Mechanical Vapor Compression systems differs from reverse osmosis because of the ability to make clean water from saturated or even crystallizing brines with TDS up to 650,000 mg/L.
Reverse osmosis system are usually used to make clean water from sources no higher in TDS than approximately 50,000 mg/L. For economic reasons, evaporators are seldom operated on low TDS water sources. Those applications are filled by A.B.E. reverse osmosis systems. The already brackish water which enters an A.B.E. evaporator is concentrated further. The increased dissolved solids act to increase the boiling point well beyond that of pure water.
How do MVR's Work?
To very briefly summarize, Mechanical Vapor Recompression (MVR) is an evaporation method by which a blower, compressor or jet ejector is used to compress, and as a result of the compression, increase the temperature of the vapor produced.
As a result, the vapor can serve as the heating medium for its "mother" liquid or solution being concentrated. Without the compression, the vapor would be at the same temperature as its "mother" liquid/solution, and no heat transfer could take place.
The efficiency and feasibility of this process depend on the efficiency of the compressing device (e.g., blower, compressor) and the heat transfer coefficient attained in the heat exchanger contacting the condensing vapor and the boiling "mother" solution/liquid. A.B.E.’s Patented Heat Exchanger overcomes the issues associated with conventional MVR’s, to increase overall efficiencies and improve the economics of this wastewater treatment approach.
What makes the ABE MVR Better?
We have developed and patented a new design and method of fabricating the principle heat exchanger required for MVR type applications, and for maximum energy recovery from the mother liquor or MVR waste stream.
The design changes the economics of MVR based evaporation, by substantially reducing the Capital & Operating cost.
RO reject recovery