Retractable Nozzle for Refractory-Lined Equipment Inspection
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Solution Overview
Problem
In the oil and gas industry, nozzle inspections and repairs in refractory-lined equipment are time-consuming and pose safety risks due to the need for physical entry into confined spaces, often resulting in quality issues and collateral damage.
Innovation Solution
The development of externally retractable nozzle assemblies that allow for inspection and replacement of nozzle cartridges outside the equipment, featuring a removable outer sleeve and prefabricated refractory linings, eliminating the need for physical entry and enabling faster, safer repairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical entry into refractory-lined equipment is performed for nozzle inspection and repair, then direct visual examination and hands-on repair work can be performed, but worker safety risks increase and the process becomes time-consuming
Solution Approach 1:
The nozzle assembly is extracted from the refractory lining through a removable outer sleeve, allowing the nozzle cartridge to be removed and inspected externally without physical entry into the equipment. This extraction principle eliminates the need for workers to enter confined spaces while maintaining direct access to the nozzle for inspection and repair operations.
Solution Approach 2:
The nozzle assembly is segmented into distinct components: an outer sleeve that remains in the equipment wall, a removable nozzle cartridge containing the actual nozzle, and refractory lining. This segmentation allows the nozzle cartridge to be independently removed and inspected without disturbing the refractory lining or requiring physical entry into the equipment interior.
2Ease of repair
If refractory materials are removed to access the nozzle for repair, then the nozzle can be accessed and repaired, but collateral damage occurs and the process becomes more complex
Solution Approach 1:
The outer sleeve is designed with a removable connection to the equipment wall, allowing the nozzle assembly to be accessed and removed before any refractory material removal is needed. This preliminary action of removing the outer sleeve simplifies the repair process by eliminating the need to break away refractory materials to reach the nozzle.
Solution Approach 2:
The nozzle cartridge is extracted through the removable outer sleeve, allowing repair operations to be performed without removing surrounding refractory materials. This extraction approach maintains the integrity of the refractory lining while providing direct access to the nozzle for inspection and repair.
3Ease of operation
If mechanical means are used to remove refractory materials, then the nozzle can be accessed, but time consumption increases and quality issues may arise
Solution Approach 1:
The nozzle assembly is divided into separable components (outer sleeve, nozzle cartridge, refractory lining) that can be removed independently. This segmentation allows the nozzle cartridge to be accessed and replaced without time-consuming mechanical removal of refractory materials, significantly reducing inspection and repair time.
Solution Approach 2:
The outer sleeve is designed to be removable from the equipment wall in advance, providing a pre-established access pathway. This preliminary design feature eliminates the need for time-consuming mechanical removal of refractory materials during repair operations, as the access pathway is already prepared.
Data Source
AI summary
A refractory-lined equipment includes a vessel defining an interior at least partially lined with a refractory material, and a nozzle assembly coupled to the vessel and extending into the interior. The nozzle assembly includes an outer sleeve fixed to the sidewall and extending through an aperture defined in the sidewall, the outer sleeve defining a central passageway, and a nozzle cartridge assembly positionable within the central passageway and including an inner sleeve, a refractory lining disposed about the inner sleeve, and a nozzle positioned within the inner sleeve. The nozzle cartridge assembly is removably coupled to the outer sleeve external to the vessel.