带密相环流预汽提器的快分系统，特有的预汽提器将粗旋料腿由原来的正压差排

The fast separation system with dense-phase circulating pre-stripper. The special pre-stripper changes the coarse spinning leg from the original positive pressure differential discharge to the negative pressure differential discharge, which basically eliminates the downward back mixing of oil and gas, so The gas-solid separation efficiency is increased to more than 99%. The density difference between the inner and outer rings is adjusted by changing the amount of stripping steam in the inner and outer rings of the pre-stripper, so that the catalyst forms a dense-phase ring flow between the inner and outer rings, while achieving the purpose of low steam consumption and high stripping efficiency. The draft tube can quickly lead out the gas, reducing the oil and gas residence time to less than 5s. CSC fast separation can effectively shorten the residence time of the reacted oil and gas in the settler, reduce the occurrence of secondary cracking reactions, and improve the efficiency of catalyst stripping.

With the fast separation system of the dense phase circulation pre-vapor picker, the unique pre-steam lifter changes the coarse rotating leg from the original positive pressure differential discharge to the negative pressure differential discharge, basically eliminating the oil and gas down-mixing, so that the gas solid separation efficiency is increased to more than 99%. By changing the amount of steam lifting steam in the inner and outer rings of the pre-steam lifter to adjust the density difference of the inner and outer rings, the catalyst forms a dense phase ring flow between the inner and outer rings, and achieves the goal of low steam usage and high lift efficiency. The conduit quickly leads the gas out, reducing the oil and gas dwell time to less than 5s. CSC fast division can effectively shorten the time of residence of reactive oil and gas in the settler, reduce the occurrence of secondary cracking reaction, and improve the efficiency of catalyst lifting.

In the fast separation system with dense phase circulating pre stripper, the special pre stripper changes the discharge of coarse rotary feed leg from positive pressure difference to negative pressure difference, basically eliminates the downward backmixing of oil and gas, and improves the gas-solid separation efficiency to more than 99%. The density difference between the inner and outer rings is adjusted by changing the amount of stripping steam in the inner and outer rings of the pre stripper, so that the dense phase flow of catalyst is formed between the inner and outer rings, and the purpose of low steam consumption and high stripping efficiency is realized. The flow guide tube can quickly lead out the gas and reduce the residence time of oil and gas to less than 5S. CSC fast separation can effectively shorten the residence time of reaction oil and gas in the settler, reduce the occurrence of secondary cracking reaction, and improve the stripping efficiency of catalyst.<br>