PROCESS AND DESIGN OF A CFB BLACK LIQUOR GASIFICATION SYSTEM OPERATING AT LOW PRESSURES

摘要

A black liquor gasification system (10) intended for use as a replacement for a Tomlinson cycle, Chemical Recovery Unit, and which operates at a temperature below the ash melting temperature thereby removing the potential for smelt-water reactions and explosions. The subject black liquor gasification system (10) is based on the use of a circulating fluidized bed (26) operating at atmospheric pressure that produces dry, recoverable salts as well as low calorific gases to be used within the paper-making process.