Experimental Research On Producing Oil-Coal-Water Slurry Used By Oily Sludge

Oil sludge is not only one of important pollutant in the development and transportation of oilfield, but also a different problem of oil field environment quality continuous improvement. With China's most oilfield exploitation passing into the mid-late period, oil moisture content is more and more high, output of oil sludge will continue to increase. How to dispose the oil sludge properly and scientifically has become a great problem of petroleum and petrochemical industry. The study make a positive exploration of oil sludge energy-oriented use and disposal which base on the technology of CWS(coal water slurry). The experimental researches of the production of the oil-coal-water slurry are mainly focus on the following aspects:Firstly, the feasibility study of the oil-coal-water slurry's production used by the oily sludge. According to the properties of oil and coal, adopt the design proposal that mixing the scattered processing sludge and high concentration coal-water slurry, studied the coal-oil-water slurry preparation into slurry ability. Results indicate that apparent viscosity of oil-coal-water slurry is blow the 1000 mPa-s and the fluidity and slurry ability are good when the additive quality of the oily sludge which viscosity is reduced is 20%-25%; the oil-coal-water slurry won't hard precipitation or quantize without stabilizer, it has high stability and meets the requirements of the industry application.Secondly, throw the thermal analysis tests studying the oil sludge, coal-water slurry and oil-coal-water slurry. The results showed that with the mixing of oil sludge making oil-coal-water slurry advance ignition temperature than common coal-water slurry, a more rapid burning volatile analysis, but combustible index and combustion characteristic index declined slightly, reduced the slurry burning fire and burn performance. The combustion characteristics of the oil-coal-water slurry are closed to the combustion results of the coal water slurry, and the thermogravimetric curves are similar to the combustion curves of the coal-water slurry.Thirdly, the smoke came from burning oil-coal-water slurry which production from oily sludge and the heavy metal contents came form the combustion ash and slag leach solution are inspected. The results showed that the smoke emission of the oil-coal-water slurry combustion and the heavy metal contents came from the combustion ash and slag leach solution in accordance with the relevant national requirements when the dosage ratio of the oily sludge is 25%.The addition of the oil sludge not only reduce the cost of the production and increase the economic efficiency of enterprises, but also can meet the requirements of the reduction, harmlessness, resource of the oil sludge dispose when producing the oil-coal-water slurry using dispersion technique on viscosity of the oily sludge, which provides a new approach and way to deal with oil sludge and has a broad space for development.