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Frontiers of Environmental Science & engineering 2024年第1期18卷 49-58页

作者： Xin Tang Yin Ye Chunlin Wang Bingqian Wang Zemin qin Cui Li yanlong Chen Yuheng Wang Zhiling Li Miao Lv Aijie Wang Fan Chen School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China School of Materials Science and engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Faculty of Geosciences and Environmental engineering Southwest Jiaotong UniversityChengdu 611756China

The extraction of uranium (U) from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources. Microbial reduction of soluble hexavalent uranium (U(VI)) to insoluble tetravalent uranium (U(IV)) holds immense potential for this purpose, but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U. To address these challenges, we present a novel spontaneous microbial electrochemical (SMEC) method that spatially decoupled the microbial oxidation reaction and the U(VI) reduction reaction. Our results demonstrated stable and efficient U extraction with net electrical energy production, which was achieved with both synthetic and real wastewater. U(VI) removal occurred via diffusion-controlled U(VI)-to-U(IV) reduction-precipitation at the cathode, and the UIVO_(2) deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(VI) reduction. Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer, energy metabolism, the TCA cycle, and acetate metabolism, which indicated the ectopic reduction of U(VI) at the cathode. Our study represents a significant advancement in the cost-effective recovery of U from U(VI)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

关键词： U(VI)bioreduction Electricity production Reaction decoupling Uranium-bearing wastewater Biofilm microbiome

Effect of secondary air on NO emission in a 440 t/h circulating fluidized bed boiler based on CPFD method

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Particuology 2023年第12期83卷 18-31页

作者： Hongpeng Liu Haiwen Sun Ye Bi Chunxia Jia Lei Zhang yanlong Li Hong qin qing Wang engineering research Centre of Oil Shale Comprehensive Utilization Ministry of EducationSchool of Energy and Power EngineeringNortheast Electric Power UniversityJilin132012China Department of Chemical&Biological engineering University of British ColumbiaVancouverV6T1Z3Canada Northeast Branch of Huadian Electric Power research institute Co. LtdShenyang110000China

The 440 t/h circulating fluidized bed boiler was numerically simulated by the Computational Particle Fluid Dynamics(CPFD)*** combustion characteristics of circulating fluidized bed boiler and the effect of secondary air on NO emission were *** full-scale three-dimensional model of a 440 t/h circulating fluidized bed boiler was *** rationality of the grid was validated by the experimental data of material layer *** accuracy of the simulation was validated by measuring the temperature of each measuring point in the dense phase *** combustion conditions in the furnace under different setting modes were *** effects of secondary air rates on NO formation in fluidized bed were *** results show that when the secondary air rate increases to 27%,the proper secondary air rate has a positive effect on the inhibition of NO generation,and the proper strengthening of the central air supply will improve the permeability of the secondary air and make the combustion more uniform and *** the secondary air rate increases to 33%,excessive improvement of air classification and central air distribution will affect the stability of circulating fluidized bed ***,air classification and strengthening of central air supply can be used together to inhibit the generation of NO.

关键词： Circulatingfluidized bed Low nitrogen combustion Computational particlefluid dynamics (CPFD) Numerical simulation Secondary air

New sustainable polymers with on-demand depolymerization property

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Science China Chemistry 2024年第9期67卷 2803-2841页

作者： Yangyang Sun Zesheng An Yanshan Gao Rongrong Hu Ye Liu Hua Lu Xiao-Bing Lu Xuan Pang Anjun qin Yong Shen Youhua Tao Yu-Zhong Wang Junpeng Wang Gang Wu Guang-Peng Wu Tie-Qi Xu Xing-Hong Zhang Yuetao Zhang Zhenbiao Zhang Jian-Bo Zhu Miao Hong Zhibo Li State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China State Key Laboratory Base of Eco-Chemical engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsDalian University of TechnologyDalian 116024China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)College of ChemistryState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China School of Polymer Science and Polymer engineering the University of AkronAkronOH 44325USA MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State and Local Joint engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

To combat the crisis of today's synthetic polymers arising from unsustainable production and disposal,it is essential for the synthetic polymer community to reshape the current polymer industry with sustainable *** an emerging class of sustainable polymers,the development of chemically depolymerizable polymers(CDPs),which can undergo closed-loop depolymerization/repolymerization cycles to reproduce virgin polymers without the loss of properties from recovered monomers,offers an ideal solution to preserve finite natural resources,provides a feasible solution to the end-of-life issue of polymer waste,and thereby establishes a circular materials ***,two grand key challenges have been encountered in the establishment of practically useful CDPs:how to balance polymerization and depolymerization ability and how to unify conflicted depolymerizability and physical ***,this critical review article presents our vision for summarizing feasible strategies to overcome the above two significant challenges and the design principles for constructing an ideal CDP by highlighting selected major progress made in this rapidly expanding field.

关键词： chemically depolymerizable polymers sustainable polymers depolymerization monomer recovery degradation plastics

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DN750料流调节阀结构分析及优化

机械设计与制造 2024年第6期400卷 38-41页

作者：黎华盖晓明黎勤河北省智能炉顶装备工程研究中心秦皇岛秦冶重工有限公司河北秦皇岛066038 渤海钻探工程技术研究院河北任丘062550

炉顶装料装置经历了由钟式炉顶到无料钟炉顶的发展过程,无料钟炉顶能准确地布出满足高炉生产要求的料面形状。料流调节阀是无料钟炉顶精确调节布料速度的唯一手段,其开度值和开口形状直接影响高炉布料的合理性与均匀性,针对料流调节阀... 详细信息

炉顶装料装置经历了由钟式炉顶到无料钟炉顶的发展过程,无料钟炉顶能准确地布出满足高炉生产要求的料面形状。料流调节阀是无料钟炉顶精确调节布料速度的唯一手段,其开度值和开口形状直接影响高炉布料的合理性与均匀性,针对料流调节阀的结构特点、工作原理及其传动机构进行分析研究,得出内外阀板的轨迹方程和设计的关键点,并对传动机构进行优化,给出一个料流阀阀板传动机构优化的理论计算依据,对无料钟炉顶料流调节阀设计选型提供了设计思路。

关键词：料流调节阀传动机构轨迹方程刃口形状

Study on Bamboo Treatment technology with CuAz Preservative

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Chinese Forestry Science and technology 2008年第3期7卷 61-64页

作者： qin Shaoshan 1, 2 LIU yanlong 1 LIU Junliang 1 1.College of Transportation and Civil engineering, Beihua University, Jilin132013, P.R.China 2. research institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, P.R.China

In order to research the effect of preservative penetrability, CuAz (copper azole) was used for the preservative, and pieces of Moso bamboo (Phyllostachys pubescens) were used for the experimental materials in this study. The vacuum pressure process was used to treat bamboo pieces. The results showed as follows: 1) Main treatment factors were preservative concentration and applied pressure; 2) In the same technology, both the retention and the weight proportion gain of the samples without node were less than those of ones with node, due to special structure of bamboo node; 3) For the samples without node, a good result could be gotten when the preservative concentration was from 1% to 2%, treatment pressure was 0.6 MPa, and treatment time was 30 min. And for the bamboo samples with node, a good result can be gotten when the concentration was 2%, treatment pressure was 0.4 MPa, and treatment time was 30 min. This study demonstrates that the interaction between preservative and bamboo can be improved by adjusting the parameters.

关键词： CuAz Moso bamboo (Phyllostachys pubescens) preservation treatment penetrability vacuum pressure process

四川盆地南部下寒武统筇竹寺组页岩孔隙结构特征与页岩气赋存模式

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天然气工业 2024年第3期44卷 131-142页

作者：梁峰吴伟张琴罗超王玉满刘宇姜巍卢斌中国石油勘探开发研究院国家能源页岩气研发(实验)中心中国石油西南油气田公司页岩气研究院中国矿业大学(北京) 中国石油集团川庆钻探工程有限公司

近年来,四川盆地南部地区(以下简称川南地区)下寒武统筇竹寺组页岩气勘探开发取得了实质性的突破,但是,关于筇竹寺组页岩气储层孔隙结构特征及其对页岩气赋存模式影响的研究还较为薄弱。为此,以川南地区W207井筇竹寺组页岩为例,以总有... 详细信息

近年来,四川盆地南部地区(以下简称川南地区)下寒武统筇竹寺组页岩气勘探开发取得了实质性的突破,但是,关于筇竹寺组页岩气储层孔隙结构特征及其对页岩气赋存模式影响的研究还较为薄弱。为此,以川南地区W207井筇竹寺组页岩为例,以总有机碳含量(TOC)不小于1.0%为界,将筇竹寺组页岩划分出4个高有机碳页岩层段(H1—H4层),并基于大视域扫描电镜、流体注入法孔隙定量表征、三维分子结构建模与分子模拟等方法,研究了不同富有机质层段页岩孔隙特征,并着重分析了H3层页岩孔隙发育特征与页岩气赋存模式。研究结果表明:(1)筇竹寺组页岩纵向上孔隙发育差异较大,其中H3层页岩孔隙系统最为有利,发育粒缘缝—有机质纳米连通孔隙—有机质基质分子内孔隙3级孔隙网络,其矿物粒缘缝与有机质纳米孔隙提供了较大的游离气储集空间,页岩有机质分子结构中普遍发育微孔,提供了较大的吸附空间;(2)微孔对总吸附量的贡献随压力增高而降低,但在30.0 MPa时仍贡献了56%以上的总吸附气量;(3)高温高压下(30.0 MPa、70℃),页岩中游离气甲烷含量占总含气量的57%,当压力由30.0 MPa降低至16.5 MPa,游离气贡献总开采气量超过80%;(4)粒缘缝、有机质纳米连通孔隙和有机质基质分子内孔隙良好的配置关系为页岩气富集及开发提供了良好的连通体系,远离风化壳的超压层段有利于页岩孔隙发育。结论认为,川南地区筇竹寺组H3层页岩孔隙系统发育,具备页岩气高产地质条件,是筇竹寺组下一步重点关注层段,在此基础上寻找远离风化壳、孔隙发育的超压页岩储层是筇竹寺组选区选层的关键。

关键词：四川盆地南部下寒武统筇竹寺组甜点段孔裂隙系统分子结构页岩游离气页岩气赋存模式

Edge localized modes suppression via edge E × B velocity shear induced by RF sheath of ion cyclotron resonance heating in EAST

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Science China(Physics,Mechanics & Astronomy) 2022年第3期65卷 71-76页

作者： XinJun Zhang Chu Zhou XiaoLan Zou TianYang Xia yanlong Li ChengMing qin XianZu Gong qing Zang MingHui Li Tao Zhang ShouXin Wang Haiqing Liu Guillaume Urbanczyk Adi Liu YanMing Duan YanPing Zhao JinPing Qian Robert Isaac Pinsker MinYou Ye BaoNian Wan institute of Plasma Physics Chinese Academy of Sciences(ASIPP)Hefei 230031China School of Nuclear Sciences and technology University of Science and Technology of ChinaHefei 230026China CEA IRFMSaint-Paul-les-Durance F-13108France Key Laboratory of Optoelectronic Devices and Systems College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China General Atomics San Diego CA 92186-5608USA

The control of large edge localized modes(ELMs) is a critical issue for the successful operation of future burning plasma devices,such as the international thermonuclear experimental reactor(ITER) and China fusion engineering test reactor(CFETR). In this paper, we present a new active and effective means of ELM suppression using ion cyclotron resonant heating(ICRH) on the experimental advanced superconducting tokamak(EAST). We obtained the key role of the external E × B velocity shear near the pedestal top and the scrape-off-layer(SOL) induced by the RF sheath potential of ICRH in ELM suppression. The experimental results showed a positive correlation between the RF sheath and the E × B shear rate in SOL. BOUT++ simulations indicate that increased E × B velocity shear rates in the pedestal and SOL regions promote ELM suppression;thereby, supporting the experimental observations on EAST. These findings suggest a new simple approach to access the ELM suppressed regimes in plasma with low torque input as ITER baseline discharges.

关键词： ion cyclotron resonant heating RF sheath edge localized mode suppression E×B velocity shear

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天然气中水含量与水露点换算关系探讨

石油与天然气化工 2024年第3期53卷 123-129页

作者：敬豪曾文平何斌张镨秦婧中国石油西南油气田公司天然气研究院国家市场监管重点实验室(天然气质量控制和能量计量) 中国石油天然气集团有限公司天然气质量控制和能量计量重点实验室中国石油西南油气田公司天然气净化总厂

目的采用实验加数学拟合的方法开发一种新型天然气中水含量与水露点的换算方法,以提高换算精度并降低误差。方法综合应用气体标准物质、便携式冷镜仪以及数学软件Matlab,采用三次样条插值技术建立了一种新型水含量与水露点换算方法。结... 详细信息

目的采用实验加数学拟合的方法开发一种新型天然气中水含量与水露点的换算方法,以提高换算精度并降低误差。方法综合应用气体标准物质、便携式冷镜仪以及数学软件Matlab,采用三次样条插值技术建立了一种新型水含量与水露点换算方法。结果利用三次样条插值技术建立拟合曲面方法进行水露点换算,该方法的平均绝对误差(MAE)为1.16℃,均方根误差(RMSE)为2.28℃,满足合理可接受的最大偏差为2.8℃。将该方法与国内外主流的换算方法进行比较分析,3种方法的平均绝对偏差分别为0.46%(三次样条插值法)、0.69%(GB/T 22634-2008《天然气水含量与水露点之间的换算》)和0.84%(ASTM D1142-95(2021)《露点温度法测定气体燃烧水蒸气含量的标准试验方法》),并分析探究了3种方法在不同水含量和压力段的适用情况。结论通过与实验值的对比研究,当水的体积分数在0~200×10-6范围内时,三次样条插值法相比标准方法具有更好的换算精度,可有效降低水含量与水露点的换算误差。

关键词：天然气水含量水露点三次样条插值

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三段制圆弧轨道设计参数的谱集计算

石油学报 2024年第4期45卷 708-717页

作者：王海涛郑鹏邓青山孙立伟鲁港孟庆安覃吉昆仑数智科技有限责任公司北京100043 中国石油渤海钻探工程有限公司定向井技术服务分公司天津300280 中国石油渤海钻探工程有限公司第三钻井工程分公司天津300280 中国石油长城钻探工程有限公司工程技术研究院辽宁盘锦124010

为了解决井眼轨道设计中设计参数输入“试凑”问题,发展了设计参数谱集计算的数值算法。以二分法为基础,推导出了两个设计参数各自的整体允许范围的算法,以及当一个设计参数给定时另一个设计参数允许范围的算法,使用这些算法能有效地计... 详细信息

为了解决井眼轨道设计中设计参数输入“试凑”问题,发展了设计参数谱集计算的数值算法。以二分法为基础,推导出了两个设计参数各自的整体允许范围的算法,以及当一个设计参数给定时另一个设计参数允许范围的算法,使用这些算法能有效地计算出谱集边界,从而绘制出设计参数谱集图形。进一步证明了谱集结构定理:三段制设计参数谱集由一个二维有界连通闭集或者不相交的多个二维有界连通闭集的并集组成。数值算例的计算结果表明,谱集计算算法能求出连通和不连通等各种情况的谱集边界。谱集计算算法在井眼轨道设计软件中可为软件用户提供可视化的设计参数选择数值范围,提高设计效率。

关键词：定向钻井井眼轨道三段制谱集二分法