Chemical Processing Magazine
<<Mixers come in many sizes and are used in many different applications. When specifying a new mixer or a replacement, plant engineers need certain information. A good verbal description of the process is often the best starting point. Unless the new mixer must be a duplicate of existing equipment, details such as motor power, mixer speed, impeller type and diameter should be left flexible to take maximum advantage of recent developments and product features. Other characteristics such as electric voltage and tank dimensions must match the installation. Special features such as variable-speed drives, mechanical seals and materials of construction also must be described adequately.>>
Heat Transfer In Agitated Jacketed VesselsChemical Engineering Magazine
<<Agitator-equipped vessels with jackets for heating or cooling are drawing increased attention in the process industries. Apart from a growing importance in biotechnology (box, p. 94), such vessels are widely used in a variety of other process applications. Accordingly, engineers can benefit from a working knowledge of how heat-transfer and temperature-control principles apply to such vessels. The rate of heat transfer to or from an agitated liquid mass in a vessel is a function of the physical properties of that liquid and of the heating or cooling medium, the vessel geometry, and the degree of agitation. The type, and size of the agitator, as well as its location in the vessel, also affect the rate.>>
