Description of Mixers in Pipelines with radial flow impellers at Post Mixing

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This is a continuation of the Process Intensifier - Optimization with CFD: Part 1 paper.

Process Intensifiers with Dual Radial Impellers

LTR	HGR

Figure 1: Lightnin Line Blender with dual radial RP4 impellers and a long Z-plate. click on the picture for a bigger picture	Figure 2: Hayward Gordon In-Line Mixer with dual radial RP4 impellers and a shortened Z-plate and flow straightener. click on the picture for a bigger picture

Figures 1 and 2 show schematically the general concept of a Process Intensifier with radial flow impellers. The differences between the two models are:

Blade heights
Distance between the Z-plate pipe separation ends
Presence of a flow straightener

Flow always enters the lower chamber, going through the orifice and out the upper chamber. The general flow pattern in the figures is from right to left. A secondary fluid to be mixed would enter the lower chamber directly under the lower impeller. Each chamber has one radial impeller.

Model LTR: The Lightnin Line Blender model (Figs. 1,5) has dual 5" (127 mm) RP4 radial 4-bladed paddles with a blade height to impeller diameter ratio of h/D = 0.20.

The distance of the centerline of each impeller to the top and bottom of the pipe is 3" (76 mm) and the spacing between the impellers is S = 4" (102 mm). The distance between the Z-ends is 19.7" (500 mm), or approximately L/T = 2.0. The orifice diameter is 5 1/8" (130 mm). That makes the linear velocity through the orifice 1026 FPM (5.21 m/s) at 1100 GPM and 606 FPM (3.08 m/s) at 650 GPM. The orifice plate is in the horizontal center of the pipe.

Model HGR: The Hayward Gordon In-Line Mixer model (Figs. 2,5) has dual 5" (127 mm) RP4 radial 4-bladed paddles with h/D = 0.3. The distance of the centerline of each impeller to the top and bottom of the pipe is 3" (76 mm) and the spacing between the impellers is S = 4" (102 mm). The distance between the Z-ends is 7.9" (200 mm), or approximately L/T=0.75. The orifice diameter is also 5 1/8" (130 mm). That makes the linear velocity through the orifice 1026 FPM (5.21 m/s) at 1100 GPM and 606 FPM (3.08 m/s) at 650 GPM. There is also a vertical flow straightener (not shown in Fig. 2) prior to entering the lower flow chamber (see Fig. 5).

Continue with other Experimental Design subtopics...

Axial Impeller Process Intensifiers CFD Solid Shape Models Standard Geometries

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