Vacuum Evaporators with scraper 250-3.000 l/d VR-HP
Heat pump vacuum evaporator fit to concentrate water based solutions. High-efficiency immersed heat exchanger. Built-in upper condenser. Full automatic operation system by PLC; display of main parameters by LCD screen.
Standard manufacturing AISI316 – special alloys on demand. Range from 250 to 3000 l/day of evaporated water.
The system consists of a vacuum autoclave (residual pressure 6,5 kpa) divided in one boiling section (2) for the evaporation of the wastewater at low temperature (30°C), and one condensation section (5).The circuit of the heat pump consists of a compressor at electric driving (1) that compresses the freezing gas Freon at 60°C into the outer lined exchanger, causing the ebullition and the evaporation of the water. On leaving the exchanger, the gas flows through the undercooler (3) and vaporizes by an expansion valve (4) into the condensation coil (5). During the expansion process, the gas absorbs heat making it possible the condensation of the steam risen through the central chimney. The extraction pump (7) extracts the condensed steam stored in the vacuum service tank (8). A pump, once achieved the set concentration, without working interruptions, automatically discharges the residual concentrate.
The non-stop scraping action by scraping shovels on inner side (10) keeps always clean the surface of thermal exchange and avoids encrustations that could compromise the good working of the concentrator. This perpetual motion and the structure of the surface of thermal exchange allow achieving of high concentrations.
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