Evaporators

In many cases, the application of an industrial evaporation process would allow to obtain a substantial reduction in the volume of the
effluent and also the possible recovery of the salts and of the raw materials contained in it in solution.

The evaporation systems proposed by Ecodepura, are based on the combination of two innovative technologies that allows a remarkable ease of installation and energy savings: the heat pump and the vacuum.
The "heat pump" evaporators are available in various models with capacities up to 9.000 liters / day.
For higher flow rates may use other sources of energy such as steam, the hot water or other process fluid, solutions with simple or multiple stage, or form the batteries composed of multiple devices of  heat pumps.
The load of the liquid and the discharge of the concentrate and distillate are automatic; all functions of the machine can be programmed by PLC.

Evaporators are completely autonomous installations, which do not require particular maintenance and also operate continuously 24 hours 24 without the presence of an operator.

These machines can be used directly for the treatment of polluted wastewaters, or be used as components of more complex systems
(for example, for the concentration of the eluates in the regeneration of resin plants, or from osmosis and ultrafiltration systems).

The devices appear as rational  and compact units, and are particularly suitable for:

  • Concentrate and purify waste water or process
  • Desalt seawater or brackish water
  • Treat oil emulsions
  • Treat chromium plating baths
  • Recovering metal salts and raw materials in solution
  • Produce demineralized water


Application fields:

  • Galvanic industry:
    • Recovery of metals (chromium, copper, nickel) from the wash water
    • Concentration of exhausted baths (degreasing, pickling)
    • Concentration of eluates from regeneration of resin plants

  • Die casting facilities:
    • Concentration of waste from proces (release agents, glycols, lubricants)

  • Mechanical processing:
    • Concentration of oily emulsions
    • Concentration of discharges from vibratory finishing proces
    • Concentration of exhausted washing water
 
  • Thermal treatments:
    • Recovery of quenching salt 
    • Purification of cooling  water 
 
  • Painting facilities:
    • Concentration of water from spray booths
    • Solvent recovery
    • Concentration of waste from phosphodegreasing bath
 
  • Arts and Photography:
    • Concentration of developing and fixing baths
    • Concentration waters for washing frames and printing cylinders 
    • Recovery ink from washing water
 
  • Dyeings:
    • Collection and concentration of dyes
 
  • Pharmaceutical, chemical, cosmetics
    • Concentration of liquid from processing and washing reactors
 
  • Goldsmith's:
    • Concentration water by ultrasonic cleaning, pickling and hand washing
    • Gold recovery from wastewater
 
  • Herbals production:
    • Recovery of solvents used in the extraction
 
  • Oil mill:
    • Treatment of waters from crusher
 
  • Landfill sites:
    • Treatment of percolates
 
  • Rubber processing:
    • Recovery of vulcanization salts
 
  • Enology:
    • Concentration of grape must
    • Desulphurisation
 
  • Dairy products:
    • Recovery of protein from milk whey
 
  • Alimentary productions:
    • Collection and concentration of sugar solutions
 
  • Meat factory:
    • Concentration of processing broths 
    • Recovery of fats and jellies
 
  • Feed producers:
    • Recovery of feed supplements from wastewater



Principle of operation:
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The principle applied is boiling in vacuum coupled to a heat pump.
The system consists of an autoclave kept under vacuum within which are located the boiling section where evaporation of the product takes place  at low temperature (25/35 ° C) and the condensation section.
The circuit of the heat pump is kept in motion by an electrically driven compressor which compresses the refrigerant gas to a temperature of about 60 ° C in the heat exchanger, causing boiling and the consequent evaporation of the liquid.
Leaving the heat exchanger, the gas passes through the subcooler and subsequently vaporizes, through an expansion valve, in the condensing coil.
During  the expansion  process the gas absorbs heat and makes possible the condensation of the vapor ascended through the central chimney.
The condensed steam which collects on the bottom of the chamber is extracted by a pump and accumulated in the storage tank.
The sludges are drawn by a pump automatically, or removed manually once it's reached the predetermined concentration.