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7/21/2019 Flo Way Presentation
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Solids Flowmeters 1
Belt-Way Scales Inc.
Applying The Product
Prefeed Devices
Product Selection and Sizing
Flowmeter Accuracy
Information Required
FlowmetersFlo-way
R
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Solids Flowmeters 2
Belt-Way Scales Inc.
Forward Flowguide Transition
Maintains material inthe same direction
Low and constant
velocity feeders Baffle plate may be
used for high or
variable speed feeders
Baffle
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Solids Flowmeters 3
Belt-Way Scales Inc.
Reverse Flowguide Transition
Reverses directionof the material
Forces material into
desirable flowpattern
Important for high
or variable speedfeeders
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Solids Flowmeters 4
Belt-Way Scales Inc.
Screw Conveyor
Short pitch or double flightpreferred
Cut back flights of standard
screw Reduces batch size plus
increases discharge pulse
frequency Reverse flowguide transition
for variable or constant
speeds above 40 rpm
short pitch
double flight
[Most common type of material feeder]
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Solids Flowmeters 5
Belt-Way Scales Inc.
Rotary Feeder
Provide air seal May be required if material is
pneumatically conveyed orflowmeter/process isolationrequired
Reverse flowguide transitionfor variable or constant speedsabove 10 rpm
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Solids Flowmeters 6
Belt-Way Scales Inc.
Bucket Elevators
Common for grain Slow elevators produce
heavily pulsing material
discharge requiringdamping
Fast elevators often
require dead box toreduce velocity
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Solids Flowmeters 7
Belt-Way Scales Inc.
Conveyor Belts
Generally non-pulsing material discharge, idealfor flowmeter operation
Reverse flowguide transition (and/or materialdischarge baffle) for variable belt speeds orconstant speeds over 1 m/s
materialdischargebaffle
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Solids Flowmeters 8
Belt-Way Scales Inc.
Drag Conveyors
Constant and low velocity
Feeder discharge damping or a dischargebaffle should be used to minimise the pulsingmaterial discharge
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Solids Flowmeters 10
Belt-Way Scales Inc.
Pulsing Feeder Discharge Damping
Temporary holding bin
Manual/automatic control
Bin can be used forintegrator on-linecalibration
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Solids Flowmeters 11
Belt-Way Scales Inc.
Pulsing Feeder Discharge Damping
Baffle platerecommended fordrag conveyors
Reduces heavymaterial pulsing
baffle
conveyordischarge
slats
Top view
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Solids Flowmeters 12
Belt-Way Scales Inc.
Short Fall Chutes
Bin/feeder discharge lessthan 0.6m (2ft)
Ideal, as velocity due to
gravity is minimal Centreline and angle to
coincide with flowguide
for distance greater than orequal to flowguidediameter
<0.6m(2ft)
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Solids Flowmeters 13
Belt-Way Scales Inc.
Long Fall Chutes
Bin/feeder discharge morethan 0.6m (2ft)
Material velocity increased
Increased flowmetercomponent abrasion
Adaptations may be
required to settle materialinto desirable flow patterns
>0.6m (2ft)
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Solids Flowmeters 15
Belt-Way Scales Inc.
Deadbox
May be installed wherechute angle changes
Material impacts on itself
Should be used where Material velocity is high
Material velocity is variable
Long fall chute angle changes Material is very abrasive
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Solids Flowmeters 16
Belt-Way Scales Inc.
Feed/Discharge Air Pressure
Differential air pressureanticipated then in-feed
and discharge chutesshould be vented tocommon dust collector
Balance air pressure by tuning gates If no dust collector then use air bypass
chute
to
commondustcollector
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Solids Flowmeters 17
Belt-Way Scales Inc.
Factors to be Considered
Material : flowrate
particle size flowability
bulk density
temperature
abrasiveness
corrosivenessarea
classification
headroom
environment
Flowmeter Selection Guide
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Solids Flowmeters 18
Belt-Way Scales Inc.
Factors to be Considered
Prefeeder : type
size
speedAccuracy Required
Vibrations .......etc
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Solids Flowmeters 19
Belt-Way Scales Inc.
Model Selection Guide0
0.5
1.0
1.5
2.050 100 150 200 250 300 350
MTPH
B
u l k D e n s i t y t / m . c u
8” 10” 12”6”
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Solids Flowmeters 20
Belt-Way Scales Inc.
Factors Affecting Accuracy
Changes in Materials:Velocity
Angle to sensing plateEnergy absorbing characteristics
Co-efficient of friction
Air flow past sensing plate
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Solids Flowmeters 21
Belt-Way Scales Inc.
What Material CharacteristicChanges Affect Accuracy?
Particle Hardness? YES Particle shape? YES
Particle size? NO (within reasonable limits
if shape and hardness remain constant)
Bulk density? NO (if hardness and shaperemain constant)
Moisture? Only if hardness and flowabilityare affected
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Solids Flowmeters 22
Belt-Way Scales Inc.
Can These Factors beControlled ?
Velocity and angle by properly designedflowguides and mechanical equipment
arrangement
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Solids Flowmeters 23
Belt-Way Scales Inc.
Physical characteristics• Cannot be controlled by us
• Compensate with linearisation
Airflow
• Must be eliminated or diverted
Flow characteristics• Compensate with linearisation
Can These Factors beControlled ?
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Solids Flowmeters 25
Belt-Way Scales Inc.
Flow Characteristics
Flowability ? Do flow characteristics change ?
Does material build upon impact ?
Abrasiveness ?
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Solids Flowmeters 26
Belt-Way Scales Inc.
Other Material Properties
Hygroscopic ?
Corrosive ?
Easily Aerated ?
Explosive ?
Other ?
Moisture Content ?
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Solids Flowmeters 27
Belt-Way Scales Inc.
System Requirements
Feed Rate ? Accuracy required ?
Can material tests
be performed ? Type of prefeed
device ?
Will feed be uniform ? Feed run time ?
Will material be subject
to aeration ?
Will sensing plate besubject to airflow ?
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Solids Flowmeters 29
Belt-Way Scales Inc.
Installation pictures:
Blending Application in Texas
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Solids Flowmeters 30
Belt-Way Scales Inc.
Cement Plant in Turkey
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Solids Flowmeters 32
Belt-Way Scales Inc.
Mobile Transition conveyors
Used throughout the USA
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Solids Flowmeters 33
Belt-Way Scales Inc.
B e l t W a y Sc a l e s I n c .
One Belt Way
Rock Falls, IL 61071 USA
Phone: 815) 625-5573
Fax: 815) 625-5593
The Flo-way Solids Impact Flowmeter
system is this an accurate and dependableindustrial weighing device. It was developedto meet the needs of material producersthroughout the world.