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Control of Sulfur Dioxide Emissions from Pulverized Coal-Fired Boilers by Dry Removal with Lime and Limestone Sorbants
Abstract
Over the past decade increasing concern over the potential environmental impact associated with the emissions of both gaseous and particulate pollutants has resulted in the promulgation of strict regulatory standards governing such emissions. In this regard, particular attention has been placed upon the control of sulfur dioxide (SO2) from major fuel burning installations. The provisions of the 1977 Amendments to the Clean Air Act which relate to the Prevention of Significant Deterioration (PSD) and the New Source Performance Standards (NSPS) have made consideration of this problem of significant additional importance in the context of increased coal utilization.
There exist three general methods for the control of sulfur dioxide emissions from pulverized coal-fired boiler equipment. These are: (1) coal cleaning to remove pyritic sulfur, (2) conventional wet, nonregenerable scrubbing with alkaline slurry and solution processes, and (3) dry processes which involve direct introduction of lime or limestone into the firebox, or a spray dryer operated with nonregenerable alkaline sorbents coupled with a fabric filter collector. Equipment requirements, SO2 removal criteria, general economics, and potential applications of these latter two approaches within category (3) will be discussed.
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Citation
Schwartz, M. H. (1979). Control of Sulfur Dioxide Emissions from Pulverized Coal-Fired Boilers by Dry Removal with Lime and Limestone Sorbants. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /93884.