Understanding the working principle and application scenarios of coal-fired boilers
1, The way it works
A coal-fired boiler is a device that uses coal as fuel to convert the heat generated by its combustion into steam or hot water. Its working principle is roughly as follows: coal powder or combustion coal blocks are put into the combustion chamber and mixed with air or oxygen for combustion at high temperatures, producing high-temperature flue gas. These flue gases will undergo cooling, dust removal, and other treatments before entering the heat exchanger for heat exchange with water or secondary circuits, converting thermal energy into steam or hot water. Finally, the adjusted steam or hot water is sent to the required industrial or civilian facilities for use.
2, Classification
According to different combustion methods, coal-fired boilers can be divided into two categories: direct combustion boilers and indirect combustion boilers. Direct fired boilers adopt the method of direct combustion of coal blocks, which is suitable for situations with good coal quality and high combustion efficiency; Indirect combustion boilers, on the other hand, use fuels with lower ash content such as coal powder or charcoal powder for combustion, resulting in higher combustion efficiency but more complicated ash residue treatment.
3, Advantages and disadvantages
The reason why coal-fired boilers are widely used is that they have certain advantages: fuel prices are relatively stable, universal, and easily available; The equipment cost is relatively low; Easy to operate and maintain. However, there are also some drawbacks, such as the gas generated by combustion causing environmental pollution and low combustion efficiency, which limit the application scope of coal-fired boilers.
4, Application scenarios
Coal fired boilers are widely used in fields such as power generation, heating, and industrial production. For example, some industries such as manufacturing plants, mines, and steel mills require a large amount of thermal energy supply, and coal-fired boilers can be used as the main heat source equipment; During the winter heating season, coal-fired boilers can also be used as the main heating equipment in thermal power plants.
