The wet type flue gas desulfurization process which uses the limestone

摘要

(57) Abstract Wet type flue gas desulfurization (WFGD) limestone dissolved speed of the limestone content slurry which is used for the system is made to increase with the addition of the ammonium ion. The ammonium ion can vapor ammonia or liquid ammonia and/or the water soluble ammonium salt (the ammonium sulfate, ammonium chloride or ammonium carbonate etc) by introducing in limestone content slurry. In increase of limestone dissolved speed of the limestone content slurry which is used for the WFGD system connection, decrease of the stoichiometry of the limestone which you use and use of bulkier limestone grain and/or decrease of slurry recycling factor becomes possible, capital cost and operating cost are reduced. You recover the ammonium ion at the time of particular processing and can reuse.