Research on the Effect of Reducing Phosphorus Content in High Temperature Corrosion Inhibitors
The processing capacity of a certain petrochemical atmospheric and vacuum distillation unit is 6.0 Mt/a,mainly processing low sulfur heavy intermediate base crude oil.The straight run wax oil produced is used as raw material for the wax oil hydrogenation unit.At present,the anti-corrosion measures for the high-temperature parts of the device include injecting a certain amount of high phosphorus high-temperature corrosion inhibitor(with a phosphorus content of about 2％)into the first,second,and reflux areas in the washing section,achieving good process anti-corrosion effects.Recently,it has been discovered in production that the raw material filter of the wax oil hydrogenation unit is frequently backwashed,and there are problems such as rapid pressure drop increase and severe scaling in the heat exchanger and reactor.Sampling and analysis of the scaling substances have found that they contain phosphides.It is suspected that this may be related to the injection of high phosphorus agents into the oil by the atmospheric and vacuum distillation unit.To this end,a special activity project titled"Application of Low Phosphorus High Temperature Corrosion Inhibitors"will be launched,aiming to ensure the high-temperature anti-corrosion effect of atmospheric and vacuum distillation units and improve the production problems of downstream units under the premise of using low phosphorus high temperature corrosion inhibitors.
high-temperature partsanti-corrosionhigh temperature corrosion inhibitorslow phosphorus
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