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Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Zhang Chunhui he xuwen Zhu Shuquan Wang Xiaochan Zhuang Honglei China Univ Min & Technol Sch Chem & Environm Engn Beijing Peoples R China Beijing Sinorichen Environm Protect Co Ltd Beijing Peoples R China

ISBN: (纸本)9781424462551

China enjoys rich lignite resources. However, the development and utilization level of lignite in China is low compared with other countries. The lignite in China is distributed mainly in the eastern areas of Inner Mongolia and in the northeast provinces. The characteristics of China's lignite are closely related to its coal-forming age. Due to the shallow buried coal seams, most parts of the lignite coalfields in China use adit or inclined shaft mining. In China, the application of lignite includes combustion for power generation, pyrolysis and coking, liquefaction, gasification and preparation of wax etc..

关键词： Lignite Distribution Character Utilization

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Advanced Treatment of Acrylic Fiber Manufacturing Wastewater Using Electrochemical Oxidation

Advanced Treatment of Acrylic Fiber Manufacturing Wastewater...

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2011 International Symposium on Water Resource and Environmental Protection(ISWREP 2011)

作者： xuwen he Jianlong Hu Jianbing Wang Chunhui Zhang Chunrong Wang Xiong he School of Chemical and Environmental Engineering China University of Mining and Technology (Beijing)

ISBN: (纸本)9781612843377

Based on the characteristic of acrylic fiber manufacturing wastewater (AFMW),such as containing toxic and bio-refractory pollutants,the electrochemical oxidation is employed as an advanced treatment method,and the operating conditions such as current density,NaCl concentration,initial pH,are *** addition,the bio-degradability prior to and after electrochemical treatment is *** the optimal operating parameters of current density 10 mA/cm2,NaCl concentration 2 g/L,pH 7.1,the ammonia (NH3-N) and chemical oxygen demand (COD) are reduced by 100% and 50.8%,*** the condition of current density exceeds 10 mA/cm2 or NaCl concentration exceeds 2 g/L,the increment of current density and NaCl concentration accelerate the NH3-N remove process,but it can not greatly enhance the COD removal efficiency of electrochemical *** neutral pH condition is optimal for COD removal.

关键词： electrochemical oxidation,acrylic fiber manufacturing wastewater,COD removal,NH3-N removal

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On the Best Condition of Electrolysis Coking Wastewater by Orthogonal Method

On the Best Condition of Electrolysis Coking Wastewater by O...

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International Conference on Advances in Computer Science, Environment, Ecoinformatics, and Education

作者： he, xuwen Xin, Lu Zhang, Chunhui Lin, Hui Liu, Liyuan Zhang, Jingjing he, Xiong China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China

ISBN: (纸本)9783642233234

Coking wastewater was advanced treated by electrolytic experiment. Through the orthogonal method, we found out the optimum experimental condition as current density 20 mA/cm2, electrode plate span 1cm, electrolytic time 60 min, PH 7 and electrical conductivity 8000 mu s/cm. The removal rates of COD, NH3-N and phenol were 58.62%, 89.9% and 96.8% respectively and the corresponding concentrations were 97.78mg/L, 14.3mg/L and 0.43mg/L respectively, which can meet first discharge standard of GB 13456-1992.

关键词： The orthogonal method electrolysis coking wastewater advanced treatment

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RETRACTED ARTICLE: The cleaner production of lignite by hot press upgrading

RETRACTED ARTICLE: The cleaner production of lignite by hot ...

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作者： Zhang, Chunhui he, xuwen Zhu, Shuquan Wang, Xiaochan Zhuang, Honglei School of Chemical and Environmental Engineering China University of Mining and Technology Beijing China Beijing Sinorichen Environmental Protection Co. Ltd. Beijing China

ISBN: (纸本)9781424450893

This paper introduces the cleaner production processes of Hot Press Upgrading (HPU). Tail gas and lignite-derived water are created during the HPU process. When treated by the combined process of 'A2/O + Ozone oxidation + UBAF', the quality of the lignite-derived water can meet China's reuse standard for the power plant's circulating cooling water. After separation by the two-stage cyclone separator, a sintered metal powder filter treats the tail gas produced from the HPU process. After the above treatment, the tail gas's removal efficiency exceeds 99.5%. © 2011 IEEE.

关键词： Presses (machine tools)

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Titanium positive plate manufacturing process and denitrification mechanism

Titanium positive plate manufacturing process and denitrific...

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International Conference on Advances in Materials and Manufacturing Processes

作者： Zhang, Liping Ke, Lei Xie, Miaomiao Guo, Yuanjie Hu, Qianyu he, xuwen China Univ Min & Technol Inst Chem & Environm Engn Beijing 100083 Peoples R China

ISBN: (纸本)9780878492015

Prepared a electrode with high concentration and strong active oxidizing property which used titanium as anode's substrate material, used gradient method the anode surface was coated with a definite ratio RuO(2), TiO(2), IrO(2), SnO(2), Ga and Ce in order to extend the operational life span. Use scanning electron microscope to present the surface property, the result shows that the surface coat of self-made titanium positive plate is densification and well-distributed which has good catalytic activity and reaction stability, meanwhile the surface coated with metallic oxides has less and short cracks which can extend the useful life. Through the electrochemistry property detection by electrochemistry workstation, Tafel curve shows that the chlorine precipitation potential is 1.41V which is just a little higher than the standard potential 1.36v of Cl(-) reacting to form Cl(2), meanwhile lower than the oxygen precipitation potential, these shows that the plate has good electro-catalysis property and selectivity. The self-made experimental setup includes four parts as direct supply, reactive tank, electrode, collecting bottle. Prepared solution with deionized water and analytical pure agents with NH(4)Cl and NaCl, with draining water method collecting the electro-catalysis gas and gas chromatographic analysis shows the main component includes N(2) 62.73%, O(2) 21.47%, H(2) 13.95%, Cl(2) 1.85%, meanwhile analysis the trends of nitrogen forms concentration, chloridion concentration and pH by electrolysis time, concluding that the indirect oxidation is dominant process during electrochemistry, active substrate OCl(-) is the principal oxidation. The electrolyte pH keeps range between 7.5 and 9.5 which is favorable to free ammonia forming that can be directly electrochemical oxidized, meanwhile is disadvantage of free chlorine forming that can keep cyclic utilization in solution.

关键词： Titanium Positive Plate Electrochemistry Gradient Method Chlorine Precipitation Potential Denitrification Mechanism

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Research on nitrogen removal of secondary effluent of wastewater treatment plant in horizontal subsurface-flow constructed wetlands

Research on nitrogen removal of secondary effluent of wastew...

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2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011

作者： he, xuwen Chai, Zhen Wang, Hao he, Xiong Liu, Liyuan Jia, Jianli Wang, Jianbing School of Chemical and Environmental Engineering China University of Mining and Technology Beijing Beijing China

ISBN: (纸本)9781424491711

By investigating the nitrogen concentrations in effluents of the horizontal subsurface-flow constructed wetlands under the conditions of different kinds of substrates, residence time and heights, as well as the nitrogen concentrations changes along the flow in the wetlands, the nitrogen removal routes in the wetlands were analyzed. The results demonstrated that the wetland system with zeolites demonstrated greater efficiency in the removal of nitrogen. There was a higher nitrogen removal rates at the bottom of the wetland system owing to an aerobic-anoxic environment. In that a more efficient reoxygenation was attained at the front of the system, it achieved a higher nitrogen removal rates. © 2011 IEEE.

关键词： Nitrogen removal

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钢渣-灰岩人工湿地去除生活污水中的氮素

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水处理技术 2011年第9期37卷 109-112页

作者：黄玲何绪文华北科技学院北京101601 中国矿业大学(北京) 北京100083

构建小试系统研究了钢渣-灰岩人工湿地对生活污水中氮素的去除效果,分析了填料填铺方式和表层填料对湿地去除生活污水氮素效果的影响,并建立了钢渣-灰岩人工湿地转化氮素的数学模型。结果表明,当原水平均氨氮、TN的质量浓度分别为257.7... 详细信息

构建小试系统研究了钢渣-灰岩人工湿地对生活污水中氮素的去除效果,分析了填料填铺方式和表层填料对湿地去除生活污水氮素效果的影响,并建立了钢渣-灰岩人工湿地转化氮素的数学模型。结果表明,当原水平均氨氮、TN的质量浓度分别为257.7和398.4 mg.L-1时,钢渣-灰岩垂直潜流人工湿地出流氨氮和TN的质量浓度可分别降至13.57和62.83 mg.L-1;大级配差的正反粒径混合填铺的填料结构和渗透性良好的表层填料更有利于钢渣-灰岩人工湿地降解氮素效果;钢渣-灰岩垂直潜流人工湿地处理系统对氮素的去除规律较好符合1级反应动力学方程。

关键词：人工湿地生活污水氮钢渣灰岩

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Nano-materials Coupled with Non-thermal Plasma Application in Environmental Protection

Nano-materials Coupled with Non-thermal Plasma Application i...

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International Conference on Advanced Engineering Materials and Technology (AEMT2011)International Conference on Civil Engineering and Building Materials (CEBM 2011)

作者： Zhu Tao Wan Yandong Fang Yan Chen Xu Xu Dongyao he xuwen Shu Xinqian China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China

ISBN: (纸本)9783037851920

Nano-catalyst was prepared in the lab. Non-thermal plasma was generated by dielectric barrier discharge (DBD). Through nano-catalyst coupled with non-thermal plasma, a series of experiments for toluene decomposition were carried out. Based on reactor input energy density and removal efficiency and energy efficiency and inhibition for O-3 formation, the load amount MnOx catalyst on the surface of gamma-Al2O3 pellets were compared in the experiment. The results show the catalysis performance of 10 wt% MnOx/gamma-Al2O3 coupled with non-thermal plasma resulted in higher removal efficiency of toluene and better energy efficiency. At the same time, 10 wt% MnOx/gamma-Al2O3 operated on a better inhibition for O-3 formation in the gas exhaust.

关键词： Nano-catalyst Plasma Environmental Energy density Efficiency

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广州地区地毯式屋顶绿化植物筛选及其评价

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热带农业科学 2014年第12期34卷 98-104页

作者：张继方张俊涛刘文王伟贺漫媚李许文代色平广州市园林科学研究所/广州市景观建筑重点实验室广东广州510405

通过对广州地区广泛收集引种的乡土植物,以及现有栽培的地毯式屋顶绿化植物种类品种的栽培观察,初步筛选适合广州地区地毯式屋顶绿化的植物共39科65属85个种类品种。利用自行构建的广州地区地毯式屋顶绿化综合评价模型对85个种类品种进... 详细信息

通过对广州地区广泛收集引种的乡土植物,以及现有栽培的地毯式屋顶绿化植物种类品种的栽培观察,初步筛选适合广州地区地毯式屋顶绿化的植物共39科65属85个种类品种。利用自行构建的广州地区地毯式屋顶绿化综合评价模型对85个种类品种进行评价,其中有21个种类品种适合在广州地区地毯式屋顶绿化中大规模推广应用。

关键词：地毯式屋顶绿化植物筛选评价广州

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RETRACTED ARTICLE: AAdvanced treatment of coking wastewater in relation to COD using three-dimensional electrodes

RETRACTED ARTICLE: AAdvanced treatment of coking wastewater ...

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作者： he, xuwen Gong, Jingwen Liu, Liyuan Wang, Hao Zhang, Gong Qin, Qiang School of Chemical and Environmental Engineering China University of Mining and Technology Beijing 100083 China

ISBN: (纸本)9781424450893

Saturated coke as filler materials, experiment on the advanced treatment of coking wastewater by three-dimensional fixed bed electrode reactor was carried out. It was indicated that coke powder can be used as catalytic electrode, an optimized conditions for electrolysis time 60min, current density 8A, particle size 10-20mesh number, dosing quantity 400ml, plate spacing 1cm,COD removal efficiency was up to 70%. Analyzing the code that was used before and after experiments by SEM, we find that coke was appropriate as filled electrode as its compact structure, high crystallinity and proper porosity. The degradation mechanism of COD in the experiment was also carried out and obeyed the first order dynamics. © 2011 IEEE.

关键词： Wastewater treatment

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