Composite Flow Reactor Plug for Chemical and Thermal Sealing
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Solution Overview
Problem
Flow reactors with glass or ceramic modules face challenges in using fluid fittings made of hard glass or ceramic materials due to scratching or chipping, and existing plugs lack sufficient thermal and chemical resistance, making them unsuitable for highly reactive chemical processes and high temperatures.
Innovation Solution
A plug design featuring a metal guide with a chemically resistant polymer face and a thermally resistant polymer side and face, including a hollow cylinder structure with a screw closure, to provide durability and resistance while preventing damage to glass or ceramic surfaces, using materials like PTFE and PEEK for enhanced chemical and thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hard glass or ceramic materials are used for fluid fittings including plugs, then thermal and chemical resistance is improved, but the materials are damaged by scratching or chipping including by mutual contact
Solution Approach 1:
The plug is constructed as a composite assembly combining a metal guide (providing mechanical strength and scratch resistance), a chemically resistant polymer plug body (providing chemical resistance), and a thermally resistant polymer coating (providing thermal resistance). This composite structure resolves the contradiction by distributing the functional requirements across different materials, allowing the plug to achieve high thermal and chemical resistance without sacrificing resistance to scratching or chipping.
2Adaptability or versatility
If removable plugs are used for modular and reconfigurable flow reactors, then adaptability is improved, but the plugs must not damage glass, ceramic, or glass-ceramic surfaces
Solution Approach 1:
The plug body is made of chemically resistant polymer material that is inherently softer and more compliant than hard glass or ceramic materials. This local material property ensures that when the plug contacts the reactor surfaces, it does not cause scratching or chipping damage. The metal guide provides structural support while the polymer plug body and coating provide the non-damaging contact surfaces, enabling removable plugs to be used in modular reactors without harming the reactor surfaces.
3Reliability
If a plug body is made entirely of chemically resistant polymer, then chemical resistance is improved, but thermal resistance is insufficient for high process or reaction temperatures
Solution Approach 1:
The plug employs a composite material structure where the plug body is made of chemically resistant polymer material, and the exterior surface is coated with thermally resistant polymer material. This composite construction allows the plug to simultaneously achieve both chemical resistance (from the polymer plug body) and thermal resistance (from the thermal coating), resolving the contradiction for use in high temperature chemical processes.
Data Source
AI summary
A plug (10) for plugging a port (P) in a flow reactor comprises a metal guide (12) having first and second ends (14,16) and a wall (18) surrounding a cylindrical interior volume (20) having an opening (22) at the first end (14); a plug body (40) having a first face (42) and an opposing second face (44) and a side surface (46) and positioned partially within the interior volume (20) with the first face (42) protruding from the opening (22); wherein the plug body (40) comprises a chemically resistant first polymer constituting at least the first face (42) and a thermally resistant second polymer constituting at least the second face (44) and at least a portion of the side surface (46).