In order to maintain the low pressure during the flash evaporation,
steam generated in the evaporator must be transferred into liquid
form quickly. Compared to the traditional direct condensation using
cooling water, solid adsorption technology can dramatically reduce
the steam pressure to a lower level in the system. Its potential in desalination
has attracted wide attention in recent years.National University
of Singapore made some remarkable achievements on the application of
solid adsorption in desalination [15–18]. Solid adsorbent was introduced
into the process to replace the traditional condensing system,
which lowers the evaporation temperature to 4–5 °C. Based on that,
they remarkably reduced the condensing pressure and increased the
stage number of MED (Multi-effect Distillation) to achieve 1.5–2 times
of the water producing ratio.