Problems in continuous distillation of two columns
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Continuous negative-pressure distillation of the two columns separates the light components, the main component, and the heavy components. Feed is transferred from Tower 1 to Tower 2; tests show that the content of light components in it is within acceptable limits. However, tests on the product in Tower 2 reveal that its light component content is relatively high. Feed is transferred from one tower to the other, with the second tower continuously discharging material, in an attempt to dilute the light components within it, but this has little effect. What is the cause of this problem? How can the problem of excessive light component content in the finished product be solved? Thank you
Also, during the previous shutdown, the contents inside the towers were not emptied; when vacuuming, the two towers were evacuated using the same vacuum pump
Is the material undergoing thermal decomposition in the second tower?