scotch boiler

scotch boiler

[′skäch ′bȯil·ər]
(mechanical engineering)
A fire-tube boiler with one or more cylindrical internal furnaces enveloped by a boiler shell equipped with five tubes in its upper part; heat is transferred to water partly in the furnace area and partly in passage of hot gases through the tubes. Also known as dry-back boiler; scotch marine boiler (marine usage).
References in periodicals archive ?
The engineroom looks like a miniaturised version of Titanic's (which had similar machinery), with its Scotch boiler, three furnaces and bunkers for 21 tons of coal.
In early January 1904, while steaming off Hobart, one of the Walleroo's four 155 psi Scotch boilers experienced a furnace collapse and subsequent explosion that killed stokers Hall, Ellis, Moore and Cleal.