| 摘要 |
PURPOSE:To provide a safe waste heat recovery device adapted to prevent the overheat of hot water even with a temperature load being disappeared, by adjusting the feed rate of heating medium to be fed to a heat exchanging section. CONSTITUTION:A heating medium solution is sprayed through a spraying tube 17 and fed to a heating tube 14 during a normal operation. Then, the heating medium is converted into a gaseous phase as the heating medium gas and rises upwardly inside a shell 13. After entrance into a condenser 12, the heating medium gas is cooled down in contact with the hot water of hot water 2 to condense and settle inside a heating medium solution reservoir 15. The heating medium solution is then sprayed again for its recirculation through a flow adjusting valve 18 and conduit 16. The hot water of hot water tube 2 is discharged as a heated and hot water. The temperature of hot water increases at the outlet as the hot water load diminishes, which is detected by means of a temperature detector 19 to control the flow adjusting valve 18 to keep the outlet temperature of hot water in a predetermined range. For example, the flow adjusting valve 18 is controlled to reduce the feed rate of heating medium to a small level, when the hot water load decreases. In turn, the valve 18 is completely closed, when a load disappears completely, whereby reducing to zero the feed rate of heating medium to the heating tube 14 for eliminating the heat recovery capability. |
