| 摘要 |
<p>Process for recovering chemicals and energy from spent liquor obtained when producing paper pulp by chemical delignification of fibrous raw material. The spent liquor is gasified in at least two reactors, a first and a second stream of solid and/or smelt material and of combustible gaseous material being formed. The formed material is treated thereafter in one or more devices (5, 6, 7, 8), whereby a first (9) and a second liquor (27) is formed. The pressure and/or temperature in the said first reactor differ(s) from the pressure and/or temperature in the said second reactor. In addition, one or more process chemicals are recovered selectively from the formed liquor and/or gas, and are thereafter returned in whole or in part to one or more of the said reactors (1, 2) and/or to one or more of the said devices (5, 6, 7, 8) for treatment of the formed material.</p> |
