| 摘要 |
The present invention relates to a method and a device for continuously prod ucing pulp in which finely divided fibre material, preferably wood chips, is impregnated in a first vessel (1), preferably by b eing fed in at the top (2) and fed out from the bottom ( 3) of the said vessel (1), in which cooking pressure essentially prevails in the said first vessel (1) and the chips are heated and impregnate d with the aid of displacement by black liquor in countercurrent and drawing off from t he said first vessel (1) is effected from at least one d raw-off screen (4), in which the chips which have been thoroughly impregnated with b oiling hot black liquor are transferred to the top (5) o f a steam-phase digester (6) from which pulp is fed out at the bottom (10) and w hich possesses at least one screen girdle (8) for drawin g off spent liquor, with at least 50% of the quantity of liquor required for the c ooking reaction, and allocated for this purpose, being s upplied separately to the steam space (7) of the digester (6), preferably in the for m of finely divided drops. Whereby the balance (27) of c ooking liquor preferably is added to a lower countercurrent digesting zone (14).</S DOAB>
|
