The lead acetate corrosion test for pentane oil failed; how should this be adjusted?
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The lead acetate corrosion test for pentane oil failed; the temperature at the bottom of the debutane tower is nine degrees lower than before. Increasing the heat supply at the bottom of the tower allows reflux to occur, but the bottom temperature still doesn’t rise. Is it because the feed composition to the tower is too light, or is it water contamination in the feed that prevents the temperature at the bottom of the debutane tower from rising? What are the signs of water contamination in the feed to the debutane tower?
The failure in lead acetate corrosion resistance is mainly due to incomplete removal of hydrogen sulfide; it is likely caused by excessively low temperatures. However, the low temperature in the butane stripping tower cannot be increased – could this be related to water content in the feed? Or the component is too light, so the base temperature cannot be raised!
Yes, it should be related to the water in the feed stream; water is removed through venting at the bottom of the tower or the reboiler.