Oil sludge from an oil storage tank was treated using
a combined
ultrasound and thermochemical cleaning method. The effects of cleaning
temperature, cleaning time, ultrasound frequency, ultrasound power,
and other factors on the oil recovery were investigated. Experiments
on the screening and remixing of reagents were conducted and indicated
that the best constituents of detergent solution were sodium silicate,
sodium dodecyl benzene sulfonate, and fatty alcohol ethoxylates in
a ratio of 1:1:1. The optimum conditions of the combined treatment
system were also determined. The results showed that, under the optimum
conditions, the oil content of oil sludge dropped from 43.13% to 1.01%,
0.53% of solids remained in the separated oil layer, and 99.32% oil
recovery could be achieved when the concentration of detergent solution
was to 2 g/L. Compared with traditional thermochemical cleaning, the
oil recovery was 17.65% higher for the combined treatment system.
Abstract-In this paper, three algorithms are applied to extract the wind direction using a month HFSWR data in an experiment with a single radar system. The preliminary results show that the three algorithms can all eliminate the ambiguity of the wind direction. And the RMS error (RMSE) obtained by the angle comparison multi-beam (ACMB) algorithm is 24.80°, which is better than the others. We can obtain that the ACMB algorithm is best available for extracting wind direction using the data obtained by this experiment. However, for the other data with different conditions, whether this algorithm is the best needs further examination.
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