The problem of initial distillation in atmospheric distillation of crude oil
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Russian crude oil is used as the raw material; due to its high content of light components, two-stage vaporization is required. What is the typical top temperature of a primary distillation tower?
The top temperature of the initial distillation tower is generally around 110°C; after passing through air cooling and heat exchangers, it can be reduced to 40–50°C, and then it enters the sulfur-containing wastewater system.
It depends on your process flow, the pressure at the top of the tower, and whether a product is produced or what that product is. However, the top temperature of the initial distillation tower is generally around 110°C. Setting up two-stage vaporization can transfer most of the corrosion to the top of the initial distillation tower, which is beneficial for corrosion prevention. In particular, Russian crude oil has a high content of light components, which helps to reduce the pressure drop in the crude oil heat exchange systems and atmospheric furnaces, thereby lowering the load on these furnaces.
The top temperature of the initial distillation column can be appropriately increased to 120, as the components are relatively light. Flashing these components out is beneficial for subsequent processing, as it reduces the load on the atmospheric pressure system and also decreases the need for anti-corrosion measures