Title:
【発明の名称】湿式排煙脱硫装置の排水処理方法
Document Type and Number:
Japanese Patent JP3063123
Kind Code:
B2
Abstract:
PURPOSE:To recover the halogen compound and COD causing substance in waste water as an insoluble solidified substance by adding an alkali metal or alkaline earth metal-containing compound and coal ash to waste water wherein chlorine is conc. after electrodialysis and drying the waste water. CONSTITUTION:In a waste water treatment process, waste water is separated into a desalted solution and a chlorine conc. solution at first in an electrodialyzer 13 and the desalted solution is sent to an absorbing tower 5 through a line 14 to be reutilized while the chlorine conc. solution is sent to a mixing apparatus 16 through a line 15. Coal ash from a line 17, lime from a line 18 and gypsum from a line 19 are added to and mixed with the chorine conc. solution in the mixing apparatus 16 and the resulting mixture is sent to a drying apparatus 20 and a part of the exhaust gas from a boiler 1 is introduced into the drying apparatus 20 through the line 21 branched from the exhaust gas line 2 on the downstream side of an electric precipitator 3 to be brought into contact with the aforementioned mixture and reacted therewith to dry the same to obtain a disposable solid 23. The used exhaust gas is again returned to the exhaust gas line 2 through a line 22.
Inventors:
Atsushi Katagawa
Shigeru Nozawa
Takanori Nakamoto
Masakatsu Nishimura
Shigeru Nozawa
Takanori Nakamoto
Masakatsu Nishimura
Application Number:
JP19848790A
Publication Date:
July 12, 2000
Filing Date:
July 26, 1990
Export Citation:
Assignee:
Babkotsu Hitachi Co., Ltd.
International Classes:
B01D53/50; B01D53/34; B01D53/77; C02F1/04; C02F1/469; C02F9/00; (IPC1-7): C02F1/469; B01D53/50; B01D53/77; C02F1/04
Domestic Patent References:
| JP58210891A | ||||
| JP62244427A |
Attorney, Agent or Firm:
Takayoshi Matsunaga (1 outside)