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Offering complete evaporation plant design, supply, installation, and start up services. Our equipment is designed in-house using the latest developments and technology in the market. Quality and performance is the focus for everything we build.


RDG crystallizer systems are utilized for zero liquid discharge applications to convert diluted or concentrated salt solutions into solid salt crystals and clean water.

Crystallization is a solid-liquid separation technique in which solid crystals are formed from a liquid solution. Crystallizers can eliminate liquid wastes to create zero liquid discharge (ZLD). Crystallization is divided into two stages: primary nucleation and secondary nucleation. Primary nucleation involves the growth of new crystals. Secondary nucleation perpetuates growth and is the main stage that causes the mass production of crystals.

Our expertise includes the following crystallization process types:

  • by concentration
  • by cooling (under vacuum or with a heat exchanger)
  • by reaction or equilibrium displacement


We possess the know-how and expertise for all of the following types of crystallization equipment with total or partial classification, involving the recirculation of the magma, with or without settling zones.

  • Forced Circulation Crystallizer
  • Oslo Type Crystallizer (classified-suspension crystallizer)
  • DTB Crystallizer (draft – tube – baffle crystallizer)
  • Induced Circulation Crystallizer
  • Cooling Crystallizers
  • Evaporative Crystallizers
  • Freeze Crystallizers
  • Melt Crystallizers
  • Vacuum Crystallizers


Our staff engineers are able to design complete systems for custom applications, optimizing process efficiency and final discharge quality.

Laser Welding is the Standard

Rosenblad Design Group, was the first to introduce laser welded evaporator plates to the Pulp and Paper industry back in 1994. This innovation brought major opportunities to the market in both design enhancements and product durability.

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