| 摘要 |
PURPOSE:To remove scales from a heating surface and to discharge the scales as dried powder without generating cleaning waste liq. by supplying hot water to the heating surface deposited with scales from a waste liq. supply port and vaporizing the water. CONSTITUTION:The concd. waste liq. is introduced from the waste liq. supply port 14 and distributed onto the heating surface 17 by a distributor 15. THe distributor 15 consists of a rotating shaft 18 and a movable blade 19 on the shaft 18. When pulverization is carried out, scales are deposited on the heating surface 17. Accordingly, hot water is supplied from the waste liq. supply port 14 to dissolve the deposit on the heating surface. In this case, the flow rate of hot water is controlled so that the hot water is vaporized before the water is discharged from the device and the deposit is discharged from the bottom of the device as dried powder, the supply flow rate of the hot water is made higher than that of the concd. waste liq. during concd. waste liq. treatment or the temp. of the heating surface is made lower than that during concentration, and the hot water is vaporized before being discharged. |
