What is the classification of burner for gas-fired or oil-fired boiler from the perspective of structure?

From the perspective of structure, there are two kinds of burner used by boiler that are split gun type burner and integrated gun type burner.

The split gun type burner consists of main engine, fan, oil pump group and control components with large volume and large output power. It usually adopts gas ignition system and does not have high requirements for fuel quality and environment.

On the contrary, the integrated gun type burner is characterized by small volume, small regulation ratio and low costs, but it also puts forward higher requirements on fuel quality and environment.