Tank geometries

Jet Aerators. Jet aerators are a cross between the diffused and mechanical aerators. Air and water are pumped separately under the water surface into a mixing chamber and ejected as a jet at the bottom of the tank or pond (Fig. 3f). Jet aerators are suited for deep tanks and have only moderate cost. Disadvantages include high operational costs, limitations caused by tank geometries, and nozzles that can clog. Additionally, they require blowers. 

QUENCH TANK GEOMETRY Quench tanks can have any of the following three types of geometiy ... 

An Excel spreadsheet program (Example 7-l.xls) was developed to determine the theoretical power of any agitator type with given fluid physical properties and tank geometry. 

More complex relationships can of course be derived, depending on the particular tank geometry. 

For the cylindrical tank geometry the mass as a function of head is... 

Bacteriological sulfur, 23 577-578 Bacteriophages, 3 135 12 474 in fermentation, 11 46 Bacteriorhodopsin, 20 826, 840 photochromic material, 6 603 Bacteriosins, 12 76. See also Bacteriocins Bacteriostatic water, 18 714 Bacterium lactis, 11 7 Baculovirus expression system, 5 346 Baddeleyite, 21 489 26 623-624 colorants for ceramics, 7 346t Badische Anilin und Soda Fabrik (BASF) terpenoid manufacture process, 24 481 Baeyer-Villiger oxidation reactions, 14 592 chiral recognition by enzymes, 3 675 microbial, 16 401 Baffled shellside flow, 13 262 Baffles, in stirred tank geometries,... 

Stirred tank geometries, for mixing and blending, 16 669-671 Stirred tank reactor(s) (STR), 9 660, 15 697-698... 

Mixing of elastic liquids is very strongly dependent on the type of mixer and the tank geometry, as well as the rheological properties of the liquid so that at a particular value of ReM the power drawn may be lower or higher than that for a Newtonian liquid. 

The type of agitator and tank geometry required to achieve a particular process result, is determined from pilot plant experiments. The desired process result may be the dispersion or emulsification of immiscible liquids, the completion of a chemical reaction, the suspension of solids in a liquid or any one of a number of other processes [Holland and Chapman (1966)]. 

The tank dimensions are determined according to standard tank geometries as used by the Denver Company (United States). Tank shell thickness is sized according to the limitations imposed by the Australian design standard for pressure vessels (AS1 210 Ref. T1). The tank contents are non-flammable but highly toxic and corrosive, appropriate safety features are recommended. Details of the calculations are given in Appendix J. 

For a given impeller and tank geometry, the impeller Reynolds number determines the flow pattern in the tank ... 

K = sl constant, dependent on the agitator type, size, and the agitator-tank geometry,... 

Coating suspension preparation is critical to successful and consistent coating. The suspension must be free of air and uniformly mixed. Selection of tank geometry is important to achieve suspension homogeneity. Long tall vessels that minimize the exposed surface are preferred. Some polymers require low shear mixing. Scale-up should include evaluation of mixer speed, suspension preparation, and hold times at both the development and the launch sites. 

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