Laserfiche WebLink
April 1992 MR-19 Pneumatic Coal Drying lnstaHation • Page ~ 4 <br />INSTALL CYCLONE DRYER <br />Current plans call for installation of the pneumatic cyclone dryer within a protettive enclosure <br />at the top of the surge bin. The cyclone will receive coal from the pneumatic transfer pipeline, <br />sepazate surface moisture from the coal by the combined effects of centrifugal force and air <br />drying, and discharge the dried coal to the surge bin. The ryclone and associated blower unit <br />will connect to the existing electrical power source at the truck scale. 7 <br />IPSs <br />The ryclone has been designed and tested to remove all coal particles greater than 1 micron from <br />the feed-stream. Moisture removed from the coal will discharge from the ryclone as water vapor <br />along with negligible amounts of any -1 micron coal which may be in the feed-stream. Given <br />that any discharge of -1 micron coal will be negligible and this material will be discharged along <br />with water vapor, discharge should not result in any significant fugitive dust emissions and no <br />modification of EFCI's existing air quality permits should be required. <br />ERECT PNEUMATIC PIPELINE, WALKWAY AND SUPPORT STRUCTURES <br />Coal will be transported to the ryclone dryer and hopper through an 8-inch pneumatic pipeline <br />approximately 210 feet long. The pipeline will be carried by an integrated <br />truss/walkway/pipelinestructurewhichwill bepre-fabricated in four sections. The truss sections <br />will be supported by three 24 inch, concrete filled s[eel columns. The integrated <br />truss/walkway/pipeline structure will attach to and be supported at either end by the hopper <br />structure and the existing truck tunnel. <br />INSTALL MODULAR FEEDER AND PUMP SYSTEMS <br />The heart of the coal transport system will be a pneumatic accelerator/dryer pump which will <br />provide sufficient air volume to carry approximately 150 tons of coal per hour through the <br />pipeline system. As the coal and transport air-stream move through the pipeline, some surface <br />moisture will be lost through both mechanical action and air drying. Coal will be drawn from <br />the clean coal stockpile through one of the existing draw points in the truck tunnel and will be <br />fed to the pneumatic pump by a vibratory feeder. The feeder, main pneumatic pump, back-up <br />pump and related control power and control systems will consist of modular components <br />mounted on a flatbed trailer as illustrated by Figure 19-2, Pneumatic Coal Drying System - <br />Trailer Detail. Elettrical power will be provided by a standard shielded cable connected to the <br />existing power source. The trailer can be located under any of the draw points within the <br />existing truck tunnel and can be moved if necessary for maintenance or, in the unlikely event <br />of extended breakdown, to allow direct truck loading operations [o proceed. <br />SYSTEM OPERATION AND MAINTENANCE <br />The system is not expected to operate continuously. Operation will be governed by both <br />anticipated coal demand and available storage capacity in the surge bin. <br />All system components will be periodically inspected for excessive wear and to confirm that <br />they are operating properly. Mechanical components such as motors and pumps will be <br />inspected and maintained on a regular preventative maintenance schedule to provide required <br />availabilities. Any significant coal spillage at either the feed or discharge points will be cleaned- <br />up, with spilled material being returned to the coal stockpile. <br />ACZ lnc. • P.O. Box 774018 'Steamboat Springs, Colorado 80477 • (3031879-6260 <br />