- They operate on electrical energy
- They allow the recovery of materials that would degrade at high temperatures
- Compact equipment for small and medium volumes of wastewater
AVAILABLE MODELS AND MAIN TECHNICAL FEATURES
Our industrial heat pump crystallizers enable brines to be concentrated to obtain valuable solid crystals and high-quality water for reuse.
Thanks to their low vacuum temperature, our heat pump crystallizers are the perfect option for the evaporation of heat-sensitive and/or corrosive products, as they reduce the risk of thermal degradation of the product and deterioration of construction materials.
We offer two models of heat pump crystallizers:
- The DESALT LT VR model uses a vertical vessel with a scraper and covers a wider capacity range, making it the suitable option for the continuous treatment of streams with a tendency to form deposits.
- The DESALT LT DRY model achieves higher concentration rates until a dry solid is obtained. It is suitable for applications whose objective is to minimize waste volume or recover a valuable raw material or by-product.
Both models operate on electricity and do not require any thermal energy source on-site.
At Condorchem Enviro Solutions, we offer a wide range of crystallizers for wastewater management.
Technology: Heat pump (Freon R-513A)
Capacity (l/day): From 250 to 3.500
Electricity consumption per 1 m³ of distillate produced: 220 kWh/m³
Vacuum: ≈ 60 mbar
Evaporation temperature: ≈ 35 °C
Technology: Heat pump (Freon R-513A)
Capacity (l/day): From 250 to 1000
Electricity consumption per 1 m³ of distillate produced: 270 kWh/m³
Vacuum: ≈ 60 mbar
Evaporation temperature: ≈ 35 °C
WHICH HEAT PUMP CRYSTALLIZER BEST SUITS YOUR NEEDS?
| Model | Capacity | Consumption | Application | Advantages |
|---|---|---|---|---|
| DESALT LT VR | 250–3.500 L/day* | 220 kWh/m³ of distillate* | Concentration of effluents prone to scaling and requiring mechanical cleaning of heat transfer surfaces | An internal motorized scraper helps control deposits on heat transfer surfaces during the concentration and crystallization of salts. It offers a wider capacity range than the two models. |
| DESALT LT DRY | 250–1.000 L/day* | 270 kWh/m³ of distillate* | Smaller volumes aimed at obtaining a solid or semi-solid concentrate | Designed to produce solid or semi-solid waste. An optional internal screw homogenizes the concentrate and facilitates automatic discharge. |
Published reference values based on operation with clean water under standard conditions. The actual flow rate and energy consumption depend on the composition of the wastewater, operating conditions, and the required final concentration.
MAIN OPERATIONAL ADVANTAGES
- They do not require thermal energy, as these units operate on electricity, eliminating the need for a separate boiler or a thermal oil circuit, which simplifies their installation and maintenance.
- They operate at low temperatures, with an evaporation temperature of around 35 °C. These low boiling temperatures at atmospheric pressure reduce scale formation, protect thermolabile compounds, and keep the equipment outside the scope of regulations governing pressure vessels.
- They facilitate waste management and water recovery, as the internal mechanical devices help keep the heat-transfer surfaces clear and automatically discharge the crystallized residue. This reduces the volume of liquid waste requiring storage and transport, while allowing water to be recovered for possible reuse.
- They are compact units that occupy little space in the plant. In addition to being the smallest crystallizers, they also do not require additional equipment for supplying steam or hot water, as they operate entirely on electrical energy.
MAIN COMPONENTS OF EACH MODEL
The following video shows in detail the main components of our DESALT LT DRY vacuum crystallizer.
OPERATION OF OUR HEAT PUMP CRYSTALLIZERS
Vacuum generation and low-temperature boiling
A vacuum is generated inside the evaporation chamber, reducing the pressure and, in turn, lowering the temperature required for the effluent to boil to 35 °C. These low evaporation temperatures limit the heat exposure of the stream being treated and reduce the risk of thermal degradation of temperature-sensitive compounds.
Heating and evaporation by heat pump
A closed-loop heat pump supplies the energy required for evaporation. The compressor increases the pressure and temperature of the refrigerant. The hot refrigerant then releases heat through the heating jacket, causing the water to evaporate while the remaining solution progressively concentrates.
Steam condensation and heat recovery
After releasing heat, the refrigerant passes through an expansion valve, reducing its pressure and temperature. It then absorbs heat from the water vapor in a separate heat exchanger, condensing the vapor into distillate. The refrigerant returns to the compressor, allowing the cycle to recover and reuse the heat.
Crystallization and waste discharge
As water is removed, crystallizable salts reach supersaturation and form crystals. Further concentration produces a solid or semisolid residue. Optionally, an internal screw can be installed to homogenize the concentrate and facilitate automatic discharge.