A new concept to reject perturbations in a TMP process due to raw materials properties variation

Wood chips properties variation is known as a source to provoke variability in thermo-mechamical pulping processes. This mainly includes density, moisture content and brightness of the chips as the raw materials that result in consuming more refining energy and bleaching agent as well as degrading product quality. To date, no concrete control strategy has been proposed to reject the effect of the raw materials variation especially due to the lack of on-line real-time measurement of the latter. Recent technological advancement fills up this gap which permits developing complementary control strategies in the perspective of more efficient TMP process. A new concept is proposed in this article to take the advantage of current technological advancements to improve TMP process efficiency.