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SSRN 2022年

作者： Ren, Luotong Li, Gongsong Huang, Danping Wang, Zhenxi Xu, Sheng Chen, Siyu Chen, Xiaoguang College of Environmental Science and Engineering State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry Donghua University Shanghai201620 China Sichuan Provincial Key Lab of Process Equipment and Control School of mechanical engineering Sichuan University of Science & Engineering Zigong643000 China College of Sciences Nanchang Institute of Technology Nanchang330099 China

Anaerobic granular sludge determines the high-performance of the bioreactor. In order to elucidate its physical and chemical properties change for soybean wastewater over time and space and to determine its optimal loading conditions in the Spiral Symmetry Stream Anaerobic Bioreactor (SSSAB), a pilot-scale SSSAB was established over 216 days and was divided into three sections (C1, C2 and C3) from bottom to top. If the HRT was 7.62 h, the VRR was 27.17 kg COD·(m3·d)-1 and the OLR was 33.42 kg COD·(m3·d)-1. C1 was the major contributor for the COD removal efficiency and determined the overall stability of the SSSAB. The reaction temperature in C1, C2 and C3 changed regularly and was always suitable for the growth of microorganisms. The volumetric COD removal (VRR) and ammonia nitrogen increase (0.08, 0.13 and 0.20, respectively) with the increase in height. The anaerobic granular sludge showed excellent settlement performance in the particle size range of 1.0 ~ 2.0 mm. The MLVSS/MLSS value of C1, C2 and C3 increased over time and amounted to 0.792, 0.692, and 0.687, respectively. The trend of MLVSS of granular sludge was consistent with the COD removal in each section, indicating that the former directly affected the latter. It showed that the MLVSS, the porosity and the relative content of Fe and Na in the granular sludge tended to decrease as the height of SSSAB increased, while settling performance and mass transfer became progressively worse and volumetric efficiency and stability decreased along the bioreactor. © 2022, The Authors. All rights reserved.

关键词： Bioreactors

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Evaluation of a Green-Sustainable Industrialized Cleaner Utilization for Refractory Cyanide Tailings Containing Sulfur

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SSRN 2022年

作者： Li, Haoyu Wang, Jun Zhu, Xuejun Yang, Tao Deng, Jun Yan, Beilei Mao, Xuehua Yin, Shaohua Zhang, Yi Li, Shiwei School of Biological and Chemical Engineering Panzhihua University Sichuan Panzhihua617000 China Key Laboratory of Green Chemistry Sichuan Institutes of Higher Education Zigong Sichuan 643033 China Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Yunnan Kunming650093 China Sichuan Provincial Key Lab of Process Equipment and Control Sichuan Yibin64404 China Kunming University of Science and Technology China

In order to achieve the clean treatment of refractory cyanide tailings containing sulfur, a novel microwave-assisted chlorination thermal treatment recovery technology was proposed in this paper. On the basis of studying the mineralogy of cyanide tailings, the treatment capacity of common chlorinated agents for refractory cyanide tailings containing sulfur was compared. CaCl2 as the best chlorination agent, gold recovery and chlorine removal rates were 85.2% and 95%, under the optimal conditions. The specific action mechanism of CaCl2 in the process of microwave roasting was studied. Under the action of microwave, CaCl2 accelerated decomposition into chlorine-containing gas and rapidly diffused in cracks caused by thermal stress to ensure gold volatilization and chlorination. Finally, the approach and mechanism of removing residual harmful substances in roasting slag were proposed based on the environmental assessment of roasting slag. Environmental pollution and corrosion of building materials can be effectively avoided in the later transportation and secondary utilization of roasting slag. © 2022, The Authors. All rights reserved.

关键词： Chlorination

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Study on Microstructure Evolution Mechanism of Gradient Structure Surface of Aa7075 Aluminum Alloy by Ultrasonic Surface Rolling Treatment

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SSRN 2022年

作者： Fu, Lei Li, Xiulan Lin, Li Wang, Zhengguo Zhang, Yingqian Luo, Yunrong Yan, Shisen He, Chao Wang, Qingyuan School of Mechanical Engineering Sichuan University of Science & Engineering Zigong643000 China Failure Mechanics and Engineering Disaster Prevention Key Lab of Sichuan Province Sichuan University Chengdu610065 China School of Aeronautics and Astronautics Sichuan University Chengdu610065 China School of Material Science and Engineering Sichuan University of Science & Engineering Zigong643000 China Sichuan Provincial Key Lab of Process Equipment and Control Zigong643000 China School of Civil Engineering Sichuan University of Science & Engineering Zigong643000 China Institute for Advanced Materials Deformation and Damage from Multi-Scale China

The ultrasonic surface rolling treatment (USRT) was used to prepare aluminum alloy 7075 (AA7075) samples with a surface gradient structure. Microstructural evolution mechanism of the deformation layers on the gradient structure was studied by XRD, SEM, and TEM. The results show that the dislocation slip dominates the grain refinement process, and it follows the continuous cutting and refinement of dislocation cells, subgrains, and fragmentation of the second precipitates. The grain refinement on the surface layer of samples with gradient structure provides a theoretical foundation for the surface grain refinement and nanocrystallization of precipitation-strengthened aluminum alloy. © 2022, The Authors. All rights reserved.

关键词： Grain refinement

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Preparation and physical properties of polyethylene/carbon nanotubes/nanosilver composite 4

Preparation and physical properties of polyethylene/carbon n...

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2020 4th International Conference on Material Science and Technology, ICMST 2020

作者： Ge, Feifan Yao, Wei-Hua Lin, Xu Chen, Jui-Chin Jiang, Lin Tsou, Chi-Hui Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan Provincial Key Laboratory of Process Equipment and Control College of Materials Science and Engineering Sichuan University of Science and Engineering Zigong643000 China Department of Materials and Textiles Oriental Institute of Technology New Taipei City22061 Taiwan Zigong Fourth People's Hospital Zigong643000 China Sichuan Zhirenfa Environmental Protection Technology Co. Ltd. 64300 China Sichuan Zhixiangyi Technology Co. Ltd. Chengdu610051 China

In this paper, nanosilver and carbon nanotubes was melt blended with HDPE and pet respectively to prepare HDPE/CNT/nanosilver and PET/CNT/nanosilver composites with antibacterial effect. After the preparation of samples, SEM, DSC, TGA, mechanical properties and antibacterial properties were tested. The possibility of preparing new materials by this method is studied. Compared with pure HDPE, when the content of CNT/nanosilver is 0.1 phr, the tensile strength of HDPE/CNT/nanosilver composite reach to the max value. © 2020 Institute of Physics Publishing. All rights reserved.

关键词： High density polyethylenes

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Noise comparison of centrifugal pump operating in pump and turbine mode

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Journal of Central South University 2018年第11期25卷 2733-2753页

作者： DONG Liang DAI Cui LIN Hai-bo CHEN Yi-ping Research Center of Fluid Machinery Engineering and Technology Jiangsu University School of Energy and Power Engineering Jiangsu University Sichuan Provincial Key Lab of Process Equipment and Control Sichuan University of Science & Engineering

Investigations regarding the relation of noise performance for centrifugal pump operating in pump and turbine modes continue to be *** paper presents a series of comparisons of flow-induced noise for both operation *** interior flow-borne noise and structure modal were verified through *** flow-borne noise was calculated by the acoustic boundary element method(ABEM),and the flow-induced structure noise was obtained by the coupled acoustic boundary element method(ABEM)/structure finite element method(SFEM).The results show that in pump mode,the pressure fluctuation in the volute is comparable to that in the outlet pipe,but in turbine mode,the pressure fluctuation in the impeller is comparable to that in the draft *** main frequency of interior flow-borne noise lies at blade passing frequency(BPF)and it shifts to the 9th BPF for interior flow-induced structure *** peak values at horizontal plane appear at the 5th BPF,and at axial plane,they get the highest sound pressure level(SPL)at the 8th *** with interior noise,the SPL of exterior flow-induced structure noise is incredibly *** the 5th BPF,the pump body,cover and suspension show higher SPL in both *** outer walls of turbine generate relatively larger SPL than those of the pump.

关键词： centrifugal pump as turbine noise performance acoustic boundary element method acoustic finite element method

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Research on Current Situation and Countermeasures of sichuan New Energy Automobile Industry Development

Research on Current Situation and Countermeasures of Sichuan...

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2018 3rd International Conference on control, Automation and Artificial Intelligence (CAAI 2018)

作者： Tao Yang Yinghua Liao Dehui Zhao Sichuan University of Science & Engineering Sichuan Provincial Key Laboratory of Process Equipment and Control Engineering

Based on the situation of the development of new energy automobile industry in sichuan Province, this article analyzes the problems in the development, demonstration and popularization of new energy vehicle industry. Combining sichuan's "13 th Five-Year Plan" strategic emerging industries planning, it puts forward three Countermeasures and Suggestions to speed up the development of new energy automobile industry in sichuan Province. First, break through the core technologies under the guidance of government and cooperation between schools and enterprises. Second, promote the competitiveness of backbone enterprises in sichuan Province and innovate the popularization modes of the market. The last suggestion is to improve the structure of the industry and complete the construction of components supporting system to realize the healthy and sustainable development of the whole automobile industry in sichuan Province.

关键词： new energy automobile industry status supporting system

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Preparation and Physical Properties of Polyethylene/Carbon Nanotubes/Nanosilver Composite

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IOP Conference Series: Materials Science and engineering 2020年第1期774卷

作者： Feifan Ge Wei-Hua Yao Xu Lin Jui-Chin-Chen Lin Jiang Chi-Hui Tsou Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan Provincial Key Laboratory of Process Equipment and Control College of Materials Science and Engineering Sichuan University of Science and Engineering Zigong 643000 China Department of Materials and Textiles Oriental Institute of Technology New Taipei City 22061 Taiwan ROC Zigong Fourth People's Hospital Zigong 643000 China Sichuan zhirenfa Environmental Protection Technology Co. Ltd 64300 China Sichuan Zhixiangyi Technology Co. Ltd. Chengdu 610051 China

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Why synthesizing poly(1,4-phenylene sulfide) through oxidative polymerization has not so far been adopted as the industrial process

Why synthesizing poly(1,4-phenylene sulfide) through oxidati...

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Spring International Conference on Material Sciences and Technology, MST-S 2017

作者： Liu, Yefeng Li, Yanfen Yan, Xiaolan Yan, Jie Li, Minjiao Cui, Yishun School of Chemical Engineering Sichuan University of Science & Engineering ZigongSichuan643000 China Sichuan Provincial Key Lab of Process Equipment and Control Sichuan University of Science & Engineering ZigongSichuan643000 China Material Corrosion and Protection Key Laboratory of Sichuan province Sichuan University of Science & Engineering ZigongSichuan643000 China

ISBN: (纸本)9783035710939

Synthesis of poly (1, 4-phenylene sulfide) (PPS) through oxidative polymerization seems promising to us. Comparing with current commercial method to poly (1, 4-phenylene sulfide) from 1, 4-phenylene sulfide and sodium sulfide (Phillips’ Method), there are many advantages of the oxidative polymerization method. For example, it can synthesize PPS at normal temperature and pressure;the yield of reaction is very high;it provides pure PPS without salt contamination. However, several years have passed away;synthesis of poly (1, 4-phenylene sulfide) through oxidative polymerization has not so far been adopted as the industrial process. Many of us are puzzled, why? Through studying all kinds of reported preparation route to poly (1, 4-phenylene sulfide) through oxidative polymerization compared to Phillips’ Method, a generic polymerization mechanism is achieved for most of them excepting two with obvious shortcomings. We suddenly realize that synthesis of poly (1, 4-phenylene sulfide) through oxidative polymerization seems unsuitable to be used in industrial production recently because of its own limits. © 2017 Trans Tech Publications, Switzerland.

关键词： Sulfur compounds

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Conceptual Innovation Design of Novel Intelligent Bicycle Based on Theory of Inventive Problem Solving

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Journal of Beijing Institute of Technology (English Edition) 2017年 26卷 16-20页

作者： Xu, Wenna Hu, Guangzhong Li, Xia School of Mechanical Engineering Sichuan University of Science and Engineering ZigongSichuan643000 China Sichuan Provincial Key Lab of Process Equipment and Control Sichuan University of Science and Engineering ZigongSichuan643000 China

The innovative designs of bicycle have attracted attentions of many researchers. To deal with the shortcomings of insufficient power, single function and low efficiency of energy saving, a conceptual innovation design based on theory of inventive problem solving (TRIZ) is proposed in this *** problem models can be transformed into technical contradiction for establishing the functional unit models of ***, the improving parameters and worsening parameters are systematically analyzed to obtain the recommended innovative principles from contradiction matrix. Moreover, three typical innovative principles are employed for improving the design effects. The results show that the TRIZ based innovative design methods can improve the design efficiency and shorten development cycles directly. © 2017 Editorial Department of Journal of Beijing Institute of Technology.

关键词： Bicycles

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Lithium-ion Battery State of Charge/State of Health Estimation Using SMO for EVs

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Energy Procedia 2017年 105卷 4383-4388页

作者： Cheng Lin Jilei Xing Aihua Tang National Engineering Laboratory for Electric Vehicles and Collaborative Innovation Center of Electric Vehicles in Beijing School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China Sichuan Provincial Key Lab of Process Equipment and Control School of Mechanical Engineering Sichuan University of Science & Engineering Zigong 643000 China

Advanced battery management systems (BMS) in electric vehicles (EVs) require immediate and accurate battery state, such as State-of-Charge (SoC) and State-of-Health (SoH) for efficient monitoring and control. To improve the state estimation performance of battery, an electrochemical model is applied in this paper. First, the electrochemical model is reduced to describe the instantaneous Li-ion concentration dynamics of each electrode sufficiently without main information loss. Second, two separate sliding mode observers (SMOs) combined with reduced order electrochemical model are designed to identify SoC/SoH of lithium-ion cell from external measured voltage and current value. An estimation scheme which is comprised of two subestimators is designed. They work jointly: one separate sliding mode observer (SMO) for SoC estimation using Li-ion solid-electrolyte concentration and the other observer for cell contact resistance adopting Lyapunov's stability theory. Finally, in order to demonstrate the performance of proposed scheme, the simulations are verified by experiments from a 2.3Ah high-power LiFePO 4 /graphite cell used in EVs. The results indicate that the proposed estimation scheme with the SMO algorithm performs well with initial error values. The maximum SoC and SoH estimation error are less than 3% and 2.5% under Urban Dynamometer Driving Schedule (UDDS) drive cycles.

关键词： electric vehicles (EVs) State-of-Charge (SoC) State-of-Health (SoH) sliding mode observers (SMO) electrochemical model

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