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Finally got my suction line to stop clogging on that silt-heavy stretch of the Missouri
Been working a channel maintenance job near Sioux City for the past three weeks, and the silt was just murder on my 10-inch cutterhead dredge. Every other hour, I was shutting down to clear a partial blockage in the suction line, losing a ton of production time. I was about ready to pull my hair out. On a hunch, I started running the ladder a full foot higher than my usual depth setting for that material, and I bumped the swing speed way down, like to maybe 70% of normal. It felt wrong, like I wasn't being aggressive enough. But you know what? Letting the cutter just kiss the top layer and swing slow gave the pump a steady, manageable slurry instead of a dense slug of pure muck. Went a full 8-hour shift yesterday without a single clog. Has anyone else had to tweak their approach that much for super-fine sediment?
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webb.xena6mo ago
My buddy had the same issue and fixed it by adding a big water jet upstream of the pump intake.
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miles_roberts224mo ago
Huh, so you're saying the jet is a band-aid and the real fix is changing the cut? I get where you're coming from, but I actually think the jet can do more than just prevent settling. On fine silt like that, a well-placed jet can thin the slurry mid-line, buying you time to dial in the cut without losing production while you're figuring it out. I've seen it work as a temporary patch, at least.
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lucaslane6mo ago
That water jet trick can help, but it's more for preventing material from settling in the line during a shutdown. Your real fix was changing the cut. Running high and slow is the right call for that soup, because you're controlling the density at the source. A jet just tries to fix a problem you're already making.
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