Orifice Size and the Dual Scale Design for the Nonlinear Alum Doser
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h5. Figure 1: Doser Overview
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Figure 1: Doser Overview |
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Figure 2: Close up of nonlinear scale | ||
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| {center:class=myclass} h5. Figure 2: Close up of nonlinear scale {center} |
Abstract:
During the fall semester of 2009, the Nonlinear Chemical Dosing Team developed the dual scale, orifice-based doser in order to be able to deliver both turbulent and laminar alum flow. Like its linear predecessor, this doser must automatically increase or decrease the alum solution to maintain a target dosage set by the operator as the plant flow changes. As an additional feature, the two different scales provide the operator with additional precision through a low dosage (5-25 mg/L) and a high (20-100 mg/L) alum dosage range. Refer to attached file Doser Diagrams and Dual Scale for editable files for diagram and dual scale.
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