The invention relates to an extract deep purification and edulcoration process in the
manufacturing technology of
papermaking tobacco sheets. The process comprises the following steps: a, tobacco waste including tobacco stems, tobacco sticks and tobacco
powder is fully soaked in hot water and then extracted; b, the mixture of tobacco waste and water is fed into a squeezer and then squeezed for
solid-liquid separation, and the liquid part is extracted crudely and is screened through a linear vibrating screen for
solid-liquid separation; c, the liquid separated through the linear vibrating screen enters a filter aid
process module to be processed through deep
macromolecule flocculation, wherein an edible flocculating agent is adopted, the addition proportion is 0.1 to 0.8%, and the
flocculation time is 5 to 50 minutes; liquid processed through deep
macromolecule flocculation enters a primary horizontal spiral
discharge settling centrifuge to be separated; and e, the liquid separated by the
centrifuge in step d is pasteurized at the temperature of 60 to 70 DEG C for edulcoration, and then enters a concentration
system to be concentrated. The process can effectively remove
macromolecule particles, improves the concentration efficiency and ensures the quality of concentrate.