Method for removing sulfur oxides from combusting gases in wet, calcium-based flue gas desulfurization processes
First Claim
1. A method for reducing accumulation of solid sulfate-containing deposits in apparatus for storing, transporting or utilizing wet lime or limestone for combustion gas desulfurization, comprising the step of contacting said combustion gas in a reaction zone in the presence of said wet lime or limestone with thiosulfate and an organic polyacid chelating agent, said thiosulfate and chelating agent being present in sufficient concentrations to diminish the amount of sulfate formed as the result of oxidation of sulfite to sulfate.
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Abstract
A method is provided for improving the reliability, SO2 removal and thiosulfate utilization in a wet lime/limestone flue gas desulfurization process by contacting the combustion gases in the presence of the wet lime or limestone with thiosulfate and an organic polyacid chelating agent.
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Citations
8 Claims
- 1. A method for reducing accumulation of solid sulfate-containing deposits in apparatus for storing, transporting or utilizing wet lime or limestone for combustion gas desulfurization, comprising the step of contacting said combustion gas in a reaction zone in the presence of said wet lime or limestone with thiosulfate and an organic polyacid chelating agent, said thiosulfate and chelating agent being present in sufficient concentrations to diminish the amount of sulfate formed as the result of oxidation of sulfite to sulfate.
Specification