Title:
固体脱硫剤利用湿式排煙脱硫装置と方法
Document Type and Number:
Japanese Patent JP3650836
Kind Code:
B2
Abstract:
A wet-type flue gas desulfurization method and plant making use of a solid desulfurizing agent in which exhaust gas exhausted from a combustion apparatus such as a boiler is brought into contact with absorbing liquid to absorb sulfur oxide from the exhaust gas into the absorbing liquid followed by neutralization of the absorbing liquid containing the sulfur oxide thus absorbed. The solid desulfurizing agent is selectively retained in an absorbing liquid neutralizing zone and the absorbing liquid, containing water as a main constituent and solid products formed from the absorbed sulfur oxide, is selectively removed from the neutralizing zone. In the neutralizing zone the upward flow of the absorbing liquid, optionally augmented by an upward flow of air or water, forms a fluidized bed of limestone particles, thereby preventing coating of the limestone by gypsum and thereby retaining reactivity of limestone. According to the present invention, coexistence of Al and F in the absorbing liquid seldom deteriorates the desulfurizing performance. Further, it is possible to reduce power and cost required to grind limestone and to achieve a higher desulfurizing performance.
Inventors:
Hirofumi Yoshikawa
Nakajima Fumito
Hiroyuki Kaku
Narihi Takamoto
Hiroshi Ishizaka
Shigeru Nozawa
Nishimura Masakatsu
Takanori Nakamoto
Nakajima Fumito
Hiroyuki Kaku
Narihi Takamoto
Hiroshi Ishizaka
Shigeru Nozawa
Nishimura Masakatsu
Takanori Nakamoto
Application Number:
JP52753695A
Publication Date:
May 25, 2005
Filing Date:
May 11, 1995
Export Citation:
Assignee:
Babcock Hitachi Ltd.
International Classes:
B01D53/50; C01F11/06; B01D53/34; (IPC1-7): B01D53/50; B01D53/34; B01D53/77
Domestic Patent References:
| JP5033828U | ||||
| JP63072323A | ||||
| JP6285326A | ||||
| JP57038932A | ||||
| JP53078978A | ||||
| JP52097397A | ||||
| JP3056120A | ||||
| JP63137735A |
Attorney, Agent or Firm:
Takayoshi Matsunaga