Belleville boiler

The Belleville boiler is developed by the French engineer Julien Belleville in 1850 Boiler type. This type of boiler has been widely used in the late 19th and early 20th century, first by the French Navy, and later in other countries, used to drive steam ships and stationary steam engines.

From the boiler construction company of the inventor later came the automobile manufacturers Delaunay - Belleville.

Design and operation

It is a water -tube boiler, in which the (initially cast iron, later drawn, steel ) evaporator tubes are approximately horizontally out (about 3 ° inclined ) through the furnace above the grate. Two superimposed pairs of tubes are connected laterally outside of the combustion chamber via a small water chamber, so that overall a series of layers formed in a zig - zag arrangement. About the evaporator part is the side the drum, over which at later types, a feedwater heater, also with horizontal tubes connecting.

As water -tube boilers, the boiler had over the at that time very popular shell boilers the great advantage that in case of failure of the pressure shell only a single pipe was affected, so it did not come to a boiler explosion, which represented a major step forward for the safety of the boiler operation.