What is a common device used to introduce pulverized coal into a boiler for efficient burning?

A burner is the common device used to introduce pulverized coal into a boiler for efficient burning because it is specifically designed to create an optimal mixture of fuel and air. The burner atomizes the coal, ensuring that it is finely pulverized and evenly mixed with the air to facilitate complete combustion. This process results in improved energy efficiency and reduced emissions.

In a boiler system, efficient combustion is essential to maximize energy output and minimize pollutants, which is why the design and functionality of the burner are crucial. Properly functioning burners help ensure that the coal is ignited and that the heat produced is adequately transferred into the water or steam within the boiler, thereby driving the power generation process.

Other options are related to different functions in the energy generation process. A steam generator converts water into steam, but it does not introduce fuel. An electrostatic precipitator removes particulate matter from flue gases, while a heat exchanger is used to transfer heat from one medium to another. Neither of these devices is responsible for fuel injection into a boiler.