Selection Of Heat Exchanger In Oil Continuous Refining Process

1 The role of heat exchanger in oil refining

In the process of oil processing, in order to meet the operation requirements of different sections, the oil product needs to ensure a certain temperature. For example, the raw oil needs to be preheated, and the finished oil needs to be cooled, and some need to be kept warm to meet the operating parameters of the production process. Often in this case, the heat exchanger, as a heat exchange device, plays an extremely important role, directly affecting and related to the smooth progress of various reactions in the process.

2 Selection of heat exchanger

There are many types of heat exchangers with different characteristics. Generally, they should be selected according to the requirements of the production process. Common heat exchangers include shell and tube heat exchangers, spiral plate heat exchangers, and plate heat exchangers; in addition, there are some new heat exchangers such as plate-shell, plate-fin and fin-tube heat exchangers.

Usually in the continuous refining of oil, we need to make reasonable selection of heat exchangers. Because the Shell And Tube Heat Exchanger occupies a large area, it is suitable for large-scale heat exchange equipment, and it is mostly used as a heat exchanger for heating or cooling, a still (or reboiler) and a condenser in the operation of the steamer, so it is used in the refining section , except for the atmospheric condenser connected to the steam jet pump used for vacuuming, it belongs to the category of shell and tube heat exchangers, and shell and tube heat exchangers are rarely used. In particular, it should be pointed out that in the solvent recovery part of the leaching section, the tube heat exchanger is mainly used as the condenser.

The oil to be deodorized and the deodorized oil entering and exiting the deodorization tower have a temperature of 140°C and 251°C, so it is advisable to use a Spiral Plate Heat Exchanger with high temperature resistance and high heat transfer coefficient. Spiral plate heat exchanger.

In other places where crude oil heat exchange, decolorized oil heat exchange, etc. are used, plate heat exchangers are mainly used. The reason is not only because of the advantages of compact structure, small footprint, convenient maintenance, cleaning, and adjustment, but the most important thing is that the heat transfer area provided by the unit volume of the equipment is large, and the total heat transfer coefficient is high. Therefore, under the condition of constant heat, the area required for the heat exchanger is relatively small, making the investment more economical. Similarly, when the Plate Heat Exchanger has the same heat exchange area as other heat exchangers (such as tube and tube heat exchangers), it will transfer more heat.