Types of Smoke Tube Boiler

A smoke tube boiler (It is also called a fire tube boiler) is a type of boiler in which hot gases from a fire pass through one or (many) 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.

Types of smoke tube boiler

According to the location of furnace there are two types of smoke tube boiler and these are external furnace and internal furnace type.
There are mainly three types of external furnace smoke tube boiler.
Horizontal return tubular smoke tube boiler.
Short fire box smoke tube boiler.
Compact fire tube boiler.

There are also two types of internal furnace smoke tube boiler
Horizontal tubular.
Vertical tubular smoke tube boiler.

One of the most commonly used fire tube boilers is horizontal return smoke tube boiler. Horizontal return fire tube boiler is most suitable for low capacity thermal power plant. The main constructional features of this boiler are one big size steam drum which lies horizontally upon supporting structures. There are numbers of fire tubes come from furnace and also aligned horizontally inside the drum. When the drum is filled with water these tubes are submerged in water.

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