METHOD AND EQUIPMENT FOR TREATMENT OF BLACK LIQUOR AT PULP MILL

摘要

The invention relates to a method and equipment for treating pulp mill black liquor so as to recover the energy in chemicals therein. In the invention the black liquor is pyrolysed in a pyrolysis reactor (4), where causticizing material consisting of metal oxide and sodium oxide and heated in a burning unit (6) is conveyed, and gaseous components formed in pyrolysis are conveyed for utilization and solids are returned to the burning unit.