Soot blowing system and method for pi-shaped boiler furnace arch

Abstract

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.

Description

technical field [0001] The invention relates to a soot blowing system and a soot blowing method, in particular to a soot blowing system and a soot blowing method for a π-type boiler refraction angle. Background technique [0002] A large amount of ash accumulation on the slope of the flame angle of a large π-type boiler is a common problem in power plants. Severe ash accumulation may cause the lower elbow of the high temperature superheater to be buried in the ash pile, which will affect the heat exchange effect, and cause local overtemperature of the pipe wall when the furnace is shut down, which will cause unsafe factors. A large amount of ash accumulated on the slope of the Zheyanjiao suddenly poured down and rushed into the furnace, interfering with the combustion and causing unimaginable adverse consequences. Research shows that the main reasons for a large amount of ash accumulation on the slope of the flame angle of a large π-type boiler include the following aspects...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects of the existing boiler deflection angle soot blower device and system, and provide a soot blowing system and soot blowing method for the π-type boiler deflection angle, which not only solves the problem of the boiler deflection angle slope dust accumulation on the surface of the superheater, and avoid excessive blowing damage to the flame angle and the wall of the superheater, and can also save sootblowing energy consumption

Images