Agitators, rotating

Operator comes Implement procedures and training into contact with, Interlock manway with agitator rotation agitator through manway scalping screen on manway CCPS G-22 CCPS G-23 CCPS G-29 Fisher 1990 ISAS84.01... 

In a forced vortex the angular velocity of the liquid is maintained constant by mechanical means, such as by an agitator rotating in the liquid or by rotation in the basket of a centrifuge. 

Calculate the theoretical power in watts for a 0.25 m diameter, six-blade flat blade turbine agitator rotating at N = 4 rev/s in a tank system with a power curve given in Figure 5.10. The liquid in the tank is shear thinning with an apparent dynamic viscosity dependent on the impeller speed N and given by the equation fia = 25(N)n 1 Pa s where the power law index n = and the liquid density p = 1000 kg/m3. 

Figure 5.3-5. Agitator rotation velocity vs. hydrogen flow and power consumption [15]. Agitator power...

The properties and composition of the hydrolysate are greatly affected by the hydrodynamic mode of the process. Thus, increasing the number of agitator rotations from 300 to 1000 per minute raises dimethylcyclosilox-ane content from 28 to 43% and at the same time visibly reduces the acidity and viscosity of the hydrolysate. 

Determine the turbulent power number for impeller geometry. Power number N P is a dimensionless variable [5] which relates impeller power P to such operating variables as liquid density p, agitator rotational speed N, and impeller diameter D as follows ... 

In laminar mixing conditions of Newtonian fluids, Po is linearly related to agitator rotational Reynolds number. Real... 

However, Remo has not found wide acceptance because of deviations between predicted and experimental values of Po. A widely accepted procedure assumes that the average shear rate during mixing is directly proportional to the agitator rotational speed, Na, that is. 

These tanks should be equipped with sweep-arm agitators rotating at approx 50 rpm or slow-speed, large-bladed, propeller-type agitators. Filter aid, once in suspension, is easy to keep in suspension. Tanks should have dished, coned, or slanted bottoms so that all liquid can be drained from the tank and so that in the precoat operation a minimum heel can be maintained during circulation of liquid between the precoat tank and the filter. 

Hydraulic System. Generally, for vertical pan dryers an hydraulic system is provided for the agitator rotation, the opening-closing of the dryer by a rapid device as bayonet and/or TRI-CLAMP and the lowering of the vessel for maintenance or cleaning purposes. The hydraulic components positioned on the dryer are normally ... 

Although this particular apphcation is well established, it only works if the probe is seeing a sample representative of the process. If plugging of wet sainile at the probe tip occurs, then fresh sample will not be seen. On such occasions, systems are available to insert/extract the probe between agitator rotations or air pressure can be used to blow the tip clean. Both should be avoided if at all possible. 

Figure 2.22. Schematic representation of the basic experimental situation in bio-process/bioreactor analyses, where the interactions between physical transports (kj ) and biokinetic rates (kh) in the liquid phase are thought to be representative for the process rates in the solid phase of cell mass (kf,). At the same time, response lags of measuring electrodes (k ) have to be taken into account. G, gas phase L, liquid phase S, solid phase or substrate E, enzyme or electrode I, intermediary metabolites or products P, end product N, nucleus R, ribosomes M, mitochondria a, anabolism jS, catabolism Fq = gas flow rate n = agitators rotational speed.

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