A 'Scotch' marine boiler (or simply Scotch boiler) is a design of steam boiler best known for its. Archived from the original on 2010-01-12. ^ Milton, J.H. (1961) [1953]. Marine Steam Boilers (2nd ed.). ^ McCluskie, Tom (1998). Anatomy of the Titanic. Marine Steam Boilers J H Milton Pdf To Excel. 5/30/2017 0 Comments EXHIBITION AND EXPLANATION OF SIGHT-TUBES NOW USED FOR THE MARINE BOILERS OF THE CITY OF DUBLIN STEAM PACKET COMPANY'S VESSELS. Open PDF Minutes of the Proceedings of the Institution of Civil Engineers. Cyclopedia of engineering a general reference work on steam boilers pumps.

• 1 - Furnace • 2 - Steam drum • 3 - Water drum An O-type boiler is a form of. It is named, like the and, from the approximate shape of its tubes. They are characterised by single and vertically above each other, with curved vertical water tubes to the sides forming an overall cylindrical volume. There is no grate at the base of this furnace space, so they are fired by liquid burners, oil or gas, rather than a solid fuel furnace producing. O-type boilers first appeared as, such as the, once the switch from coal firing to began.

The large radiant heating area available allows a combustion rate, for a given furnace volume, of around twice that for a contemporary boiler, such as the. Small examples of the O-type are used as some.

Most package boilers are, often used for heating or, and generally work at lower pressures than propulsion boilers. If high pressure steam is needed, such as for, then a water-tube boiler may be preferred and these are mostly O-type. O-type package boilers appeared post-World War II, with the general shift away from coal and to more automated boilers needing fewer human operators. O-type boilers are available with or without end. They may also use tube and cement infill, or else a steel membrane wall between the tubes. References [ ].

Hart master programmu. Cochran boiler Parallel tube boilers place all of their fire-tubes in a single parallel group, running from side to side of the boiler shell. The best known of these is the design.

Cochran boiler [ ] The Cochran boiler was produced by Cochran & Co. Of, Scotland. It is widely used in marine practice, either fired directly by coal or oil fuels, or else used for from the exhaust of large diesel engines.

Where such a boiler may be heated either by the exhaust gases of the main propulsion plant, or else separately fired when in port (usually by oil rather than coal) it is referred to as a composite boiler. The boiler is a cylindrical vertical water drum with a domed top. This domed shape is strong enough not to require. The is another hemispherical dome, riveted to the base to give a narrow waterspace. The fire-tubes are arranged in a single horizontal group above this, mounted between two flat vertical plates that are inset into the boiler barrel. The first of these plates forms a shallow and is connected to the firebox by a short diagonal neck.

The combustion chamber is of the 'dry back' form and is closed by a steel and firebrick plate, rather than a water jacket. The exhaust from the fire-tubes is into an external and a vertical. For maintenance access to the tubes, a manhole is provided in the hemispherical dome. A typical Cochran boiler, as illustrated, might be 15 feet (4.6 m) high and 7 feet (2.1 m) in diameter, giving a heating surface of 500 square feet (46 m 2) and a grate area of 24 square feet (2.2 m 2). Working pressure is between 100 and 125 psi.

Where composite firing is used, there are several possible arrangements for the heating gases. Most use a double-pass tube arrangement where another dry back combustion chamber routes the gases from one tube bank to return through the other.