Riser Segmentation for Particulate Solid Regeneration
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Solution Overview
Problem
Existing regenerator systems for particulate solids in chemical processing face challenges with flow efficiency due to the design of the riser and particulate solid separation section, leading to suboptimal flow characteristics and reduced activity of particulate solids.
Innovation Solution
The method involves regenerating particulate solids by oxidizing them with an oxygen-containing gas or combusting coke, using a riser that extends through a sidewall port of the particulate solid separation section, allowing for improved flow by positioning the riser segments within and outside the section, and separating solids from gases before passing them to a collection area centered on the vertical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the riser extends through the bottom of the particulate solid separation section, then the regeneration process can be implemented, but the flow of particulate solids is negatively impacted and an annular space is created where outlet cannot be centered
Solution Approach 1:
The riser is divided into two distinct segments: an interior riser segment positioned inside the outer shell and an exterior riser segment positioned outside the outer shell. This segmentation allows the riser to extend through the sidewall rather than the bottom, eliminating the annular space problem while maintaining regeneration functionality.
Solution Approach 2:
Instead of extending the riser vertically through the bottom of the separation section, the invention positions the riser port on the sidewall and extends the riser horizontally through the wall thickness. This dimensional change allows the particulate solid outlet to be centered at the bottom while the riser maintains its structural integrity.
2Device complexity
If the riser enters through the bottom of the particulate solid separation section, then structural simplicity is maintained, but the flow characteristics of particulate solids are degraded
Solution Approach 1:
The riser is segmented into interior and exterior portions that are positioned in different locations (inside and outside the outer shell respectively). This segmentation enables the riser to enter through the sidewall rather than the bottom, improving flow characteristics while maintaining reasonable structural complexity.
Solution Approach 2:
The outer shell acts as an intermediary structure that the riser penetrates through its sidewall. This allows the riser to maintain its function while the shell provides the structural framework, enabling centered outlet positioning at the bottom without compromising riser integrity.
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
This approach enhances the flow characteristics and activity of particulate solids, leading to more consistent treatment and increased efficiency in chemical processing, particularly in producing light olefins.
Implementation Method 1
oxidizing the particulate solid by contact with an oxygen-containing gas
Implementation Method 2
combusting coke present on the particulate solid
Implementation Method 3
combusting a supplemental fuel to heat the particulate solid
Data Source
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AI summary
According to one or more embodiments, particulate solids may be regenerated in a particulate solid treatment vessel. The particulate solid treatment vessel may be connected to a riser. The riser may extend through a riser port of an outer shell of a particulate solid separation section such that the riser may comprise an interior riser segment and an exterior riser segment. The particulate solid separation section may include a gas outlet port, a riser port, and a particulate solid outlet port. The particulate solid separation section may house a gas/solids separation device and a particulate solid collection area. The riser port may be positioned on a sidewall of the outer shell such that it is not located on a central vertical axis of the particulate solid separation section. The particulate solids may be separated from gasses in the particulate solid separation section.