Difference between the reflux extraction temperature and the refeeding temperature in each section of the catalytic unit’s distillation column
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What is the temperature difference between the reflux extraction and the temperature at which the liquid returns to the tower in each section of your catalytic unit’s distillation column? What should be an appropriate value for this difference? In my unit, the temperature for extracting the slurry is 340 degrees, while the temperature at which the slurry returns to the tower is 250 degrees; thus the difference is 90 degrees. For the intermediate stage, the extraction temperature is 235 degrees, and the temperature at which the slurry returns to the tower there is 190 degrees, giving a difference of 45 degrees. In the top circulation stage, the extraction temperature is 130 degrees, and the temperature at which the slurry returns to the tower there is 100 degrees, resulting in a difference of 30 degrees
Our extraction is 355, downward reverse tower is 275, first stage extraction is 310, top circulation extraction is 110
There are no strict numerical limits for this extraction and return to the tower temperature; the main concern is to ensure that the temperature of the material returning from the top circulation is not too low, in order to prevent salt formation. The low return temperature increases the gas-liquid phase load during extraction to the return stream, affects the heat load, and impacts the distillation accuracy. Personal opinion
All returned temperatures should be guided by quality criteria
It is more reasonable to put it this way: make the best use of this thermal energy while ensuring quality. If quality isn’t guaranteed, it’s like the big fish dragging eggs along. ;P
Why is the temperature drawn from Unit 1 so high? What is the temperature returning to the tower?
How does the heat exchange process work in your Fractionation Unit 1? We use it as a heat source for the reboiler at the bottom of the stabilizer; after that, the heat is sent through a steam generator before being returned to the fractionation tower
We only use heat sources for the stripping tower and the stabilizer bottom, with very little heat being exchanged with hot water
These are only approximate values; they also depend on the type of catalytic reaction, the volume of material processed, as well as the heat distribution of the product. . . . . . Come and take a look.
What do 190°C and 100°C refer to for the second and third rows of slurry returning to the tower? Should it be returning to the tower from No. 1 Middle School, and returning to the tower from the top row?