Flow Reactor Coupler Gasket Shielding for Chemical Resistance
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Solution Overview
Problem
Gaskets in glass and ceramic flow reactors, especially at higher temperatures, have a shorter lifetime than desired due to chemical resistance issues and leakage concerns.
Innovation Solution
The use of upstream and downstream couplers with specific gasket grooves and posts configurations, where upstream couplers have a hollow circular cylindrical post and downstream couplers do not, along with plugs with solid circular cylindrical posts, to enhance gasket durability and chemical resistance, and a fluid conduit with couplers formed from chemical-resistant materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaskets are used to create leak-free fluid connections in flow reactors, then sealing reliability is improved, but gasket lifetime is reduced due to chemical degradation at higher temperatures
Solution Approach 1:
The patent extracts the gasket from direct contact with process reactants by positioning it in the coupler body away from the reaction zone. The gasket seals the interface between the coupler and reactor port but is shielded from harmful chemical exposure, thus maintaining sealing reliability while extending gasket lifetime by removing the degradation source.
Solution Approach 2:
The coupler body acts as an intermediary component between the process fluid and the gasket. It provides a protective barrier that allows the gasket to perform its sealing function while preventing direct exposure to chemically aggressive reactants, thereby resolving the contradiction between sealing effectiveness and chemical resistance.
2Ease of manufacture
If traditional gasket configurations are used in flow reactors, then assembly is simple, but chemical resistance and gasket durability are insufficient
Solution Approach 1:
The sealing system is segmented into distinct functional zones: the gasket handles sealing while the coupler body handles chemical exposure. This segmentation allows each component to be optimized for its specific function - the gasket for elasticity and sealing, the coupler for chemical resistance - thereby improving overall chemical resistance without complicating assembly.
Solution Approach 2:
Different parts of the system are given different material properties and functions. The gasket is positioned in a location with favorable local conditions (away from direct reactant contact) while the coupler body assumes the role of withstanding chemical exposure. This local quality differentiation improves chemical resistance while maintaining assembly simplicity.
Data Source
AI summary
A flow reactor [10] includes a fluidic module [20] having an external surface [22], an internal process fluid path [24], and an input port [I] and an output port [O] connected to the process fluid path [24]. An upstream coupler [30] is connected to the input port [I], and a downstream coupler [40] is connected to the output port [O]. The upstream coupler [30] has a gasket [38] in a gasket groove [36] pressed against the fluidic module [22] and a hollow circular cylindrical post [35] protruding from the upstream coupler [32] and extending into the input port [I]. The downstream coupler [40] has a gasket [48] in a gasket groove [46] pressed against the fluidic module [20] and no hollow circular cylindrical post extending into the output port [O].