Chemical Engineering April 2023 - 54

Solids Processing 2023 Special Advertising Section
Unique Vibra Screw system provides consistent flow of
material from bins to belts
A
challenge many engineers face when designing
and specifying a bulk solids handling
system is ensuring an even, continuous
flow of materials from a storage bin or silo onto
a conveyor or weigh belt feeder. Many materials
tend to bridge, rat hole, or clog before being
discharged from storage, which can result in an
uneven, interrupted flow, negatively impacting
operational quality and production schedules.
Fortunately, Vibra Screw has engineered a
unique solution for difficult materials handling
challenges. Storage bins in systems handling
stubborn materials can be equipped with a
Vibra Screw bin activator and a vibrating discharge
nozzle to provide an even flow with plus/minus 1-2 percent
accuracy onto a weigh belt feeder or conveyor.
The original patented dished head bin activator by Vibra Screw
has proven to be efficient, convenient, and economical for moving dry
bulk materials out of storage on demand. When mounted on the conical
section of a new or existing static bin, it helps meet the challenge
of assuring continuous flow and preventing additional material load
onto a belt feeder from the head load. This is particularly important
during initial start-ups.
Vibration is applied to the flexibly mounted
bin bottom by a Vibra Screw gyrator. A baffle
located in the bin activator relieves head load
pressure and imparts vibratory forces into the
material. Isolators confine vibration to the bin
activator and eliminate vibration transmission
to the bin itself.
When a Vibra Screw vibrating discharge nozzle
is used in conjunction with the bin activator,
a reliable method for feeding materials onto
the belt is provided. The vibrating nozzle further
prevents material from hanging up in the
bin or flooding uncontrollably as it is discharged
and turns 90 degrees across a conveyor or belt
surface.
The consistency of the material flowing downstream can be further
enhanced when a Vibra Screw weigh belt feeder is incorporated
into systems. These feeders are designed to convey a wide range of
materials, including powder, grains, flakes, and pellets. They can be
used as an integrator to monitor material weight and rate flow, or as
a weigh feeder to precisely control material flow by weight into process.
The unique weigh system reduces dead load and applies live
load directly to two platform load cells, which are externally mounted
for easy access and maintenance.
www.vibrascrew.com
HDP 4000 Full-Line Concept System
D
ynamic Air dense phase pneumatic
conveying systems have been
proven in over 15,000 installations
worldwide. They handle a wide range
of materials and bulk densities at rates
from a few hundred pounds to 400
tons per hour, over distances exceeding
5,000 feet. The HDP 4000 Full-Line
Concept dense phase pneumatic conveying
system has many advantages
over more traditional dense phase
concepts with regard to degradation
and energy consumption. The system
utilizes the DC-5 Air Saver technology
to achieve an optimum pressure balance
while counteracting forces of friction.
The Full-Line Concept system conveys materials at low velocity and high density
while utilizing very low air consumption. The enclosed system is clean and can be fully
automated to convey to packaging or process bins. Very few moving parts are utilized,
as the prime mover is standard plant compressed air at 100 PSIG. Dynamic Air Full Line
Concept systems have proven to be very low in maintenance and are very flexible with
regard to space and various custom plant situations.
www.dynamicair.com
Dynamic Air HDP 4000 Full Line Concept
dense phase pneumatic conveying system
54
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
APRIL 2023
http://www.vibrascrew.com http://www.dynamicair.com http://WWW.CHEMENGONLINE.COM
Chemical Engineering April 2023

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