The superheat is the key factor for liquid drop to keep evaporating and it determines the water separation rate of the solute/water separator. A solute/water separation device combined with high efficient heat pipe and solid adsorption technology is developed in this paper. Water separation experiment of NaCl solution with concentration of 3% is conducted and the results show that the heat pipe can rapidly transfer heat to the drop just flashed for the second boiling with high heat flux and increase the water separation rate per unit volume. During the front half part of the adsorption process

the evaporator pressure value has a significant decrease by 0.4-1 kPa than that without adsorbent bed. Namely

the boiling point of drop is reduced and superheat is increased. This provides a new method for utilizing lower grade heat source in the solute/water separation.