One of Griffin's customers from a southeastern
state uses a process that recompounds plastic pellets with an additive which
creates a new polymer with different characteristics. The recompounding process
operates at an elevated temperature of 280° F and includes a pneumatic conveying
system to move the pellets within the plant. A filter receiver is installed at
the end of the pneumatic line. The original filter receiver, not manufactured by
Griffin, had been installed by the pneumatics supplier and was misapplied from
the start. It used pleated media which plugged constantly, causing the
production line to be shut down and taxing the company's maintenance budget with
the repeated filter change-outs.
Prior to meeting with Griffin engineers,
the customer had been addressing the dust problem simply but ineffectively by
making frequent filter replacements. This was an unacceptable solution, not only
because of the company's lost production time, but also because of the cost of
labor and materials to replace the filters.
The customer contacted
Griffin's local representative, Scott Wells of Lecorp, Inc. (TN) to tackle the
problem since Scott had previously sold them other Griffin equipment. Griffin
and Scott Wells recommended that a new filter receiver with more capacity that
the existing unit to be installed. The customer was already familiar with
Griffin's product reliability, durability and competitive prices. They also
wanted the ability to have interchangeable parts with collectors installed on
other product lines. For this project, Griffin engineers selected a Griffin
Model CV-30-L.
The CV-30-L has several features which helped solve this
customer's problem.
- A properly designed material deflector inlet section
helps direct a majority of the heavy dust load down to the hopper where it is
discharged from the collector without contacting the filter media.
- The 51" bag length and selection of singed polyester
felt allows the pulse cleaning to work efficiently.
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- The unit is designed to keep the interstitial
velocity within the collector low, avoiding re-entrainment of dust pulsed off
the bags during cleaning.
- The hopper level indicator adds an extra measure of
insurance that there won't be dust build-up in the hopper.
Since the installation
of the Griffin collector, maintenance has been reduced to a minimum. The
customer will continue to purchase pneumatics systems from their supplier, but
they will specify that a Griffin filter receiver must be used.
This cylindrical filter receiver, model CV-30-L, is installed at the end
of a pneumatic line. By replacing an improperly sized competitor's unit, Griffin
was able to increase the unit's capacity and reduce the maintenance
costs.
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