| 摘要 |
The method is for producing cellulose pulp in a continuous digestion system in an energy-efficient manner. Cellulose chips are fed continuously with a transfer liquid in a transfer line to a top separator arranged at the top of a digester, for the separation of free liquid from the cellulose chips. The top separator has a withdrawal space in which free liquid collects. At least a fraction of the free liquid that has separated, with a temperature T<SUB>out</SUB>, is led in a return line from the withdrawal space of the top separator to a position to be used as transfer liquid. At least one pressurised withdrawal of black liquor is carried out in the digester essentially at the cooking temperature of at least 135° C. An additive liquid with a temperature T<SUB>in </SUB>is added at the withdrawal space of the top separator, where the temperature T<SUB>in </SUB>is greater than the temperature T<SUB>out</SUB>.
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