Study On The Properties And Reuse Of The Water Made By The Process Extracted Bitumen From Oil Sand

With the growth of the world economy,the consumption of oil and gas deposits and the rise of oil prices,unconventional oil resources,oil sands has become an important part of the world's energy.In this paper,the oil sands of Fengcheng in Xinjiang were used as the object of study.Dean-Stark method was used to estimate the content of bitumen in oil sands.Different alkali was picked as extracting agent to extract bitumen under the experimental conditions.Alkali and different surfactants was compounded in order to improve the recovery and finding out the more suitable proportion efficiency.Through improving the traditional solvent extraction method,this experiment innovate an improved alkali and organic solvent extraction method of asphalt.Studied on the composition of the wastewater.At the same time,the oil was separated and find the character of the substances.The inner reason of stable sewage was studied by emulsification stability,interfacial tension,droplet microstructure,Zeta potential.In order to achieve the reuse criteria,the method of reusing sewage was researched and the more suitable formula was raised.The result showed that the oil content of oil sands in Xinjiang Fengcheng was 11.7%,which was more suitable for industrial extraction.The best extraction conditions were as follows:the alkali concentration was 1.5%,the ratio of liquid to solid was 2:1,the temperature was 90?,the stirring speed was 110r/min,the heating time was 60min,washing rate achieved82.7%;through mixing with the surfactant,washing rate can get 88.5%;choosing a natural solvent limonene and compounded with alkali to extract bitumen,the rate can reach 95.9%fulfil experimental requirements.Based on the analysis of elemental analysis,infrared spectroscopy,acid value.Finded the factors of SF₁ and SF₃₁1 were the internal cause.The results show that the order of the initial components and sub-components on the emulsifying properties of the simulated emulsions is as follows:F₁>F₂;SF₁?SF₃₁>SF₂>SF₃₂>SF_41.The primary components F₁ and F₂ have weak emulsifying activity and have typical of emulsion stability;Subcomponent SF₂,SF₃₂,SF₄₁ mixed with water to form a stable emulsion of poor ability;SF₁ and SF₃₁ can form a more stable simulated emulsion with water.Since the oil sands water-based extraction effluent is negatively charged,the absolute value of the emulsion?can increase a lot when adding a certain amount of grit or emulsifier OP-10 to the emulsion.Through adding OP-10,the absolute value of?of SF₁ and SF₃₁1 emulsions varied greatly,SF₄₁1 oil rate dropped to very low.The reason for the stability of the effluent may be the interaction between the grit,the emulsifier OP-10 and the sub-components SF₁,SF₃₁,SF_41.Through the determination of interfacial tension,microscopic photo MIVNT analysis and comparing the stability of sub-components on the sewage emulsion,the result proved that SF₁ and SF₃₁1 have effective influence on reducing the interfacial energy.The water made by the process extracted bitumen from oil sand is directly reused,through 6 times,the recovery rate still reached 65.3%.The reverse demulsifier RH-1020have better effect,after the demulsification of suspended solids in sewage decreased by21.6%,oil content decreased by 46.2%.The flocculant PFS was selected and the optimum reaction conditions were obtained:dosage 120mg/L,reaction time 15min,temperature50?.At this time,the removal rate of suspended solids in sewage can reach 87.4%,the oil removal rate is 82.9%,the calculated oil content is 218.02mg/L and the suspended matter content is 376.61mg/L,which meets the standard of reuse.The project stipulates the sewage treatment standard.