Title:
A water treatment process and a water disposal system
Document Type and Number:
Japanese Patent JP5968524
Kind Code:
B2
Abstract:
A water treatment method and a water treatment system that are capable of treating water containing salts to allow recovery of treated water at a high ion removal rate and a high water recovery rate, and allow recovery of high quality gypsum are provided. In the water treatment system, the water to be treated containing Ca2+ and SO42− is separated into concentrated water in which Ca2+ and SO42− are concentrated and treated water containing CO2 in a first demineralizer so that the treated water is recovered. The concentrated water in the first demineralizer is adjusted to a pH at which calcium carbonate can be dissolved and the scale inhibition function of a scale inhibitor is reduced, and then is delivered to a crystallizing tank. In the crystallizing tank, gypsum is crystallized from the concentrated water in the first demineralizer. The gypsum is separated and recovered in a separating section.
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Inventors:
Takashi Yoshiyama
Susumu Okino
Jun Sato
Sakurai Hideaki
Hideo Suzuki
Yutaka Nakakoji
Yoshioka Shigeru
Cormorant fishing exhibition
Masayuki Eda
Susumu Okino
Jun Sato
Sakurai Hideaki
Hideo Suzuki
Yutaka Nakakoji
Yoshioka Shigeru
Cormorant fishing exhibition
Masayuki Eda
Application Number:
JP2015513442A
Publication Date:
August 10, 2016
Filing Date:
April 25, 2013
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
C02F1/58; B01D61/04; C02F1/44; C02F1/60
Domestic Patent References:
| JP2001200788A | 2001-07-27 | |||
| JP2004016996A | 2004-01-22 | |||
| JPS5633024A | 1981-04-03 | |||
| JPH11123312A | 1999-05-11 | |||
| JPH10113660A | 1998-05-06 | |||
| JP2006305541A | 2006-11-09 | |||
| JP2000015257A | 2000-01-18 | |||
| JP2002011466A | 2002-01-15 | |||
| JPH1085742A | 1998-04-07 |
Attorney, Agent or Firm:
Noriharu Fujita
Kunio Ueda
Kunio Ueda