Question from October 26, 2017; replies can earn 0–6 points (no scoring for replies sent more than 1 day after posting. Thank you for your replies)
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This post was last edited by percy on 2017-10-26 at 17:42. Where are the areas of severe corrosion in the atmospheric and vacuum distillation units, and what anti-corrosion measures are in place?
Is it a atmospheric and vacuum distillation unit? The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation towers as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.
Initial corrosion under low-temperature H2S+HCl conditions, high-temperature corrosion at the bottom of the tower, etc
The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation towers as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.
The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation towers as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.
The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation towers as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.
Corrosion mainly occurs at the tops of the initial distillation tower, atmospheric pressure tower, and vacuum distillation tower, as well as in the low-temperature areas where liquid water is present, such as the air coolers and water coolers in the overhead condensation and cooling systems. Corrosion prevention measures: water injection, alkali injection, ammonia injection, corrosion inhibitor injection.
The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation towers as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.
The areas subject to severe corrosion during production are the top trays of the atmospheric and vacuum distillation columns as well as the top condensation system, the outlet of the vacuum furnace, and the oil transfer lines. For the pipelines at the bottom of the vacuum distillation tower and in the high-temperature residue system, as well as oil pumps, corrosion prevention measures include the use of a \"one removal and four injections\" process approach, and the use of corrosion-resistant steel for equipment and pipelines. However, even with these measures in place, complete protection against corrosion cannot be ensured; therefore, special attention is paid to inspecting these areas during production.