Anchoring Element Delimiting Tab for FCC Unit Coating

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing anchoring structures for anti-erosion coatings in fluid catalytic cracking units are prone to degradation due to interstices between the metal anchoring elements and concrete, leading to corrosion, sulphidation, carburization, and coke formation, which can cause detachment of the coating during temperature cycles.

Innovation Solution

A metal anchoring element with a delimiting tab is used to ensure complete coverage of the composite material, preventing interstices and enhancing resistance to degradation by positioning the tab a predetermined distance away from the fastening edge, allowing for uniform coating thickness and reduced gas infiltration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional anchoring structures are used without delimiting tabs, then the anchoring elements can be simple in design and easier to manufacture, but interstices form between the anchoring elements and concrete coating, leading to corrosion, sulphidation, carburization, and coke formation

Engineering Contradiction:

Improveresistance to corrosion and degradationVSAvoidcomplexity of anchoring element structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The anchoring element is segmented into functional zones: a fastening edge for attachment to the metal wall, an anchoring body for structural support, and delimiting tabs that segment the coating application area. This segmentation ensures the concrete coating is properly contained and prevents interstice formation while maintaining manufacturing feasibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The delimiting tabs are pre-formed on the anchoring element before concrete coating application. These tabs create preliminary boundaries that guide the concrete application process, ensuring complete coverage of the anchoring element and preventing gas infiltration pathways before the coating is even applied.

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If the concrete coating is applied flush with the top of anchoring elements, then the coating application process is simpler, but interstices remain that enable gas diffusion and catalyst particle penetration

Engineering Contradiction:

Improveease of coating applicationVSAvoidgas infiltration and catalyst penetration

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The delimiting tabs act as intermediary structures between the anchoring element and the concrete coating. They extend beyond the anchoring body to create a physical barrier that prevents gas infiltration and ensures the concrete coating completely covers the anchoring element, eliminating interstices that would otherwise form at the interface.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If anchoring elements are used in isolation without contact with adjacent anchoring elements, then they can be easily installed on complex geometry surfaces, but the coating may not be uniformly supported and interstices may form between adjacent areas

Engineering Contradiction:

Improveadaptability to complex surface geometryVSAvoiduniformity of coating thickness

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The delimiting tabs provide multiple functions: they serve as boundaries for concrete application, ensure complete coverage of isolated anchoring elements, and maintain uniform coating thickness. This universal feature enables the anchoring elements to be used in various configurations (isolated or assembled) while maintaining coating quality and preventing interstice formation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10145613B2Element for anchoring an anti-erosion coating to an inner wall of a chamber of an FCC unit

Publication Date: 2018.12.04 TOTALENERGIES ONETECH

AI summary

The invention relates to a metal element (12) for anchoring an anti-erosion coating that is intended to be fastened alone in an isolated manner to a metal wall or assembled with other identical anchoring elements. The anchoring element (12) has an edge (12a) for fastening to said metal wall and an anchoring body firmly attached to the fastening edge (12a) and having an upper edge (12b) that is away from the fastening edge and intended to be covered by a composite material of concrete type. A section of this upper edge (12b), which is not intended to be juxtaposed and assembled with an upper edge of an identical anchoring element, is provided with a delimiting tab (16) in order to delimit a height of composite material that must cover the upper edge (12b) of said anchoring element, said delimiting tab (16) having a delimiting edge (18) that is a predetermined distance away from a plane defined by the upper edge (12b) of the anchoring element.