Feed Strategy - April 2018 - 40
40 ❙ FeedStrategy
NEW ECONOMICAL DESIGNS
wide flat side as opposed to narrow cylindrical tubes are
particularly well suited to this task, as the flat side provides
a more violent and therefore more efficient cleaning action.
■ Cartridge collectors
Cartridge dust collectors utilize rigid pleated filter
elements that provide up to 20 times the filter area of baghouse collectors in a smaller package, reducing the number of filter elements. Cartridge medias also offer much
higher filtration efficiencies, which handle fine particulate
more effectively and also provide superior dust cake release for free-flowing dusts.
Horizontal cartridge orientation allows for a downward
flow pattern within the collector housing that enhances
dust cake release and minimizes re-entrainment of dust
onto filter elements. The result is smaller collectors able
to handle higher airflows with higher efficiency, reduced
compressed air consumption, easier filter changes with
fewer filter changes, and fewer filters to replace.
Advances in filter design
Because of the large capital investment, manufacturers
are constantly looking at new designs that are economical.
New filter designs is one example:
■ Pleated filters
New pleated filter bags by Donaldson Company offer a hybrid of baghouse and cartridge benefits. The bags
provide the ability of felt bags to handle some agglomerative dusts with the efficiency and increased capacity of
cartridge dust collectors. New pleated filters also have an
Ultra-Web on the outside that increases filter efficiency -
the ability to capture a higher percentage of particles.
"The Ultra-Web emits 94 percent fewer emissions
than other bags and has 87 percent fewer pulses," said
Donaldson Company product manager Joe Kiolbasa.
■ Medium pressure air filters
A new medium-pressure dust collector by
Schenck Process uses intelligent design to eliminate the
need for plant compressed air for pulsing the filters.
"We are able to reduce the amount of pressure needed
to pulse the filters by using a higher volume of air supplied by a positive displacement blower," says Schenck
Process global product director Steve McConnell. The
filters use 7-9 psi instead of 90 psi.
"This system offers up to 50 percent cost savings for
mills," McConnell said.
Sustainable dust control
New technology has made traditional baghouse
collectors more efficient at controlling dust and
more economical to run. Courtesy Donaldson-Torit
Regulations and risk mitigation are just part of dust
control. It is also a sustainability issue that helps to improve the health for employees and the environment for
www.WATTAgNet.com ❙ April 2018