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A steam drum is used without or in the company of a mud-drum/feed water drum which is located at a lower level. A boiler with both steam drum and mud/water drum is called a bi-drum boiler and a boiler with only a steam drum is called a mono-drum boiler.
These water treatments often include compounds forming a sludge to entrap such particles; and boilers intended for such water treatment include a structure called a mud drum at the lowest part of the boiler. Bottom blowdown involves periodically opening valves in the mud drum to allow boiler pressure to force accumulated sludge out of the boiler.
Water drum see mud drum Water-tube boiler a boiler whose primary heating surface is composed of many small tubes, filled with water. Tubes of 3 inch diameter and above are termed "large-tube" boilers. Later water-tube designs used smaller "small-tubes" of 2 inches or less. Wet bottom furnace
The drums are linked by straight watertubes, allowing easy tube-cleaning. This does, however, mean that the tubes enter the drums at varying angles, a more difficult joint to caulk. Outside the firebox, a pair of cold-leg pipes between each drum act as downcomers. [14] Due to its three drums, the Yarrow boiler has a greater water capacity.
Admiralty three-drum boiler. A later development of the Yarrow was the Admiralty three-drum boiler, developed for the Royal Navy between the First and Second World Wars. [2] [28] Much of the design work was conducted at Admiralty Fuel Experimental Station [i] at Haslar and the first boilers were installed in three of the A class destroyers of ...
Typical four-drum form Brick enclosure of a Stirling boiler in Queensland, Australia, originally fired on sugarcane bagasse. Chimney is to the right. Stirling boilers are one of the larger arrangements for a water-tube boiler: acceptable for stationary use, but impractical for mobile use, except for large ships with modest power requirements.
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There is a prominent steam drum above the boiler barrel, making it resemble a Flaman boiler. [12] [13] Brotan-Deffner boiler: a variant of the Brotan boiler. The steam drum was shortened and placed behind the boiler barrel, giving a much more conventional silhouette. Around a thousand of these were used in Hungary. [12] [13]