Study On Dynamics Of The Oil Sludge Pyrolysis

Oil as one of the world’s most important energy, the comprehensive utilization technology have draw more and more widespread attention at home and abroad. Oily sludge accmulates from the oil exploitation, transportation and refining process, is a kind of hazardous waste and the harmless treatment become an imminent problem. In this article, the pyrolysis technology is used to treat oily sludge, at the premise of reduction and harmlessness, the hydrocarbon resources of oily sludge is reused.The pyrolysis process of oil sludge was divided into three stages:the volatilization of water and light components stage, the pyrolysis of heavy components stage, the decomposition of mineral stage. Through the continuous pyrolysis experiment, the temperature, pressure, heating rate and feed rate on pyrolysis product distribution were studied, and the optimal reaction condition of standard atmospheric pressure,500℃and10℃/min heating rate were established. The feed size and the temperature of drying medium which effect on the drying process were studied by the intermittent drying process. Page revised model MR=f(T)exp(-kt") could meet the sludge drying process better. The pyrolysis kinetics model combined with44decomposition reaction and drying kinetic equation, and the simulation results could coincide with the experimental values better.Finally, the temperature distribution in pyrolysis furnace was simulated by Fluent software. The effect of heating power (the outer wall temperature), the diameter and length of the pyrolysis furnace were researched, which have an impact on the results of the continuous pyrolysis. Determining the optimal size for cracking furnace furnace length80cm, diameter190mm, and determined the optimal heating surface temperature of1173K.