WASHING APPARATUS COMPRISING A FLOAT BODY
In a washing apparatus for washing cellulose pulp, comprising a vertical, column-shaped washing vessel (2), and a screen unit (7) which is movable in the washing vessel, during a screening phase, at a first speed, from an upper position to a lower position, and, during a return movement, at a substantially higher speed, from the lower position to the upper position, there is a float body (30) which exerts a buoyancy force on the screen unit.