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    • 5. 发明授权
    • Desulfurization and decarbonation process
    • 脱硫脱碳工艺
    • US5895634A
    • 1999-04-20
    • US859113
    • 1997-05-20
    • Shigeaki MitsuokaHiroshi TanakaMasaki Iijima
    • Shigeaki MitsuokaHiroshi TanakaMasaki Iijima
    • B01D53/34B01D53/50B01D53/62B01D53/75B01D53/77
    • B01D53/75B01D53/507B01D53/62Y02C10/04
    • This invention provides a process for effecting desulfurization and decarbonation in two stages. A gas containing sulfur oxides and carbon dioxide is first treated in a desulfurization step so as to cause sulfur oxides to be absorbed in the form of calcium-sulfur oxide compounds; the gas is then treated in a decarbonation step so as to cause carbon dioxide and any sulfur oxides escaping from the desulfurization step to be absorbed in the form of amine salts; the absorbing solution containing the amine salts is regenerated by liberating carbon dioxide therefrom; a part of the regenerated absorbing solution is recycled to the decarbonation step while the remainder of the absorbing solution is fed to a secondary regeneration step where it is treated with a basic calcium substance to regenerate basic amine compound for recycle and to form a solid containing calcium-sulfur oxide compounds and calcium carbonate.
    • 本发明提供两阶段脱硫脱碳的方法。 首先在脱硫步骤中处理含有硫氧化物和二氧化碳的气体,以使硫氧化物以钙 - 硫氧化物的形式被吸收; 然后在脱碳步骤中处理气体,以使二氧化碳和从脱硫步骤逸出的任何硫氧化物以胺盐的形式被吸收; 通过从其中释放二氧化碳来再生包含胺盐的吸收溶液; 将再生吸收溶液的一部分再循环至脱碳步骤,同时将剩余的吸收溶液进料到二次再生步骤,在其中用碱性钙物质处理以再生用于再循环的碱性胺化合物并形成含钙的固体 硫氧化物和碳酸钙。