半干法烟气脱硫喷嘴的雾化特性研究
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摘要: 利用FAM型衍射式激光测粒仪，对双流体石灰浆液雾化喷嘴的雾化特性进行了试验研究，得到了预测雾滴平均粒径的经验公式，分析了气耗率、石灰浆液浓度等参数对雾化粒径分布和雾化角的影响规律。结果表明，气液质量比增大，浆液液滴平均直径(SMD)减小；浆液浓度增加，液滴平均直径增加。气液质量比在0.05～0.3的范围内可获得良好的雾化效果，雾化粒径一般在20 μm～100 μm。喷嘴的雾化角较小，一般在20°～25°之间。气液质量比增加，雾化角减小；而石灰浆浓度对雾化角影响较小。Abstract: Experimental research has been done on a twin-fluid nozzle using FAM laser particle distribution analyzer. Factors affecting spray angle and distributions of Sauter mean diameter (SMD) have been analyzed. It is found that the most important parameters are air liquid ratio and slurry concentration. The SMD will be decreased when decreasing slurry concentration and increasing air liquid ratio. Fine atomization can be obtained for air to liquid ratio in the range from 0.09 to 0.3. The SMD changes from 20 micron to 100 micron respectively. The correlation of SMD has been obtained considering slurry concentration and air liquid ratio. It is found that the spray angles are similar for three nozzles. They are about 20 to 25 degree. The spray angle will be decreased when increasing air to liquid ratio but almost unchanged when changing slurry concentration.
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Key words:
- nozzle /
- atomization /
- characteristics
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