Title:
HIGH PERFORMANCE STACK GAS DESULFURIZING METHOD
Document Type and Number:
Japanese Patent JP3197082
Kind Code:
B2
Abstract:
PURPOSE: To economically decrease SOx concentration of waste combustion gas to low concentration that cannot be attained up to now by combining a 1st desurfurizing process using Ca compounds as an adsorbent in series and a 2nd desurfurizing process using alkali metal (including ammonia) as an adsorbent.
CONSTITUTION: Waste combustion gas 1 is introduced into the 1st desurfurizing process 2 having a trap 6 for an adsorbent where fine bubbles of air are generated to remove the greater part of SOx in the waste gas by absorbing solution using Ca compounds as an absorbent. Next, the waste gas 1 is introduced into the 2nd desurfurizing process 14 having a trap 18 where fine bubbles of air are generated and being a spray tower with a wet electric precipitating plate 17 to remove the residue of SOx in the waste gas by absorbing solution using alkaline compounds (including ammonia) as an absorbent. The absorbing solution that has absorbed SOx drawn out from the 2nd desurfurizing process 14 is transferred to the 1st desurfurizing process 2 to make the absorbing solution of the 1st absorption process include the Ca compounds and the alkali metal compounds. Consequently the waste gas is desulfurized to a SOx concentration of about ≤1ppm.
Inventors:
Atsushi Taya
Naohiko Ugawa
Susumu Okino
Tohru Takashina
Koichiro Iwashita
Naohiko Ugawa
Susumu Okino
Tohru Takashina
Koichiro Iwashita
Application Number:
JP32045192A
Publication Date:
August 13, 2001
Filing Date:
November 30, 1992
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
Kansai Electric Power Co., Inc.
Kansai Electric Power Co., Inc.
International Classes:
B01D53/50; B01D53/34; B01D53/77; (IPC1-7): B01D53/50; B01D53/34; B01D53/77
Domestic Patent References:
| JP6397216A | ||||
| JP194919A | ||||
| JP607925A | ||||
| JP62140953U | ||||
| JP5017318B1 |
Attorney, Agent or Firm:
Akira Uchida (2 outside)