What is on the shell side of a fire tube boiler?

The combustion of the fuel takes place in a furnace and the hot gases travel from the furnace through the fire tubes to the chimney. The water in the boiler shell surrounds the fire tubes.

What are the four types of fire tube boiler?

Types of Fire Tube Boilers

  • Cornish boiler.
  • Lancashire boiler.
  • Locomotive boiler.
  • Scotch marine boiler.
  • Admiralty-type direct tube boiler.
  • Horizontal return tubular boiler.
  • Immersion fired boiler.
  • Vertical fire-tube boiler.

Why boiler ends are curved?

The ends of the tubes are bent so that they can be connected to the drums radially as shown in Fig. 11.11. The ends of the tubes in the drums are expanded in order to have gas tight joint.

What are fire tube boilers used for?

Fire-tube boilers have the advantage of being easy to install and operate. They are widely used in small installations to heat buildings and to provide power for factory processes. Fire-tube boilers are also used in steam locomotives.

What is ogee ring in boiler?

The ”Ogee” ring is a thicker plate that separates the shell from the furnace. Orifice plate is a thin circular plate. It is fitted into a pipe line so that it can be used for a differential pressure measurement.

What is mud drum in boiler?

The mud drum is the lower drum in a boiler. The steam drum is the upper drum of a boiler where all of the generated steam is collected. The mud drum and water tubes are filled completely with water, while the steam drum is only partially full.

What is the function of economizer?

Economizers are heat exchangers that transfer the heat in the flue gas to another medium‚ generally the boiler feed-water‚ although other streams are sometimes used such as make-up water.

What is an HRT boiler?

Horizontal Return Tubular (HRT) – this is an old and very simple design which is still being manufactured. The boiler consists of a shell, a tube sheet on each end of the shell, and tubes connecting the two tube sheets. The boiler is mounted above a steel or masonry furnace.

Why do boilers have drums?

Steam drums are used on recirculating boilers that operate at subcritical pressures. The primary purpose of the steam drum is to separate the saturated steam from the steam-water mixture that leaves the heat transfer surfaces and enters the drum.

Why are boiler tubes inclined?

-Babcock and Wilcox Boiler tubes are kept inclined at an angle of 10 to 15 degree to promote water circulation. -The boiler rests over a steel structure independent of brick work so that the boiler may expand or contract freely.

Which type of fuel is used in fire tube boiler?

Fire tube boilers can use fuel oil, gas or solid fuel in their operations.

What is gusset stay?

noun A triangular plate having a flange turned on two sides, which is used as a bracket-stay in the corners of a steam-boiler.