6-blade impeller CD-6

for agitatorsaxial-flow

The Chemineer Concave Disc (CD-6) impeller is revolutionizing the field of agitated gas dispersion. In applications of high energy agitation and high gas rates, this impeller will significantly improve the mass transfer factor, kL a. Given the same conditions of power per volume and superficial gas velocity, mass transfer factors can nearly double when the CD-6 impeller is used instead of the conventional flat blade disc impeller. In addition to significantly improving mass transfer factors, the CD-6 impeller will handle at least 46% more gas before flooding than the flat blade disc impeller. This capability gives added benefit in operations where upset conditions could otherwise flood the flat blade disc style impeller. Most applications designed with the CD-6 impeller also use our HE-3 or XE-3 high efficiency impeller for pumping within the vessel. This configuration utilizes a combination of impellers; the bottom impeller is the CD-6 and the upper impellers, at times as many as four, are HE-3s or XE-3s. The CD-6 accomplishes the primary dispersion while the HE-3 or XE-3 high efficiency impeller provides good overall top to bottom flow and rapid blend times. In applications such as Fermentation, this combination results in uniform dissolved oxygen distribution within the fermenter and shorter blend times for additives.