Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Assessment of black liquor recovery boilers

Technical Report ·
DOI:https://doi.org/10.2172/6722162· OSTI ID:6722162
In the paper making industry, pulpwood chips are digested and cooked to provide the pulp going to the refining and paper mills. Black liquor residue, containing the dissolved lignin binder from the chips, with a concentration of 12 to 16% solids, is further concentrated to 62 to 65% solids and mixed with salt cake, Sodium Sulfate (Na/sub 2/SO/sub 4/). The resulting concentrate of black liquor serves both as a fuel for generating steam in the boiler and also as the mother liquid from which other process liquors are recovered and recycled. Because the black liquor fuel contains high alkali concentrations, 18.3% sodium, 3.6% sulfur, an amount typical of midwestern bituminous coal, and measurable amounts of silica, iron oxides and other species, the black liquor boiler experience was reviewed for application to MHD boiler technology.
Research Organization:
Gilbert/Commonwealth, Reading, PA (USA)
DOE Contract Number:
AC01-77ET11058
OSTI ID:
6722162
Report Number(s):
DOE/ET/11058-T3
Country of Publication:
United States
Language:
English