Coal types and boiler efficiency

The combustion characteristics of different types of coal

Combustion is the main chemical reaction process of coal combustion, and different types of coal will produce different combustion characteristics during combustion. For example, during the combustion of anthracite, the combustion reaction rate is fast, the calorific value is high, and the thermal efficiency is also high, but the generated SO2 emissions are relatively high; During the combustion of bituminous coal, the ash content is relatively high and the calorific value is relatively low, but it can produce higher reaction heat and fewer emissions.

The impact of coal types on boilers

1.  1）Boiler thermal efficiency

     When burning coal, the heat energy generated by combustion is transferred to water/steam, which in turn drives a turbine to generate electricity. The combustion characteristics of different types        of  coal will affect the coal consumption and thermal efficiency of boilers. Anthracite coal has high thermal efficiency and low energy consumption, making it particularly suitable for large boilers;           However, bituminous coal requires the use of coal with low ash content to achieve the same thermal efficiency.

2）Emissions

     The combustion of coal in boilers also generates some waste gases, solid and liquid waste, including SO2, carbon dioxide, ammonia, nitrogen oxides, etc. Different types of coal emit different types       and quantities of substances during combustion. Choosing appropriate coal can reduce harmful substances emitted by boilers, reduce environmental pollution, and increase boiler lifespan.

How to choose the appropriate type of coal

1. 1）Understand the characteristics of coal types and choose based on the characteristics and requirements of the boiler.

2. 2）Regularly inspect the condition of the boiler, flue, and furnace, and clean and maintain them as needed to maintain the efficient operation of the boiler.

3. 3）Pay attention to environmental requirements, choose low emission coal types, and comprehensively consider the process flow, combustion method, environmental requirements, and economic benefits.

The variety of coal has a significant impact on boilers, and selecting the appropriate type of coal can effectively improve the thermal efficiency of boilers and reduce pollution emissions. Choosing the appropriate type of coal requires comprehensive consideration of multiple factors and the development of scientific and reasonable plans and measures to ensure the efficient and stable operation of the boiler.