Ash Handling

Introduction to Ash Handling Describe how ash is produced in a coal-fired plant. Distinguish between fly ash and bottom ash. Identify hazards associated with ash handling. Bottom Ash Describe how bottom ash is removed from a boiler. Explain how a dewatering bin functions. Explain how ash ponds are used to store ash temporarily. Fly Ash Systems Describe how fly ash can be removed from flue gas and collected in a wet fly ash collection system. Explain how fly ash can be removed from flue gas and collected in a dry fly ash collection system. Describe the components of a typical ash silo. Drum Mixers Describe the operation of an air slide. Explain the operation of a typical drum mixer. Describe some maintenance tasks commonly performed on a drum mixer. Bowl Mixers Describe the general operation of a typical bowl mixer. Describe some maintenance tasks commonly performed on a drum mixer. Ash Disposal Describe how conditioned ash may be picked up and delivered to a permanent storage site. Explain the function of ponds at permanent storage sites. Describe how ash is removed from ash ponds. Describe one way that ash intended for commercial applications is loaded into trucks for transport.