Boiler Type O and Type A

Boiler Type O

Boiler type O has 2 drums, they are steam drum and mud drum. The composition of the convection tubes and water wall tubes forming the letter O. Combustion chamber is placed in the middle between convection tubes and water wall tubes. Boiler type O can be shown in the Figure 1 below:

Figure 1: Boiler Type O 

Legend:

1                    : Furnace (combustion chamber)

2                    : Steam drum

3                    : Mud drum

Boiler Type A

Boiler type A has 3 drums, they are steam drum and two mud drums. Boiler type A can be shown in the Figure 2 below:

Figure 2: Boiler Type A

Legend:

1                    : Furnace (combustion chamber)

2                    : Steam drum

3                    : Mud drum