ZERO DISCHARGE PROCESS OF PULPING WASTE LIQUID OF ALL-COTTON STRAW CHEMI-MECHANICAL PULP

摘要

A zero discharge process of pulping waste liquid of all-cotton straw chemi-mechanical pulp. The process comprises: firstly performing front-end high concentration extraction of pulping waste liquid, then performing evaporation and concentration of the high concentration pulping waste liquid, recycling evaporation and condensation water, and recycling evaporation residue fluid, so as to implement the zero discharge of the pulping waste liquid finally. The front-end high concentration extraction of the pulping waste liquid comprises: extracting the pulping waste liquid in the procedures of squeezing, pulp washing, filament rolling, drug addition and pulp washing.