What is the appropriate temperature control for the bottom temperature of the fractionation tower of the visbreaker unit?
Thread Content
If the bottom temperature of the fractionation tower of the visbreaking unit is controlled too high, >350 degrees, the light oil yield will increase, but the coking phenomenon at the bottom of the fractionation tower and the rear path will also increase, affecting the start-up cycle.； If the control is low, the effect is opposite. Is there a more general guideline for this temperature? How much temperature should be controlled at the bottom of the fractionation tower in your factory?
What kind of oil is your viscosity reducing device refining? Residual oil? There are very few viscosity reduction jobs in residual oil processing in China. I have done it before, but now it has been eliminated and there is a coking device. Therefore, it is difficult to have accurate guidelines for viscosity reduction. It may all depend on controlling the product and coking amount to control the parameters!
Viscosity reduction is to reduce the viscosity of fuel oil without paying attention to the light oil yield. The temperature is generally similar to the decompression temperature!
The person above seems to be joking. The starting point of everything in oil refining is efficiency. If there is no efficiency, nothing can be done. The benefit of viscosity reduction is to increase the liquid collection. When the liquid collection is increased, the efficiency is also increased, OK?
For viscosity reduction, the temperature of the reactor is generally controlled, and the temperature of the fractionating tower is rarely controlled. The liquid level of the fractionating tower is controlled, usually at about 15%.