- Crystallization driven by hot water or steam
- Highest capacity rates
- Different models to cover all types of streams
AVAILABLE MODELS AND MAIN TECHNICAL CHARACTERISTICS
This type of crystallizer is specially recommended for industries with continuous operation or available waste heat, where operating cost savings outweigh higher initial investment.
Thermal crystallizers take the energy of evaporation from saturated steam or hot water and condense the resulting vapour against a cooling water supply.
We manufacture four models that cover the whole range, DESALT VR, DESALT DRY, DESALT MFE-1, and DESALT VTR.
Technology: Evaporation with thermal energy
Capacity (l/day): 2000 to 20000
Electricity consumption per 1 m³ of distillate produced: 4,2 to 5 kWh/m³
Thermal energy for evaporation: Saturated steam or hot water
Thermal energy for condensation: Cooling water
Vacío: ≈ 200 mbar
Evaporation temperature: ≈ 60 °C
Technology: Evaporation with thermal energy
Capacity (l/day): 500 to 3000
Electricity consumption per 1 m³ of distillate produced: 2,7 to 7,4 kWh/m³
Thermal energy for evaporation: Saturated steam or hot water
Thermal energy for condensation: Cooling water
Vacuum: ≈ 200 mbar
Evaporation temperature: ≈ 60 °C
Technology: Evaporation with thermal energy
Capacity (l/day): 20000 to 100000
Electricity consumption per 1 m³ of distillate produced: 26 to 48 kWh/m³
Thermal energy for evaporation: Saturated steam or hot water
Thermal energy for condensation: Cooling water
Vacuum: ≈ 200 mbar
Evaporation temperature: ≈ 60 °C
Technology: Evaporation with thermal energy
Capacity (kg/day): 10000
Electricity consumption per 1 m³ of distillate produced: 5,5 kWh/m³
Thermal energy for evaporation: Saturated steam
Thermal energy for condensation: Cooling water
Vacuum: N/A
Evaporation temperature: ≈ 100 °C (Patm)
KEY ADVANTAGES
- Versatility: Robust and reliable crystallizers that can manage complex effluents in demanding industrial environments.
- The widest capacity range: From 500 l/day to 100,000 l/day.
- Lower OPEX: Lower operating costs for high volumes and/or continuous operation.
MAIN COMPONENTS
OPERATION OF OUR THERMAL CRYSTALLIZERS
External heat input
Saturated steam or hot water delivers the energy of evaporation to the effluent, through a shell-and-tube exchanger on the VR, DRY and MFE-1 models or through an external jacket on the VTR. This is the only heat the process requires, and on most sites it comes from plant that already exists.
Evaporation under vacuum
A venturi ejector or liquid ring pump holds the vessel at approximately 200 mbar, lowering the boiling point to around 60 degrees Celsius. Working below atmospheric temperature slows scaling, protects heat-sensitive compounds and reduces the thermal duty. The VTR is the exception, evaporating at atmospheric pressure and around 100 degrees Celsius for saturated salt solutions.
Keeping the heat transfer surface clean
Each model solves this differently. The VR runs a motorised scraper across the surface, the DRY a screw conveyor that also homogenises the concentrate, the MFE-1 a high-speed recirculation pump whose velocity prevents deposits forming, and the VTR a cyclone separator suited to very high solids loads.
Crystallization, condensation and discharge
As water leaves the solution the dissolved solids pass their solubility limit and crystallize in the conical bottom of the vessel. Cooling water condenses the vapour to recover it as distillate, and the solid fraction is discharged automatically. Operation is fully automatic, 24 hours a day.
THERMAL CRYSTALLIZERS CONFIGURATIONS
We offer thermal crystallizers vaporators in a wide capacity range to adapt the solution to each client’s capacity, energy availability, and budget constraints.
When smaller flows, lower heat availability or lower CAPEX are priorities, the lower end of the range will meet all the requirements.
The higher end of the range, with the DESALT MFE-1, will handle higher flows when heat energy is available, optimizing OPEX in the long term.