FOERFARANDE FOER AOTERVINNING AV VAERME OCH KEMIKALIER FRAON RESTLUT

摘要

IMPROVEMENTS IN THE RECOVERY OF HEAT AND CHEMICAL VALUES FROM SPENT PULPING LIQUORS Introduction of a carbonaceous fuel such as coal or petroleum into the combustion stage of a multiple solids fluidized bed reactor system for pulping liquor combustion and chemical regeneration provides an alternative source of unburned carbonaceous solids which may be transferred along with pulping liquor solid combustion residues to a reduction stage providing a carbon source for the reduction of sulfate to sulfide.