The role of MGD gasoline in the pre-lifting section of the MGD process
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The device adopts MGD process, and MGD gasoline is used in three places in the riser pipe.: Pre-lifting section, below the wax residue oil mixing feed nozzle and on the wax residue oil mixing feed nozzle. The MGD gasoline above and below the wax residue oil mixing feed nozzle is a reactant in the gasoline reaction zone and can generate a certain amount of liquid hydrocarbons, which is beneficial to the cracking of heavy oil. It reduces the olefin content of gasoline while increasing diesel and liquid hydrocarbons and increasing the octane number of gasoline. The pre-lift section uses low-pressure steam, dry gas and MGD gasoline. What is the role of MGD gasoline?
It is generally of experimental nature. The reaction time of gasoline in this part is longer and more liquid hydrocarbons can be produced.
The main purpose is to reduce the gasoline yield, produce more liquid hydrocarbons, and increase the propylene yield. The four main targets are petrochemical enterprises with large propylene processing capacity.
In the original sense, MGD is to inject gasoline at this location. This technology of Shiji Academy was produced in the environment of vigorously increasing the diesel-gasoline ratio and producing more liquefied gas. The gasoline enters the riser at this position, where the catalyst temperature is the highest and the catalyst-to-oil ratio is the largest, causing the gasoline to crack into liquefied gas, and of course some of it becomes dry gas. ； At the same time, when the catalyst comes into contact with the catalytic raw material, its temperature and activity are not as good as the newly regenerated regenerant, so the conversion rate will be lower and there will be more diesel. The gasoline is more cracked and the diesel is more, so the diesel-gasoline ratio naturally increases. However, I think that it is not a good idea to put the gasoline produced by the catalytic process into the riser for cracking. I can only say that it is a solution!