The concept of soot blowing in industrial steam boilers:
For long-term operation of the boiler, the heating surface will generate ash and coke, which will deteriorate the heat transfer. For the tail flue, due to the long-term accumulation of combustible materials, recombustion accidents will occur. Therefore, after the boiler is operated for a period of time, the Clean the heated surface by blowing dust on the surface.
Two types of boiler soot blowing:
(1) The furnace ash blowing uses a short ash blowing gun for ash blowing on the heating surface of the water-cooled wall;
(2) The ash blowing of the flue uses a long ash blowing gun, which is used for blowing ash on heating surfaces such as superheaters, reheaters, economizers, and air preheaters.
Impact of ash blowing on the safe operation of industrial steam boilers:
Boiler soot blowing will cause fluctuations in boiler negative pressure, steam temperature, steam pressure, load, and water level, and the effect of soot blowing on different heating surfaces will not be the same. In the process of soot blowing, these parameters should be strengthened and monitored. Regarding the effects of soot blowing in industrial steam boilers, there are the following aspects:
(1) Ash blowing has a certain impact on the stability of combustion, and the monitoring of combustion should be strengthened during the soot blowing process;
(2) During low load operation and unstable combustion, soot blowing cannot be performed; at the same time, soot blowing makes the heated surface clean and the heat absorption increases, thus reducing the exhaust temperature;
(3) As the ash blowing will cause large fluctuations in the furnace negative pressure, a large negative pressure should be maintained during the ash blowing process to prevent the furnace from blowing positive pressure.
Tips: During the soot blowing operation, the inspection of the soot blower should be strengthened. If there is a fault in the soot blower, it should be registered and contacted for repair and treatment. If it is found that the soot blower is stuck in the furnace and there is a leak, stop soot blowing , And make the corresponding treatment in a timely manner.
