Causes and treatment methods of carbon deposition in thermal oil heating pipes

Water heating tubes are prone to scale buildup, and thermal oil electric heating tubes are prone to carbonization, presenting significant challenges for industrial users. Today, we'll share the causes of carbonization in thermal oil heating tubes and how to prevent it.

Carbonization in thermal oil heating tubes is primarily caused by excessively high oil temperatures, which lead to carbonization. Furthermore, high surface temperatures in the heating tubes can lead to localized overheating of the oil on the heating tube surface, resulting in carbon deposits.

So, what measures can be taken to prevent carbonization?

1. First, considering the heating tube itself, it's generally recommended to minimize surface load (ideally, the power per meter of heating tube should be kept within 1.5-2 kW/m). This will lower the surface temperature of the heating tube.

2. The heating tube itself can be made of medium-carbon steel, high-carbon steel, stainless steel, or treated with an anti-scale coating. This not only significantly prevents scale buildup but also helps prevent carbonization.

3. Choose high-quality thermal oil.

4. Optimize the flow rate of the pump in the thermal oil heater. A faster flow rate reduces the possibility of localized overheating of the thermal oil.

5. When the thermal oil heater stops operating, first cool it to room temperature to avoid high-temperature shutdowns. This is because the surface of the heating element remains hot at the moment of shutdown. If the thermal oil inside the element stops flowing, it can cause localized overheating on the surface, leading to carbon deposits.