| 摘要 |
<p>A liquid being processed, such as nonaqueous solvents and the like which contain dirty components, is heated and evaporated under reduced pressure in a distillation still (1) having a heating mechanism (4) which uses a heat-resisting oil as a heating medium. Vapor of the nonaqueous solvents is condensed and liquefied in a condenser (19). A condensed and liquefied distillate is circulated through a moisture separator (31). The interior of the distillation still (1) is reduced in pressure by an ejector (34) provided in a distillate circulating system to be in a predetermined condition of reduced pressure. Residue remaining in the distillation still (1) is discharged into a liquid storage tank (22), which is connected to the distillation still (1) via a waste fluid pipe (21) provided with an opening and closing valve (53) and is connected via a conducting pipe (54) to have the pressure of the tank reduced to a similar level to that of the distillation still (1), and is cooled in a cooler (48). In this manner, a liquid being processed, such as nonaqueous solvents and the like which contain various dirty components, can be efficiently recycled.</p> |
