Chemically Active Fluid Bed for SOx Control: Volume III. Sorbent Disposal

摘要

The report describes a laboratory investigation of three areas of the chemically active fluidized-bed (CAFB) process: residue characterization, leaching property, and thermal activity. Results indicate that further processing is required to meet environmental constraints. The environmental impact of CAFB residue disposal is also compared with results of conventional residues (flue gas desulfurization and lignite ash) from parallel tests. The impact of the recently enacted Resource Conservation and Recovery Act is assessed. The CAFB process was developed to convert high-sulfur heavy oils and low-grade coal to clean, medium heating value fuel gas in conventional boilers. Disposal of the spent sorbent, which consists of varying amounts of CaO, CaS, and CaSO4, may cause environmental concerns associated with potential air, water, odor, and heat pollution.