Method for producing high concentration effective gas using multi membrane from by-product gas generated from steelworks and device for the same

摘要

The present invention relates to a method and apparatus for separating high concentration effective gas from steel production by-products using a multi-stage separator, and more particularly, to supply the steel production by-product gas containing effective gas and carbon dioxide (CO ₂ ) to the first intake module. step; Supplying the gas separated from the separator of the first intake module to the second intake module connected in series; Supplying an absorption liquid for selectively absorbing carbon dioxide in parallel to the first intake module and the second intake module, respectively; Recovering the gas separated from the separator of the second intake module; And degassing the carbon dioxide from the carbon dioxide-containing absorbent liquid obtained from the first intake module and the second intake module. And devices that can be used therein.