Apparatus for countercurrent washing of mother liquor from solid products

Claim 1

AN INSTALLATION FOR CONTINUOUSLY WASHING THE MOTHER LIQUOR OUT OF SOLID PRODUCTS BY MEANS OF A WASHING LIQUID, COMPRISING A VERTICALLY MOUNTED WASHING VESSEL, AN INLET IN THE UPPER PORTION OF SAID VESSEL FOR INJECTING SOLID PRODUCT CONTAINING MOTHER LIQUOR INTO SAID VESSEL FROM THE TOP, AN INLET IN THE BOTTOM PORTION OF SAID VESSEL FOR INTRODUCING WASHING LIQUID FROM BELOW, A DISCHARGE DUCT IN THE UPPER PORTION OF SAID VESSEL FOR DISCHARGING MOTHER LIQUOR AND WASHING LIQUID, AND A SETTLING BOTTOM FOR THE SOLID PRODUCT IN THE LOWER PORTION OF SAID VESSEL, SAID SETTLING BOTTOM BEING CONSTITUTED BY THE UPPER SURFACE OF AN UPWARDLY INWARDLY TAPERING-OFF HOOD-LIKE STRUCTURE WHOSE BOTTOM EDGE IS JOINED ABOUT ITS PERIPHERY TO THE WALL OF SAID VESSEL, SAID SETTLING BOTTOM BEING PERFORATED AND HAVING GUTTER-LIKE INDENTATIONS WHICH INCREASE IN CROSS-SECTION AND IN DEPTH AND LEAD FROM THE HIGHEST POINT OF SAID SETTLING BOTTOM STRAIGHT TO THE WALL OF SAID VESSEL WHERE THEY END IN OUTLET OPENINGS FOR THE SOLID PRODUCT AND THE WASHING LIQUID, SAID INLET FOR WASHING LIQUID DEBOUCHING INTO THE CAVITY BETWEEN THE LOWER SIDE OF SAID SETTLING BOTTOM AND THE BOTTOM OF SAID VESSEL.