At present,there is a tendency of frequent cracking of the extension section of the smoke pipe in the high temperature area of fuel oil(gas)boiler.Based on the theory of plate and shell,this paper establishes the force differential equation of the extension section of the smoke pipe,and derives the calculation formula of the disturbance and circumferential stress of the extension section of the smoke pipe.By analyzing the force change of the extension section of the smoke pipe during the operation of the boiler,the reasons for the cracking of the extension section of the smoke pipe are found,and the conditions to prevent the cracking of the extension section of the smoke pipe are determined.Finally,suggestions are put forward to avoid the cracking of the extension section of the smoke pipe.
Extension section of the smoke pipeCrackStress analysisThermal fatigue
NETL
NSTL
万方数据
