Method and bleaching line with a main conduit for wash liquor

A bleaching line for bleaching of cellulose pulp, having at least two bleaching steps comprising:

• a first and a second bleaching step, as seen in a flow direction of the cellulose pulp, the bleaching steps having a first wash apparatus and a second wash apparatus for the cellulose pulp arranged after the first and the second bleaching steps, respectively, and in which wash liquor and dilution liquor are led in counter-current to the flow direction of the cellulose pulp through the wash apparatuses of the bleaching steps in a bleach line,
• the wash liquor being supplied in a main conduit that is arranged in parallel to the bleaching line,
• a first branch conduit connected to an inlet of the second wash apparatus for carrying a wash liquor to the second wash apparatus,
• a second branch conduit connected to an outlet of the second wash apparatus for carrying a first portion of a wash filtrate away from the second wash apparatus to the main conduit,
• a third branch conduit connected to an inlet of the first wash apparatus for carrying a second portion of the wash liquor to the first wash apparatus,
• a fourth branch conduit connected to an outlet of the first wash apparatus for carrying a second portion of the wash filtrate away from the first wash apparatus to the main conduit, the first, second, third and fourth branch conduits being directly connected to the main conduit with the first branch conduit arranged first, as seen in a direction of a flow in the main conduit, and the second to fourth branch conduits in succession thereafter so that the first, second, third and fourth branch conduits are in direct fluid communication with one another via the main conduit.