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methods for pulp removal from wood and recovery of pulping chemicals from black liquor, and for recovery of pulping chemicals from black liquor
methods for pulp removal from wood and recovery of pulping chemicals from black liquor, and for recovery of pulping chemicals from black liquor
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机译：木材中去除纸浆和黑液中制浆化学品的回收方法以及黑液中制浆化学品的回收方法
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1/1 overview “methods for removing pulp from wood and recovering chemical from pulp from black liquor, and for recovering chemicals Wood pulp forming from black liquorâ € ™ s in a digester, wood chips and white liquor are combined and cooked under pressure to form wood pulp. This produces black liquor that is concentrated and burned in a recovery boiler. The recovery boiler produces ashes containing sodium, sulfur, potassium and chloride. The ash is dissolved and subjected to a process that recovers sodium sulfate and burkeite. potassium and chloride concentration is reduced, at least in part, by subjecting the ashes to adiabatic cooling in a crystallizer producing glaserite and a chloride-rich purge stream. By leaching from glaserite, sodium sulfate is removed from the glaserite, leaving potassium sulfate. Recovered sodium sulfate and burkeite can be recycled and used as pulp forming chemicals. chloride and potassium removed may be further treated appropriately or disposed of.
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