AQUA FELIX™ Wastewater Recycling using vacuum evaporation technology
To resolve efficiency and definitively the problem of industrial polluted water disposal, concentrating as much as possible the contaminating product and recovering the water that, distilled, can be reused in the next production cycles.
Restrictive anti-pollution rules and the environmental conscience more and more widespread impose a new way to deal with use of natural resources and their disposal. Recycling of raw materials and strong reduction of residue to treat are the last conquest of industrial research for the environmental protection. The treatment of contaminated water, in particular, more and more techniques have developed, allowing the design of zero discharge plant.
To get the maximum yield with the low energy consumption we exploit the technology of heat pumps, of vacuum distillation, of forced circulation heating and of multi-effect heat exchanges.
1st Stage: Concentration of waste waters (lowering of its volume typically until 1/3 even 1/4 of the original)
Heat pump vacuum evaporators
By exploiting the technologies of heat pump and vacuum distillation a maximum yield can be achieved with low energy consumption. Under vacuum the boiling point of water can be reduced to 35-40 °C , using heat pump technology the same circuit is used for heating and cooling and the amount of energy required is reduced considerably. Vacuum evaporators easily separate oily emulsions producing a highly purified distillate and a concentrated oily residue ready for disposal.
Vacuum evaporation is suitable for numerous wastewater applications other than oil emulsions, and it´s used in many industries including metal treatment, printing, painting, surface treatment, degreasing, etc. They can remove suspended solids, heavy metals, colour pigments and other non volatile products producing a distillate that in most cases can go the sewer system without further treatment, in compliance with local regulation.
2nd Stage: Wastewater concentration into dry residue (typically up to 1/20 as much as 1/50 of the original volume)
Discoid distillers of wastewaters with dry solid residue output
The “RENEMDISC” discoid wiped film distillers enable recycling of the concentrated wastewaters from the 1. Stage. (processing of the liquid residue-sludge).By exploiting the simple distillation process the mechanical impurities, solids and other non volatile components are separated from the processed liquid in dry residue form. Its volume is typically 1-5 % of the original , it is easy to handle and store. Moreover , in some cases we can obtain even marketable material.
The boiling of the sludge is effectuated by heated disc, filled with thermic oil. The oil can be heated by electrical thermo-elements or some other external source of heat. The water vapours are led into the air- or water-cooled condenser. The condensed distilled water is collected in a suitable reservoir in order to re-use it in the production process or it can be poured into the sewer system without further treatment.
The elimination of massive water volumes to treat avoids logistic problems related to their storage and transport and the related expenses.