The causes of coking in electric heaters

The causes of coking in electric heaters

1. Quality of thermal oil heater

After analyzing the formation process of coking mentioned above, it was found that the oxidation stability and thermal stability of the thermal oil furnace are closely related to the coking speed and quantity. Many fire and explosion accidents are caused by the poor thermal stability and oxidation stability of thermal oil furnaces, which cause serious coking during operation.

2. Design and installation of heating system

The various parameters and equipment installation provided by the heating system design directly affect the coking tendency of the thermal oil furnace. The installation of each device is different, which can also affect the lifespan of the thermal oil furnace. The equipment installation must be reasonable, and timely rectification is required during debugging in order to prolong the service life of the thermal oil furnace.

3. Daily operation and maintenance of heating system

Different operators have varying levels of control over factors such as temperature and flow rate in the heating system, even when using the same heating equipment and electric heating oil furnace, due to differences in objective conditions such as cultural level and technical level. Temperature is an important parameter for thermal oxidation and polymerization reactions in thermal oil furnaces. As the temperature increases, the reaction rate of these two reactions will sharply increase, and the tendency for coking will also increase accordingly

1, Pipeline electric heater interruption

In the case of a cut off in the pipeline electric heater, if the temperature control of the pipeline electric heater is controlled by the outlet temperature, the sensor signal cannot provide the correct signal, and heating is always required, the pipeline electric heater becomes increasingly hot. If the over temperature sensor operates, the power can also be cut off. If the over temperature sensor does not operate, the electric heating element may be burned out, or the container may crack or melt. Regardless of this situation, in explosion-proof situations, They may all produce unexpected results.

2, Over temperature sensor positioning error

If one circuit of the pipeline electric heater is not heated and the other circuits are heating, the over temperature sensor cannot detect the correct temperature if the sensor is positioned close to the pipeline electric heater

3, Wiring error of over temperature sensor

When multiple pipeline electric heaters are used together on the same pry block, it may result in wire misalignment and crossing.

4, Cracking of electric heating elements

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