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One of the contributing factors to air entrainment at the beginning of the water treatment process in AguaClara plants is the waterfall effect inside the LFOM. To minimize this waterfall effect the following retrofit designs were calculated and tested in lab:
-Pipe Inside LFOM: A pipe of a small diameter would be placed within LFOM with about a few inches of separation between the outer surface are of the pipe and the inner surface area of the LFOM. t
-Vertical/Inclined Plane: Many A verticle or one
-bucket Bucket with holesHoles:
-bucket Bucket with out holesHoles:
See the retrofit designs page for visuals of each theory.Our first goal was to narrow down from 4 different designs to our top choice to facilitate and expedite lab testing.
From the four retrofit design, the most viable option is the "verticle/Inclined Plane." ********Biny this is wer eyou would input your stuff***************
Calculations
As a team, we worked in MathCAD to calculate the distance that the jets of water coming into the LFOM would travel inside the LFOM. If we discover that a bucket inserted into the LFOM below the orifices can catch the jets before they hit the water, the bucket theory will be a viable option. We determined that all but the top three jets of water would in fact hit the far wall of the LFOM before reaching any size bucket that we could place in the LFOM. Also, we used MathCAD to determine the size of the orifice needed in the bottom of the bucket to maintain the plant flow rate. We determined that the orifice would have to have a 4.5cm radius, which was far too large for our buckets. The MathCAD calculations eliminated both the teacup theory and the variation on that theory as possible solutions. The MathCAD files are attached.
Jet Distance Calcs 7-13-09.xmcd
CDC_Retrofit_Designs.xmcd
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