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|1. (WO2018181295) RECTIFICATION DEVICE|
|Applicants:||SUMITOMO SEIKA CHEMICALS CO., LTD.
A rectification device that purifies crude gas, the rectification device comprising: a rectification unit into which the crude gas is introduced and in which a rectification process is performed on the crude gas; and a processing container having in the interior thereof a bottom space disposed below the rectification unit, and a top space disposed above the rectification unit. A fill material that aids gas-liquid contact is disposed in the rectification unit, and a calandria reboiler, which heats and gasifies liquefied gas while naturally circulating the liquefied gas inside the bottom space, is disposed inside the bottom space.