Tar oil cooling

Tar oil cooling 640x360

A German chemicals producer decided to exchange their existing shell-and-tube for a DuroShell plate-and-shell heat exchanger in one of its coal tar distillation plants. They had previously experienced heavy fouling and frequent clogging with their shell-and-tube solution – leading to high maintenance costs.

After evaluating Alfa Laval’s DuroShell, the plant engineers realized it would be a perfect coal tar cooler. Its highly turbulent flow minimizes fouling, and the clogging problems have been eliminated.

The turbulent flow also maximizes heat transfer, allowing the unit to be up to five times smaller than a comparable shell-and-tube. The design enables the heat exchanger to operate with crossing temperatures and a very small temperature approach, which further increases efficiency and reduces cooling water needs.


  • No more clogging in the heat exchanger
  • Major savings in maintenance costs
  • Compact solution and easy installation

Alfa Laval DuroShell RollerCoasterRollerCoaster

Robust and efficient performance

A patented plate pattern optimizes thermal efficiency with improved fatigue resistance, flow distribution and mechanical strength. 

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Alfa Laval DuroShell PowerPackPowerPack

Optimized flow distribution and fatigue resistance

Patented design enables improved fluid distribution, mechanical strength and unparalleled fatigue resistance. 

Watch animation to learn more about this unique feature