Refractory Selection Guide for Fluid Catalytic Cracking Units (FCCU)

The function of a Fluid Catalytic Cracking Unit (FCCU) is to crack feedstock such as crude residues and gas oil and produce distillates. Distillates are light hydrocarbon gases, which serve as petrochemical feedstock, are other end products of the cracking process.

Parts and Functions of an FCCU

The main parts of an FCCU are cyclones, risers, transfer lines, slide valves, reactor/ regenerator, CO boilers/ Flue gas lines, heaters/ pre-heaters and stacks/ incinerators.

The functions of the main FCCU sections are as follows:

  • Reactor/regenerator separates and regenerates catalysts
  • Slide valves regulate catalyst flow
  • Transfer lines connect the vessels
  • Risers host the cracking reaction most of the times
  • Cyclones separate catalyst particles from the product stream
  • Stacks/incinerators clean up emissions
  • Heaters/pre-heaters heat the feedstock
  • CO boilers/flue gas lines convert CO to CO2 and generate steam through a waste heat boiler

ANH Products for Different Sections of FCCUs

Listed below are ANH products that can be used in FCCU sections. These products maximize lining life and require minimum maintenance.

Cyclones

Operational Conditions Typical Products
Severe Erosion Excelerate ABR Plus
Impingement Coral Plastic 28-82
Greenpak 85P

Stripper

Operational Conditions Typical Products
Mild to Moderate Erosion Lo-Abrade G
Greenlite 45L G
Kast-O-Lite 23 ES
Kast-O-Lite 26 LI C/G

Transfer Lines, Risers, Slide Valves

Operational Conditions
Typical Products
Severe Erosion Greenkleen 60 Plus
Abrasion Versaflow Thermax Plus
Coke Penetration Versagun Thermax Adtech
Corex Express

Reactor/Regenerator

Operational Conditions
Typical Products
Mild Erosion Greenlite 45L G
Reducing Environment Kast-O-Lite 23 ES
Coking Kast-O-Lite 26 LI C/G

CO Boilers/Flue Gas Lines

Operational Conditions
Typical Products
Thermal Shock Lo-Abrade G
Mild to Moderate Erosion Greenlite 45L G
Chemical Reaction Versagun Thermax Adtech

This information has been sourced, reviewed and adapted from materials provided by ANH Refractories Europe.

For more information on this source please visit ANH Refractories Europe.

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