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The normal pressure tower is a composite tower, which is divided into gasoline, kerosene, light diesel oil, heavy diesel oil and heavy oil. According to the general method of multiple rectification, it is necessary to have n-1 distillation column to divide the raw material into n fractions. However, the oil pressure rectification tower is on the side of the tower if it is on the side of the side to get the fraction of the products mentioned above, like the n towers are together, so it is called a composite tower.
The vacuum equipment of the vacuum tower is commonly used in steam ejector (also called steam injector pump) or mechanical vacuum pump. The mechanical vacuum pump is only used in some dry vacuum distillation tower and the vacuum tower of small oil refinery, and the steam injector is widely used. [1]
distinction
1. The shape of the regular vacuum tower in the process of processing crude oil is different: the shape of the normal pressure tower is a cylindrical container with the same diameter and diameter. The shape of the vacuum distillation tower are reducing cylindrical container is up and down the end, the reason is that the upper phase load is small, the bottom need to bottom residue, fast heat residue for coking reaction for a long time.
2. The sealing performance requirement is different.
Use different conditions.
4. The feeding mode is different. It's different.
5. There is a different way of discharging the tower.
There are differences in tower structure and packing process.
The main difference lies in the way of operation and the difference in application.
The decompression operation is beneficial to protect the material, reduce the boiling point of the pig manure and reduce the energy consumption.