为探明脱硫-除尘一体化系统内反应密集区以及因袋式除尘器远端利用率不高而导致除尘效率低下的原因,急需对一体化系统内流场分布进行研究.应用Fluent软件对密相干塔脱硫-除尘一体化系统进行仿真模拟,标准κ-ε湍流模型模拟气相流动,离散相(DPM)模型模拟固相流动,对改进前后的一体化系统进行模拟.模拟结果表明:除尘器内部增加气流板及改变风口布置方式对烟气在除尘器内的均匀流动都起到了良好的作用,其中改变风口布置方式效果更显著.密相干塔内部导流板最优设计长度为7.5 m,角度为45 °.
In order to find active reaction zone of dense flow absorber and the reason that why the distal end of bag-filter was not highly used,it was urgent to study the internal flow field distuibution and the change of pressure field. In this paper,the system of a dense flow absorber integrated bag-filter was simulated with Fluent software before and after im-provement. The two-equation turbulence model and discrete phase model(DPM) were used to simulate the gas phase flow and solid phase flow,respectively. Results of the simulation showed that changing the layout of outlets had much more positive effects on the homogeneous flow inside bag-filter than adding the baffle plate inside bag-filter. The empiri-cal study also indicated that the most optimized design of the baffle plate inside the dense flow absorber was 7.5 m in length and 45 degree in angle.
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