The conventional soot blowing mode of coal-fired boiler considers that the ash slagging process of boiler heating area is a linear function of time. The conventional soot blowing is mainly judged by time

which is easy to cause waste of steam and excessive soot blowing to reduce the surrounding heating surface

which has certain potential safety hazards and increased cost. Based on the analysis of the harm of ash slagging on the heating surface of the boiler and the deficiency of timing

quantitative and sequential soot blowing

combined with the soot pollution monitoring technology on the heating surface

the corresponding intelligent soot blowing optimization strategy is proposed and applied in No. 2 boiler. The results show that after adopting the soot monitoring and intelligent soot blowing guidance system

the annual fuel reduction is about1 400 t and the annual fuel investment is about 1.19 million yuan. Reasonable soot blowing is required. The medium loss of soot blowing steam of a single unit is reduced by 5%～10% every year

which can bring an economic saving of 600 000 yuan to the power plant. After the implementation of the intelligent soot blowing optimization guidance system

a single unit can bring nearly 1.79 million yuan to the power plant every year. The soot pollution monitoring and intelligent soot blowing system of boiler heating surface can blow soot at the "most appropriate" time

which will bring good economic and social benefits to thermal power plants.