Análise da viabilidade econômica da substituição do antiespumante no filtro lavador da linha de kraft marrom de uma fábrica de papel

Abstract

The pulp and paper industry has been growing and gaining space in the packaging market, and with it, the search for improved process performance has a direct impact on its production potential, always paying attention to sustainability associated with environmental benefits. In order to guarantee the maintenance of washing performance, inspecting costs with the defoamer, this work aims to analyze the economic viability of replacing defoamer in the brown kraft production line of a paper factory. The evaluation of the performance of Products A and B was carried out in the laboratory through the recirculation of long fiber liquor, initially 300 mL of liquor was recirculated for 5 minutes and another 15 minutes of recirculation with antifoam, evaluating the volume of foam reduced. In a specific dosage of 0.225 kg/m³ of Product A, the same amount was dosed, 20%, 30% and 40% more of Product B. The costs of each product and their dosages and the economic advantages were also raised, as well as the elaboration of an action plan for application through the 5W2H methodology. Product A lowered approximately 150 mL of foam, also at a dosage 30% higher than Product B, taking into account the replacement of antifoam with this proportion, a cost reduction of approximately 7,40% was obtained compared to the current value (with Product A). With this, the replacement of defoamer becomes economically feasible.