Double-Containment Chemical Injection Lance for Leak Control
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Solution Overview
Problem
Chemical injection systems lack effective containment mechanisms for preventing leaks during the injection of corrosive or hazardous chemicals into process streams, posing safety and environmental risks.
Innovation Solution
A double containment chemical injection system is designed, featuring a pump box and injection assembly with inner and outer conduits that surround the chemical flow, providing a secondary containment mechanism to manage potential leaks and ensure safety and environmental protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional chemical injection system is used, then the system structure is simple, but chemical leaks cannot be prevented during injection
Solution Approach 1:
The patent implements double containment by nesting an inner conduit within an outer conduit. The inner conduit carries the chemical flow while the outer conduit provides a secondary containment barrier. This nested structure prevents chemical leaks by containing them within the inner conduit while providing an outer barrier to catch any potential leaks, thus improving reliability without excessive complexity.
Solution Approach 2:
The injection system is segmented into distinct containment zones: the inner conduit for primary chemical transport and the outer conduit for secondary containment. This segmentation allows independent functionality of each conduit while providing layered protection against leaks, resolving the contradiction between simple structure and leak prevention.
2Object-affected harmful factors
If containment mechanisms are added to prevent leaks, then safety is improved, but the system becomes more complex
Solution Approach 1:
By nesting the inner conduit within the outer conduit, the patent provides dual containment functionality in a space-efficient manner. The inner conduit handles chemical transport while the outer conduit provides leak containment, reducing the harmful effects of chemical leaks without requiring separate, bulky containment structures.
Solution Approach 2:
The containment mechanism uses conduit walls as flexible barriers to contain chemicals. The inner conduit wall provides primary containment while the outer conduit wall provides secondary containment, using thin film structures to prevent chemical leaks without adding excessive structural complexity.
3Reliability
If double containment conduits are used, then leak containment is effective, but the device complexity increases
Solution Approach 1:
The double containment system nests the inner conduit within the outer conduit, creating an integrated leak containment structure. This nested configuration provides effective leak containment by ensuring that any chemical leakage from the inner conduit is captured by the outer conduit, while maintaining a relatively compact and organized device structure.
Solution Approach 2:
The patent merges the containment function with the transport function by integrating the inner and outer conduits into a single assembled unit. This combining of functions reduces device complexity compared to having separate, independent containment and transport systems, while still providing effective leak containment.
Data Source
AI summary
Provided is a chemical injection system for connection to a chemical tank and a process line. The system includes a pump box configured to attach to the tank, the pump box including a body defining an interior, a pump assembly disposed within the interior of the body of the pump box, and an injection assembly configured to be fluidly coupled to the pump box. The injection assembly includes an injection lance having a flange and a stem, a first seal abutting a first side of the flange of the injection lance, and a second seal abutting a second side of the flange of the injection lance.