Sludge settling and thickening apparatus.

摘要

A sludge decanter thickener comprises a compaction chamber for compacting the sludge by means of a helical screw discharging the compacted sludge through a hole provided with an adjustable diaphragm. The decanter is characterized in that the screw comprises at the end thereof an axial nose (4) arranged through the discharge hole (6) and cooperating with the diaphragm (5) to close said hole in the absence of sludge. The invention applies to the processing of fluid sludges charged or not with fibrous materials.