Title:
アンモニア回収装置及び回収方法
Document Type and Number:
Japanese Patent JP5501730
Kind Code:
B2
Abstract:
A method includes a first step of introducing an ammonia-containing wastewater to a CO 2 ·H 2 S stripper maintained to have a pressure higher than atmospheric pressure, and discharging CO 2 and H 2 S in a form of gas having a low moisture concentration from a tower top of the CO 2 ·H 2 S stripper while discharging an ammonia-containing solution from a tower bottom of the CO 2 ·H 2 S stripper; a second step of introducing the ammonia-containing solution obtained after the first step into an ammonia stripper which is maintained to have a lower pressure than that of the CO 2 ·H 2 S stripper, and thereby discharging a gas rich in ammonia containing a small amount of H 2 S and CO 2 from a tower top of the ammonia stripper while discharging water usable as industrial water from a tower bottom of the ammonia stripper; and a third step of introducing the ammonia rich gas obtained after the second step into a washing tower which is maintained to have a lower pressure than that of the ammonia stripper, and wherein the third step includes a washing step with a Na-containing base reagent thereby discharging a wastewater containing a Na compound from a tower bottom of the washing tower while discharging a substantially H 2 S-free purified gas rich in ammonia from a tower top of the washing tower.
More Like This:
Inventors:
Fumiaki Sato
Hiroyuki Furuichi
Yudai Kato
Kazuo Ishida
Hiroyuki Furuichi
Yudai Kato
Kazuo Ishida
Application Number:
JP2009243169A
Publication Date:
May 28, 2014
Filing Date:
October 22, 2009
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
C02F1/20; B01D19/00; B01D53/14; C01C1/02
Domestic Patent References:
| JP58187489A | ||||
| JP55158119A | ||||
| JP57180693A | ||||
| JP6115928A | ||||
| JP56104994A | ||||
| JP50130802A | ||||
| JP2004535481A |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Takashi Matsuzaki
Hirose Miki
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Naomi Yoshida
Ayako Nakamura
Fukagawa Eri
Satoshi Morimoto
Kyoko Tsunoda
Takashi Matsuzaki
Hirose Miki