Fluidized Solids Distributor for FCC Regenerator
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Solution Overview
Problem
Conventional side entry spent catalyst distribution systems in Fluid Catalytic Cracking Units (FCCUs) face issues with uneven distribution of spent catalyst within the regenerator and interference from air grids, which affect the efficiency of catalyst regeneration.
Innovation Solution
A solids distributor system comprising a solids standpipe, gas line, solids transfer line, and distributor, designed to promote even distribution of fluidized solids within a vessel by introducing a combined flow of solids and gas, avoiding internal obstructions and air grid interference, with a configuration that includes a solids standpipe, gas line, solids transfer line, and a distributor with center and arm conduits for efficient mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional side entry spent catalyst distribution system is used, then the system structure is simple, but the distribution of spent catalyst within the regenerator is uneven and air grid interference occurs
Solution Approach 1:
The distributor system is divided into multiple segments including a central conduit and multiple radial arms with distribution openings. This segmentation allows the spent catalyst to be distributed through multiple pathways simultaneously, achieving uniform distribution across the regenerator bed while maintaining a manageable system structure.
Solution Approach 2:
The distribution system transitions from a single-point side entry to a multi-dimensional radial distribution pattern. The central conduit extends vertically while radial arms extend horizontally in multiple directions, creating a three-dimensional distribution network that eliminates air grid interference and ensures uniform catalyst distribution throughout the regenerator.
2Productivity
If a conventional side entry distribution system is used, then the installation is straightforward, but air grid interference affects regeneration efficiency
Solution Approach 1:
The distributor system extends into the third dimension by incorporating both vertical (central conduit) and horizontal (radial arms) components. This multi-dimensional configuration allows the system to distribute catalyst above and around the air grid structure, eliminating interference while maintaining operational simplicity through a modular design that integrates seamlessly into the regenerator.
3Manufacturing precision
If spent catalyst is injected through a side entry port, then the injection process is simple, but even distribution within the regenerator cannot be achieved
Solution Approach 1:
The distributor is segmented into a central vertical conduit and multiple radial arms spaced at different angles. Each arm contains multiple distribution openings that discharge spent catalyst at specific locations. This segmentation transforms a single-point injection into a multi-point distribution system, achieving uniform catalyst distribution while keeping each individual component relatively simple.
Solution Approach 2:
Different sections of the distributor are designed with specific local characteristics. The central conduit handles bulk catalyst flow, while the radial arms distribute it radially outward. Each arm is positioned and oriented to deliver catalyst to specific zones within the regenerator, ensuring uniform distribution through localized optimization of each segment's function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves improved mixing efficiency and even distribution of spent catalyst within the regenerator, enhancing the regeneration process by avoiding air grid interference and ensuring complete utilization of the regenerator bed.
Implementation Method 1
a solids distributor comprising: a solids standpipe; a gas line; a solids transfer line in fluid communication with the solids standpipe and the gas line
Implementation Method 2
promote even distribution of spent catalyst within the regenerator by introducing a combined flow of solids and gas
Data Source
AI summary
A solids distributor (100) comprising: a solids standpipe (110); a gas line (120); a solids transfer line (130) in fluid communication with the solids standpipe (110) and the gas line (120); and a distributor (140) in fluid communication with the solids transfer line (130). A solids distributor system comprising the a vessel and the solids distributor (100) and a method of distributing fluidized solids.


