If the temperature of the heat transfer oil does not go up, you can check from the following points:
First, whether there is a problem with the heating surface in the heat-conducting oil furnace , whether there is a problem such as coking, which affects the heat exchange effect;
2. Whether the heat load value exceeds the design value. If the heat load value exceeds the design value, it is difficult to increase the temperature under the rated heat input and flow cycle conditions.