Co-slurry ability of bluegreen algae and Shenfu coal
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摘要: 考察了预处理方法对含水蓝藻表观黏度的影响，以及蓝藻对神府煤浆成浆浓度、流变性和静态稳定性的影响。结果表明，采用添加化学药剂、高速搅拌、加热等方法对含水蓝藻进行预处理，可以使表观黏度从72mPa·s降低到21.8mPa·s(剪切速率100s-1)。蓝藻结构受到破坏是表观黏度降低的主要原因。含水蓝藻表观黏度的降低有利于蓝藻煤浆成浆浓度的提高。当添加水质量与含水蓝藻质量比为1∶1时，蓝藻煤浆的成浆浓度达到60%。蓝藻的加入提高了神府煤浆的稳定性，使稳定性从4h提高到72h以上。蓝藻煤浆为假塑性流体，剪切变稀。Abstract: The influence of pre-treatments on apparent viscosity of blue-green algae, the maximum solids loading, rheological property and static stability of the coal-algae slurry was examined. The results show that chemical treatment, agitate and heating are useful pre-treatment methods. The apparent viscosity of bluegreen algae is declined from 72mPa·s to 21.8mPa·s (sharing rate 100s-1). The decrease in the apparent viscosity of blue-green algae is due to the structure of blue-green algae destroyed, which is favorable for the increase in the maximum solids loading of coal-algae slurry. When the mass ratio of water and blue-green algae is 1∶1, the maximum solids loading of coal-algae slurry could reach to 60%, which meets the industry requirement. After blue-green algae is added to coal-water slurry, the sediment time of coal-algae slurry is changed from 4h to 72h. Coal-algae slurry is a pseudo-plastic liquid, which is shear-thinning and easy to transport.
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Key words:
- blue-green algae /
- coal-algae slurries /
- rheological property /
- co-gasification
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