The CycloVap*
system works differently to other evaporator systems as it introduces
the feed wastewater to the heating tubes in a very unique way. The
Inline Swirl Generator (ISG*), another patented ACQUA product, imparts
a very high tangential swirl on the incoming feed which causes the
liquid to be distributed inside the heating tubes as a very thin
film.
The film is able to heat very
rapidly with minimal temperature difference due to the high heat
transfer coefficients created by the very thin film rotating at
high velocity. The heat transfer is further aided by the re-circulation
of the non-vaporized liquid from the bottom of the heating tube.
From the heating chamber, the
partially evaporated liquid is fed to the separation chamber where
it 'flash' evaporates. An overhead duct allows the vapours to be
released while the concentrate is pumped away.
To increase system efficiency,
the vapour from the first "effect" can be passed to a
second "effect" to be used as the steam heating medium.
This allows the CycloVap* to develop multiple effects or optionally,
employ the use of Mechanical Vapor Recompression.
Mechanical Vapour Recompression
allows the CycloVap* to utilize the vapour generated through the
evaporation process, and recompress it to form high pressure steam.
Hence, the CycloVap* is much more energy efficient, through the
creation of little or no fresh steam, and by using significantly
less power in the process.
Finally, the steam vapour is
condensed in the heat exchanger shells. If water purity is an issue,
the mixture can be passed through a carbon filter. This allows for
the reuse of the water, which again underlines the economic and
environmental advantages of this system. The other output stream
is the concentrate, which can be reprocessed or removed depending
on the application.
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