The Optimal Study Of The Rotor Blades Of Rotary Pulverized Coal Separator Based On Numerical Simulation

The pulverizing system as an important part of boiler, provides a guarantee for combustion process, affects the economy and the stability of the equipment operation. Dynamic classifier is the key auxiliary equipment of pulverizing system, has the advantages of small footprint and timely response. It is widely used in power plant. But it has issues that comprehensive efficiency is unsatisfactory, and export coal fineness can not meet the requirements of anthracite burning, There is still great space for optimization. Nevertheless, Its solid-gas flow is extremely complex, causing some difficulties for studying. Therefore this paper study on its operational charateristics and information of flow field in the method of computational fluid dynamics, it is good for researching better.Firstly, learning the working principle of pulverized coal rotary separator deep, analyzing the force of pulverized coal and the main factors affecting the performance of the separator, designing high-efficiency separator with a new type of twisted and bowed blade, and doing deal with variable cross-section of bending and torsion deformation to original rotor blades.Setting vertical mounting angle of blade, effectively increases the aweather of separator to improve the ability. Secondly, The original separator is established mathematical model and meshed by software GAMBIT, and simulated by software FLUENT. Concluding distribution of the flow field, comprehensive performance, coal fineness, pressure drop and tracking the trajectory of coal particles. By comparing the results of the analysis to determine the optimal parameters of the new blade, the results show it can work better when horizontal mounting angle is 45°, angle of twist is 15° and vertical mounting angle is 5°. Finally, the coal fineness falls by 49.3%, and its comprehensive performance rises by 20.7% in the new separator, it is obvious and verifying the improved rotary separator is high-efficiency.Therefore, researching the solid-gas flow with CFD technology can understand motion characteristics of the flow field inside the separator better, provides a great help for the design of it. The conclusion has a reference value and significance for design and manufacture of dynamic separator.