What problems will occur in the use of thermal oil furnace?

With the increasing use of thermal oil boilers, problems are constantly emerging. Problems with thermal oil boilers can pose significant risks, so it's important to learn how to use them safely and master certain solutions. Today, Dianrehui will explain how to troubleshoot thermal oil boiler problems.

1. Bumping and Oil Spraying:

This typically occurs when the hot oil contains water, causing it to heat up and cool down too quickly. The solution is to lower the boiler's temperature. In severe cases, an emergency shutdown is required.

2. Bulging and Tube Bursts:

Poor oil quality and excessive residual carbon content can cause oil spraying and fire when heated to 1000°C. Water vaporization can generate high pressure, leading to overpressure and explosion. Furthermore, excessive residual carbon content in the oil can cause chemical reactions during heating, forming small amounts of polymers. Localized overheating can also lead to coke formation. These polymers and residual carbon become suspended in the oil, as they are insoluble. These substances can deposit at the bottom of the tubes, overheating, encapsulating them, and eventually accumulating on the tube walls, causing overheating. Therefore, regularly sample and analyze the thermal oil to monitor changes in oil quality, analyze the causes of these changes, and regularly replenish the oil to maintain a stable carbon residue. Thermal oil added to the boiler must be dehydrated beforehand, and appropriate measures must be taken immediately if any problems are detected.

3. System Vibration and Pressure Instability:

This is typically caused by gas or moisture in the system. The solution is to vent the system and boil the oil.

4. Large Inlet and Outlet Temperature Difference:

This typically occurs when the furnace temperature is high and the load is low, leading to a thermal oil circulation failure or overload. The solution is to lower the furnace temperature, troubleshoot piping and equipment failures, reduce the load, and adjust the bypass.
5. Boiler Leakage:

Due to welding quality issues, the heat transfer monitor can vaporize significantly if the weld seam partially breaks or overheats, causing pipeline vibration or even damage, leading to large amounts of thermal oil leakage. Thermal oil is highly permeable, and leaks, especially around flange gaskets, often cause fires. Therefore, select a qualified installation company for installation. Pipe connections should preferably be welded, and flange connections should be properly supplemented. Screw connections must not be used. Flange gaskets should be made of high-strength graphite that is oil-resistant, pressure-resistant, and high-temperature resistant. All accessories that come into contact with the heat transfer medium should not be made of non-ferrous metals or cast iron. Before igniting the boiler, all pipes, valves, etc. should be pressure-tested by the boiler supervisor and installation company until the boiler is leak-proof. The heat transfer oil should not be circulated in the system piping for more than 60 minutes, and ignition can only be performed after normal operation.