Improved Energy Efficiency and Safety in Smelt Dissolving Through Smelt Solidification, 1993 Engineering Conference Proceedings
Solidification of kraft smelt prior to dissolving to make green liquor representa a modification of the conventional recovery process that can improve energy efficiency, while eliminating the potential for smelt-water explosions in the dissolving tank and reducing TRS emissions levels in the dissolving tank vent stack. Use of a steam fluidized bed concept may provide an economic means for achieving these benefits. Technical issues have been identified for this proposed process modification, and results of preliminary laboratory experiments are presented which address several of these issues, while showing additional process benefits in decreased dregs flows and enhanced dregs settling rates in the green liquor clarifier. Several unanswered process concerns still remain, including ultimate use of the superheated steam product and disposition of smelt sulfur.
Improved Energy Efficiency and Safety in Smelt Dissolving Through Smelt Solidification, 1993 Enginee