Lime enhances moving bed filters for mercury and dioxin control
- Dravo Lime Co., Yonkers, NY (United States)
- Dravo Lime Co., Pittsburgh, PA (United States)
- Maerker Umwelttechnik GmbH, Harburg (Germany)
Moving bed carbon filters were developed and used in Europe to control mercury and dioxin emissions from municipal waste combustors (MWCs), crematories, hazardous waste incinerators and power plants. Although some operating problems such as a potential for fires to form in the carbon beds have caused operators some concern, more stable bed materials are presently being produced which can maintain the moving bed filter`s capability in reducing mercury and dioxin emissions to very low levels while providing safe operations. Maerker Umwelttechnik GmbH (Maerker) and Dravo Lime Company (Dravo) have developed a pelletized form of Sorbalit{reg_sign} that replaces the carbon in moving bed filters and is effective in removing mercury, dioxins, and acid gases without the inherent problems of using a carbon only adsorbent system. Sorbalit pellets are a formulation of portland cement, lime, carbon, and sulfur compounds. These pellets are currently being successfully applied in a hazardous waste incinerator, a foundry, a crematory, and a contaminated soil treatment plant. This paper discusses the development of pellet technology and its application in moving bed filters. Safety aspects for the use of composite carbon/lime pellets will be discussed and a review of removal efficiencies among carbon alone, a composite carbon/lime material in a powder form, and composite carbon/lime adsorbents in a pellet form will be provided.
- Research Organization:
- Solid Waste Association of North America, Silver Spring, MD (United States); Air and Waste Management Association, Pittsburgh, PA (United States); Integrated Waste Services Association, Washington, DC (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States); American Society of Mechanical Engineers, Yonkers, NY (United States). Solid Waste Processing Div.; Environmental Protection Agency, Research Triangle Park, NC (United States). Air Pollution Technology Branch
- OSTI ID:
- 548949
- Report Number(s):
- CONF-970440-; ON: DE97007054; TRN: 97:005590-0037
- Resource Relation:
- Conference: 5. annual North American waste-to-energy conference and exhibition, Research Triangle Park, NC (United States), 22-25 Apr 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of fifth annual North American waste-to-energy conference; PB: 1102 p.
- Country of Publication:
- United States
- Language:
- English
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