In heavy oil catalytic cracking, how are the amounts of pre-raising steam, stripping steam, atomizing steam, and protection steam calculated?
Thread Content
How do you usually quantify it?
The amount of vapor generated through atomization varies depending on the nozzle design; it is approximately 5 percent of the feed volume, with different nozzles having different values
Well, there’s the pre-heating steam, and then there’s the stripping steam
The amount of stripping steam is primarily used to remove oil and gas from within the catalyst pores; the design specifications for the process unit should provide this information. During normal operation, the amount of stripping steam can be adjusted based on the temperature of the regenerator, while monitoring changes in the bed temperature The pre-heating steam is mainly used to heat the catalyst, and it is related to the line speed; specifically, it depends on your required line speed!
Pre-lifting is also related to the nozzle model, right? These aspects are probably determined jointly by the design institute and the nozzle manufacturers