How is the preheating temperature for catalytic cracking feedstock determined?
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How is the preheating temperature for catalytic cracking feedstock determined?
The higher, the better, right? To reduce the load on the heating furnace. . .
Reply 1# Little Finger’s Pact: No charring. Good atomization 240_320
The setting of the raw material preheating temperature is the result of various factors such as the atomization effect, oil-to-agent ratio, reaction temperature, and the efficient utilization of high-quality thermal energy. Generally, the higher the preheating temperature, the better the atomization effect; however, an excessively high temperature can cause coking in the nozzle lines, lead to tendencies toward thermal cracking, increase the consumption of oil slurry and gas, reduce the amount of steam produced (depending on the process heat exchange setup), and also raise the reaction temperature and decrease the oil-to-agent ratio, thereby affecting the quality of the product
The preheating temperature has a significant impact on the atomization effect of the raw materials, and it also affects the yield and quality of the product. A high preheating temperature reduces the viscosity of the raw materials, thereby improving the atomization effect and reducing the formation of coke. However, if the temperature is too high, it affects the thermal balance, leading to a decrease in the oil-to-agent ratio, a drop in conversion rate, and an improved distribution of the product. The temperature is generally maintained between 180 and 220℃
The preheating temperature of the raw materials is primarily intended to ensure good atomization of the materials, and sometimes it is also used as a means to regulate the reaction process. It should not be too high
It depends on the feed nozzle for residue catalytic cracking.
Generally, the higher, the better. A higher temperature reduces the viscosity of the raw materials, which facilitates atomization; in our factory, the temperature is always above 240 degrees