Catalytic cracking fractionation heat exchange system
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The last edit to this post was made by Feilongzaiyou on 2018-7-27 at 20:53. Dear experts in the field, what measures were taken regarding the tower top oil and gas system and the top circulation heat exchanger during the catalytic distillation maintenance? How to protect it? During core extraction, spontaneous combustion of ferrous sulfide occurs from time to time!
Passivation can be carried out during the initial purging phase, or it can be done after the purging is complete
1. First, carry out passivation treatment. 2. Submerge the heat exchanger with water from the top of the three-phase separation tank. 3. Before construction, drain all the water and remove the core for inspection
Of course, it must be purged with steam before soaking to meet the standards
First, during the shutdown purging process, ensure that all areas are thoroughly cleaned so that no dead corners remain; if possible, use additives for passivation during shutdown. When removing the core, try to do so at a temperature that is suitable for such operations. If ferrous sulfide starts to burn spontaneously, immediately spray water to protect the equipment using a wet method
Can the passivation here be carried out during the initial purging? How is it implemented?
After stopping the steam purging, a passivator can be applied for passivation treatment. Generally, passivation treatment is carried out under the supervision and guidance of the manufacturer.
Generally, the top circulation system does not require treatment, unless your production process involves pressing acidic water into the top circulation system for discharge, in which case the top circulation system needs to be treated.
1 First, it must pass the steam purging test. 2 Perform passivation treatment. 3 Try to complete the core extraction work within 8 hours after stopping the gas supply. 4. When extracting the core, an acid water pump can be used to supply water for cooling as needed, and the outside area should be protected with high-pressure fire-fighting water.
The maintenance progress can’t be that fast; it takes 8 hours just to pull it out.