Title:
尿素、アンモニア及び二酸化炭素を含む水溶液の処理方法並びに処理設備
Document Type and Number:
Japanese Patent JP6949693
Kind Code:
B2
Abstract:
Disclosed are: a treatment method comprising (1) a step in which an aqueous solution containing urea, ammonia and carbon dioxide is introduced into a first stripper (PCS1) and subjected to stripping, and the aqueous solution after stripping is introduced into a urea hydrolyzer (UHY), (2) a step in which urea in the aqueous solution is hydrolyzed in the urea hydrolyzer (UHY), and the aqueous solution after hydrolysis is introduced into a second stripper (PCS2), (3) a step in which the aqueous solution is subjected to stripping in the second stripper (PCS2), and (4) a step in which a part of the aqueous solution before being stripped in the first stripper (PCS1), and/or, a part of the aqueous solution after being stripped in the first stripper (PCS1) but before being hydrolyzed in the urea hydrolyzer (UHY) is introduced into an exhaust gas treatment equipment equipped with an ammonia scrubbing equipment (ASCR); and a treatment equipment therefor.
Inventors:
Kei Sasaki
Application Number:
JP2017235912A
Publication Date:
October 13, 2021
Filing Date:
December 08, 2017
Export Citation:
Assignee:
Toyo Engineering Corporation
International Classes:
C01C1/02; C02F1/20; C01C1/08; C02F1/58; C07C273/04; C07C275/00
Domestic Patent References:
| JP57193439A | ||||
| JP2000279736A | ||||
| JP9227493A | ||||
| JP2000001466A | ||||
| JP50142515A | ||||
| JP2017209615A | ||||
| JP53052274A |
Foreign References:
| US20110091369 |
Attorney, Agent or Firm:
Ishibashi Masayuki
Fumiko Mihara
Fumiko Mihara