How many furnaces do D type boilers have?

D type boilers are designed with a specific configuration of their combustion systems. They typically feature a single furnace. This furnace is positioned vertically and is known for its efficient heat transfer capabilities, which is one of the reasons these boilers are commonly used in marine and industrial applications.

The design allows for a compact layout while accommodating a relatively large steam generating capacity. A single furnace in the D type boiler means that the design focuses on maximizing the heat exchange between the combustion gases and the boiler water, improving the overall thermal efficiency.

This is in contrast to other types of boiler configurations, such as the water tube or fire tube designs that may have multiple furnaces or incorporate different arrangements for the combustion process. The clear identification of a single furnace in D type boilers helps ensure that they are understood correctly within the context of marine engineering and boiler operations.