Wang Shuai, Wu Feng, Di Bei Bei, Yan Yuan, Tang Yang Chao
School of Chemical Engineering, Northwest University, Xi'an710069, China.
Luoyang Jianguang Special Equipment Co., Ltd., Luoyang471003, China.
ACS Omega. 2023 Feb 3;8(6):5861-5876. doi: 10.1021/acsomega.2c07658. eCollection 2023 Feb 14.
The introduction of a multi-jet structure at the bottom and middle of a fluidized bed can intensify the interphase mixing and improve desulfurization efficiency. The computational fluid dynamics were used to study the gas-liquid-solid flow in a bottom multi-jet fluidized bed and middle multi-jet fluidized bed (BMJFB and MMJFB). It was found that for the gas-liquid-solid interphase mixing, the intensification effect of introducing the multi-jet structure in the middle of the bed is more obvious than that in the bottom. The effect of the water spray volume flow rate on the MMJFB was examined under the same conditions. The results showed that with the increase of the water flow rate, the gas-liquid-solid interphase mixing and desulfurization process are promoted in the MMJFB, and its desulfurization efficiency reaches 68.2%. The effects of the width and number of multi-jet structures on the MMJFB were also investigated. The results show that when the jet width is 20 mm and the number of jets is four, the gas-liquid-solid three-phase is uniformly mixed and the desulfurization efficiency of the MMJFB equals 69.3%, which is 18.5% higher than that of the conventional fluidized bed.
在流化床底部和中部引入多喷嘴结构可强化相间混合并提高脱硫效率。采用计算流体力学方法研究了底部多喷嘴流化床和中部多喷嘴流化床（BMJFB和MMJFB）内的气液固流动。研究发现，对于气液固相间混合，在床层中部引入多喷嘴结构的强化效果比在底部更明显。在相同条件下考察了喷水流量对MMJFB的影响。结果表明，随着水流量的增加，MMJFB内的气液固相间混合和脱硫过程得到促进，其脱硫效率达到68.2%。还研究了多喷嘴结构的宽度和数量对MMJFB的影响。结果表明，当喷嘴宽度为20 mm且喷嘴数量为4个时，气液固三相均匀混合，MMJFB的脱硫效率为69.3%，比传统流化床高18.5%。
