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APSI has engineered a unique R-Vap Mechanical Vapor Recompression (MVR) wastewater evaporator that operates at a fraction of the cost of traditional waste water evaporator treatment systems.
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Mechanical vapor recompression evaporators re-use the energy from the steam they create, thus eliminating the need for an outside source of heat and cooling. A compressor is used to boost the pressure of steam from the evaporator so that it will condense at a higher temperature. This boost enables the latent heat in the steam to be returned to the evaporator, thus generating more steam. Therefore, the same heat is continuously reused. With power being the only utility, the major operating expense of a MVR evaporator is the mechanical energy required to operate the compressor.
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Click on image to enlarge
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Low Cost Operating Cost
Ordinary waste water evaporators are notoriously expensive to install and operate. For many evaporators, to process the wastewater and also create re-usable distilled water, costs include natural gas or steam utility streams and a method of condensate recovery or cooling. The later typically involves operating a cooling tower or large air-cooled heat exchanger. When both heating and cooling equipment are considered, the installation and operation of a traditional evaporator is a major undertaking.
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R-Vap systems require from $0.01 to $0.02 per gallon of water evaporated. This cost will depend on the efficiency of the heat exchanger and compressor, the degree of concentration required of the evaporate purge stream, and electrical cost. (Electrical cost by state)
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Unique Steam Compression Technology
APSI Inc. has pioneered the use of an off-the-shelf compressor with only one moving part.* Unlike other MVR supplier technology, this compressor is extremely reliable since it is not a close tolerance or high speed machine. The APSI compressor also has the advantage of low noise.
*APSI MVR Evaporator at Products Finishing Online
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Sizing
In addition to a novel steam compression technique noted above APSI utilizes a standard shell-and-tube exchanger that is available both in stainless steel and titanium. We have developed a standard design that can be modified to evaporate from 20 to 2000 gallons per hour of water. We can also scale the design for larger sizes upon request. Vapor body and piping can be constructed from a variety of materials including stainless steel, fiberglass reinforced plastic, or titanium.
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Size
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Width (ft)
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Height (ft)
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Depth (ft)
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20 gph
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8
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12
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6
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180 gph
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12
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14
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8
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750 gph
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16
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17
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11
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2000 gph
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20
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22
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15
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Sizes are approximate and only for single effect
Larger sizes and multi-effect units are available
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Typical Applications
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Units available in sizes from 20 gph to 2,000 gph.
Pilot Unit Available
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