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

Patent metadata

Field	Value
Publication number	US-10048006-B2
Application number	US-201515524820-A
Country	US
Kind code	B2
Filing date	Nov 3, 2015
Priority date	Nov 7, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

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.

First claim

The invention claimed is:

1. A process for producing an anti-erosion coating on an inner or outer metal wall of a chamber of a fluid catalytic cracking unit, comprising:
(i) fastening a plurality of metal anchoring elements on the metal wall, each anchoring element being fastened alone in an isolated manner to the metal wall or being fastened to the metal wall assembled with other identical anchoring elements, the fastening being carried out by welding to the metal wall a fastening edge of each anchoring element, each anchoring element having:
a fastening edge fastened to the metal wall, and
an anchoring body firmly attached to the fastening edge, the anchoring body having an upper edge that is away from the fastening edge and defining a plane,
wherein at least one section of the upper edge, which is not juxtaposed and assembled with an upper edge of another identical anchoring element, is provided with a delimiting tab in order to delimit a height of composite material that must cover the upper edge of the anchoring element, the delimiting tab having a delimiting edge that is a predetermined distance away from the plane defined by the upper edge of the anchoring element,
(ii) applying a layer of a composite material to the metal wall, the thickness of this layer being selected so that the composite material covers or is flush with the delimiting edge of the delimiting tabs of each anchoring element and so that the remaining part of the upper edge of each anchoring element is covered by a layer of composite material, the thickness of which is at least equal to the predetermined distance, wherein the anti-erosion coating comprises at least one of the anchoring elements embedded in the composite material, the composite material extending up to the delimiting edge of the delimiting tab, above the upper edge of the at least one anchoring element, so that the composite material covers or is flush with the delimiting edge of the delimiting tab and so that the remaining part of each anchoring element is covered by a layer of the composite material, the thickness of which is at least equal to the predetermined distance.

2. The process of claim 1 , wherein the anchoring element is intended to be fastened to the metal wall assembled with other identical anchoring elements in order to form a honeycomb anchoring structure, the anchoring element having a fastening edge intended to be fastened to the metal wall, and an anchoring body firmly attached to the fastening edge, the anchoring body having an upper edge that is away from the fastening edge and intended to be covered by a composite material of concrete type, the upper edge defining a single plane, the anchoring body being formed from a strip divided along its length into a plurality of portions, first strip portions extending in a first plane parallel to the longitudinal direction of the strip, second strip portions extending in a second plane parallel to the first plane and different from the first plane, third strip portions each connecting a first strip portion to a second strip portion, the first and second strip portions being alternated over the entire length of the strip, the anchoring element being characterized in that the:
at least one section of the upper edge is provided with a delimiting tab in order to delimit a height of composite material that must cover the upper edge of the anchoring element, the delimiting tab having a delimiting edge that is a predetermined distance (d) away from the plane defined by the upper edge of the anchoring element,
at least one section of the upper edge provided with a delimiting tab is part of an upper edge of a third portion of the strip.

3. The process of claim 2 wherein each third portion of the strip is provided with a delimiting tab.

4. The process of claim 3 wherein the delimiting tab extends over a part of the length of the upper edge.

5. The process of claim 1 wherein in the anchoring element is made of austenitic stainless steel selected from the group consisting of:
a stainless steel containing from 0.04% to 0.10% by weight of carbon, from 18% to 20% of chromium and from 8% to 10.5% of nickel, and with a manganese content of at most 2% by weight,
a stainless steel containing from 0.04% to 0.10% by weight of carbon, from 17% to 19% of chromium and from 9% to 12% of nickel, and with a niobium content of from 8 times the carbon content to 1% by weight,
a stainless steel containing at most 0.015% by weight of carbon, from 15% to 17% of chromium and from 33% to 37% of nickel,
a stainless steel containing at most 0.10% by weight of carbon, from 24% to 26% of chromium and from 19% to 22% of nickel,
a stainless steel containing at most 0.08% by weight of carbon, from 17% to 19% by weight of chromium, from 9% to 12% by weight of nickel, a titanium content of from 5 times the carbon content to 0.70% by weight, a manganese content of at most 2% by weight, a silicon content of at most 1% by weight, and
a stainless steel containing at most 0.15% by weight of carbon, from 11.5% to 13.5% by weight of chromium, a manganese content of at most 1% by weight, a silicon content of at most 1% by weight.

6. The process of claim 2 further comprising a structure for anchoring an anti-erosion coating to the inner or the outer metal wall of the chamber of the fluid catalytic cracking unit formed from an assembly of the anchoring elements, in which the first portions of a strip of the anchoring element are juxtaposed and assembled with the second portions of a strip of an adjacent anchoring element so as to form a plurality of hexagonal cells.

Assignees

• Total Raffinage Chimie

Inventors

• Decker Sébastien
• Simon Hubert

Classifications

• B01J19/02

  Apparatus characterised by being constructed of material selected for its chemically-resistant properties · CPC title

• C22C38/04

  containing manganese · CPC title

• B32B15/18

  comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)} · CPC title

• C22C38/40

  with nickel · CPC title

• C10G75/00

  Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general (C10G7/10, C10G9/16 take precedence) · CPC title