Effect of Modified Sludge on the Particles Flocculation and Slurry Stability in the Co-slurry of Sludge and Petroleum Coke

被引：2

作者：

Liu, Meng ^{[1
]}

Zhang, Xiaobin ^{[2
,3
]}

Zhao, Liang ^{[1
]}

机构：

[1] Southeast Univ, Minist Educ, Key Lab Energy Thermal Convers & Control, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China

[2] Taiyuan Univ Technol, Coll Min Engn, Taiyuan 030024, Peoples R China

[3] Shanxi Water Conservancy Tech Coll, Yuncheng 044004, Peoples R China

来源：

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING | 2017年 / 15卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

petroleum coke sludge slurry; Zeta potential; flocculating mechanism; stability; energy consumption; SEWAGE-SLUDGE; NETWORK STRENGTH; OILY SLUDGE; GASIFICATION; BOILERS; SIZE;

D O I：

10.1515/ijcre-2016-0120

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Sewage sludge modified by Ca(OH)(2) and Fe-2(SO4)(3) were used as make the slurry with petroleum coke, and changes in the size distribution and a total number of particles in the slurry were determined by Focused Beam Reflectance Measurement (FBRM) to explore the particles flocculation mechanism. In addition, the structural strength of petroleum coke sludge slurry (PCSS) was calculated by two mathematic models to illustrate the how the sludge improves the stability of PCSS. The results indicated that the absolute value of the Zeta potential of PCSS increased with the sludge addition and that PCSS stability improved. However, the absolute value of the Zeta potential decreased and the stability declined after the sludge was modified by Fe-2(SO4)(3) and Ca(OH)(2). Petroleum coke particles were wrapped by sludge flocs, and small particles flocculated during their co-slurry process to form a spatial network structure, effectively prevented the settlement of petroleum coke particles and ultimately improved the stability of slurry. The calculation results obtained by the two mathematic models reveal that the shearing energy consumption per-unit-quality of PCSS using raw sludge is twice or thrice than that of PCWS. However, energy consumption was reduced after the sludge was modified by Fe-2(SO4)(3).

引用

页数：13

共 32 条

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