DIRT EVALUATION METHOD OF HEAT EXCHANGER, AND DIRT EVALUATION DEVICE OF HEAT EXCHANGER

摘要

To provide a dirt evaluation method of a heat exchanger capable of rapidly and certainly evaluating the adhesion of dirt on a preheating-based heat exchanger.SOLUTION: In a dirt evaluation method of a heat exchanger, a raw oil is fed from any one selected from a plurality of raw oil tanks, and is sequentially heated by a plurality of heating heaters whose heating units are disposed in a circulation pipe of the raw oil. The temperature of each heating unit is set by temperature setting means disposed in each heating heater, and the temperatures of the raw oil at the raw oil inlet and raw oil outlet of the heating heater are measured.SELECTED DRAWING: Figure 1