| 摘要 |
<p>A method and apparatus for processing a waste stream from digestion of lignocellulosic material to form useful products. The waste stream (1) can comprise black liquor, red liquor, alkaline, acidic or neutral sulfite spent liquor, or polysulfide spent liquor. Partial oxidation (100) is performed on the waste stream to form hot gases and molten salts. These are cooled using a quench liquor (102) to form quenched gas and carbonate liquor from which particles are removed to form a raw fuel gas. H2S is removed from the raw fuel gas using an H2S removal process (105) which is more selective for H2S than it is for CO2, following the particle removing step (104), thereby forming usable fuel gas (5) as one useful product, and acid gases (6). Further processing is performed on the acid gases to produce additional useful products.</p> |
