Research On Key Technologies Of Sootblower′s Simulation

With the strengthening of China’s industrial restructuring dynamics and deepening of environmental protection consciousness, boiler operation is facing the dual requirements of lower operating costs and reduce emissions of pollutants. Fouling and slagging phenomenon was inevitable during boiler operation, Long-term fouling was directly affect the normal operation of the boiler, indirectly result in efficiency reduced and economic losses of boiler.Sootblower is a device used to remove fouling and slagging of boiler heating surface and the main equipment to ensure the normal operation of the boiler, improve boiler efficiency, reduce emissions of air pollutants. Lance tube breakage, bending, leakage, corrosion, etc. are existed in practical application, these faults lead to unstable operation of boiler. Sootblower research has become a very important issue to ensure the boiler normal operation. A large number of literatures of Sootblower fault, soot blowing system optimization, nozzle design, etc. were found, however, the literature of simulation analysis of the structure of soot blowers is rare. In this paper, based on the Finite Element Method, the simulation analysis of a company’s Long Retractable Sootblower was done, and three key technologies of Sootblower’s simulation were studied.First, the static analysis of beam was done. A relatively suitable section type was chosen by comparing the stiffness and strength of beam of different section type and considering the convenience of process.Second, when the car drove to the dangerous position, in order to maintain the level of the axis, the static analysis of beam was done, and the dangerous position of beam was determined. The situation of tube was hit by falling ash was analyzed, this paper got the deformation curve of the axis, the axis shape of beam was redesigned.Finally, in order to avoid resonance, the modal analysis of sootblower was done, and select the appropriate rotational speed of lance tube by calculating the frequency preserve.By studying these key technologies, this paper has got some Finite Element simulation methods of sootblowers structural design and analysis, these methods can improve the design efficiency and calculation accuracy of Sootblower, and it also has a certain significance to a similar product design.