METHOD AND EQUIPMENT FOR TREATMENT OF BLACK LIQUOR AT PULP MILL
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United States of America Patent
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Issued Date -
Sep 13, 2012
app pub date -
Nov 2, 2010
filing date -
Nov 6, 2009
priority date (Note) -
Abandoned
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Abstract
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.
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