Recovery of energy and iron from oily sludge pyrolysis in a fluidized bed reactor.
In the steel industry, about 0.86 ton of oily sludge is produced for every 1000 tons of rolling steel. Due to the adverse impact on human health and the environment, oily sludge is designated as a hazardous waste in the Resource Conservation and Recovery Act (RCRT). In this paper, the pyrolysis treatment of oily sludge is studied in a fluidized bed reactor at a temperature range of 400-600 °C. During oily sludge pyrolysis, a maximum oil yield of 59.2% and a minimum energy loss of 19.0% are achieved at 500 °C. The energy consumption of treating 1 kg oily sludge is only 2.4-2.9 MJ. At the same time, the energy of produced oil, gas and solid residue are 20.8, 6.32, and 0.83 MJ, respectively. In particular, it is found that the solid residue contains more than 42% iron oxide, which can be used as the raw material for iron production. Thus, the simultaneous recovery of energy and iron from oil sludge by pyrolysis is feasible.
College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan, 430081 Hubei, China.
Linbo
L
Qin
College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan, 430081 Hubei, China. Electronic address: hanjun@wust.edu.cn.
Jun
J
Han
College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan, 430081 Hubei, China.
Xiang
X
He
College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan, 430081 Hubei, China.
Yiqiu
Y
Zhan
Department of Agricultural and Biological Engineering, Mississippi State University, MS 39762, USA.
Fei
F
Yu
D001674:Bioelectric Energy Sources; D019149:Bioreactors; D003246:Conservation of Energy Resources; D006801:Humans; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D009821:Oils / Q000737:chemistry*; D013232:Steel
D007220:Industrial Waste; D009821:Oils; D013232:Steel; D007501:Iron
Energy; Fluidized bed; Iron; Oily sludge; Pyrolysis; Recovery