Title:
REMOVING METHOD OF FLUORINE IN DRAINAGE AND THE SYSTEM
Document Type and Number:
Japanese Patent JP2003126866
Kind Code:
A
Abstract:
To remove fluorine in drainage by depressing a used amount of Al chemical and reducing sludge produced after the treating.
A removing system of fluorine in the drainage is provided with an aluminum reactor 2 for adding an aluminum compound to the drainage containing fluorine component, a dehydrator 5 for dehydrating sediment containing fluorine component and aluminum hydroxide produced by adding the aluminum compound to the drainage, a dissolver 8 for dissolving the dehydrated sediment with acid or alkali, a calcium reactor 9 for adding a calcium compound to the solution containing the dissolved sediment, and a solid-liquid separating vessel 11 for solid-liquid separation of calcium fluoride.
Inventors:
NAGAYASU HIROTSUGU
YOSHIMI KATSUJI
TAMAI MASATOSHI
MATSUO TAKESHI
NAKAYASU IWAO
YOSHIMI KATSUJI
TAMAI MASATOSHI
MATSUO TAKESHI
NAKAYASU IWAO
Application Number:
JP2001330416A
Publication Date:
May 07, 2003
Filing Date:
October 29, 2001
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B01D61/24; B01D61/44; C02F1/04; C02F1/44; C02F1/469; C02F1/52; C02F1/58; (IPC1-7): C02F1/58; B01D61/24; B01D61/44; C02F1/04; C02F1/44; C02F1/469; C02F1/52
Attorney, Agent or Firm:
Okuyama Shoichi (2 outside)