Preparation and improving stability of bubble petroleum coke water slurry
Preparation and improving stability of bubble petroleum coke water slurry
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DOI：
10.1016/j.fuel.2014.03.032
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发表时间：
2014-07
期刊：
影响因子：
7.4
通讯作者：
Fuyan Gao;Jianzhong Liu;Junhu Zhou;K. Cen
中科院分区：
文献类型：
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作者：
Fuyan Gao;Jianzhong Liu;Junhu Zhou;K. Cen
为了提高石油焦水浆的稳定性，本文对气泡型石油焦水浆进行了研究。浆料中气泡的存在有助于降低其表观粘度并提高其成浆性。基于气泡-颗粒复合体的三维网络结构使气泡-PCWS表现出假塑性特征。研究了曝气时间、起泡剂用量、布风板孔径大小和料浆固体浓度等操作参数对其稳定性的影响。结果表明，随着曝气时间的适度增加和固体浓度的降低，气泡-PCWS的稳定性增加。随着起泡剂用量的增加，稳定性先迅速增加后逐渐降低，在实验范围内，布风板孔径大小变化时，稳定性基本不变。在曝气时间为30 min、起泡剂用量为0.03wt%、固相浓度为65wt%的条件下，鼓泡PCWS比无气泡PCWS在相同条件下的浇注速度提高约80个百分点。
To improve the stability of petroleum coke water slurry (PCWS), bubble-PCWS has been researched in this paper. The presence of bubbles in the slurry helps to decrease its apparent viscosity and enhance its slurryability. The three-dimensional network structures based on the bubble–particle complexes make the bubble-PCWS show pseudoplastic characteristics. Effects of the operational parameters such as aeration time, frother dosage, aperture size of air distribution plate and solid concentration of the slurry on its stability were investigated. The results showed that the stability of the bubble-PCWS increased as aeration time increased moderately and as the solid concentration decreased. Stability increased rapidly at first and then gradually decreased when increasing the frother dosage, and that the stability remained practically unchanged as the aperture size of air distribution plate varied within the experimental range. With aeration time of 30 min, frother dosage of 0.03 wt% and solid concentration of 65 wt%, the bubble-PCWS could achieve an increase of about 80 percentage points in pour rate over PCWS without bubbles under the same conditions.