Method for chemical treatment of suspended solids

Claim 1

IN A METHOD FOR THE CONTINOUS TREATMENT OF WOOD PULP, IN COMBINATION, THE STEPS OF CONTINUOUSLY INTRODUCING A LIQUID SUSPENSION OF WOOD PULP INTO THE LOWER PORTION OF A REACTION VESSEL SO THAT WOOD PULP DURING ITS INTRODUCTION PUSHES AGAINST THE WOOD PULP ALREADY INTRODUCED INTO SAID VESSEL AND MOVES SUCH WOOD PULP UPWARDLY WITHIN SAID VESSEL; INTRODUCING A LIQUID REAGENT FOR THE TREATMENT OF SAID WOOD PULP INTO SAID REACTION VESSEL AT A LEVEL ABOVE THE LEVEL OF INTRODUCTION OF THE LIQUID SUSPENSION OF WOOD PULP; REMOVING LIQUID FROM SAID REACTION VESSEL AT A POINT BELOW THE LEVEL OF INTRODUCTION OF SAID SUSPENSION SO AS STO PERMIT SAID LIQUID REAGENT TO MOVE DOWNWARDLY INSAID VESSEL SO AS TO TREAT IN COUNTERCURRENT THE UPWARDLY MOVING PULP; AND WASHING THE THUS REAGENT-TREATED WOOD PULP IN SAID REACTION VESSEL AT A LEVEL ABOVE SAID LEVEL OF INTRODUCTION OF SAID LIQUID REAGENT AND A WASHING LIQUID INTRODUCED INTO SAID REACTION VESSEL AT A LEVEL ABOVE SAID LEVEL OF INTRODUCTION OF SAID LIQUID REAGENT AND MOVING DOWNWARDLY IN COUNTERCURRENT DIRECTION TO THE UPWARD MOVEMENT OF SAID REAGENT-TREATED WOOD PULP, WHEREBY TH WOOD PULP ORIGINALLY INTRODUCED INTO SAID REACTION VESSEL IS CHEMICALLY TREATED AND WASHED IN THE SAME REACTION VESSEL.