What methods are available for optimising the start-up of centrifugal fan blades in dust removal boilers?

What methods are available for optimising the start-up of centrifugal fan blades in dust removal boilers?

Currently, the drive of centrifugal fans in dust removal boilers is optimised using separation aerodynamics, whilst the original arc of the centrifugal fan blades was optimised to improve the adiabatic efficiency of the impeller. Three different forms of optimisation were implemented, the results of which were compared, and analysed using a univariate method. Following optimisation, the thermal efficiency was improved to varying degrees, effectively mitigating flow separation, reducing flow losses, and improving flow conditions to varying extents. This demonstrates that numerical aerodynamic optimisation methods are effective in enhancing the aerodynamic performance of the blades, with different optimisation methods yielding distinct results. The use of parametric methods and the selection of an optimal operating point can achieve the desired optimisation effects and facilitate the design of the centrifugal fan. Firstly, theoretical methods are employed to parameterise the dust removal boiler centrifugal fan, utilising its geometric model and software to calculate the internal flow field of the centrifugal fan. Through simulation analysis, key factors influencing the performance of the dust removal boiler centrifugal fan can be identified. By modifying certain critical geometric parameters to optimise the fan, numerical simulations are conducted to improve its efficiency and address factors affecting its performance. On this basis, taking into account the influence of gas viscosity, the design of the original impeller was revised. Following the application of a new convoluted cable to the original dust removal boiler centrifugal fan, numerical simulations were conducted once more; the experimental results indicate an improvement in performance. The experimental results demonstrate that the internal flow field of the dust removal boiler centrifugal fan has been optimised, and the efficiency of the fan has been improved. The aerodynamic performance of several different blade fan designs was compared. Flow field calculations were performed on the propeller and flow surfaces. The influence of different blade types on the shape of the fan’s maximum pressure point pressure curve and efficiency was analysed, along with the practical engineering values of these blade types. Consequently, the operating parameters for specific adaptation schemes were set to verify the performance requirements of the test results.