石膏回収システム及び石膏回収方法

Japanese Patent JP6879801

B2

PROBLEM TO BE SOLVED: To provide a plaster recovery system and a plaster recovery method capable of efficiently separating impurities from plaster without affecting the operating conditions of the desulfurization apparatus and to obtain high purity plaster.SOLUTION: The plaster recovery method according to the present invention comprises a plaster slurry discharging step of discharging plaster containing at least water and mercury as a plaster slurry outside a system of a desulfurization apparatus for desulfurizing exhaust gas with an absorption liquid, and a mercury removal step of eluting and separating mercury from the plaster in the plaster slurry at the outside of the system of the desulfurization apparatus, in which in the mercury removal step, it is adjusted by ORP raising-pH lowering means so that the oxidation reduction potential of the plaster slurry is higher than that immediately after the plaster slurry discharging step and/or the pH value of the plaster slurry is lower than that immediately after the plaster slurry discharging step.SELECTED DRAWING: Figure 1

Hirayama Koichiro
Ryota
Directly to Kamiyama
Hirofumi Yoshikawa
Cormorant fishing exhibition
Satoshi Ushiku
Shoko Nagae

JP2017071249A

June 02, 2021

March 31, 2017

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Mitsubishi Power, Ltd.

C02F11/00; B01D53/50; B01D53/64; B01D53/96; B03B5/34; B03B9/00

JP2007185558A
JP2013006143A
JP2014237073A
JP2015128754A
JP2013081876A
JP2001831A
JP2004313833A
JP929267A
JP60129125A

Noriharu Fujita
Miori Takao
Kawakami Miki
Daisuke Nagata
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Hidefumi Kawamura
Ayako Nakamura
Satoshi Morimoto
Yu Tanaka
Tokumoto Koichi

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