壬基酚聚氧乙烯醚聚合度对水煤浆浆体性质的影响
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摘要: 研究了壬基酚聚氧乙烯醚型添加剂的聚合度对变质程度不同的8种煤所制得的水煤浆浆体性质的影响规律。结果表明，壬基酚聚氧乙烯醚添加剂的聚合度对于8种煤所制得的水煤浆的成浆性、流变性以及静态稳定性均有一定的影响，存在一最佳范围。研究还发现，用壬基酚聚氧乙烯醚型添加剂制备水煤浆时，该添加剂的作用与煤的分析基水分质量分数、丝质组分质量分数以及孔体积之间存在着相关性。Abstract: Additives have usually been used to improve the slurryability and rheological behavior as well as static stability of coal water slurry (CWS). The effect of polymerization degree of polyoxyethylene nonyl phenyl ether (PNPE) on the properties of CWS prepared from 8 coals was investigated. It is found that CWS with high coal content can be prepared when PNPE polymerization degree is in a optimal range from 40 to 80. The relationships between coal properties and maximum concentration of slurry and minimum flow index were analyzed by Multiple Linear Regression method. Regression results suggest that low value of moisture content and low value of small pore volume are favourable to the slurryability of CWS when PNPE additive is added, and large value of vitrinite reflectance (Rmax) facilitates the formation of CWS with the rheological behavior of pseudo plasticity. The static stability test results show that the important factors determine the CWS properties are high rank of coal, low inertinite content, and suitable PNPE additive polymerization degree as well as.
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