KWS Manufacturing

Jacketed Trough Screw Conveyor

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Jacketed Trough Screw Conveyor: Sotera Defense SolutionsOwner

Sotera Defense Solutions
Easton, MD 21601

General Description

A solution was needed for conveying and heating shredded paper and plastic waste. KWS worked closely with Sotera Defense Solutions to design a unique conveyor for the application. Wet waste gets fed into a shredder and then discharged into the inclined jacketed screw conveyor. Hot heat transfer media is pumped into the jacketed trough to heat the internal surfaces of the screw conveyor and remove moisture from the waste. The waste is then discharged into a briquette forming machine to create briquettes that are used as an alternative fuel.

Design Parameters

  1. Product Type: Shredded Paper and Plastic Waste
  2. Material Density: 17 Lbs. per Cubic Foot
  3. Conveyor Capacity: 15 Cubic feet per Hour
  4. Moisture Content: 39%
  5. Duty: 8 to 24 Hours per Day, 7 Days per Week

KWS Advantages

KWS assisted Sotera Defense Solutions in providing a complete system for processing a waste product and creating an alternative fuel source. Engineers from both companies worked together to meet the design application parameters and space constraints. Our ability to provide solid modeling proved to be a great asset in shortening the design and manufacturing cycle times. Also, our knowledge of heat transfer helped produce a low-moisture end product.

Special Features

The conveyor was designed to install into a shipping container with the shredder and briquette forming machine for easy transport to other locations. A special 90 degree transition chute was made to connect the discharge of the shredder to the inlet of the screw conveyor to keep the inlet height of the shredder inside the shipping container. The screw was made with lifting bars welded between the flights to mix the shredded waste and get more drying out of the conveyor than just heating the product with the jacketed trough.


"Everything looks good; KWS met our tight delivery schedule."

Stuart Jarratt, Project Manager – Sotera Defense Solutions (2013)


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