Is the higher the feed temperature of the desorption tower at the stable position of the catalytic unit, the better? What degree is most suitable?
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Is the higher the feed temperature of the desorption tower at the stable position of the catalytic unit, the better? What degree is most suitable?
The feed temperature of the desorption tower is definitely not as high as possible. If the tower top temperature is high, the C3 content in the dry gas will also be high. There are two types of feeds for the desorption tower: cold feed and hot feed.
The higher the temperature is definitely not good, otherwise the stabilizing tower feed will not be designed with three feeds. The degree of feeding is the same as which feed is used. It is mainly based on the quality of the product. The temperature value is not fixed. As for the stabilizing tower feed, it is generally not much different from the heat exchange with stabilizing tower gasoline. This value is generally not adjusted. If the temperature is high or low, only the feed route or the process parameters of the stabilizing tower are adjusted.~~~
There is no higher process parameters, only appropriate ones. If the temperature is too high, it will over-resolve. First, it will increase the absorption load. Second, it will cause the liquefied gas loss and yield to decrease. We generally control it at around 120.
Everything must be reversed and everything must have a degree. Although high temperature and low pressure are conducive to desorption, why is the pressure of the desorption tower higher than that of the absorption tower? The same is true for temperature. Although high temperature is conducive to desorption, it depends on the process conditions. Desorption cannot be unlimited and must be based on the composition and dryness of the desorbed gas. The amount of C3 in the gas is used to determine the desorption effect. Over-desorption is not allowed. As for the feed temperature of the desorption tower, each device may be different. Currently, many devices are designed with two feed inlets. Later, they were changed to hot and cold feeds so that the operation is more flexible and stable.
The temperature must not be as high as possible, otherwise why design cold feed and hot feed? It is about 40 degrees
Support the 7th floor’s point of view: loveliness:
The feed to the desorption tower is generally at the top of the tower. If the temperature is high, it is easy to escape directly from the top of the tower. If there is too much desorbed gas, the desorbed gas may be over-desorbed and sent to the balance tank, and then fed to the desorption tower. Repeating this cycle increases the processing load. So it’s better to have a proper temperature
We control it at around 160 degrees. This mainly depends on the nature of your raw materials and your tower design capabilities.