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AssigneeMitsubishi Heavy Industries, Ltd.
InventorsShigeo Hasegawa, Naohiko Ukawa, Susumu Okino, Koichiro Iwashita, Kazuaki Kimura, Atsushi Yoshioka, Yoshimitsu Kawanishi, Shoichi Onishi, Toru Takashina, Toyoshi Nakagawa
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This invention relates to a flue gas treating process including a heat recovery step for recovering heat from flue gas by means of a heat exchanger (4) and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid (D) in absorption towers (12, 13) so as to remove at least SO2 present in the flue gas by absorption into the absorbing fluid (D), which is characterized, for example, in that a powder addition step for spraying a powder collectable in the absorption step into the flue gas is provided prior to the heat recovery step. This invention makes it possible to provide a flue gas treating process in which a countermeasure against SO3 present in flue gas can be easily achieved without resorting to ammonia injection and the flue gas can further be purified without the disadvantage of causing the injected substance to remain in the treated flue gas.
A flue gas treating process for the treatment of flue gas containing at least SO2 and SO3 which includes a heat recovery step for recovering heat from the flue gas by means of a heat exchanger and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid in an absorption tower so as to remove at least SO2 present in the flue gas by absorption into the absorbing fluid, wherein
A flue gas treating process for the treatment of flue gas containing at least SO2 and SO3 which includes a heat recovery step for recovering heat from the flue gas by means of a heat exchanger and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid in an absorption tower so as to remove at least SO2 present in the flue gas by absorption into the absorbing fluid, wherein
Dependencies are inferred from the claim text.