The invention discloses a
soot blowing
system and method for a pi-shaped
boiler furnace arch. The
soot blowing
system utilizes a pneumatic and steam-driven
fluidization principle, and overcomes the friction of accumulated
soot on the upper slope of the furnace arch, thus enabling the accumulated soot to separately flow to a
hearth and a horizontal
flue to be discharged. A hood-shaped
soot blower is mounted on a diaphragm of the upper slope of the furnace arch, arranged between a high temperature
superheater and a high temperature reheater, penetrates through the upper slope of the furnace arch, and is connected with a soot blowing media pipeline. The shapes of a first soot blowing
pipe and a second soot blowing
pipe of the hood-shaped
soot blower are telescopic pipes, thereby improving thespeed of soot blowing
airflow, and enhancing the soot blowing effect. During the soot blowing process,
compressed air firstly blows the accumulated soot on the upper slope of the furnace arch, and then steam blows residual accumulated soot hard to clear, so that an excellent soot blowing effect can be achieved by a compound blowing mode. The soot blowing
system can effectively clear the accumulated soot on the upper slope of the
boiler furnace arch, avoids the occurrence of excessive blowing loss and
pipe explosion of the furnace arch and the wall face of the
superheater and saves the energyconsumption of blowing soot.