Self-ignition of Coal
Coal is an important source of energy around the world due to its wide availability and low cost. However, coal can also be dangerous due to its tendency to self-ignite. Self-ignition of coal is caused by the presence of volatile matter and oxygen in the coal and can lead to serious fires and explosions.
In the mining industry, self-ignited fires can be extremely hazardous. Coal seams that are not properly sealed after mining can be vulnerable to atmospheric oxygen and become flammable. Self-ignited fires can also occur in coal silos and bunkers due to air infiltration, leading to potential explosions and property damage.
In power plants, self-ignition can occur due to the presence of unreacted volatile matter which has not been burned off and can lead to fires in the system. For this reason, the coal that is used for power generation must be carefully monitored and tested for volatile content to prevent the formation of explosive gases.
To prevent the self-ignition of coal, a variety of techniques can be employed. One of the most effective techniques is to store coal in a dry and dry space and ensure the environment is suitable for only combustion of the coal, making it difficult for the volatile matter to form. Additionally, sealing of coal seams and bunkers is essential to prevent air infiltration and therefore the formation of explosive gases. Additionally, coal that is to be used in power plants must be tested and carefully monitored for volatile content to prevent fires and explosions.
Finally, a variety of treatments can be used to prevent coal from self-igniting. For example, a chemical known as zirconium oxychloride can be applied to the surface of the coal, creating an inert barrier that prevents the formation of flammable vapors. Additionally, thermal treatments, such as steam and hot air, can be used to further reduce the volatile content of coal. These treatments must be carefully monitored, however, as the temperature of the coal should not be allowed to exceed the level of combustion.
Self-ignition of coal can be dangerous and must be taken seriously. By utilizing proper storage and treatment techniques, as well as careful monitoring and testing, the formation of explosive gases and the risk of fires and explosions can be minimized. This will ensure that coal remains a safe and reliable source of energy for years to come.
