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Vacuum Crystallizers

The CMM Group, in partnership with Condorchem Envitech S.L., offer their extensive experience in the design, manufacture and installation of vacuum crystallizers for a wide variety of specialized applications.

Our vacuum crystallizers are custom-designed for the treatment of effluents with a high contaminant load and the concentration of raw materials.

Our DESALT® equipment allows us to obtain a very high percentage of clean water to be discharged or reused, and a minimum solid concentrate to be sent to a manager or used as raw material to be recovered or by-product.

Crystallization is a good option if you opt for zero discharge. This technology is especially suitable for high salinity effluents (brines).

Desalt MFE_1 effect hot water crystallizer

Our range of crystallizers for wastewater treatment includes the following equipment:

Desalt LT DRY

For applications that require simultaneous concentration and drying in the same equipment, brine crystallization, concentration of exhausted working baths and concentration of extracts and fragrances. The process allows the extraction of the product manually or with the help of an optional spindle. It is a vacuum evaporator-crystallizer, of horizontal construction, electric and low temperature. Its operation is by means of an electric heat pump, it has a very compact structure and does not generate emissions or odors. It can be built in highly corrosion resistant materials if required. The system is designed to obtain solid, crystalline, pasty or gelatinous concentrates, as well as to recover raw materials present in the wastewater solution.
Its capacity can range from 250 L/day to 1,000 L/day.

How does a Vacuum Crystallizer Work?

Crystallization is a separation method in which a solid (crystal or precipitate) is formed from a homogeneous phase, liquid or gas. The solid formed can become very pure, so crystallization is also used industrially as a purification process.

For crystallization to take place, it is an essential condition that the solution be supersaturated. Crystallization processes differ from each other in the method by which supersaturation is achieved. In general, it can be achieved in three different ways:

  1. Supersaturation produced by cooling of the solution with negligible evaporation.
  2. Supersaturation produced by evaporation of the solvent with little cooling.
  3. Evaporation by combination of cooling and evaporation in adiabatic evaporators (vacuum crystallizers).

The crystallization process is not simple and the most important stage consists in the formation of solid crystals within the liquid solution. The solution is concentrated and cooled until the concentration of the solute is greater than the solubility at that temperature and the solute forms nearly pure crystals.

Desalt LT VR

For applications that require the treatment of encrusting liquids, brine treatment, glue treatment, inks and paints, etc. It is a vacuum evaporator-crystallizer, with vertical construction and internal scraper with blades, heating is produced using steam or hot water. It can be manufactured with highly corrosion resistant materials if required. It is designed for the concentration to crystallization of brines and concentrated fluids coming from an evaporator. In the case of organic fluids, it allows concentration to form a paste. This equipment is especially recommended for the treatment of encrusting wastewater and high-density aqueous solutions. Its capacity can range from 500 L/day to 3,000 L/day.

Crystallizer Typical Applications

  • Treatment of effluents with a high contaminant load
  • Solution in cases where it is impossible to discharge treated effluents (implementation of a zero liquid discharge system)
  • Effluent treatment when conventional techniques are not effective (as in the case of brines)
  • Raw material concentration

Crystallizer Typical Advantages

  • Minimization of the volume of waste to be managed
  • Significant reduction in waste management costs
  • Possibility of implementing a zero liquid discharge system
  • Compliance with current regulations on effluent discharge
  • Reduced need to store large volumes of waste
  • Reduction of greenhouse gas emissions generated in the transport of waste
  • Absence of reagents (except antifoam in some cases)


Download a Vacuum Crystallizer brochure

Call (920) 336-9800 to let us know how The CMM Group can assist you.