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Simulation and experimental validation studies on a new type umbrella plate scrubber

机译：新型伞板式洗涤塔的仿真与实验验证研究

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Scrubbers are being widely used to removal the dust, dioxide sulfur and other harmful gases, which emitted from coal-burning boilers. In this paper, the new type umbrella plate scrubber was developed and studied through computational fluid dynamics (CFD) simulation and experimental methods. Initial work included gas phase simulation using standard k-ε turbulent model and Reynolds stress model (RSM). After gas phase was converged, particles were injected into the new device. Discrete phase model (DPM) was used for particle trajectories determination. The pressure drop and the collection efficiency of the device were predicted through simulation. The simulative results show that the pressure drop of the device is 230-250 Pa and the efficiency is about 84-86%, with the inlet velocity equal to 10.6 m/s and the dust concentration ranging from 2 to 22 g/m~3. As the dust concentration was 61.81 g/m~3, both the pressure drop and the efficiency increase with inlet velocity (less than 12 m/s) increase. However, the inlet velocity increases continuously, the pressure drop still increase, and the efficiency increase relaxed. In addition, the experiment was conducted to validate the simulative results, which show good agreements. The relative error of the pressure drop and the efficiency are approximately 4% and 10%, respectively. The results obtained both from the simulation and from the experiment have demonstrated that simulation is an effective method for study the new device. Furthermore, the study indicates that significant improvements on the new type of umbrella plates could be realized by maintaining comparable the efficiency at a lower pressure drop.
机译：洗涤塔被广泛用于去除燃煤锅炉排放的灰尘，二氧化硫和其他有害气体。本文通过计算流体动力学（CFD）模拟和实验方法，开发并研究了新型伞板洗涤器。最初的工作包括使用标准k-ε湍流模型和雷诺应力模型（RSM）进行气相模拟。气相收敛后，将颗粒注入新设备中。离散相模型（DPM）用于确定粒子轨迹。通过仿真预测了装置的压降和收集效率。仿真结果表明，该装置的压降为230-250 Pa，效率约为84-86％，入口速度为10.6 m / s，粉尘浓度为2-22 g / m〜3。 。当粉尘浓度为61.81 g / m〜3时，压降和效率均随入口速度（小于12 m / s）的增加而增加。然而，入口速度持续增加，压降仍然增加，效率增加放宽。另外，进行了实验以验证模拟结果，这显示出良好的一致性。压降和效率的相对误差分别约为4％和10％。从仿真和实验获得的结果表明，仿真是研究新设备的有效方法。此外，研究表明，通过在较低的压降下保持可比的效率，可以对新型伞板进行重大改进。

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