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2. Package boiler - Wikipedia

   en.wikipedia.org/wiki/Package_boiler

   Internal layout of a three-pass fire-tube boiler. Package boilers are commonly called water or fire tube Boilers. Water tube boilers use convection heating, which draws the heat from the fire source, and passes against the generating tubes of the boiler, causing water inside those tubes to boil off into steam.

3. O-type boiler - Wikipedia

   en.wikipedia.org/wiki/O-type_boiler

   Small examples of the O-type are used as some package boilers. [2] Most package boilers are fire-tube boilers, often used for heating or process steam, and generally work at lower pressures than propulsion boilers. If high pressure steam is needed, such as for steam turbines, then a water-tube boiler may be preferred and these are mostly O-type ...

4. Fire-tube boiler - Wikipedia

   en.wikipedia.org/wiki/Fire-tube_boiler

   The fire-tube boiler developed as the third of the four major historical types of boilers: low-pressure tank or "haystack" boilers, flued boilers with one or two large flues, fire-tube boilers with many small tubes, and high-pressure water-tube boilers. Their advantage over flued boilers with a single large flue is that the many small tubes ...

5. Scotch marine boiler - Wikipedia

   en.wikipedia.org/wiki/Scotch_marine_boiler

   A "Scotch" marine boiler (or simply Scotch boiler) is a design of steam boiler best known for its use on ships. Sectional diagram of a "wet back" boiler. The general layout is that of a squat horizontal cylinder. One or more large cylindrical furnaces are in the lower part of the boiler shell. Above this are many small-diameter fire-tubes ...

6. Water-tube boiler - Wikipedia

   en.wikipedia.org/wiki/Water-tube_boiler

   Such watertube boilers in thermal power stations are also called steam generating units. The older fire-tube boiler design, in which the water surrounds the heat source and gases from combustion pass through tubes within the water space, is typically a much weaker structure and is rarely used for pressures above 2.4 MPa (350 psi). A significant ...

7. Boiler design - Wikipedia

   en.wikipedia.org/wiki/Boiler_design

   Boiler design is the process of designing boilers used for various purposes. The main function of a boiler is to heat water to generate steam. Steam produced in a boiler can be used for a variety of purposes including space heating, sterilisation, drying, humidification and power generation. The temperature or condition of steam required for ...