There are various reasons for the ignition of thermal oil, mainly including the following aspects:

1、 Equipment malfunction and improper operation

1. Overtemperature and overpressure operation:

Thermal oil boilers operating under conditions of overheating and overpressure may cause coking in the pipelines, leading to tube rupture. The leaked heat transfer oil entering the furnace or open flame area is highly prone to fire or explosion.

2. Leakage at connection points such as flanges and valves:

If there is leakage at the connection parts such as flanges and valves or at the sealing points in the system, and it is not repaired in time, the leaked heat transfer oil may encounter open flames and cause a fire.

3. Leakage in pipeline insulation layer:

If the thermal oil leaks into the insulation layer of the pipeline and is not detected in time, the accumulated oil will gradually oxidize, producing low self ignition point components, ultimately leading to self ignition.

2、 Materials and Chemical Properties

1. Mixing of thermal oil with heated material:

In some chemical enterprises, the heated materials may contain oxidants or active catalysts. If thermal oil leaks into these materials, it may cause severe combustion or even explosion.

2. Oxidation of thermal oil:

In an open system, when the temperature in the high-level tank is too high, the heat transfer oil is prone to oxidation when it comes into contact with air. Partial oxidation products may have spontaneous combustion, leading to fires.

3、 Moisture and Pollution

1. Moisture mixed into the thermal oil system:

If water is mixed into the thermal oil system, its volume will rapidly expand after vaporization, which may cause overpressure and fuel injection. High temperature oil spray may cause personal injury, fire, or explosion.

2. System pollution:

Poor quality or over temperature operation of thermal oil may lead to early aging and the production of a large amount of insoluble carbon particles. These charcoal particles may deposit at the bottom of the drum or on the pipe wall, causing overheating or damage to the seals, which can lead to leakage and fire.

4、 Other factors

1. Sudden power outage:

Sudden power outages may cause the heat transfer oil to stagnate and overheat inside the furnace tube, leading to a fire.

2. Hot oil pump malfunction:

When the hot oil pump fails to operate normally, runs idle, or cannot generate pressure, the heat transfer oil may remain in the system and overheat, increasing the risk of fire.

3. Improper use of filters:

Improper use of filters may result in coking and adhesive substances not being filtered out, depositing on the bottom of the pot or pipe wall, causing overheating and triggering fires.

In summary, the causes of thermal oil fire involve multiple aspects, including equipment failure and improper operation, material and chemical properties, moisture and pollution, and other factors. To ensure the safe operation of the thermal oil system, regular inspections and maintenance of the system should be carried out to promptly identify and address potential safety hazards. At the same time, operators should receive professional training to understand the working principles and safety operating procedures of the thermal oil system, in order to reduce the occurrence of fire accidents.

Diphenyl ether manufacturer diphenyl ether Shandong