What are the uses and dosage of scale inhibitors and corrosion inhibitors in diesel hydrogenation units?
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What are the purposes of adding scale inhibitors and corrosion inhibitors to diesel hydrogenation units, and how should the amounts added be determined?
Corrosion inhibitors are required in diesel hydrogenation units to prevent corrosion by hydrogen sulfide at the top of the distillation tower, with the addition amount being 0% of the flow rate. 2PPm。 As for adding scale inhibitors, I haven’t encountered that situation, so it’s hard for me to answer you.
Corrosion inhibitors are used to prevent corrosion at the top of the distillation tower, while scale inhibitors are added when the raw material buffer tank is emptied to prevent blockages in the heat exchangers
Scale inhibitors: As the production cycle lengthens, a layer of scale tends to form on the inner walls of the heat exchanger tubes used for handling crude oil/reaction products. The main components of this scale are polycyclic aromatic hydrocarbons, which are insoluble in water, oils, acids, alkalis, and other solutions, thereby affecting operation over extended periods of time. To address this issue, a scale inhibitor is injected before the heat exchanger in production; it forms a protective layer on the inner wall of the air-cooled tube bundle. It is usually added at the inlet of the reaction feed pump to prevent scaling, and practice has shown that by using this scale inhibitor, the heat exchange efficiency can be maintained at a good level. Retardant: The H2S levels at the top of the stripping tower and the butane removal tower are relatively high; to protect these tower tops, a corrosion inhibitor is injected into the pipelines at the top of the towers to reduce the corrosive effect of H2S.
Did the product show excessive levels of sulfur and nitrogen after adding a corrosion inhibitor?