双通道气流式MTP反应喷嘴雾滴粒径分布的研究

发布时间：2018-05-16 04:18

本文选题：绝热固定床 + 双通道　；参考：《化学工程》2017年08期

【摘要】：雾化喷嘴的性能直接取决于索泰尔平均粒径SMD、雾滴粒径分布PSD和雾滴覆盖直径DCD。利用冷模实验,以双通道气流式MTP反应雾化喷嘴为研究对象,考察了喷嘴结构与雾化性能之间的关系,研究了具有不同旋流结构的喷嘴在不同气液比q_(mG)/q_(mL)下SMD,PSD及DCD之间的变化规律。结果表明,旋流槽尺寸与结构、液相通道内径dL对SMD,PSD和DCD具有显著地影响。当喷嘴结构参数为:旋流通道数n=2,旋流通道尺寸b×h=0.5mm×1.0 mm,液相通道内径dL=1.0 mm时,随着q_(mG)/q_(mL)由8.70增加至20.32,喷嘴对应SMD由20.02μm降至17.88μm,雾滴粒径分布介于9.91μm和48.8μm之间,特征中径D_(0.5)达到21.45μm。当n=3,b×h=1.5 mm×2.0 mm和2.0 mm×2.0 mm,dL=2.5 mm时,SMD随着q_(mG)/q_(mL)的增加分别由62.48μm降至58.89μm,由63.02μm降至59.39μm,雾滴粒径分布变宽,介于34.3μm和111.6μm之间,D_(0.5)达到64.02μm。当n=4,b×h和dL保持不变时,PSD和D_(0.5)基本不变,SMD随气液比q_(mG)/q_(mL)的增加由64.07μm变至60.65μm。而且,DCD由φ640mm增至φ800 mm。
[Abstract]:The performance of the atomizing nozzle is directly dependent on the average particle size of Sotheer, droplet size distribution PSD and droplet coverage diameter DCD. The relationship between nozzle structure and atomization performance was investigated by using cold model experiment and two-channel airflow MTP reaction atomization nozzle as the research object. The variation of SMD-PSD and DCD of nozzle with different swirl structures under different gas-liquid ratios (Q / Q / M / L) has been studied. The results show that the size and structure of swirl channel and the inner diameter of liquid channel dL have significant effects on SMD-PSD and DCD. When the nozzle structure parameters are as follows: swirl channel number n ~ 2, swirl channel size b 脳 h=0.5mm 脳 1.0 mm, liquid channel diameter dL=1.0 mm, with the increase of Q / M GG / Q _ S _ (mL) from 8.70 to 20.32, the corresponding SMD of the nozzle is reduced from 20.02 渭 m to 17.88 渭 m, the particle size distribution of droplet is between 9.91 渭 m and 48.8 渭 m, and the characteristic median diameter is 21.45 渭 m. The SMD decreased from 62.48 渭 m to 58.89 渭 m and from 63.02 渭 m to 59.39 渭 m, respectively, and the particle size distribution of the droplets widened to 64.02 渭 m, ranging from 34.3 渭 m and 111.6 渭 m to 64.02 渭 m, respectively, when the size distribution of the droplets decreased from 1.5 mm 脳 2.0 mm and 2.0 mm 脳 2.0 mm to 2.5 mm. The SMD decreased from 62.48 渭 m to 58.89 渭 m and 59.39 渭 m from 63.02 渭 m to 59.39 渭 m, respectively. The SMD is almost unchanged with the increase of gas / liquid ratio (Q / M / Q / Q / M) from 64.07 渭 m to 60.65 渭 m. Moreover, DCD increased from 蠁 640mm to 蠁 800mm.
【作者单位】：神华宁夏煤业集团有限责任公司研发中心;中国船舶重工集团公司第七一一研究所;
【基金】：国家国际科技合作专项项目(2015DFA40660) 宁夏回族自治区宁东能源化工基地科技创新项目(2014NDKJ100) 中国科学院2014年度“西部之光”人才培养计划
【分类号】：TQ051.73

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