Double-Containment Chemical Injection Lance for Leak Return

The patent implements double containment by nesting an inner conduit within an outer conduit. The inner conduit carries the chemical from the pump to the injection point, while the outer conduit surrounds it to provide secondary containment. This nested structure ensures that if the inner conduit leaks, the outer conduit captures the泄漏 and returns it to the chemical tank, preventing environmental release while maintaining the chemical dosing function.

The chemical injection system is segmented into distinct functional components: the pump assembly, the inner conduit, the outer conduit, and the injection lance. This segmentation allows each component to be optimized for its specific function while maintaining overall system reliability. The separation of containment functions into inner and outer conduits enables independent maintenance and inspection of each segment.

The inner conduit is nested within the outer conduit, creating a compact double containment structure. This nesting minimizes the space required for the containment system while providing robust leak prevention. The inner conduit is positioned coaxially within the outer conduit, with the annular space between them allowing for thermal expansion and ease of installation.

The outer conduit acts as an intermediary containment barrier between the inner conduit and the environment. It mediates the potential harmful effect of chemical leakage by capturing any leaks from the inner conduit and redirecting them back to the chemical tank through drainage ports, thereby preventing direct environmental release.