Patent ID: 6213633
Filing Date: 2001-04-10
Classification: B01F,B05C

Abstract:
A mixing device which is suitable for mixing two or more fluid materials; comprising a generally tubular column (1), within the column (1) there being an internal longitudinally aligned core (2), with a space between the column (1) and the core (2) defining a channel (7) which is suitable for the flow of the fluid materials in an overall longitudinal direction through the column (1), the channel (7) having an inlet end (4) and an outlet end (5) for the respective inlet and exit of fluid material into and out of the channel (7), the column (1) having an inner surface which faces the core (2), said inner surface having one or more helical grooves thereon having a first twist direction and the core having an outer surface which faces the column (1), said outer surface also having one or more helical grooves thereon having a second twist direction opposite to the first twist direction, the said grooves comprising the channel wherein the depth of the one or more grooves (3) in the column (1) is greater in the vicinity of the outlet end (5) of the column (1) than in the vicinity of the inlet end (4).