The DESALT DRY series vacuum crystallizer is designed to obtain semi-solid concentrates, as well as for recovering valuable raw materials (metals and salts).

The equipment can be manufactured to operate using saturated steam or hot water to heat the product that needs to be concentrated. The condensation of the vapour produced from the wastewater is carried out by suppling cooling water.

Standard manufacturing in 1.4401/1.4404 (AISI 316/AISI 316L) stainless steel. According to the water to be treated, the parts of the equipment in contact with the fluid can be made of special corrosion-resistant alloys.

Semi-automatic or fully automatic operation (depending on the model) 24 hours a day.

Our evaporators DESALT DRY

Main features

  • Vessel: A detachable, horizontal-type evaporation vessel made of stainless steel, equipped with an inspection glass and a front door for extracting the semi-solid concentrate. It includes thermal insulation to prevent contact and improve energy efficiency.
  • Main heat exchanger: The evaporation vessel incorporates an external, high-performance jacket heat exchanger to provide thermal energy for heating the product to be concentrated. It requires a saturated steam supply at 3 barg or, alternatively, hot water at 90 °C.
  • Condenser: A stainless-steel plate heat exchanger to allow cooling of the vapour produced and, consequently, its condensation. It requires cooling water supply at 27 °C.
  • Demister to capture droplets of the wastewater within the vapour produced.
  • Distillate tank: The distillate is stored in a stainless-steel tank and is discharged by a centrifugal pump controlled by level switches.
  • Vacuum generation system consists of a Venturi ejector, a centrifugal pump and a stainless-steel vacuum tank that contains chilled water to cool the vacuum circuit. The vacuum tank is equipped with a coil-type heat exchanger that requires a cooling water supply at 15 °C.
  • Semi-solid concentrate discharge: Manual through the front door or semi-automatic/automatic by means of a screw conveyor placed inside the evaporation vessel. The duration of the concentration cycle is programmed with a timer.
  • Instrumentation: Digital and analogue control instruments for the automatic monitoring of the system.
  • Electrical command and control panel with emergency stop. IP55 protection. The power supply of the panel is 400 V, 50 Hz. Siemens PLC with touch screen for visualization and control of operating data.
  • Supporting structure: Unit mounted on a stainless-steel skid.

Optional features

  • Semi-automatic/automatic discharge system.
  • Chiller to produce cooling water necessary for cooling the vacuum circuit.
  • Teleservice Control System for remote assistance.
  • Condensation by air condenser on request.
  • Manufacturing with special material on request.
  • Other voltage supply on request.
  • Other PLC manufacturer on request.

Technical specs

Parameter Unit 500 750 1000 1500 3000
Capacity L/day 500 750 1000 1500 3000
Electrical consumption kWh 2,7 2,7 2,7 4,1 7,4
Evaporation thermal energy kWht 16 24 31 47 94
Condensation thermal energy kWht 16 24 31 47 94
Dimensions (L x W x H) mm 2400 x 1670 x 2600 2800 x 1760 x 2680 3570 x 1970 x 2715 4230 x 1990 x 2965 4880 x 2450 x 3546