| 摘要 |
<p>PURPOSE:To recover alpha-type gypsum semi-hydrate efficiently, by adsorbing and removing sulfur compounds in a high temperature reductive gas, reproducing the absorbent with an O2-contg. gas, and reacting the resulting SO2-contg. reproduced gas with a slurry contg. Ca compound in a reaction container. CONSTITUTION:A high temperature reductive gas 1 contg. sulfur compounds such as H2S, COS, etc., is introduced into a reaction chamber 6 and the sulfur compounds are adsorbed by an adsorbent 5 such as iron oxide, etc., and removed, resulting a purified gas 4 production. Meantime, an O2-contg. gas is introduced into each reaction chamber 8, 9 to reproduce the adsorbent 5, and the resulting reproduced gases contg. SO2 12, 14 are mixed each other to give a gas mixture 16 which is fed to a reaction chamber 26 through a heat- exchanger 17 and here reacted with a slurry of CaCO3, Ca(OH)2 at 120-160 deg.C to obtain alpha-type gypsum semi-hydrate and it is recovered by a solid-liquid separator 30.</p> |
