Analysis of Flow Distribution and Ash Deposition Property onSerpentuator in Economizer of 300 MW Pulverized Coal Bolier
In order to assess the ash deposition on the serpentine and connected pipe of economizer in a 300MW pulverized coal bolier,a cold numerical simulation was carried out.The unidirectional coupling model was used to solve the gas paticle flow by ingoring the influence of the solid phase on the gas phase.The flow field was obtained and analyzed under the condition of given different inlet velocity and pitch.The results showed that the ash deposition about the four pipe on the bottom was serious in the parallel tubes.In the serpentine,the ash deposition about the four elbow on the top was serious and the abrasion was focused on the four elbow on the bottom.With the increase of flow velocity in the parallel tubes,speed curve steepened,and reflux zone decreased.At various points in the the serpentine,the velocity increased and the direction was constant.With the increase of pitch,the ash deposition on the parallel tubes was complex and the disturbance of fluid increased in the serpentine.
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万方数据
维普
