PROCEDURE FOR CLARIFYING LIQUID SUSPENSIONS, PARTICULARLY THOSE PRODUCED IN PROCESSES OF THE WOOD-PROCESSING INDUSTRY

摘要

Procedure for clarifying in particular the liquid suspensions produced in the processes of the wood-processing industry, in said procedure fibrous solid matter being removed from the liquid. According to the invention, the clarification takes place in a fluidized bed reactor (1) in a liquid flow ascending from below and in which flow on top of the finely divided floating particles (7) is established a layer of fibre agglomerate (9) which binds to itself fibrous material from the liquid flowing through the layer. The rate of liquid flow in the reactor (1) may be maintained suitable by the aid of circulating the liquid. When the layer of fibre agglomerate (9) grows, agglomerate is removed as required from the reactor (1) through draining lines (10) thereto connected. By applying the procedure, lower solid matter contents are achieved in the clarified liquid than by clarification known in the art which applies the settling principle.