The Optimal Study Of The Rotor Blades Of Rotary Pulverized Coal Separator

In thermal power plants,the pulverizing system as an important part of boiler, plays an important role in the whole power system, provides a guarantee for combustion process, affects the economy and the stability of the equipment operation. Pulverized coal separator is the key auxiliary equipment of pulverizing system, which has the advantages of small footprint and timely response. And it is widely used But rotating pulverized coal separator still exist some problems, such as its export integrated separation efficiency is low, pulverized coal fineness still has lower spaceIn order to solve the problems above, considering the complex internal structure of the separator and the inconvenience of field measurement experiment Therefore, this article introduce the computational fluid dynamics(CFD) technology to the study. Using numerical simulation technology to spinning pulverized coal separator modeling,to study the internal flow field, improve the rotor structure, analysis the effect,and achieve the final research purposes.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.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 mou nting angle is 45°, angle of twist is 15° and vertical mounting angle is 0°. Finally, the coal fineness falls by 41.4%, and its comprehensive performance rises by 24.25% 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.