flo way presentation

7/21/2019 Flo Way Presentation

http://slidepdf.com/reader/full/flo-way-presentation 1/33

Solids Flowmeters 1

Belt-Way Scales Inc.

Applying The Product

Prefeed Devices

Product Selection and Sizing

Flowmeter Accuracy

Information Required

FlowmetersFlo-way

R



Solids Flowmeters 2


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



Solids Flowmeters 3


Reverse Flowguide Transition

Reverses directionof the material

Forces material into

desirable flowpattern

Important for high

or variable speedfeeders



Solids Flowmeters 4


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]



Solids Flowmeters 5


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



Solids Flowmeters 6


Bucket Elevators

Common for grain Slow elevators produce

heavily pulsing material

discharge requiringdamping

Fast elevators often

require dead box toreduce velocity



Solids Flowmeters 7


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



Solids Flowmeters 8


Drag Conveyors

Constant and low velocity

Feeder discharge damping or a dischargebaffle should be used to minimise the pulsingmaterial discharge



Solids Flowmeters 10


Pulsing Feeder Discharge Damping

Temporary holding bin

Manual/automatic control

Bin can be used forintegrator on-linecalibration





Pulsing Feeder Discharge Damping

Baffle platerecommended fordrag conveyors

Reduces heavymaterial pulsing

baffle

conveyordischarge

slats

Top view





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)





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)





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





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





Factors to be Considered

Material : flowrate

particle size flowability

bulk density

temperature

abrasiveness

corrosivenessarea

classification

headroom

environment

Flowmeter Selection Guide





Factors to be Considered

Prefeeder : type

size

speedAccuracy Required

Vibrations .......etc





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”





Factors Affecting Accuracy

Changes in Materials:Velocity

Angle to sensing plateEnergy absorbing characteristics

Co-efficient of friction

Air flow past sensing plate





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





Can These Factors beControlled ?

Velocity and angle by properly designedflowguides and mechanical equipment

arrangement





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 ?





Flow Characteristics

Flowability ? Do flow characteristics change ?

Does material build upon impact ?

Abrasiveness ?





Other Material Properties

Hygroscopic ?

Corrosive ?

Easily Aerated ?

Explosive ?

Other ?

Moisture Content ?





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 ?





Installation pictures:

Blending Application in Texas





Cement Plant in Turkey





Mobile Transition conveyors

Used throughout the USA





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

[email protected]:

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.

flo way presentation

Documents