Compression Baffle Ring for High-Pressure Reactor Mixing
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Solution Overview
Problem
Internal baffles in chemical reactors used for mixing are unsuitable for high-pressure processes like LDPE, as attachment methods weaken the reactor's ability to withstand pressure, leading to potential failure due to crack initiation and propagation.
Innovation Solution
A baffle system for cylindrical reactors, featuring a ring with an exterior and interior surface and vertical baffles extending from the interior surface, which is designed to be continuous or discontinuous and attached using compression or interference fit methods, reducing the need for mechanical fasteners that can cause cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If internal baffles are attached to the reactor using ports or bolt holes, then mixing is improved, but the reactor's ability to withstand high pressure is weakened due to crack initiation points
Solution Approach 1:
The patent removes the harmful attachment features (ports, bolt holes, welding) from the baffle system design. Instead of attaching baffles through these methods, the invention uses a compression ring that applies radial force to hold baffles in place without creating stress concentration points in the reactor wall, thereby eliminating crack initiation sites while maintaining mixing functionality
Solution Approach 2:
The patent introduces a compression ring as an intermediary component between the baffles and the reactor wall. This compression ring transfers the holding force to the reactor wall in a distributed manner through radial compression rather than through localized attachment points, preventing stress concentration and crack propagation while still securing the baffles for effective mixing
2Productivity
If internal baffles are welded to the reactor, then mixing is improved, but the integrity of the reactor metal is degraded making it more prone to crack initiation and propagation
Solution Approach 1:
The patent eliminates welding as an attachment method for the baffle system. The compression ring design holds baffles in place through radial compression forces distributed around the reactor circumference, completely removing the need for welding operations that would otherwise create heat-affected zones and weaken the reactor metal structure
Solution Approach 2:
The patent replaces the welding process (thermal/mechanical joining) with a compression-based mechanical holding system. The compression ring applies distributed radial forces to secure baffles without thermal input, avoiding the degradation of metal integrity that occurs during welding while still achieving the desired mixing performance
Data Source
AI summary
Systems and methods for improved mixing, including baffle systems, reactor systems, and methods of using the same are provided herein. These baffle systems include a ring having an exterior surface defining an outer diameter and an outer circumference, an interior surface defining an inner diameter and an inner circumference, a top surface, a bottom surface, and an axis; and one or more substantially vertical baffles extending from the interior surface of the ring toward the axis.