Chemical Engineering June 2020 - 18

Focus
Focus on Milling
Gericke USA
Van Tongeren America
Explosion vent
panels ODV
Bag house
Raw coal/
wood silo
Flameless
venting with
Q-ROHR
Explosion vent
panels EGV
Vertical
mill
Pulverised
coal/wood
silo
Explosion
vent panels
EDP
Milling systems adjust at top
for safety and efficiency
This company recently unveiled a line
of cone mills (photo) for fine-particle
size reduction. Developed for milling
materials from 150 μm to 12 mm,
these cone mills feature a patented
design that allows the gap between
the rotor and screen to be quickly
adjusted based on the targeted particle
size and shape from outside the
machine without requiring any disassembly
or contact with the cutting
chamber. With a built-in gap-adjustment
indicator verifying the selected
particle size, efficiency, versatility and
worker safety are achieved. The cone
mills move dry, moist, fatty, sticky
and heat-sensitive materials over a
conical, serrated screen, passing onspec
particles through to discharge
and recirculating larger particles back
to the cutting chamber for further size
reduction. Creating a high-impact
cutting action at a low velocity, the
cone mills quickly advance the material
through the grinding zone with
minimal heat, dust or noise generation.
Available in three standard models,
the cone milling equipment includes
a quick-release access to the
cutting chamber and rotor assembly
for safe, easy cleaning and screen
changes, plus food-quality seals and
a choice of screen sizes, hole shapes
and patterns. Custom-engineered
models and a variety of custom options
are available. - Gericke USA,
Inc., Somerset, N.J.
www.gerickegroup.com
A classifier for
Rembe
separating dry particles
This company has launched a Centrifugal
Classifier (CC; photo) that
harnesses air, gravity and centrifugal
force to automatically separate dry
particles without any water. Featuring
a proprietary design, the pneumatic-air
classifier separates the feed
material from the airstream and redirects
the air into a curtain of material
to create a scrubbing action that directs
larger particles to the discharge
outlet and directs fine particles into
a controlled vortex en route to dis18
charge
with the airstream to a dust
collector. Designed with no moving
parts, the CC offers an efficient alternative
to screening machines with
virtually no maintenance, no work
stoppages for screen cleaning and
replacement, and at lower initial and
operating costs. Developed for classifying
cement, alumina, salt, potash,
limestone, fertilizer and other materials,
the CC separates dry particles at
any cut point between 100 to 15 μm.
The classification system is customdesigned
and manufactured for each
installation to meet target production
goals and material specifications,
and is proven to perform continuously
in unattended, continuous operation.
- Van Tongeren America,
LLC, Lebanon, Pa.
www.van-tongeren.com
Explosion protect the milling
area of a co-firing power plant
This company has developed a new
safety approach for protecting coal
or wood grinding plants against the
ravages of a combustible-dust explosion.
Through the combination
of standard explosion panels and
flameless venting, protection can be
guaranteed. The system (photo)is
composed of the following components:
the flameless venting technology,
which enables indoor venting in
the rolling-mill building; to protect the
baghouse and isolate the inlet ductwork
from a combustible dust explosion,
standards panels, such as the
company's ODV and EDP, can be
utilized; finally, the storage silo can
also be protected by standard vent
panels. In the case of silos, there
is little to no vacuum pressure in a
silo so an EGV device can properly
protect this enclosure. Isolation protection
is also required to stop the
propagation of any combustible dust
explosion - this can be accomplished
through numerous passive
approaches. Also, if the filter and silo
happen to be located indoors, then
they can also be protected by flameless
venting devices. - Rembe Inc.,
Charlotte, N.C.
www.rembe.us
ChemiCal engineering www.Chemengonline.Com June 2020
http://www.van-tongeren.com http://www.gerickegroup.com http://www.rembe.us http://www.Chemengonline.Com
Chemical Engineering June 2020

Table of Contents for the Digital Edition of Chemical Engineering June 2020
