Metal Overpack Venting for Fire-Safe Polymeric IBCs
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Solution Overview
Problem
Polymeric intermediate bulk containers (IBCs) lack adequate fire safety and heat resistance, posing risks in chemical storage, while metal IBCs contaminate chemicals and are not suitable for high-purity applications.
Innovation Solution
A steel overpack surrounds a polymeric IBC, providing enhanced heat and pressure resistance with protected access ports and pressure release mechanisms, ensuring compatibility with stringent safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymeric IBC is used, then chemical resistance and noncontaminating nature are improved, but heat resistance and deformation resistance deteriorate
Solution Approach 1:
The polymeric IBC is nested within a metal overpack container, creating a composite structure where the inner polymeric container maintains chemical resistance while the outer metal container provides heat and deformation resistance, effectively resolving the contradiction between chemical compatibility and thermal stability
Solution Approach 2:
The system combines two different materials (polymer and metal) into a composite container system, where each material contributes its superior properties - the polymeric IBC provides chemical resistance and the metal overpack provides heat and deformation resistance, achieving both requirements simultaneously
2Temperature
If a metal IBC is used, then heat resistance and deformation resistance are improved, but chemical purity deteriorates due to contamination
Solution Approach 1:
The polymeric IBC is nested within the metal overpack, creating a barrier that prevents direct contact between the chemical and the metal container, thus maintaining chemical purity while benefiting from the metal's heat and deformation resistance
Solution Approach 2:
The polymeric IBC acts as an intermediary barrier between the chemical and the metal overpack, preventing direct interaction that would cause contamination while allowing the metal container to provide structural and thermal protection
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 solution combines the chemical resistance of polymeric IBCs with the robustness of metal overpacks, meeting safety standards and maintaining chemical purity.
Implementation Method 1
a fluid passage extending through the cylindrical side wall including a burst disk configured to release pressure above a predetermined pressure
Data Source
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AI summary
A fire-safe container includes a polymer polymeric IBC within a metal overpack. The metal overpack includes a manway surrounding a plurality of ports. Each port is on a projection form the polymeric IBC that extends into the manway through an aperture. A collar is disposed in each aperture between the projection of the polymeric IBC and the sides of the aperture such that the port is retained in the manway and preventing the port from contacting or collapsing through the aperture. The manway includes a burst disc to release pressure when there is pressure buildup. One of the ports can provide another burst disc to relieve pressure in the polymeric IBC. The polymeric IBC burst disc can release at a pressure that is greater than the pressure at which the manway burst disc releases.