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Calculates agitator speed and power requirement for a given reactor geometry and mixture properties. Scale of Agitation 1 is quite mild, 3 is normal, 6 is vigorous and 10 is violent. Characteristic of application requiring minimum fluid velocities to produce a flat but moving fluid batch surface
May 12, 2011 May 12, 2011 Download Agitator Power Requirement and Mixing Intensity Calculator. Agitator Power Requirement and Mixing Intensity Calculator. Use this MS Excel spreadsheet to calculation the power requirements and mixing intensity for a defined mixing application. Disclaimer: All software provided As-Is with no warranty, expressed or implied, available
Mechanical Agitator Power Requirements for Liquid Batches _____ Course Content Mechanical Agitator Power Requirements for Liquid Batches can be determined from the energy balance equation and empirical correlations. Figure 1 represents a typical industrial system used for mixing a batch liquid (Figures are located at the end of the Course
POWER CONSUMPTION OF AGITATORS @ (Flow number) 1 tan 3 3 a Q a a a nD q N q nD q K D n k D W v S E S It is a function of the volumetric flow rate and the kinetic energy Values of N Q HE-3 high-efficiency impeller 0.47 Disk turbine 1.3 Four-blade 45q turbine (W/D 0.87 a)=1/6 Marine propellers (square pitch) 0.5 N Q Impeller (Power number) 2 2 2
Scale-up Ratio, R = (V2/V1) 1/3. Shaft speed scaling is done based on following relation: N2 = N1 . (1/R) n. The value of n, called the scaling exponent, depends on the physical result to be scaled. Sacle-up for Equal Reynold's No. Tip Speed Power / Volume Froude No. Shaft Speed
the same Power number as a vertical cylindrical tank. SCALE-UP OF MIXING SYSTEMS The calculation of power requirements for agitation is only a part of the mixer design. In any mixing problem, there are several defined objectives such as the time required for blending two immiscible liquids, rates of heat transfer from a heated jacket per unit
c. Types of flow in mixing vessel d. Selection of Agitators e. Energy utilization in Different types of agitators By: Dr.P.A.Joshi, DDU, Nadiad 2. Agitator Design …..31 a. Introduction to Mixing Process Evaluation b. Calculation of Power requirement for Newtonian fluid c. Introduction to non-Newtonian fluid and power requirement for non
mixers is unique for chemical process equipment. Mechanical design does not end with the shaft, since strength and practical issues remain for the impeller. Another part of mixer design is the tank in which the mixer is used, since tank dimensions inﬂuence mixer features, especially shaft length. Conversely, a
Data Lookup and Calculations Fluid Mixing purpose Degree of agitation Fluid density Fluid viscosity mu kg/m-s Reynolds number Pumping number Pumping capacity Power ft-lbf/s Power number - lower impeller Power number - upper impeller Total power (assume additive) Q NQ Mixing zone calculation, Np^(1/3) * Nre Mixing zone Mixing time, 95%
Jan 03, 2019 Jan 03, 2019 Based on the Agitator, we need to consider the Flow number, find from below table. Nre = D x D x N x rho / myu. rho - Density, myu - Viscosity. From the estimated Power number ( Np ), We can Calculate the Power required. Power required ( P ) = Np x rho x N^3 x D^5. You will be getting Power P in KW
Mixing Calculators White Mountain Process is happy to provide these free mixing calculators for your use. These are made available to help you do preliminary mixer sizing, mixtank volume calculations, some mixer mechanical design calcs, etc. The mixer selection program allows you to calculate flow rates and power draw of mixing impellers, see what […]
Jul 15, 2003 Jul 15, 2003 However, power and mechanical design calculations still are important. Figure 2. Blade Configuration Influences Mixing Intensity Mixing intensity can be determined for many blade configurations besides common pitched-blade turbines, such as hydrofoil impeller (left). The calculations do not lend themselves to anchor impeller configurations (right)
The quality of mixing depends on the effective energy input by unit mass or unit volume of fluid. It has been found, for example, that the rate of oxygen transfer in aerated fermentors equipped with turbine mixers is nearly proportional to the net mixing power input per unit volume of broth (Hixson and Gaden, 1950).The relationship between mixing power and the type, dimensions and operation
than blending time. Mixing equipment has standard geometrical configuration (baffled cylindrical vessel with diameter T = 1200 mm, T/d = 3.3; H 2 /d = 1, H/T = 1 ). Dimensionless blending time of high-speed impellers in turbulent flow regime Type of impeller T/d H 2 /d QW m Six-blade turbine with disk (Ruschton turbine), CVS 69 1021 3.3 1
May 13, 2019 May 13, 2019 Accordingly, this agitator will have much larger components such as gearbox and shafting, and will provide a greater degree of agitation. For More Information on Mixing Impeller Power. For more information about mixing impeller power, email [email protected] or call us at 330-468-1850
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