Calculating tank volume viscosity turnover mixer
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Impellers may be classified as an open- or disc-type. This information is also necessary when determining the spacing between the impellers. The number of impellers depends on the type of impeller, the maximum height of the media inside the vessel, vessel diameter, and specific media gravity. There could be more than one impeller installed in an agitator shaft. A welding connection is more hygienic because it prevents material-build on the fasteners and fittings. The agitator blades are attached to the hub by welding or screwing. The hub is directly connected to the shaft through a shaft key and a grub screw. Impellers mainly consist of a hub and blades. It induces fluid flow and shear patterns as it rotates. It is responsible for exerting energy directly to the materials being mixed. The impeller is considered the most critical component of agitators that determine the flow pattern, efficiency of the homogenizing process, and mixing parameters. Sealings are also used to prevent material build-up.
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Couplings, end caps, and other devices are used to build the shaft assembly. The shaft is connected to the motor’s driveshaft and transmits the torque to the impeller. Viscosity, specific gravity, and solid content of the media.The power requirement of an agitator depends on many factors such as: It produces the required torque to induce flow and shear to the media at a controlled degree. Chapter 2: Parts of an AgitatorĪgitators consist of three main components: Motor Component They prevent the formation of concentration and temperature gradients and ensure uniform consistency in a mixture. On the other hand, agitators maintain homogeneity and equilibrium in an existing mixture. When a component enters a mixer, it is often in a “pure” state and leaves combined with other components. These components may be of the same or different phases (e.g., solid-liquid, liquid-liquid, gas-liquid). Mixers are equipment that rapidly blends two or more components together. The terms “agitators” and “mixers” are often used interchangeably, but they technically do not mean the same thing. Agitators are widely used in many industries, including food and beverage, pharmaceutical, agricultural, biotechnology, paint, and water treatment industries. Viscosity and sensitivity to shear stress are essential considerations when selecting an agitator. However, selecting the appropriate agitator type, sizing, and design for the specific nature of media is crucial. They can also work with slurries, suspensions, and highly viscous liquids. Maintaining a consistent temperature of the solution inside a vesselĪgitators can handle liquid, gaseous, and solid (e.g., granules, powders) media.Promoting chemical reaction inside a reactor.Maintaining solutions in a mixed state and preventing concentration gradient.Homogenizing solutions and suspensions to achieve a uniform consistency.The flow of the media is kept at a uniform rate and pattern.Īgitators can perform diverse functions in any industrial plant, which include:
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The work exerted by the impeller induces the flow and shear of the media inside the tank, causing a single or multi-component media to homogenize. They work by rotating immersed impellers at a controlled speed, also called revolutions per minute (RPM).
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Agitators are equipment used to homogenize media inside a tank.