| With the continuous development of oilfield production in China,the output of solid waste in the combined stations of major oilfields has increased year by year.Oily sludge is a dangerous and hazardous oilfield solid waste which belongs to the national list of hazardous wastes.Oily sludge is an oily solid waste produced in the process of oil exploration,petroleum exploitation,petroleum refining and transportation,and the innocuous treatment of oil-bearing sewage.Oily sludge is characterized by high viscosity,complex components,difficult separation and separation,toxic components and odorous odor.The heavy metals,benzene and anthracene toxic substances contained in oily sludge can cause great pollution to soil,water and air,and the aromatic hydrocarbons contained in the sludge will cause serious health hazards to people and animals and plants,including polycyclic aromatic hydrocarbons(PAH).Organic compounds can enter humans through natural water,or enter human bodies indirectly through animals and plants,causing irreversible damage to important organs in the human body.Therefore,it is urgent to treat oily sludge with resources,innocuity and decrement.On the basis of previous research,this paper makes an analysis and test on the oil sludge of three oil sludge samples in Xinjiang,Daqing and Jilin,and uses the Wiener-Stokes settlement equation to establish the emulsified water separation model based on the random statistics of montacroco.According to the prediction of oil and water separation effect under different technological parameters,the process route of oil sludge treatment based on quenching and tempering pretreatment+three stage circulation extraction+centrifuge separation+extractant was put forward,and the design of integrated oily sludge treatment device for sled assembly and small test experiment were carried out.First,the paper investigates the domestic and foreign development of oily sludge treatment technology,and analyses the oil sludge samples in Jilin and Daqing,and tests the composition of oily sludge samples,and tests whether the content of heavy metals and oil in the sludge is beyond the law range.The oil content,solid content and water content of oily sludge were determined.Secondly,this paper selects the Wiener-Stokes equation,and establishes the emulsified water separation model based on Monte Carlo random statistics,and predicts the oil and water separation effect under different process parameters.The model calculation is basically the same as the experimental results:.On the basis of the determination of the composition of the oily sludge samples at each sampling point,this paper selected light oil to carry out a three stage cyclic extraction laboratory analysis of oily sludge,and by changing the extraction process parameters:temperature,stirring rate and the ratio of the extraction agent to obtain the best process parameters for the treatment of oily sludge.The experimental results show that,under the conditions of mixing rate 1200 rpm,stirring time 40 min,heating temperature 60 C and mixing ratio(extractant: oil sludge)is 2,the dewatering rate of oil sludge is more than 86%,the deoiling rate is more than 93%,and the recovery rate of extractant is more than 91%.Finally,on the basis of the optimal process parameters and mathematical model prediction obtained by the experimental analysis,a process route is proposed based on the conditioning pretreatment+three stage circulation extraction+centrifugal separation+extractant recovery,and a sled integrated oil containing sludge treatment device is designed and produced,and the structure of the device is carried out.The design optimization and control system are designed.The experiment was conducted on the basis of the sled oily sludge treatment device.The experimental results showed that the oil content of the oily sludge treated by this improved process was under 0.3% of the national standard and met the requirements of the GB4284-84 "control standard of pollutants in agricultural pollutants". |
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