Patent ID: 6966970

Claim:
Method for supplying washing liquid to a digester ( 1 ) for cellulose pulp and a subsequent diffuser washing device ( 2 a , 2 b ), with washing liquid for the diffuser wash being collected from a storage tank ( 4 ) and with washing liquid being conducted to the bottom of the digester for the purpose of obtaining a dilution and/or displacement wash at the bottom of the digester, characterized in that the washing liquid from the storage tank ( 4 ) is pressurized to a first pressure level via a first feed pump (P 1 ) and conducted onwards to a main feed line ( 10 ), a first constituent flow ( 11 ) is drawn from the main feed line ( 10 ), at a first upstream point 10 a ) on the main feed line, to a diffuser pump device (P 2 a , P 2 b ), which pressurizes the washing liquid to a second pressure level, and is conducted onwards ( 12 a , 12 b ), at this second pressure level, to washing liquid inlets ( 14 a , 14 b ) of a diffuser washing device, wash filtrate from a washing liquid outlet ( 15 a , 15 b ) of the diffuser washing device ( 2 a , 2 b ) is returned to the main feed line ( 10 ) at a second point ( 10 b ) on the main feed line, which point is located downstream of the first upstream point ( 10 a ) on the main feed line, a combined flow of washing liquid from the storage tank ( 4 ) and wash filtrate ( 16 ) from the diffuser washing device ( 2 a , 2 b ) is conducted, via the main feed line ( 10 ), to a digester pump (P 3 ) which pressurizes the combined flow to a third pressure level and conducts the combined flow ( 17 ) onwards, at this third pressure level, to washing liquid nozzles ( 18 ) which are arranged at the bottom of the digester.