Is this method feasible?
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Due to the special conditions of the atmospheric and vacuum distillation units in our workshop, a portion of the residue oil is directly discharged from the bottom of the atmospheric tower. Both the reduced four-line oil and atmospheric residue oil are supplied to the catalytic unit. Reduce the base oil feed to the heavy oil catalytic unit. I don’t understand; since both the reduced four-oil fraction and the normal residue are subjected to catalysis, why does the distillation unit still need to separate them? If the outlet temperature of the vacuum furnace is appropriately reduced and the draw rate of the vacuum tower is lowered, will it have an impact on the subsequent units? The distillation unit can also reduce energy consumption to some extent. May I ask everyone, does lowering the temperature at the furnace outlet have an impact on the yield and quality of Lines 1, 2, and 3? Is the solution I mentioned for reducing the temperature at the furnace outlet feasible? If there are any issues, are there other methods or supplementary measures? This post was last edited by cswenhan on 2009-3-19 10:33]
Does the atmospheric and vacuum distillation unit owned by the poster have the problem of insufficient vacuum loading and heavy processing loads? Is the vacuum side-stream oil used as a base oil for further processing?
It is not feasible, as it affects the quality of the side-stream product and the vapor-liquid load on the tower.
The fact that the vacuum residue from the owner’s atmospheric and vacuum distillation unit is fed into catalytic processes indicates that the raw material is of good quality; therefore, it is likely that there are further processing steps on the vacuum side stream, such as using it to produce lubricant base oils. The extraction of heavy oil at atmospheric pressure is likely due to insufficient load on the vacuum furnace. As for reducing the furnace temperature, a comprehensive analysis is needed; if there is still headspace in the vacuum system, it’s possible to increase the vacuum level further, and then reducing the furnace temperature should not pose any problems. Otherwise, it will have a significant impact on the quality and yield of the first, second, and third production lines.
Our equipment has not been serviced for 5 years and is in its final stage of operation. Reduced side feeding catalysis and ortho-benzene.
Does a certain tower require a certain feed temperature? Isn’t the load of a 8,000-ton unit with 50% vaporization different from that of a 9,000-ton unit with 45% vaporization? What’s the difference?