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Final Product: Plastic Compound
Project Scope:
Bulk bag Load-Outs (10) • Vacuum Transfer Systems (2) Each With Sequencing Valves for Receivers (5)
• Leakbreakers and Ferrous Metal Removal • PLC Controls with Graphics Panel for Operator Input
• Explosion Rupture Discs on Each Vacuum Filter Receiver • Vibrators and/or Air Cannons on Each
Receiver • Metered Refill of Loss-In-Weight Feeders with Scale Isolation and Venting
Materials Handled: Irganox • Irgafos • Calcium •
Stearate • Erucamide • BHEB • BHT • DSTOP
Solution Overview
Flexible Unloading:
Each bulk bag unloading station was installed with a combination of discharge devices to facilitate the
possible use of each unloader for different chemical additives. The bulk bag rests on a vibratory tray
with side massaging [paddles and a center outlet with an air operated slidegate. A vibrator, lumpbreaker
and magnet are installed on each vented manifold that feeds the vacuum convey systems. This combination of
flow-aid devices ensures that any materials can be unloaded through any of the stations.
Testing for Conveying and Discharge Assurance: A full-scale vacuum
conveying test was conducted in Shick's testing facility. A vacuum filter/receiver was fitted with a 70°
discharge hopper, vibrator, and air cannon to establish which chemical additives would require
which combination of flow-aid devices. All possible materials were vacuum conveyed to confirm that the
proper conveying velocity was selected. The materials that tended to bridge and pack were left in the
filter/receiver overnight to ensure that they would then discharge utilizing the selected flow-aid devices.
Complete Pre-Assembly and Wiring: Each vacuum filter/receiver was
shipped with all attachments pre-assembled and pre-wired. All butterfly valves, rotary valves, slidegates,
explosion relief discs, vibrators, air cannons, and dust collector control panels were installed and tested.
All of these devices were pre-wired with rigid conduit to numbered terminal strips in pre-mounted junction
boxes. All filtered receiving vessels were then vacuum tested for full vacuum integrity before crating and
shipping. This pre-assembly and testing ensured the end customer a lower cost, trouble-free installation
and start-up.
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