Classification of Soot Blower

Fig.1: Long Retractable Soot Blower

Soot blowers that are installed in steam boiler commonly can be classified as:

1.      Long Retractable Soot Blower

This type of soot blower is located in area superheater and reheater. There is not temperature limitation in its use. Has a pair (2) of nozzle in lance tube located on both side in exact opposition (angle 0^o and 180^o) with diameter approximately 22 or 25 mm. The steam flow through soot blower is approximately 4 to 20 tph. Need more space to place long retractable soot blower on the sides of steam boiler.

Fig. 2: Wall Soot Blower

2.      Wall / Short Retractable Soot Blower

This type of soot blower is located in area furnace. There is not temperature limitation in its use. Has 1 or 2 nozzle in lance tube with diameter approximately 25 mm. The steam flow through soot blower is approximately 3.5 tph. Mostly used in high temperature furnace of Pulverized Fuel Boiler. One soot blower is required to blow furnace area in every 10 m².

3.      Rotary Soot Blower

Fig 3: Rotary Soot Blower

This type of soot blower is located in area boiler bank, economizer, and air heater. Its use is limited to temperature 1100^o C. Have many nozzles in lance tube with diameter approximately 8 mm. The steam flow through soot blower is approximately 3.5 tph. Maximum lance length is limited until 7 m, if the steam boiler larger than 7 m, so soot blower will be installed in both sides and can be operated by motor or manual.

4.      Rake Soot Blower

Fig. 4: Rake Soot Blower

This type of soot blower is located in area fin tube economizer and vertical tubular air heater. Its use is limited to temperature 530^o C. Have many sets of nozzle. The steam flow through soot blower is approximately 3.5 – 4.5 tph. Dimension of rake soot blower is limited to 5 m length and 3 m width.