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炼化企业停工大检修污水水质特性综合表征

工业水处理 2024年第9期44卷 151-159页

作者：张璇陈霖张鑫倩王庆宏何晨詹亚力陈春茂中国石油集团安全环保技术研究院有限公司北京102200 中国石油大学(北京)化学工程与环境学院石油石化污染物控制与处理国家重点实验室北京102249 北京市城市排水监测总站有限公司北京100012

炼化企业停工大检修期间无组织排放大量高浓度污水,对综合污水处理厂的正常运行构成严重冲击。将宏观污染指标与微观污染组成相结合,从污染负荷、体系稳定性、污染组成及生物毒性4方面,对清洗污水和清洗-钝化混合污水两类典型大检修污... 详细信息

炼化企业停工大检修期间无组织排放大量高浓度污水,对综合污水处理厂的正常运行构成严重冲击。将宏观污染指标与微观污染组成相结合,从污染负荷、体系稳定性、污染组成及生物毒性4方面,对清洗污水和清洗-钝化混合污水两类典型大检修污水进行水质特性综合分析。清洗污水和清洗-钝化混合污水均表现出极高的有机污染负荷、悬浮态和胶体态污染物、体系稳定性以及较强的急性生物毒性。清洗污水和清洗-钝化混合污水的有机污染组成复杂,两者的极性污染物组成均以OxS1类为主,前者以O3S1类污染物相对丰度最高,推测源自磺酸盐类表面活性物质;后者以O4S1类污染物相对丰度最高,推测源自烷基硫酸盐类或硫酸酯盐类表面活性物质。两者的弱极性污染物组成差异较大,清洗污水以醇醚类、醚类和石油烃类为主,而清洗-钝化混合污水则主要是小分子杂环类、芳香烃类和酚类。对两类典型大检修污水水质特性的分析研究可指导大检修污水预处理工艺开发,为炼化企业大检修期间综合污水处理厂的稳定运行提供支持。

关键词：炼化企业停工大检修污水水质特性表征预处理

汽提净化水回用原油电脱盐过程的溶解性有机物转移特征

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化工进展 2024年第4期43卷 2153-2160页

作者：张瑞寇悦孙鹤王辰予李琢宇王庆宏陈春茂中国石油大学(北京)化学工程与环境学院重质油全国重点实验室北京102249

汽提净化水回用原油电脱盐是炼化企业重要的节水措施。本研究基于气相色谱-质谱和静电场轨道阱高分辨质谱组合分析,从微观层次上探究了汽提净化水回用电脱盐过程的溶解性有机物转移特征。电脱盐过程中,汽提净化水有13种芳香胺类、34种... 详细信息

汽提净化水回用原油电脱盐是炼化企业重要的节水措施。本研究基于气相色谱-质谱和静电场轨道阱高分辨质谱组合分析,从微观层次上探究了汽提净化水回用电脱盐过程的溶解性有机物转移特征。电脱盐过程中,汽提净化水有13种芳香胺类、34种含氮杂环类、13种中长链烷基酚类和1种醚类化合物转移到油相,对油品品质影响轻微,对油品收率有所促进,同时可将电脱盐污水的有机负荷总量降低约50%。原油中的8种环烷酸类、7种含氧杂环类、3种短链烷基酚类、504种低不饱和度的O_(2)、O_(4)、O_(3)S_(1)和N_(1)O_(3)类以及186种高不饱和度的O_(4)S_(1)和N1O_(2)类化合物转移到水相,使得电脱盐污水的有机污染组成更为复杂,急性生物毒性更强。本研究对于掌握高浓度点源污水的水质特性、提高炼化企业污水管控水平具有指导意义。

关键词：汽提净化水原油电脱盐溶解性有机物转移特征静电场轨道阱高分辨质谱

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基于CT影像学特征构建原发性小肠淋巴瘤与间质瘤的鉴别诊断预测模型

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潍坊医学院学报 2024年第3期46卷 161-164页

作者：陈春茂孙西河山东第二医科大学医学影像学院山东潍坊261053 寿光市人民医院影像中心山东第二医科大学附属医院影像中心

目的探讨基于CT影像学特征构建的预测模型对原发性小肠淋巴瘤与间质瘤的鉴别诊断价值。方法选取经病理证实的原发性小肠淋巴瘤、间质瘤患者各50例,比较两组患者临床资料、CT影像学特征,采用二元Logistic回归分析等筛选出有鉴别意义的... 详细信息

目的探讨基于CT影像学特征构建的预测模型对原发性小肠淋巴瘤与间质瘤的鉴别诊断价值。方法选取经病理证实的原发性小肠淋巴瘤、间质瘤患者各50例,比较两组患者临床资料、CT影像学特征,采用二元Logistic回归分析等筛选出有鉴别意义的独立影响因素并构建鉴别诊断预测模型,绘制受试者工作特征(ROC)曲线,评价该预测模型的鉴别诊断价值。结果两组患者动脉期净强化CT值、病灶周围肿大淋巴结、血管漂浮征、病理血管比较,差异均有统计学意义(P<0.05),均是具有鉴别意义的独立影响因素(P<0.05),基于这4个CT影像学特征构建鉴别诊断预测模型,ROC曲线显示其AUC为0.971(95%CI:0.941-1.000),敏感度为0.92,特异度为0.96.结论基于CT影像学特征构建的预测模型对小肠淋巴瘤与间质瘤的鉴别诊断具有较高应用价值。

关键词：原发性小肠淋巴瘤胃肠道间质瘤鉴别诊断预测模型

Application of Fourier transform ion cyclotron resonance mass spectrometry in molecular characterization of dissolved organic matter

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Science China Earth Sciences 2022年第12期65卷 2219-2236页

作者： chen HE Ding HE chunmao chen Quan SHI State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Department of Ocean Science and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) The Hong Kong University of Science and TechnologyHong Kong 999077China

Dissolved organic matter(DOM)plays an important role in the global carbon cycle,and an in-depth analysis of its chemical composition is fundamental to the study of its environmental and biogeochemical behavior and *** is a complex mixture of organic substances,and determining its molecular composition is a long-standing challenge in the field of analytical *** development and application of Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS)has enabled the identification of the chemical composition of DOM at the molecular *** paper summarizes progress made in the molecular characterization of DOM based on the FT-ICR MS technique,including DOM sample pretreatment methods,mass spectrometry ionization techniques,data acquisition,data processing and presentation,and molecular structure *** on the work done by the instrument at the State Key Laboratory of Heavy Oil Processing in the China University of Petroleum,Beijing,we introduce applications of FT-ICR MS in the fields of earth science,environmental science and engineering,and look ahead to further research directions in the future.

关键词： Dissolved organic matter FT-ICR MS Molecular composition Recalcitrant dissolved organic matter High resolution mass spectrometry

Biomineralized nanoparticles for the immobilization and degradation of crude oil-contaminated soil

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Nano Research 2023年第10期16卷 12238-12245页

作者： Daoqing Liu Qianwei Li Enhui Liu Miao Zhang Jicheng Liu chunmao chen Key Laboratory of Water and Sediment Sciences(Ministry of Education) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Heavy Oil Processing State Key Laboratory of Petroleum Pollution ControlChina University of Petroleum(Beijing)Beijing 102249China

Accidental oil leaks and spills often cause server soil pollution,and in situ remediation is a powerful and economical treatment *** during in situ remediation process,unpredicted migration of petroleum hydrocarbon in heterogeneous soil will lead to a long-term source of persistent aquifer *** reduce the migration of petroleum hydrocarbon and effectively improve the in situ remediation efficiency,herein,fungal biomineralization strategy was proposed for the immobilization of petroleum contaminants.A ureolytic fungi strain with crude oil-degradation ability was screened and identified as Chaetomium *** incubated in medium containing Ca2+and crude oil,a mineral corona with spiny nanoparticles was formed at the edge of oil and the interface characters were analyzed using fluorescent pH and dissolved oxygen(DO)sensing films,*** indicated that biominerals preferred to aggregate around the edge of crude oil,providing favorable microenvironment for fungal growth and then leading to the increase of pH in the microenvironment,eventually accompanied by the formation of mineral *** mineral corona with numerous nanoparticles may act as a solid and stable shell,limiting or reducing the mobility of crude oil,and providing enough time for fungal *** 28 days incubation,oilcontaminated soil treated with fungal biomineralization showed better immobilization ability for total petroleum hydrocarbon(TPH)under simulated acid-rain condition and higher TPH removal *** is the first demonstration for the immobilization of oil through fungal biomineralized nanoparticles,thus providing a novel strategy for the in situ remediation of oilcontaminated sites.

关键词： biomineralization degradation nanomineral nanoaggregates immigration

Causes Leading to Formation of Shot Cokes and Measures for Its Prevention in Super Viscous Oil Delayed Coking Unit

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China Petroleum Processing & Petrochemical Technology 2007年第1期9卷 19-24页

作者： chen chunmao Zhang Feng Yan Guangxu Guo Shaohui State Key Laboratory for Heavy Oil Processing China University of Petroleum Beijing 102249 Liaohe Petrochemical Corporation of PetroChina Panjin 124002

Shot cokes are frequently formed in the delayed coking unit treating the super viscous oil at PetroChina＇s Liaohe Petrochemical Company. Considerable work has been carded out to avoid the formation of shot cokes. The test results obtained have shown that the property of super viscous oil has played a key role in the formation of shot cokes. After adjusting and optimizing the process indices the operating regime of the delayed coking unit at a throughput of 118t/h of the super viscous oil is specified as follows： a reaction temperature of 498-502℃, a reaction pressure of 0.17-0.25 MPa, a recycle ratio of 0.5-0.6 and a fractionation tower bottom temperature of 355-365 ℃. In the meantime, the delayed coking process has adopted measures to enhance pre-fractionation of the feedstock to rationally remove light fractions and maintain a steady gas velocity in order to avoid the formation of shot cokes.

关键词： delayed coking unit super viscous oil shot cokes preventive methods

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焦化废水生化尾水特征及其深度处理技术进展

工业水处理 2024年第3期44卷 10-23页

作者：李泽乙廖常盛柴云王庆宏詹亚力陈春茂陈发源中国石油大学(北京)化学工程与环境学院重质油全国重点实验室油气污染防治北京市重点实验室北京102249 龙源(北京)风电工程技术有限公司北京102206 达斯玛环境科技(北京)有限公司北京100176

焦化废水污染负荷高、有机污染物组成复杂、生物毒性强,是一类非常难处理的煤化工废水。经传统的“物化+生化”工艺处理后,其生化尾水中仍残留部分难降解有机物与一定的生物毒性,COD难以达到《炼焦化学工业污染物排放标准》(GB 16171—2... 详细信息

焦化废水污染负荷高、有机污染物组成复杂、生物毒性强,是一类非常难处理的煤化工废水。经传统的“物化+生化”工艺处理后,其生化尾水中仍残留部分难降解有机物与一定的生物毒性,COD难以达到《炼焦化学工业污染物排放标准》(GB 16171—2012)的限值要求,需进一步处理。分析了焦化废水生化尾水中的残余有机物和生物毒性特征,归纳总结了混凝、吸附、膜过滤等分离技术,Fenton、催化臭氧氧化、电磁强化氧化、过硫酸盐氧化与电化学氧化等转化技术及分离转化协同工艺对生化尾水中难降解有机物的去除效能和不同有机组分及生物毒性的变化规律,指出在认识水质特征与生物毒性转化规律的基础上,兼顾有机物高效去除和处理出水的生物安全性,开发协同组合工艺与短流程技术是焦化废水生化尾水深度处理技术的发展方向。

关键词：焦化废水生化尾水难降解有机物生物毒性深度处理。

好氧颗粒污泥处理长链二元酸发酵废水性能及微生物特征研究

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水处理技术 2024年第5期50卷 107-112页

作者：李巨峰黄子萌梁家豪王庆宏陈发源陈春茂中国石油集团安全环保技术研究院有限公司北京102206 陕西延长石油(集团)有限责任公司研究院陕西西安710075 重质油国家重点实验室油气污染防制北京市重点实验室中国石油大学(北京)北京102249 广东石油化工学院环境科学与工程学院广东省石油化工污染过程与控制重点实验室广东高校石油化工污染控制重点实验室广东茂名525000

采用序批式好氧颗粒污泥反应器处理长链二元酸废水,研究结果表明采用逐步降低废水稀释比的运行方式,40 d可完成反应器启动。成熟颗粒污泥的粒径大、稳定性高,颗粒完整性系数和粒径>0.9 mm的污泥比重分别达99.68%和75.5%。颗粒污泥具有... 详细信息

采用序批式好氧颗粒污泥反应器处理长链二元酸废水,研究结果表明采用逐步降低废水稀释比的运行方式,40 d可完成反应器启动。成熟颗粒污泥的粒径大、稳定性高,颗粒完整性系数和粒径>0.9 mm的污泥比重分别达99.68%和75.5%。颗粒污泥具有丰富的有机物降解菌毛单胞菌属和氧化硫奥托氏菌属,以及具有分泌EPS的除磷菌,可实现95.1%的COD和69.9%的总磷去除。该工艺在去除长链二元酸废水有机污染物和总磷方面具有优势,有良好的应用前景。

关键词：长链二元酸废水好氧颗粒污泥除磷微生物群落结构

The role and potential of attapulgite in catalytic pyrolysis of refinery waste activated sludge

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Petroleum Science 2022年第1期19卷 354-362页

作者： Qinghong Wang Kanghong Hao Chelsea Benally Yue Kou Zhexuan An Mohamed Gamal El-Din chunmao chen State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Oil and Gas Pollution ControlChina University of Petroleum-BeijingBeijing102249China Department of Civil and Environmental Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

Pyrolysis is a promising technology for the treatment of refinery waste activated sludge(rWAS).In this study,attapulgite as a natural clay was used to enhance the pyrolysis of *** yields,characteristics of pyrolytic products,pyrolytic kinetics and mechanisms were *** attapulgite improved the conversion of rWAS into non-condensable gases and pyrolytic *** bio-oil quality improved and the biochar yield *** average activation energy of Stage Ⅰ(230-400℃)and Stage Ⅱ(400-500℃)decreased by 36.5%and 49.7%,respectively,compared to rWAS ***_(2)O_(3)and Fe_(2)O_(3)in attapulgite enhanced the dealkylation reaction and cracking of C-C *** content of the gasoline(

关键词： Catalytic pyrolysis Attapulgite Kinetics Product characteristics