污泥增强水焦浆稳定性的机制及理论分析  

Mechanism and Theoretical Analysis on Stability of Petroleum Coke-Water Slurry Enhanced by Sewage Sludge

作　　者：黄冰冰[1] 刘猛[1] 段钰锋[1] 陈高森[1] 马贵林[1] 王素美[1] 

机构地区：[1]能源热转换及其过程测控教育部重点实验室(东南大学),江苏省南京市210096

出　　处：《中国电机工程学报》2014年第17期2747-2753,共7页Proceedings of the CSEE

基　　金：国家自然科学基金(51206028);国家重点基础研究发展计划项目(973计划)(2010CB227001);中国博士后科学基金面上及特别资助(2012M520971;2013T60491)~~

摘　　要：选取城市污泥与石油焦共成浆,采用扫描电子显微镜（scanning electron microscope,SEM）和X射线能谱仪（energy dispersive X-ray detector,EDX）考察污泥与石油焦共成浆的作用机制。借助旋转黏度计和转矩流变仪,建立污泥增强水焦浆稳定性的理论模型,定量计算泥焦浆三维空间结构强度,考察污泥改性对泥焦浆流变性和稳定性的影响。结果表明,污泥与石油焦共成浆过程中,污泥絮体包裹石油焦颗粒形成具有一定强度的空间网状结构,从而增强泥焦浆的稳定性；随着污泥添加量增加,泥焦浆触变环面积增大,稳定性增强,但是污泥改性后,泥焦浆的稳定性增强趋势减缓。模型预测结果表明,剪切泥焦浆的单位质量能耗约为剪切水焦浆时的2~3倍,因此,污泥的加入增强了水焦浆的稳定性,污泥在与石油焦共成浆过程中起到了稳定剂的作用。The sewage sludge and petroleum coke were mixed to make slurry. The co-slurry ability mechanism of the petroleum coke sludge slurry （PCSS） was investigated by means of scanning electron microscope （SEM） and energy dispersive X-ray detector （EDX）. A theoretical model was deduced of how the sludge can improve the petroleum coke water slurry （PCWS） with the help of rotational viscometer and torque rheometer. The three-dimensional spatial structure strength of the PCSS was predicted quantitatively. The effects of sludge on rheological property and stability of the PCSS was investigated. The outcome shows that petroleum coke particles are wrapped by the sludge flocs during their co-slurry process to form a spatial network structure with some intensity, thus improving the stability of the PCSS. With increase of sludge addition, thixotropic loop area grows up and stability of the PCSS is enhanced. While the ascending trend of the PCSS stability reduces gradually after sludge modification. The results of model prediction show that energy consumption per-unit-quality of shearing the PCSS is as 2 to 3 times bigger as that of the PCWS. It can be concluded that it is the sludge that ameliorates stability of the PCWS. The additive sludge acts as a stabilizer in the co-slurry process of sewage sludge with petroleum coke.

关 键 词：污泥 泥焦浆 稳定性 空间结构强度 理论模型 

分 类 号：TK09[动力工程及工程热物理]