sort
IAOM / 1st Middle East Regional Forum / Cairo / 2016
▼ Foreground Lighting 1 color
dark sort camera ►
◄ dark sort camera
◄ light sort camera
infrared sort camera ►
21 | © Bühler | IAOM / 1st Middle East Regional Forum / Cairo / 2016
High impurity requires accurate cleaning.2nd Cleaning line
Equipment installed:
Magnet
Dry scourer
Grain sterilator (optional)
Aspiration channel
B1 dampening (optional)
1st break bin
1st break scale
22 | © Bühler |22 | © Bühler |
High impurity requires accurate cleaning. Scourer.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
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
23 | © Bühler |23 | © Bühler |
High impurity requires accurate cleaning. Grain Sterilator.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
Grain sterilator for Insect reduction in the Mill
Breaks open kernels that contain insects and are thus structurally weakened
Improvement of Filth Test
Grain Sterilator
24 | © Bühler |24 | © Bühler |
High impurity requires accurate cleaning. Reduction of bacteria count.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
0
20
40
60
80
100
After
1st Cleaning
After
tempering
FlourRaw wheat After
2nd Cleaning
% A
MB
25 | © Bühler |25 | © Bühler |
High impurity requires accurate cleaning.Summery.
IAOM / 1st Middle East Regional Forum / Cairo / 2016
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.
26 | © Bühler |26 | © Bühler |
One step ahead.
IAOM / 1st Middle East Regional Forum / Cairo / 2016