Pyrolysis characteristics and pollutant release characteristics of Daqing oil sludge

被引：0
|
作者：
Zheng F. [1 ]
Li H. [1 ]
Lin F. [1 ]
Zhang Y. [1 ]
Wu Y. [2 ]
Chen Z. [2 ]
Ma W. [1 ]
Chen G. [3 ]
机构：
[1] School of Environmental Science and Technology, Tianjin University, Tianjin
[2] Daqing Oilfield Water Co., Ltd., Daqing
[3] School of Mechanical Engineering, Tianjin University of Commerce, Tianjin
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 01期
关键词：
Final temperature; Heating rate; High oil content sludge; Pollutant release; Pyrolysis; Thermodynamics; Waste disposal;
D O I：
10.16085/j.issn.1000-6613.2021-0365
中图分类号：
学科分类号：
摘要：
Daqing tank bottom sludge is a kind of sludge with high oil content and great resource recovery potential. It also has the characteristics of high viscosity, strong adhesion, complex composition and slow natural settlement. In this study, the pyrolysis characteristics and pollutant release characteristics of high oil sludge in Daqing were investigated. The quality and composition of gas/liquid/slag three-phase products under different final pyrolysis temperature and heating rate were tested. The results showed that the amount of C2H4 released from pyrolysis gas was significantly higher than that from other gases. CO2 gas only had a peak value at 700℃, and H2 was released before 700℃, and a large amount of H2 was released between 700℃ and 800℃; the increase of final pyrolysis temperature and heating rate will lead to a large number of low chain hydrocarbons, and medium chain hydrocarbons showed a trend of first increase and then decrease; final pyrolysis temperature would have a certain effect on SiO2 and CaCO3 in solid products, while heating rate has little effect on solid products influence. The release characteristics of N, S and Cl small molecule pollutants in gaseous products were measured by on-line flue gas analyzer. HCN and NH3 were the precursors of NOx and convert to NOx at 600℃; most of the chlorinated compounds would be released below 600℃; sulfur pollutants were released in two peaks, and the peaks above 600℃ were mainly due to the decomposition of sulfate. © 2022, Chemical Industry Press Co., Ltd. All right reserved.
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页码：476 / 484
页数：8
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