Simulation of the recovery process of fibers generated during paper production / Simulação do processo de recuperação de fibras geradas durante a produção de papel

Samantha Silva Andrade, Cristiane de Souza Siqueira Pereira, Janaína Martins Theodoro, Beatriz Maria Baffa Lima, Marisa Fernandes Mendes

Abstract


The disposal of fibers or materials that contain fibers characterizes a waste of raw material presenting economic value. Furthermore, process costs also increase as a result of this waste since, in addition, to fiber loss, an increase in the volume of the final residue (sludge) to be handled, transported and disposed of adequately also occurs. Therefore, the water system of a paper machine should be designed so as to reuse residual fibers. In this context, theaim of this study was the computational simulation of a decantation process for water and fiber recovery order aiming at reuse. Minimizing wastewater and generated waste can contribute to the "closed loop" or zero waste management system. The process simulation was performed in batch mode using the SuperPro Designer v9.0 process simulator, assuming a settling tank for phase separation. The analyzed process variables were feed flow, load composition and temperature. A feed rate of 35 kg/h containing 30% fiber and 70% water was considered, with adetention time in the decanter of 900 seconds.A 98% efficiency was obtained in the simulation, indicating satisfactory results and reaching reuse expectations since a standard efficiency of 80% is expected for this type of equipment.

 


Keywords


Fibers; paper; paper machine; computational simulation; simulation; residue; paper industry; water; recover; effluent; cellulose.

References


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