Process for continuous cooking of pulp

Details Process for continuous cooking of pulp Process for continuous cooking of pulp

D - Textiles, Paper

21

C

D21C 3/24 (2006.01) D21C 7/00 (2006.01) D21C 7/14 (2006.01)

Patent

CA 2149423

The present invention relates to a digester for continuous cooking under raised pressure and temperature of fibre material in a vertical digester (1), where input of fibre material and cooking liquid takes place at the top of the digester, withdrawal of spent cooking liquor is carried out from at least one digester strainer girdle (1D) between the top and the bottom of the digester, and fibre material is fed out from the bottom (1C) of the digester, wherein an existing digester (1) is fitted with an additional di- gester strainer girdle (2) above the lowest strainer girdle (1B) of the digester so that the temperature in all the participatory coo- king zones in the digester can he kept at essentially the same temperature level.

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