Title:
アンモニウム塩含有廃水の処理装置及び方法
Document Type and Number:
Japanese Patent JP7305836
Kind Code:
B2
Abstract:
In a method for treating waste water containing ammonium salts, sodium sulfate crystal is obtained by freezing crystallization, then the pH value of the waste water is adjusted to a specific range, and next sodium chloride crystal and ammonia water is obtained by evaporation. Alternatively, the pH value of the waste water is adjusted to a specific range, then sodium chloride crystal and ammonia water is obtained by evaporation, and next sodium sulfate crystal is obtained by freezing crystallization. This method can recover ammonia, sodium sulfate, and sodium chloride from the waste water.
Inventors:
Kihei Yin
Lee
Kanshoen
Liu Zhiken
Royal power
Taka Jin Ai
Chen Yu Hua
Zhouiwa
Yang Ling
Shiwai
Ryo Iku
Peace of mind
Liu
Zhang Zhimin
Xu Shu
Guo Beni
Lee
Kanshoen
Liu Zhiken
Royal power
Taka Jin Ai
Chen Yu Hua
Zhouiwa
Yang Ling
Shiwai
Ryo Iku
Peace of mind
Liu
Zhang Zhimin
Xu Shu
Guo Beni
Application Number:
JP2022056042A
Publication Date:
July 10, 2023
Filing Date:
March 30, 2022
Export Citation:
Assignee:
China Petrochemical Co. Ltd.
China Petrochemical Chemical Co., Ltd.
China Petrochemical Chemical Co., Ltd.
International Classes:
C02F1/04; B01D21/00; C02F1/20; C02F1/22; C02F1/58; C02F9/00
Domestic Patent References:
| JP2005262004A | ||||
| JP2013094780A | ||||
| JP2009095821A | ||||
| JP2008223115A |
Foreign References:
| CN104609633A | ||||
| CN105000733A | ||||
| CN106746135A | ||||
| CN106698561A | ||||
| CN101935128A | ||||
| CN105110542A | ||||
| CN1944256A |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK