Will dew point corrosion occur at the top of a dry vacuum distillation column?
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In dry vacuum distillation, no steam is injected – will dew point corrosion occur? Is it necessary to calculate the dew point temperature? I would appreciate it if experts could offer some guidance
Yes, acidic substances will also rise along with the light components into the gas phase line
So is the dew point generated at the top of the tower? Without steam injection, no water will be present at the top of the tower. Is it still dew point corrosion that occurs after the vapor is evacuated and then mixed with steam?
Take samples and analyze the composition of the degassed gas; it is estimated that the high-boiling-point oxygen-containing compounds in the vacuum furnace (such as phenols, ethers, naphthenic acids, etc.) will also release a small amount of water, and these substances, along with the decomposition products of sulfur-, phosphorus-, and halogen-containing compounds, will create a corrosive environment.
There will also be ones at the top of the tower, mainly at the after-cooler and air-cooling areas