As the core component of vacuum flashing salt-water separation device,
vacuum evaporator has become a research focus in recent years.
Dan Zhang [6] investigated static flash evaporation of NaCl solution
when the superheat degree was between 1.7 and 53.9 K. Itwas reported
that vapor quality is improved with the increasing initial solution
height, while the vapor production per unit mass of NaCI solution decreased,
because the increasing static pressure of bottom liquid restrains
the flash process. Besides, it was also found that vapor quality
is increased linearlywith increasing the superheat degree. Furthermore,
through adopting the spray flash evaporation method proposed by O.
Miyatake et al. [7–8], A. Günther [9] and SamiMutai [10] injected atomized
liquid spray into the low pressure environment to accelerate the
flashing process. The interaction between the flash and liquid atomization
was studied, which indicates that flash intensifies the atomization
effect and reduces droplets' size even when the superheat degree was
relatively small. Consequently, the flash evaporation rate and ratio are
improved and the non-equilibrium temperature difference is reduced.
However, the researchers [9,10] focused on improving the conversion