HPD® Technologies Offering

HPD® Technologies Offering

Evaporation and Crystallization Technologies from Veolia

Industry Leading Evaporation and Crystallization Solutions

Veolia has the largest number of successful installations and experience across the widest range of applications for large-scale, industrial evaporation and crystallization equipment. This includes treatment of wastewater for zero liquid discharge as well as industrial crystallization for production of premium crystalline chemicals. 

HPD® Evaporation and Crystallation technologies from Veolia, with over 1,200 references in more than 30 countries, have been utilized in most major industrial markets.

Evaporation Technologies

HPD Falling Film evaporators concentrates black liquor up to 80% TS

HPD® Falling Film evaporators concentrates black liquor up to 80% TS

The main application for thermal evaporation is separation of a solvent (in most cases, water) from dissolved solids in a solution. This separation often involves concentration of brine and recovery of high-quality water for beneficial reuse. Evaporation is often used when membrane technologies become impractical at higher concentrations of total dissolved solids (TDS).

The type of evaporator used will largely depend on the chemistry of the solution to avoid scaling of heat transfer surfaces. Furthermore, each solution also accounts for available energy sources, efficiency requirements, and qualitative aims for the water reclaimed in the process 

HPD® Brine Concentration used as wastewater evaporator as part of ZLD system

HPD® Brine Concentration used as wastewater evaporator as part of ZLD system

Based on the specific application, Veolia offers several equipment technologies for evaporation that include:

  • Falling film
  • Natural circulation
  • Rising film
  • Forced circulation
  • Enhanced Forced Circulation (turbulence enhancers for highly viscous feed)

Potential evaporator configurations include:

  • Mechanical vapor recompression (MVR)
  • Multiple-effect evaporation (MEE)
  • Multi-stage flash (MSF)
  • Thermal vapor recompression (TVR)

Crystallizer Technologies

Veolia is the industry leader in industrial crystallizers which produce chemicals such as ammonium sulfate

Veolia is the industry leader in industrial crystallizers which produce chemicals such as ammonium sulfate

A variety of HPD® Crystallization technologies allow production of specialty and premium chemicals as a crystalline product and are also often applied in the treatment of difficult-to-process waste streams.  

In wastewater applications, specifically in Zero Liquid Discharge (ZLD) systems, wastewater crystallizers (mixed salt) recover additional water for reuse and generate a crystalline product suitable for landfill disposal.

Veolia offers a full range of crystallizers to suit the requirements of industry including: 

Fully Integrated Systems

Nanofiltration system for aquifer banking - highly integrated HPD® ZLD System

Nanofiltration system for aquifer banking - highly integrated HPD® ZLD System

A fully integrated system provides customers with a total solution to satisfy the requirements of each unique project. The expertise and understanding of each element of a total system design allows Veolia to fully optimize the entire process upstream and downstream of the evaporation and crystallization equipment. This total system approach allows guarantees on mechanical, process, and schedules for the entire scope supplied by Veolia.

Each system is designed to fully integrate into the host and provide mechanical, process, and schedule guarantees of the entire installation by Veolia.

Integrated stripping system and methanol handling system, Brazillian pulp & paper industry

Integrated stripping system and methanol handling system, Brazillian pulp & paper industry

Auxiliary system components often provided with an HPD® Evaporation and/or Crystallization system includes

  • Vapor compressors
  • Heat exchangers
  • Condensers
  • Reboilers
  • De-gasifiers
  • Scrubbing systems
  • Solids handling equipment; drying equipment, centrifuges, filtration
  • Pre-treatment and/or post-treatment systems often including integration of Veolia technologies such as RO, clarification, softening, ion exchange, deoiling, biological treatment, filtration, and anaerobic digestion
  • Distillation or stripping systems