How is the side-stream extraction volume from the atmospheric tower in a vacuum distillation unit determined?
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How is the side-stream extraction volume from the atmospheric tower in a vacuum distillation unit determined? For example, how much diesel, jet fuel, and gasoline can be extracted?
It mainly depends on the quality and type of oil products produced; accordingly, the distillation cuts vary. In other words, as you mentioned, the amount of oil extracted differs, and this is also determined by the properties of the crude oil
This is determined based on the yields of the fractions at various temperature ranges in crude oil evaluation.
Based on several factors: 1. The properties of crude oil, that is, the amount of fractions at various temperature ranges； 2. Requirements for product quality: for example, different cut points are required for the diesel, light chemical oil, and solvent oil produced in the side streams ； 3. Based on the vapor-liquid load of the tower, the vapor and liquid loads of the tower generally decrease after side-stream extraction; therefore, the design of the extraction rate is essentially a way to determine the average load across the entire tower. Appropriate extraction can optimize the tower’s diameter and reduce equipment costs.
Based on several factors: 1. The properties of crude oil, that is, the amount of fractions at various temperature ranges； 2. Requirements for product quality: for example, different cut points are required for the diesel, light chemical oil, and solvent oil produced in the side streams ； 3. Based on the vapor-liquid load of the tower, the vapor and liquid loads of the tower generally decrease after side-stream extraction; therefore, the design of the extraction rate is essentially a way to determine the average load across the entire tower. Appropriate extraction can optimize the tower’s diameter and reduce equipment costs.