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{composition-setup} cloak.toggle.exclusive=false {composition-setup} h1. Demo Plant Spring 2008 Sedimentation Tank Design |
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h2. Design Goal |
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h2. Theoretical Design |
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h3. Principle Formulae |
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h3. Mathcad Files |
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Algorithm
Design Results
Perpendicular Open Top Design
The new sedimentation tank design proposed in Spring 2008 will address the problem of uneven flow lengths, rates, and shears through each lamella of the sedimentation tank in the Spring 2007 Demo Plant. This problem is further described in the Demo Plant Problems Encountered page.
The proposed sedimentation tank will be oriented perpendicular to the axis of the flocculator. Additionally, to accommodate the new design, water will exit the flocculator from the top, instead of the bottom. In order to eliminate differences in lengths of flow paths through the sedimentation tank, water exiting the flocculator will be split into several tubes of equal diameters and lengths, which will enter the bottom of the sedimentation tank. The tubes entering the sedimentation tank will be evenly spaced.
The sedimentation tank itself will be redesigned so that lamella still form the optimal 60 degree angle. However, the lamella will now guide the water in a path parallel to the axis of the flocculator, so that the whole tank will have an incline, and will need to be either very bottom-heavy, or have a support for the upper ends of the lamella. This design, along with the new entry method, will normalize the head loss through individual channels in the sedimentation tank.
The proposed sedimentation tank will also incorporate an open-top design, similar to the flocculator of the Fall 2007 Demo Plant.
This design also allows us to consider the incorporation of a drain for built up sediments in the sedimentation tank, adding the functionality to clean the sedimentation tank while the plant is still running.
The MathCAD design and AutoCAD drawing of the proposed sedimentation tank have been uploaded.
Open Top Design
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Open Top Parallel Lamella Design
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Construction
Materials
Description of Construction Process
Pictures of Finished Product
Post-Construction Modifications
What didn't work
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h3. Algorithm h3. Design Results h4. {toggle-cloak:id=Perpendicular Open Top Design}Perpendicular Open Top Design {cloak:id=Perpendicular Open Top Design} The new sedimentation tank design proposed in Spring 2008 will address the problem of uneven flow lengths, rates, and shears through each lamella of the sedimentation tank in the Spring 2007 Demo Plant. This problem is further described in the [Demo Plant Problems Encountered] page. The proposed sedimentation tank will be oriented perpendicular to the axis of the flocculator. -Additionally, to accommodate the new design, water will exit the flocculator from the top, instead of the bottom.- In order to eliminate differences in lengths of flow paths through the sedimentation tank, water exiting the flocculator will be split into several tubes of equal diameters and lengths, which will enter the bottom of the sedimentation tank. The tubes entering the sedimentation tank will be evenly spaced. The sedimentation tank itself will be redesigned so that lamella still form the optimal 60 degree angle. However, the lamella will now guide the water in a path parallel to the axis of the flocculator, so that the whole tank will have an incline, and will need to be either very bottom-heavy, or have a support for the upper ends of the lamella. This design, along with the new entry method, will normalize the head loss through individual channels in the sedimentation tank. The proposed sedimentation tank will also incorporate an open-top design, similar to the flocculator of the Fall 2007 Demo Plant. This design also allows us to consider the incorporation of a drain for built up sediments in the sedimentation tank, adding the functionality to clean the sedimentation tank while the plant is still running. *The* *[*MathCAD design*|^Demo Plant Sedimentation Tank.xmcd]* *and* *[*AutoCAD drawing*|^Demo Plant Sedimentation Tank.pdf]* *of the proposed sedimentation tank have been uploaded.* !Demo Plant Pictures and Figures^Demo Plant Sedimentation Tank AutoCAD.jpg|thumbnail! {cloak} h4. {toggle-cloak:id=Open Top Design}Open Top Design {cloak:id=Open Top Design} blob {cloak} h4. {toggle-cloak:id=Open Top Parallel Lamella Design}Open Top Parallel Lamella Design {cloak:id=Open Top Parallel Lamella Design} blob {cloak} h2. Construction h3. Materials h3. Description of Construction Process h3. Pictures of Finished Product h2. Post-Construction Modifications h3. What didn't work h3. How it was remedied |