Chiyoda Corporation

Yoshiaki Komatsubara

Yoshio Ogawa

Hiroshi Tomita

Hiroshi Yanagioka

Kazushige Kawamura

Akira Kumagai

Toshiaki Urata

Naobumi Hashimoto

A method and apparatus for the treatment of a waste gas containing dust and chemical contaminants are disclosed. The apparatus includes a combination of a cooling/dust-eliminating chamber and a chemical treatment chamber in a single container. The first mentioned chamber is provided with sprayers for the cooling liquid, a perpendicular bulkhead or pipes, a collecting plate for the cooling liquid and gas-dispersing pipes in a special configuration, so that the dust-liquid separation can be efficiently effected without badly affecting the chemical treatment of the gas. Thus, the apparatus can be minimized in size as a whole and made economically attractive.

Method and apparatus for the treatment of a waste gas containing dists

Method and apparatus for the treatment of a waste gas containing dusts

A process for treating a flue gas containing sulfur dioxide and fly ash is disclosed in which an aqueous absorbent liquid is sprayed into the glue gas stream, and the resulting gas is fed to a vertical, open-ended pipe to form a jet annular stream, so that portions of the SO.sub.2 and the fly ash contained in the flue gas are transferred to the liquid phase. The jet annular stream is then sparged into the aqueous absorbent held in a well-mixed vessel to form a jet bubbling layer in a shallow, upper region of the aqueous absorbent, so that a greater part of the SO.sub.2 and the fly ash are removed from the gas. Air is introduced into a deep lower region of said aqueous absorbent to provide streams of fine oxygen-containing gas bubbles throughout the whole vessel, so that the absorbed SO.sub.2 and other sulfites are oxidized to form coarse gypsum crystals while COD of the absorbent is reduced.

Wet desulfurization process for treating a flue gas

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Tokyo, Japan

Yoshiaki Komatsubara