How to remove naphthalene from washing oil?
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This post was last edited by jordan569 on 2013-1-6 at 23:24. In the chemical production area where I work, the wash oil in the crude benzene section contains high levels of naphthalene, which causes production difficulties and frequent blockages. How does everyone divide naphthalene? . Note $ # , $ $
The quality content of naphthalene in the washing oil should be less than 13%. What on earth are you talking about? ? In more detail,
Naphthalene has a relatively low freezing point, around 5 degrees, so it is likely to occur in low-temperature areas
Naphthalene vaporizes at 215 degrees. The current level of naphthalene in the oil being washed is high; with the existing technology in benzene removal towers, it’s difficult to remove naphthalene. At Tonggang Coking, by controlling the temperature at the top of the benzene removal tower at 105 degrees, the naphthalene content can be kept around 5%. In previous chemical processing methods, oil was used to wash away naphthalene, with the rich oil being used again for this purpose. Nowadays, both benzene and naphthalene are cleaned using benzene removal towers. If the tower gets clogged frequently, the solutions are: 1) Regularly clean the benzene removal tower using hot oil to prevent excessive crystallization of naphthalene from causing blockages; 2) Install a separate tower for washing naphthalene with oil before using the benzene removal tower – this is a permanent solution, but it requires some investment. By the way, what kind of packing do you use in your benzene removal tower? ? ?
The article I read said that Baosteel uses benzene absorption towers to remove naphthalene, with fairly good results. But I don’t know how they separated.
1. Ensure that the temperature at the outlet of the gas used for initial cooling does not exceed 23 degrees. 2 cycles of oil replacement and washing.