To concentrate-separate selectively carbon dioxide and hydrogen from a blast furnace gas by practicing an operation by the PSA method.
A process of separating a blast furnace gas repeats a cycle including an adsorption process of introducing the blast furnace gas from the blast furnace gas containing carbon dioxide, nitrogen, hydrogen, and carbon monoxide into an adsorption tower to allow an adsorbent to adsorb carbon dioxide in the blast furnace gas and to lead out non-sorbed gas from the adsorption tower in a state that the tower inside is at high pressures, and a desorption process of desorbing carbon dioxide from the adsorbent to lead out a desorption gas outside the tower in a state that the tower inside is at low pressures by a pressure-variation-adsorption-type gas separation method of involving using the adsorption towers A, B, and C filled with the adsorbent having a high adsorption ability of carbon dioxide and a low adsorption ability of hydrogen, wherein non-sorbed gas from the adsorption tower is taken out through a hydrogen recovery piping 3 till a halfway from the starting time of the absorption process, and thereafter taken out trough an outlet pipeing 4 different from the hydrogen recovery piping 3.
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原岡 たかし
中川 二彦
茂木 康弘
坂井 至
ＪＦＥスチール株式会社
Tatsuya Tanaka