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Title:
INORGANIC ACID RECOVERY METHOD AND APPARATUS
Document Type and Number:
Japanese Patent JP2012020208
Kind Code:
A
Abstract:

To provide an inorganic acid recovery apparatus, capable of enhancing the acid recovery rate with a compact structure.

The inorganic acid recovery apparatus includes: a first electrodialyzer 20 which separates an acid solution and an alkali solution from a neutralized solution of an inorganic waste liquid by electrodialysis; a second electrodialyzer 30 which separates the acid solution into a concentrated acid liquid and a diluted acid solution by electrodialysis; and a vaporization concentrating device 40 which vaporizes and concentrates the concentrated acid solution to generate a recovery acid solution while discharging an acid-containing effluent. At least part of the acid-containing effluent discharged from the concentrating device 40 is mixed to the acid solution to be supplied to the second electrodialyzer 30.


Inventors:
MORIHIRO HIROYUKI
ABE TAKESHI
HIRANO SATORU
YUASA MASUO
Application Number:
JP2010157701A
Publication Date:
February 02, 2012
Filing Date:
July 12, 2010
Export Citation:
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Assignee:
ASTOM:KK
SASAKURA ENG CO LTD
International Classes:
B01D61/58; B01D61/44; B01D61/46; C02F1/04; C02F1/469; C23G1/36
Domestic Patent References:
JP2003159593A2003-06-03
JPH01135507A1989-05-29
JPS4888095A1973-11-19
JP2003159593A2003-06-03
JPH01135507A1989-05-29
Attorney, Agent or Firm:
Shinichi Mashita



 
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