METHOD AND ARRANGEMENT FOR IMPREGNATION OF CHIPS

摘要

A method and an arrangement for the impregnation of untreated chips during the manufacture of chemical pulp. The untreated chips are fed without preceding steam treatment into an impregnation vessel (10) that comprises an upper part (11) with a first area A1 and a lower part (13) with a second area A2 that is larger than the first area A1 by a factor of at least r2-. The chips establish in the upper part (11) a level (14) of chips that is located at a level (h) above a level (18) of fluid consisting of liquor. The chips after passage of the upper part (11) pass through a transitional part (12), where an increase in area from the first area (A1 ) to the second area (A2) takes place, and it is here that the angle of repose of the chips is reduced.