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April 1992 MR-19 Pneumatic Coal Drying Installation • Pape ~ 4 <br />• INSTALL CYCLONE DRYER <br />Current plans call for installation of the pneumatic ryclone dryer within a protettive enclosure <br />at the top of the rurge bin. The ryclone will receive coal from the pneumatic transfer pipeline, <br />separate surface moisture from the coal by the combined effetts of centrifugal force and air <br />drying, and discharge the dried coal to [he surge bin. The ryclone and associated blower unit <br />will connett to the existing elettrial power source at the truck sale. <br />The cyclone has been designed and tested to remove all coal particles grater than 1 micron from <br />the feed-stream. Moisture removed from the coal will discharge from the ryclone u 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 [his material will be discharged along <br />with water vapor, discharge should not result in any signifiant fugitive dust emissions and no <br />modifiation of EFCPs existing air quali[y permits should be required. <br />ERECT PNEUMATIC PIPELINE, WALKWAY AND SUPPORT STRUCTURES <br />Coal will be transported co the ryclone dryer and hopper through an 8-inch pneumatic pipeline <br />approximately 210 feet long. The pipeline will be arried by an integrated <br />truss/walkway/pipeline strutturewhich will be pre-fabriated in four sections. The truss sections <br />will be ruppotted by three 24 inch, concrete filled steel columns. The integrated <br />truss/walkway/pipeline structure will attach to and be supported at either end by the hopper <br />structure and the eais[ing truck tunnel. <br />• INSTALL MODULAR FEEDER AND PUMP SYSTEMS <br />The heart of the coal transport rystem will be a pneumatic accelerator/dryer pump which will <br />provide sufficient air volume to arty approximately 150 [ons of coal per hour through [he <br />pipeline system. As the coal and transport air-stream move [hrough [he pipeline, some surface <br />moisture will be lost through bo[h mechanial attion 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 mntrol power and control rystems will wnsist of modulaz components <br />mounted on a flatbed trailer u illustrated by Figure 19-2, Pneumatic Coal Drying System - <br />Trailer Detail. Elettrial power will be provided by a standard shielded able connected to the <br />existing power source. The [oiler an be loafed under any of the draw points within the <br />existing truck tunnel and an be moved if necessary for maintenance or, in the unlikely event <br />of extended breakdown, to allow direct truck loading operations to 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 apacity in the surge bin. <br />All system components will be periodially inspected for excessive weaz and to corm that <br />they are operating properly. Mechanial wmponents such u motors and pumps will be <br />• inspected and maintained on a regular preventative maintenance schedule to provide required <br />availabilities. Any signifiant coal spillage at either the feed or discharge points will be deaned- <br />up, with spilled material being returned to the coal stockpile. <br />ACZ Inc. • P.O. Box 774018 • Steamboat Springs, Colorado 80477 • 13031879-6260 <br />