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Investigating the co-combustion characteristics of oily sludge and ginkgo leaves through thermogravimetric analysis coupled with an artificial neural network

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Science China(Technological Sciences) 2022年第2期65卷 261-271页

作者： LI ShuChen NIU ShengLi HAN KuiHua LI YingJie WANG YongZheng LU ChunMei Shandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology&Equipment School of Energy and PoweringShandong UniversityJinan 250061China

The co-combustion characteristics of oily sludge and ginkgo leaves(GL) in an oxy-fuel atmosphere are investigated via thermogravimetric analysis coupled with an artificial neural network. The combustion characteristics of blends improve as the GL mass ratio increases. The interaction indices used to evaluate the interaction between the two solid combustibles present a complex nonlinear relationship in different stages. The Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose methods are used to calculate the activation energy of the blends, which increases with an increase in the oxygen concentration, in different atmospheres. Compared with the radial basis function, the backpropagation neural network performs better in predicting the combustion curve of the blends.

关键词： oily sludge co-combustion oxy-fuel atmosphere thermogravimetric analysis artificial neural network

Application of hydrophobic ionic liquid [Bmmim][PF6] in solvent extraction for oily sludge

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Chinese Journal of Chemical Engineering 2020年第9期28卷 2294-2300页

作者： Lingfu Zhu Zuhong Lin Jie Tan Liyang Hu Tingting Zhang College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China Centre for Resource and Environmental Research Beijing University of Chemical TechnologyBeijing 100029China

In this study, an ionic liquid(IL), 1-butyl-2,3-dimmmethylimidazolium hexafluorophosphate([Bmmim][PF6]),was used in combination with a composite solvent of methyl acetate and n-heptane to enhance the oil extraction from oily sludge. The oil recovery increased by approximately 15% compared with that of solvent extraction without [Bmmim][PF6] at the optimal ratios of IL to sludge and solvents to sludge, which were at 2:5(M/M) and 4:1(V/M), respectively. The saturate, aromatic, resin and asphaltene(SARA) analysis revealed that the recovery of resins and asphaltenes was increased by 14% and 38%, respectively, in the solvent extraction with the addition of [Bmmim][PF6]. [Bmmim][PF6] maintained a good performance after its reuse four times. The addition of[Bmmim][PF6] changed the adhesion forces between oil and soil. The IL-assisted solvent extraction procedure followed the pseudo second-order kinetic model, while the unassisted solvent extraction procedure followed the pseudo first-order kinetic model. The results also demonstrated that [Bmmim][PF6] decreased the solvent consumption by approximately 60% each time. Additionally, [Bmmim][PF6] can be easily separated. The results suggested that enhancing the solvent extraction with this IL is a promising way to recover oil from oily sludge with a higher oil recovery rate and lower organic solvent consumption than those with the unassisted solvent extraction method.

关键词： oily sludge Ionic liquid Solvent extraction Oil component Kinetic model

Characterization of oil component and solid particle of oily sludge treated by surfactant-assisted ultrasonication

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Chinese Journal of Chemical Engineering 2021年第6期34卷 53-60页

作者： Zuhong Lin Fushuai Xu Lili Wang Liyang Hu Lingfu Zhu Jie Tan Zhifeng Li Tingting Zhang Department of Environmental Science and Engineering Research Centre for Resource and EnvironmentBeijing University of Chemical TechnologyBeijing 100029China Sinopec Petroleum Exploration Research Institute Beijing 100083China

The ultrasonic technique has been demonstrated to be a promising method for the disposal of hazardous oily ***,the separation of oil from the surfaces of the solid particles is still difficult due to the strong interaction between the oil and solid *** this study,three types of surfactants were used to assist the ultrasonic treatment of oily *** oil component,surface composition,and structure of the solid particle were *** results showed that different surfactants had different oil removal *** the three surfactant-assisted sonication systems,the oil removal rate increased during the starting reaction period and then decreased with longer sonication *** results of four components analysis suggested that surfactant easy to be ionized in water posed a better removal effect on resins,while the amphiphilic surfactant preferred saturates,aromatics and *** morphology analysis indicated that particle size was shattered into smaller ones by the ultrasonic process,and the wettability of the solid surface also changed during this *** characterization of the oil component and solid particle during surfactant-assisted ultrasonication treatment will help to better understand the separation of oil from oily sludge and improve the oil recovery efficiency from oily sludge.

关键词： oily sludge Surface Morphology Ultrasonic treatment Surfactants

Theoretical study on the pressurization characteristics of disc-seal single screw pump used in high viscosity oily sludge conveying field

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Petroleum Science 2022年第3期19卷 1361-1370页

作者： Zeng-Li Wang Hou-Wei Shi Shu-Yu Wang Zong-Ming Wang Mu-Ming Hao Jun Wang National Engineering Laboratory of Offshore Geophysical and Exploration Equipment China University of Petroleum(East China) College of New Energy China University of Petroleum(East China)

The disc-seal single screw pump(DSSP)used in the field of high viscosity oily sludge transport has a huge ***,there is no research on the pressurization characteristics of the DSSP at present,which makes its application *** view of this,the pressurization process mathematical model of the DSSP was established based on the geometric model of the *** using this model,the pressurization characteristics of DSSP and the influence of working parameters on the pressurization process were studied combined with the principle of back-flow *** results show that the instantaneous pressurization process could be realized mainly depending on the reflux pressurization from the outlet chamber to the pressurization chamber when the screw rotor rotating angle is located at-5°to+5°.The pressure in the pressurization chamber will increase with the increase of working parameters which include inlet pressure,outlet pressure,screw rotation velocity and dynamic viscosity of fluid medium in the area of flow-back *** screw rotation velocity and the viscosity of the conveying medium have significant effects on the peak pressure in the pressurization chamber,and the peak pressure in the pressurization chamber is proportional to the screw rotation velocity and the dynamic viscosity coefficient of the conveying *** proportional coefficient between the peak pressure and the screw rotation velocity is 6.29×10~*** proportional coefficient between the peak pressure and the dynamic viscosity of the conveying medium is 6.28×10~6.

关键词： Disc-seal single screw pump oily sludge Pressurization characteristics Mathematical model Reflux pressurization

Modification technology for separation of oily sludge

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Journal of Central South University 2011年第2期18卷 367-373页

作者：李小兵刘炯天肖云奇肖鑫 School of Chemical Engineering and Technology China University of Mining and Technology

Based on the analysis of the properties of oily sludge samples,the effect of modification parameters,such as liquid to solid (L/S) ratio,agitation temperature,agitation intensity,agitation time and pH on the modification of oily sludge was investigated with the content of oil remnants in dry sludge as a reference index. Remixing experiments were carried out according to a simplex-lattice design,where Sx4056 was used as the demulsifier,petroleum sulfonate as the surfactant and sodium silicate (Na2SiO3) as the dispersant. The surface modification reagent formulation was optimized by a regression equation on the modified effect and based on the amounts of surface modification reagents. The results show that the content of the oil remaining in dry oily sludge is 0.28% of 10.15% oily sludge,when the reagent concentration rises to 3.5 g/L under the optimum experimental conditions.

关键词： oily sludge surface modification reagent simplex-lattice design

Dissipation of polycyclic aromatic hydrocarbons in crop soils amended with oily sludge

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Acta Geochimica 2016年第4期35卷 437-444页

作者： Shaoping Kuang Wenjuan Yu Yan Song Yaqing Su Huihui Wang Lina Wang Qingdao University of Science and Technology Zhengzhou Road 53Qingdao 266042ShandongPeople's Republic of China Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta Binzhou UniversityBinzhou 256600ShandongPeople's Republic of China

Oil fields present a potential ecological risk to nearby farmland soil. Here we present a new method designed to evaluate the ability of winter wheat(Triticum aestivum) to contribute to the dissipation of polycyclic aromatic hydrocarbons(PAHs), which are priority pollutants in soils contaminated by oily sludge. The influence of different doses of oily sludge on the dissipation of PAHs was studied along with individual PAH profiles in soils after different periods of plant growth. Five soil samples were artificially contaminated with different percentages of oily sludge(0 %, 5 %, 10 %, 15 % and 20 %). Winter wheat grew in the oily sludge–amended soils for 265 *** content in the soils was monitored over the course of the study. The rate of PAH dissipation is related to the properties of different PAHs, period of winter wheat growth, and oily sludge application dose. Analysis for treated soils indicates that the dissipation of PAHs increased significantly over the first 212 days, followed by minimal changes over the final 53 days of treatment. In contrast, PAH dissipation slowed with increasing oily sludge application. For each PAH, the experimental results showed a significant compound-dependent trend. Winter wheat in the present study significantly enhanced the dissipation of PAHs in oily sludge–contaminated soil.

关键词： oily sludge Soil Polycyclic aromatic hydrocarbons Dissipation Bioremediation

Oil Phase Molecular Compositions of oily sludge Using Mass Spectrometry

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China Petroleum Processing & Petrochemical Technology 2020年第4期22卷 21-25页

作者： Hu Lin LV Haipeng Wang Guanghua Guo Xianhou Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining&TechnologyXuzhou 221116

oily sludge was recognized as a kind of hazardous wastes,so recycling its high content of petroleum hydrocarbons can contribute to the clean *** this study,oily sludge was subjected to continous ultrasonic extraction with an acetone/carbon disulfide(CS2)mixture *** transform infrared spectroscopy(FTIRS),gas chromatography/mass spectrometry(GC/MS),and Quadrupole exactive Orbitrap mass spectrometry(QPEOTMS)were used to analyze the oil phase compounds from oily *** n-alkanes ranging from C8 to C31 hydrocarbons were detected in oil *** with the analysis results of GC/MS,more heteroatom-containing compounds(HACOCs)of oil phase such as O3,O4,N2Oo and N3Oo(o=0—3)could be detected by using the QPEOTMS ***,these findings will potentially contribute to the clean and efficient utilization of oily sludge.

关键词： oily sludge petroleum hydrocarbon ultrasonic extraction heteroatom-containing compounds

Co-pyrolysis of oil sludge with hydrogen-rich plastics in a vertical stirring reactor:Kinetic analysis,emissions,and products

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Frontiers of Environmental Science & Engineering 2022年第10期16卷 131-143页

作者： Lujun Zhao Jiaming Shao Li Xiang Yiping Feng Zhihua Wang Fawei Lin State Key Laboratory of Industrial Control Technology College of Control Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Zhejiang SUPCON Technology Co. Ltd.Hangzhou 310053China School of Environmental Science and Engineering Tianjin University/Tianjin Key Laboratory ofBBiomass/Wastes UtilizationTianjin 300072China

Pyrolysis is an effective method to treat oily sludge(OS)due to its balance between oil recovery and nonhazardous ***,tank bottom OS contains a high content of heavy fractions,which creates obstacles for pyrolysis due to the high activation *** incomplete cracking of macromolecules and secondary polymerization decreases the oil quality and causes coking during the operation *** study introduced polyethylene(PE)into OS to deploy the H/Ceff ratio of feedstocks for pyrolysis A strong interaction between OS and PE during copyrolysis could be observed from the TG/DTG *** tightly participated in OS degradation,while OS also promoted PE degradation at high *** pits were generated in solid residues from copyrolysis,which was attributed to the uniform and violent gas *** addition to HCN,other nitrogenous and sulphurous pollutants were ***,more gas products were attained after PE addition with more value-added compositions of alkanes and *** the oil yield decreased after PE addition,the oil products from copyrolysis possessed higher heating values and higher contents of light fractions with short chains as well as ***,copyrolysis of OS and PE significantly improved the pyrolysis process and resulted in high oil quality.

关键词： oily sludge Pyrolysis Polyethylene H/Ceff ratio Oil quality