Controlled Tests of Eductors and Submersible Pumps
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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An eductor developed under the Dredging Research Program a commercial eductor with similar hydraulics, and two commercial submersible pumps were tested in clean sand and a variety of debris types to measure performance. A total of 61 tests were run. The two eductors had similar performance in clean sand. In rock and garbage bagswim fin debris, the DRP eductor had higher production. In wood debris, the commercial eductor performed better. The Toyo Submersible Pump had the highest production of any unit tested, while the HH pump had the lowest production. Both submersible pumps were susceptible to plugging of the discharge line. They required nearly constant operator adjustment to provide good production without plugging the discharge line. The eductors required much less operator adjustment and did not plug the discharge line. Pullout forces on the shrouded DRP eductor stayed low, less than 20,000 lb, when the unit was backflushed for a sufficient period to allow excess water to lubricate the entire outer surface of the eductor. Debris, Sand bypassing, Eductors, Submersible pumps, Jet pumps.
- Pumps, Filters, Pipes, Tubing, Fittings and Valves