Abstract:

Lime slurry nozzle is the key equipment of flue gas drying desulfurization system.The nozzle atomization performance at different nozzle structural parameters was experimentally studied by using Win212-2 laser particle distribution analyzer.The influence of structural parameters on the lime slurry atomization and optimal nozzle structure were obtained.Under the atomizing pressure of 0.8 MPa, the nozzle showed good atomization performance in the condition of rotational channel numbers of 4, rotational channel expanding angle of 6°, rotational chamber shrinking angle of 90°,D/d=4.4—6.4, D/b=6—8 and L/b=3.3—4.0.The atomizing granularity and atomizing angle of the optimal nozzle were respectively less than 100 μm and about 70°.The atomization performance of optimal nozzle was greatly improved as compared with ordinary nozzle.

Key words:

石灰浆, 喷嘴, 雾化性能, 结构参数

摘要：

石灰浆液雾化喷嘴是烟气喷雾干燥脱硫系统的关键设备。利用Win212-2型激光粒度分析仪，对不同结构参数的低浓度石灰浆旋流雾化喷嘴的低压雾化性能进行了实验研究，得出了喷嘴结构参数对喷嘴雾化性能的影响规律和石灰浆低压旋流雾化喷嘴的最优化结构参数。优化后的喷嘴结构参数为：旋流片槽数为4，旋流片槽张角6°，旋流室收缩角90°，D/d=4.4～6.4,D/b=6～8,L/b=3.3～4.0。该喷嘴在0.8 MPa的低压下，雾化粒度可达到100 μm以下，雾化角为70°左右，具有良好的雾化性能，比普通喷嘴的雾化性能有较大提高。

关键词:

石灰浆, 喷嘴, 雾化性能, 结构参数