Arrangement method of catalytic cracking tetra-cyclone separator

Abstract

The invention discloses an arrangement method of a catalytic cracking tetra-cyclone separator (referred to as a tetra-cyclone). The tetra-cyclone separator system mainly comprises a tertiary cyclone discharge pipe, a material storage tank, a tetra-cyclone gas inlet pipe and a tetra-cyclone. A dilute phase space at the upper part of the material storage tank is provided with a vertical partition plate. The vertical partition plate divides the dilute phase space of the material storage tank into an inertial separation zone and a sedimentation separation zone. Dust-containing flue gas in the tertiary cyclone discharge pipe is introduced from the top of the inertial separation zone, passes through the inertial separation zone and the sedimentation separation zone and then enters the tetra-cyclone through the tetra-cyclone gas inlet pipe at the top of the sedimentation separation zone. Gas subjected to dedusting in the tetra-cyclone enters a downstream critical nozzle. Solid particles separated by the tetra-cyclone enter a bottom material layer of the material storage tank along a dipleg. The inertial separation zone realizes gas and solid separation through difference of gas and solid particles. The sedimentation separation zone realizes gas-solid separation by a lower section gas velocity. Through the above two kinds of particle pre-separation measures, a particle concentration at the inlet of the tetra-cyclone and separation load are reduced. A gas-locking device is arranged at a tetra-cyclone dipleg particle outlet so that backflow of gas in the dipleg is prevented and smooth delivery of particles in the dipleg is guaranteed.

Description

technical field [0001] The invention relates to an arrangement mode of a fourth-stage cyclone separator for catalytic cracking, and belongs to the technical field of petrochemical industry. Background technique [0002] In the catalytic cracking unit of the refinery, the third-stage cyclone separator (hereinafter referred to as the three-cyclone) is an important equipment for the separation and recovery of high-temperature flue gas catalyst particles in the regenerator, and it is also to ensure the long-term operation of the smoke machine and avoid the erosion and wear of the catalyst particles. The key equipment of the blade. In the three-rotation system, in order to make it have a higher particle collection efficiency, a critical nozzle is often provided to control a small amount of flue gas (3-5%) to be drawn from the three-rotation ash hopper, and the fine particles separated by the three-rotation The particulate catalyst enters the storage tank together with this part ...

AI Technical Summary

Problems solved by technology

This improved structure solves the problem of gas blow-by of the quadrotor to a certain extent, but there are still problems such as the high concentration of particles at the inlet of the quadrotor and the insufficient utilization of the sedimentation and separation function of the dilute phase space in the storage tank, which increases the capacity of the quadrotor. Workload

Images