a process for the continuous cooking of cellulose pulp in which the cooking system comprises an impregnation vessel and a digester

摘要

"Method for the continuous cooking of cellulose pulp". The present invention relates to a procedure for the continuous cooking of cellulose pulp comprising an impregnation vessel (101) and a digester (102). the chips are impregnated in the impregnation vessel (101) and are fed after impregnation together with circulation fluid through a transfer line (103) to a top separator (105) over the digester (102) for cooking. . a fraction of the circulating fluid is extracted (withdrawn) in a top separator (105) and returned to the bottom of the impregnation vessel (101) via a return line (106). Black liquor is extracted from the digester (102) via a black liquor line (108) into the impregnation vessel (101). In accordance with the present invention, said method is characterized in that a heat exchanger (107) is disposed between the return line (106) and the black liquor line (108), which enables heat exchange. between the return line (106) and the black liquor line (108), but at the same time does not allow fluid exchange, and that the temperature of the black liquor in the black liquor line (108) after passing through the heat exchanger (107) having been cooled by 10 198 c - 15 198 c. (figure 1)