【作者】 桂斌；

【导师】 周志军； 刘建忠；

【作者基本信息】 浙江大学 ， 工程热物理， 2006， 硕士

【摘要】 作为清洁能源之一的水煤浆技术，可以缓解石油资源的紧缺，同时还减少了SO₂和NOx的排放，受到各国的重视。作为水煤浆技术的核心，水煤浆添加剂的开发起着举足轻重的作用。 本文通过一系列的实验得到了一种适合于神木混煤制浆的廉价高效添加剂，并确定了添加剂的用量和各种表面活性剂的比例，配得的煤浆浓度最高可达63.2％，添加剂成本大概在20元／吨浆左右，加入稳定剂以后最长稳定时间可达3个月。通过对煤的红外光谱分析以及添加剂的红外光谱分析，设想了一种用红外光谱仪测定煤粉的基团，推断添加剂配方的方法。测定体系的ζ电位，我们自制的高分子交联的添加剂可以将煤的ζ电位降低到—50mv以下，进一步研究了水煤浆添加剂的作用机理。 研究了一些理化特性对煤的成浆性的影响。煤中灰分可能有利于制浆，大多高灰煤比低灰煤所制水煤浆的粘度要低；不同粒度级配的煤粉制得的水煤浆粘度差别较大，采用合适的粒度级配可改善浆体性能；随温度的升高浆体粘度越低，性能就越好；内水含量越高，煤粉越难成浆；体系pH值呈弱碱性时，煤浆性能越好；金属阳离子的浓度越高，煤浆性能越好，但存在一个极大值，超过极大值后，煤浆粘度不再降低。 我们配制了一些不同稳定性的煤浆，可以适应不同生产条件下使用。并通过乳液和胶体的稳定性理论分析了水煤浆稳定剂的作用机理。更多还原

【Abstract】 Coal Water Slurry（CWS）, as one of clean energy sources, can solve the lack of petroleum resource, It can also decrease the emission of SO₂ and NO_x · So it becomes more important attention-getting due to its many virtues.In this paper, a series of experiment is done, then get a cheap and high efficient additive which can produce good CWS. The dosage of additive and the proportion of surfactant. The highest concentration can reach 63.2%. The cost of additive is about 20￥.It can be preserved 3 months when add any stabilizer. The IR spectrogram of coal and the additives be analyzed. The ζ potential of the CWS be mensurated too. The effect mechanism of the additives is researched. The effect of the physical and chemical character to the CWS be researched too. Ash in the coal is propitious to the preparation of CWS, the higher ash content in the coal the lower viscosity of CWS. The different particle distribution in the coal leads the difference of viscosity, using appropriate particle distribution can ameliorate the performance of CWS. When the temperature rises, the viscosity of CWS also reduces. More internal water content of the coal the higher viscosity. The pH value of the system is low alkalinity , the viscosity of the CWS is the lowest. More concentration of the metal positive ion, we can get the CWS have lower viscosity. But if更多还原