发明名称 TREATMENT OF WASTE GAS CONTAINING FLUORINE-CONTAINING COMPONENT
摘要 <p>PURPOSE:To regenerate an aq. CaCl2 soln. and recycle the same as treating liquid for removal of fluorine-contg. component, by treating waste gas contg. fluorine-contg. component with the CaCl2 soln. to remove fluorine as CaF2 in an absorption column, and adding gypsum dehydrate to the treated liquid contg. Cl ions. CONSTITUTION:Waste gas 2 contg. F-contg. compoent is introduced into an absorption column 1, and an aq. CaCl2 soln. of 4-5.5pH is sprayed from the upper part to deposit F-contg. component in the gas as CaF2. The liquid is supplied into a tank 5 where gypsum dihydrate 6 industrial water 7 are added thereto. CaCl2 is regenerated by the reaction in the tank 5, and CaCl2 is again supplied to the upper part of the column 1 by a pump 8 and is cyclically used as the treating liquid for removal of fluorine-contg. compound from the waste gas contg. F. The residue in the tank 15 is treated with a thickener 9, whereafter CaF2 11 is separated and recovered with a solid-liquid separator 10. The supernatant liquid is returned to the tank 5.</p>
申请公布号 JPS5969130(A) 申请公布日期 1984.04.19
申请号 JP19820180022 申请日期 1982.10.15
申请人 NIPPON KOKAN KK 发明人 YAMASHITA KOU;KATOU TATSUO
分类号 B01D53/68;B01D53/34;B01D53/77 主分类号 B01D53/68
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