Atmospheric evaporators and distillation systems ENVIDEST EA are designed to provide a low investment cost method to minimize liquid wastes when it is not possible to reuse or discharge the water due to the absence of a point of discharge. In this case, water vapor is not condensed and it is released into the atmosphere.
The operating cost may be very high since much energy can be used for evaporation. In some cases, when cheap or spare thermal energy is available (biogas, hot water, etc.) it is a good system to make the most of.
The range of atmospheric evaporators comprises devices with a production capacity from 35 to 1,500 L/h. These evaporators can be heated by biogas, natural gas, propane, steam, kerosene, residual oil or electricity.
Volatile substances can cause emission problems when these react with the water vapor. This point must be taken into account before installing an atmospheric evaporator device and to request a prior authorization to the competent environment authority to verify the procedure sustainability.
Atmospheric evaporators are mainly used in the concentration of:
- Recovery of high value chemical products in wash-outs during surface treatment processes, metallic coatings and aluminum anodizing.
- Reduction of photographic liquid waste.
- Concentration of saline solutions (rejection, decalcification, reverse osmosis).
- Residual food brines (pickles, olives, etc.).
- Concentration of landfill leachates.