Braskem Uses Coupled Rocky-ANSYS Multiphase 

Flow Simulations to Mitigate Coke Build-Up Issues

The petrochemical industry produces millions of tons of products per year that are heavily present in modern life. In the olefins plants, equipment with great importance are the pyrolysis furnaces, which are responsible for thermally cracking naphtha, LPG, ethane, and recycle streams to produce the main products of the petrochemical industry. One of the main problems of the pyrolysis furnaces is the gradual formation of carbon and hydrogen, known commonly as coke, in the coil walls of the furnaces.

 

To solve this problem in their plants, Braskem bet on simulation tools, like Rocky DEM and ANSYS, and won results like avoiding undesirable operational problems generated due to coke accumulation in the transfer line, saving maintenance costs, and ensuring safer operation of the equipment with greater efficiency.

 

Braskem used Rocky DEM coupled with ANSYS to:

- Numerically replicate the geometries of the transfer line of the pyrolysis furnaces;

- Evaluate the impact of the operational conditions and geometries upon the velocity and pressure profiles of the material, which enabled them to predict coke build-up along the transfer line;

- Analyze the particle-to-particle and particle-to-boundary interactions.

 

Discover how Braskem:

- Used the coupled simulations to replicate multiphase flow behavior in order to avoid undesirable operational problems;

- Saved maintenance costs;

- Ensured safer operation of the equipment with greater efficiency.

 

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