| 摘要 |
An improved pug mill mixer (10) including at least one homogenizer shaft (34a, b) extending transverse to the direction of the pug mill shafts (44a, b) for providing a zone of high shear mixing. The pug mill mixer of the present invention is particularly well-suited to mix dry, fine powders with liquids and pasty, sticky sludges, such as flue gas desulfurization (FGD) sludge. The mixer includes a container (12), within which is disposed at least one pug mill shaft (44a, b) having a series of pug mill paddles (46a, b) coupled to and radially protruding from the pug mill shafts for mixing the mixture and transporting the mixture along the pug mill shafts. The homogenizer shafts (34a, b) extend in a direction transverse to the pug mill shafts. Homogenizer mixing elements (36a, b) are coupled to and radially protrude from the homogenizer shafts. The homogenizer shafts rotate at a relatively high speed for producing a zone of high shear mixing. A liquid injection nozzle (28) injects liquid into the container near the feed port (14) of the container. |
