Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1978-10-02
1980-12-16
Kratz, Peter F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
159 47WL, 162 47, 162 51, 210758, 423206R, 423DIG3, D21C 1110, D21C 1114
Patent
active
042395895
ABSTRACT:
High recovery of useful energy from the heat of reaction in the oxidation of black liquor is obtained by integrating the oxidation into the multiple effect evaporation system of the pulp mill recovery sequence. The heat of reaction is thereby recovered as flash steam, which when combined with the vapors from an appropriate evaporator body enables recovery of its energy through further evaporation. The oxidation reaction may be carried out on the liquor leaving the second effect of the evaporation sequence for maximum energy recovery, or in accordance with an alternative embodiment, the reaction is carried out between the first effect and the flash tank with preferable addition of a second flash tank in series with the first.
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Christie, "Sulfide Increase Following Weak Black Liquor Oxidation . . . ", P & P Mag. Cam., 73, No. 10, Oct. 1972.
Elton Edward F.
Patrylak Andrew J.
Santangelo Joseph G.
Air Products and Chemicals Inc.
Innis E. Eugene
Kratz Peter F.
Simmons James C.
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