China Petroleum Chemical Corporation

Other

Research Institute of Petroleum Processing, Sinopec

Research Institute of Petroleum

Songnian Li

Xiaoxiang Zhong

Xieqing Wang

Weimin Lu

Jun Long

Jiushun Zhang

Jun He

Shuandi Hou

Kejia Xu

Xuefeng Wu

Zhanzhu Zhang

A downflow catalytic cracking reactor, comprising the following components: catalyst delivery pipe (), reactor top cover (), feed nozzle (), reactor vessel (), downflow reaction pipe (), the upper end of the outer body is close connected to top cover () along the direction of circumference; the bottom of the outer wall body is close connected to the outer wall of the downflow reaction pipe; the upper section of the downflow reaction pipe is located inside the reaction vessel, while the lower section extends from the bottom of the outer body; feed nozzle () is located on the top cover () and/or side wall of the reactor vessel () with the outlet of the feed nozzle being above the inlet of the downflow reaction pipe; catalyst delivery pipe () is fixedly joined to the reactor vessel and in communication with catalyst lifting zone () formed by the reaction vessel and the downflow reaction pipe.

Downflow catalytic cracking reactor and its application

A stripper and a stripping process for removing the flue gas carried by regenerated catalyst. A cylindrical stripper mainly comprises a degassing pipe at the longitudinal axis, a horizontal pipe connected with the lower end of the degassing pipe, several sets of inner annular baffles and outer annular baffles arranged in alternative arrangement along the vertical direction. Inner annular baffles are fixed on the degassing pipe, outer annular baffles are fixed on the inner wall of the cylinder. The degassing pipe has holes below each set of the inner annular baffles. The regenerated catalyst enters the stripper from the upper part, comes into a countercurrent and crosscurrent contact with steam from the annular steam conduit, and the stripped regenerated catalyst leaves the stripper from the bottom. The removed flue gas and the excessive steam enter the degassing pipe through the opening part of the degassing pipe under each set of inner annular baffles and leave the stripper from the top under the action of steam or air from the horizontal pipe. Using this stripper can minimize the amount of the flue gas carried by regenerated catalyst.

Stripper and a stripping process for removing the flue gas carried by regenerated catalyst

Growing community of inventors

Beijing, China

Songnian Li