Optimal design of large-scale precipitation reactors
How the optimal reactor looks like
Precipitation reactors are used for various purposes, including the recovery of valuable products. In this case, precipitation on fluidized pellets was the core principle. An optimal reactor has the following properties:
- Wash out of (fine) pellets is prevented
- Chemicals dosed at the bottom are optimally mixed in the lower part
- Pellet fluidization is homogeneous, with no shortcircuiting through the bed
- Reactor height is kept minimal
Together with our client we are defining the optimal design of such reactors, by virtually redesigning them without the need for real-life testing.
A very realistic full-scale 3D model
We use so-called 'multiphase CFD', realistically accounting for both water and pellets (solids). Different pellet classes with different sizes and densities were added to the model and fluidization of each class could be assessed.