APPARATUS AND METHOD FOR DESULFURIZING COKE OVEN GAS

PROBLEM TO BE SOLVED: To provide a coke oven gas desulfurization apparatus which stably and efficiently desulfurizes a coke oven gas. SOLUTION: Part of a catalyst-containing aqueous alkali solution 201 collected in a water collection part 215 on the bottom of a main tower body 210 through which a co...

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Hauptverfasser: NAKAMURA MASAAKI, YAMAGUCHI HIDEO, FUKUMOTO KENJI, MIYATA TETSUAKI, SHIROMIZU WATARU, TANAKA SHIGEZO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a coke oven gas desulfurization apparatus which stably and efficiently desulfurizes a coke oven gas. SOLUTION: Part of a catalyst-containing aqueous alkali solution 201 collected in a water collection part 215 on the bottom of a main tower body 210 through which a coke oven gas is passed from its lower part to its upper part is separated, and cooled and recirculated by being cooled by means of a first cooler 300 and by being sprayed through a first nozzle 216 in the middle of the main tower body 210 to form a cooling region 250 at the lower part of the main tower body 210. The remainder of the collected aqueous alkali solution 201 is cooled and recirculated by cooling by means of a second cooler 400, by being treated in an oxidation treatment tower 500 where the catalyst is oxidized, and by being sprayed through a second nozzle 217 on the upper part of the main tower body 210 to form a desulfurization treatment region 260 at the upper part of the main tower body 210. The first cooler 300 recirculates and cools the aqueous alkaline solution to bring it to a state in which the coke oven gas passing the cooling region 250 cools the coke oven gas to a temperature necessary for the desulfurization treatment in the desulfurization treatment region 260. COPYRIGHT: (C)2007,JPO&INPIT