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Optimum Mud Mixing tank configurations, and bottom line mixer costs and efficiencies:

Priced Mixer: Mud Slurry Mixing System
Mud Slurry Mixer Engineering Specifications

Mud Slurry Mixing System 
Pricing: 20,000 gallon Mud Slurry Mixing SystemA 20,000 gallon tank is typical for mud mixing processing.  The key question to consider is what might be the optimal configuration for this application and does that tank configuration influence the bottom line.  

Overland transport is generally limited to 12' diameter tanks.  For a vertical cylindrical tank, to achieve 20,000 gallons, the resultant straight wall would need to be 25' tall.  If a single mixer is used for this application, a rough estimate for this mixer would be about $32,000.  This make no mention of the related design costs required for the tank structure that would need to support the design loads (weight, torque and bending moment) of a top mounted mixer for a vertical-on-tank-centerline mounting arrangement.  

In consideration of numerous other mixing applications, such as flocculation for example, it is quite common to use multiple mixers in the floc basin rather than to use either one or two large mixers.  This concept can prove to be quite useful in handling slurries or slurry mixing for the purpose of waste oil recovery.  There are numerous reason for the use of multiple mixers.  

In this instance the initial cost of four or five (4-5) smaller mixers to handle the 20,000 gallon capacity is significantly less expensive than the use of one (1) large mixer.  It also evident that the performance of multiple mixers in a rectangular tank design for slurry suspension is vastly superior.  From a common sense view, covering the overall rectangular area with smaller circles (diameter of the impellers) is just better than a few or even one large one.  There are still even more advantage and considerations such as reduced continual energy demand (horsepower).  

Pricing: 20,000 gallon Mud Slurry Mixing SystemUsing this simple concept, in conjunction with mixer optimums, it is quite possible to drive down costs as well as to gain system efficiencies.  What is meant by a mixer optimums is that mixer costs are directly tied to torque levels, or more simply stated, the size of applied mixer, where the related cost of a larger mixer is significant versus multiple smaller ones.  In other words, the efficiencies of building 40 or 100 mixers of a smaller size compares favorably to a larger mixer that is produced in quantities between 1 and 10 per year.  For numerous applications a large mixer is the only option, however that may not be the case when considering mud or slurry mixing.   

If we were to consider an 8.5' wide x 9' tall x 38' long rectangular tank, to achieve the 20,000 gallon requirement, where it is assumed that the floor footprint is available to accommodate such a tank, there may be numerous advantages to consider.  In this particular case, due to the above stated mixer efficiencies, we considered using five (5) mixers, subdividing the overall volume into five equal rectangular sections.  The following advantages resulted:

  1. The first is related to the tank itself where the mixer design loads are distributed over the length of the tank.  In short a 9' tall wall with an 8.5' span is a much less stressful and therefore more economical as compared to the single mixer tank design. 

  2. The continual energy consumed by the multiple mixer design is 1/2 that of the single mixer design.  In this case, the laws of physics govern the solid suspension requirement.  Obviously, this may not be intuitive, however the result is apart of mixer process design optimization.  Always remember that mixer gearboxes transform horsepower into torque (the magic black box).  Torque optimums result from the mixer optimums stated above.    

  3. The initial cost of five (5) mixers was 73% of the cost of one (1) single large mixer.  This resulted directly from the consideration of mixer optimums.  

  4. Although there are five separate simple beam arrangements to span the 8.5' wide span, the cost of the simple rectangular tank is vastly less expensive than the construction of a 12' x 25' tall tank (in carbon steel), which may have to be built on site.  Remember to consider the applied design loads (torque, weight & bending moment) of the one (1) large complex mixer design.  


Industrial Portable Mixers 
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