Drag Chain Conversion

TITLE: Drag Chain Conversion

LOCATION: Castle Dale, Utah

Fee: $782,000

A power plant in Castle Dale, Utah needed to replace the submerged drag chain conveyor (SDCC) and hired PSE to complete the engineering.  The scope of work included the replacement of  the SDCC under the boiler; two conveyors to transport ash from under the economizer into the new SDCC; the replacement of  sump pumps; and powering the SDCC hydraulic skid, new pumps and new lighting.  The project included 3D model rerouting of piping, moving, adjusting and designing platforms, rerouting of electrical cable tray, conduit and wiring, analyzing impact on structural steel, designing and developing large concrete ash bunker plans and load-out headhouse.  

PSE was responsible for piping design (including rerouting various piping systems to tie in the drag chain connections); rerouting platforms, stairways, and ducting; creating pipe supports; designing support concrete footings and floors; creating new electrical cabinet design and layout; and providing a geotechnical analysis for the site. A point cloud and 3D model were also used to check for interferences between the new drag chain and the existing plant systems. In addition, PSE provided plans to move underground utilities including managing the potholing process to locate underground utilities and piping.