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Title:
セメントキルン燃焼ガス抽気ダストの処理方法及び処理装置
Document Type and Number:
Japanese Patent JP5652947
Kind Code:
B2
Abstract:

To enhance purity of recovered heavy metals and gypsum at low equipment and operation costs in recovering the heavy metals from dust in a bleed gas of a cement kiln combustion gas.

An apparatus 1 and the like for treating the dust in a bleed gas of a cement kiln combustion gas includes a bleeder 6 to cool and bleed part of the combustion gas from a kiln exhaust gas duct between the outlet port 5a of a cement kiln 5 and a lowermost cyclone; a wet dust collector 11 to perform wet collection of the dust D2 contained in the bleed gas G1 bled by the bleeder, removing sulfur oxides contained in the bleed gas, and to adjust the pH of a slurry S1 formed in the wet dust collection and desulfurization so that the heavy metals contained in the slurry dissolve in the liquid phase of the slurry; a first solid/liquid separator 21 to perform solid/liquid separation of the slurry of which the pH is adjusted by the wet dust collector; and a second solid/liquid separator 23 to separate and recover the heavy metals from a filtrate W1 separated by the first solid/liquid separator.

COPYRIGHT: (C)2011,JPO&INPIT


Inventors:
寺崎 淳一
Application Number:
JP2010285271A
Publication Date:
January 14, 2015
Filing Date:
December 22, 2010
Export Citation:
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Assignee:
太平洋セメント株式会社
International Classes:
C04B7/60; B01D47/06; B01D50/00; B01D53/50; B01D53/68; B01D53/77; C02F1/62; F27D17/00
Attorney, Agent or Firm:
Nakai 潤