【Q&A Question 159】2016.09.26
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【Q&A Question 159】September 26, 2016: What is the impact of raw material changes on the temperature in the refining reactor? The answer key will be available after responding; scoring is based on addressing the key points. High levels of sulfur and nitrogen in the raw materials, along with high bed temperature ； The recycled hydrogen has high purity and high temperature ； Large feed rate, temperature drop ； The raw material is moist; temperature drops or fluctuates ； High raw material weight, temperature drops.
An increase in impurity content leads to an increase in reaction temperature. An increase in the olefin content also results in an increase in reaction temperature. A heavier raw material leads to an increase in reaction temperature
The temperature decreases, and the extent of this decrease varies across different reaction stages
Impurities in the raw materials, such as olefins and aromatics, can increase the temperature rise; failure to adjust the amount used in a timely manner can also lead to an increase in temperature!
A large portion of the heat in the reactor temperature comes from the exothermic reaction; when the properties of the feedstock are good, the reaction heat is reduced, resulting in a lower temperature rise in the reaction bed. Conversely, if the properties of the feedstock are poor, the reaction heat is higher, leading to an increased temperature rise in the reaction bed
Changes in the composition of the feed oil lead to changes in the reaction conversion rate, and the reactor temperature is generally in a linear relationship with this conversion rate
1. Changes in the refining temperature: if the nitrogen content of the raw material decreases, both the inlet temperature and the outlet temperature drop. 2. Changes in cracking temperature rise: if the N content decreases, the cracking temperature rise also decreases. 3. Changes in pressure drop. 4. Changes in hydrogen consumption 5. Impact on the composition of recycled hydrogen.
With light oil and a high olefin content, the bed temperature will rise
The refining reaction is usually an exothermic reaction; when the content of olefins, sulfur, nitrogen, and oxygen in the feedstock is high, the reaction temperature increases