Which of the following is a type of internally fired boiler?

The Scotch Marine boiler is a type of internally fired boiler characterized by its design, which includes a primary firebox that allows the flames and hot gases to pass through the tubes. In this design, the furnace is located inside the boiler shell, providing efficient heat transfer from the combustion gases to the water inside the boiler. This design also facilitates a compact form factor and is known for its relatively high steam production capacity.

Internally fired boilers, such as the Scotch Marine, can maintain higher pressure levels and have enhanced safety features compared to externally fired designs. Their construction typically allows for better efficiency and a reduced footprint, making them suitable for various industrial applications.

Understanding the features of the Scotch Marine boiler helps recognize why it fits within the category of internally fired boilers, wherein the fire and heat sources are integrated into the boiler structure itself.