What is the principle of fire tube boiler?

What is the principle of fire tube boiler?

A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.

What is the principle of water tube boiler?

The working principle of water tube boiler is thermal siphoning (circulation of natural water). Basically, this type of boiler includes two drums namely steam, lower or mud drum. The water tube boiler diagram is shown below, and these two drums are associated via two tubes such as downcomer and riser.

What are the differences between fire tube and water tube boiler working principle?

The main differences between the fire tube and the water tube boiler are the hot gases flow inside the tube and water surround them in the fire tube boiler whereas, In the water tube, water flows inside the tube and Hot gases surround them.

What is the difference between fire tube boiler and water tube boiler?

The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes surrounded by combustion gas used to transfer heat energy and produce steam.

Which boiler is not a fire tube boiler?

Cochran; Lancashire; Locomotive; Babcock and Wilcox. (Ans:d). The following are the water tube boilers except. Fire-tube boiler – WikipediaAs these are short tubes of large diameter and the boiler continues to use a relatively low pressure, this is still not considered to be a water-tube boiler.

Which of the boiler is water tube boiler?

A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes.

What are the parts of fire tube boiler?

Different Components & Mountings Placed on the fire tube boiler

  • Safety valve.
  • Feed check valve (a kind of non-return valve)
  • Water level indicator.
  • Pressure gauge.
  • Steam stop valve.

What are the advantages of water tube boiler over fire tube boiler?

Fire Tube Boiler Water Tube Boiler
The overall efficiency of this boiler is up to 75% The overall efficiency is up to 90% with the economizer
Water doesn’t circulate in a definite direction Water circulates in a well – defined direction

What are different types of boilers?

Boilers can be broadly classified as shell tube and water tube boilers.

  • Shell and tube boilers. Shell and tube boilers are also referred to as fire tube or smoke tube boilers.
  • Different types of fire tube boilers:
  • Lancashire boiler:
  • Locomotive boiler.
  • Reversal Chamber:
  • Wet Back Boilers:
  • Dry Back Boilers:
  • Two pass boilers:

Which is better fire tube or water tube?

Between the two types of boiler designs, water tube boilers are remarkably more efficient than their fire tube counterparts. This stems from a number of factors: Water turns to steam more quickly. When the water flows through the tube, it is surrounded by the heat source, rather than the other way around.

Which is the characteristics of water tube boiler?

Characteristics of water tube boiler: Allows for higher levels of heat efficiency. This boiler is used for the needs of very high steam pressures such as in power plants. Steam capacity between 4,500-12,000 kg / hour with very high pressure. Using oil and gas fuel for boiler water tubes assembled from the factory.

What is the working principle of a fire tube boiler?

Construction and Working Principle of Fire Tube Boiler The construction of a water tube boiler can be equipped with cylindrical shell, vertical, firebox in the base, space for water in the center segment, and space for steam in the higher segment. A fire-grate is located at the fire-box base as well as coal is fired-up on the firebox.

What is a water tube boiler?

The water-tube boiler is those boiler in which the water is present inside the tubes and fire or hot gases surround these fire tubes. The examples of water tube boilers are a La-Mont, Benson, Stirling, Babcock and Wilcox, Yarrow and Loeffler boiler.

How does a boiler work?

Hot flue gases flow inside the tube and the water outsides the tubes. Water flows inside the turbine and hot flue gases outside the tube. These boilers are generally internally fired. These boilers are generally extra really fired. The boiler pressure limited to 20 bar.

How many types of fire tube steam boilers are there?

The three types of fire tube steam boilers are horizontal return tubular boiler, scotch marine boiler, and vertical fire tube boiler. All fire tube boilers have the same basic operating principles.