共查询到19条相似文献,搜索用时 109 毫秒
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采用阳极氧化法制备转盘式TiO_2阳极,设计并开发了转盘式光催化燃料电池(PFC),探讨了圆盘转速对PFC中染料降解效果的影响。实验结果表明:随着圆盘转速的提高,污染物和光电界面反应产物的传质作用得以强化,罗丹明B降解率提高;在圆盘转速为1 600 r/min、反应时间为60 min的条件下,罗丹明B降解率达90.8%,是圆盘转速为0 r/min时的8.5倍;光电流也随着圆盘转速的提高而提高,但提高幅度远小于罗丹明B降解率的提高幅度;同时,加强传质作用后再外加电压对PFC催化降解性能的提高作用有限。 相似文献
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进行了高浓度悬浮液的混凝实验研究。为研究混合阶段渐变剪切速率对混凝沉降效果的影响,在混合阶段分别采用固定搅拌转速和渐变搅拌转速进行实验。在混合阶段采用固定搅拌转速,当搅拌转速为210r/min时,絮体二维分形维数最高为1.8847,悬浮液浊度最低为118NTU。采用渐变搅拌转速的方法,由210r/min开始逐渐降低搅拌转速,絮体二维分形维数最大,为1.9205,处理后悬浮液浊度最小,为107NTU。在一般混凝沉降过程的规律及模型的基础上,提出了高浓度悬浮液混凝沉降过程的物理模型。 相似文献
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灰色摆动序列的GM(1,1)拟合建模法及其应用 总被引:5,自引:0,他引:5
建立了灰色摆动序列GM(1,1)动态指数变换拟合建模方法,对某地工业固体废物产生量的预测结果表明,该法合理有效,切实可行,并有良好的精度。 相似文献
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《电力环境保护》2000,(2)
案例研究目的通过对实际项目的研究 ,着重从理论和应用、市场潜力及经济效益等方面分析采用变频调速装置控制风机、水泵的可行性和必要性。案例分析概述丽都动力中心成立于 1986年 ,在满足给丽都酒店供能的同时 ,还为附近其他几家单位供能。该中心的锅炉系统有 3台 2 0t/h蒸汽锅炉 ,其辅机系统包括 :3台 75kW引风机、3台 55kW鼓风机、1台 2 2 .5kW给水泵、1台 7.5kW冷凝水泵及 1台 2 2kW冲渣泵等共 9台 ,总功率为 4 4 2kW。由于季节、气候等因素的影响 ,要求锅炉系统提供变化的蒸汽量 ,因此其辅机系统也要提供与之匹配、变化… 相似文献
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以锌粉为还原剂进行了聚氯乙烯(PVC)的机械化学还原脱氯(简称脱氯)探索研究,考察了球磨转速、球料比(磨球与试样的质量比)、锌粉与PVC质量比等对脱氯率的影响,并对脱氯产物进行了X射线衍射、红外光谱等分析。实验结果表明,最佳工艺条件为球料比33、球磨转速528r/min、锌粉与PVC质量比9;产物中未形成结晶性氯化锌,且锌粉被氧化成ZnO;行星球磨比搅拌球磨对PVC的脱氯效果好,球磨时间超过3h,PVC的脱氯率可接近100%。 相似文献
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采用旋流萃取分离技术处理某炼油厂常减压装置电脱盐废水(初始废水含油量约为5 000 mg/L),优化了废水除油的工艺条件。试验结果表明,废水除油的最佳工艺条件为:旋流萃取分离机中心转子的转速960 r/min、废水流量2 000 L/h、废水温度80℃。废水经旋流萃取分离后,废水的含油量小于200 mg/L,废水除油效果较好;分离后油相的含水量约为0.1%(w),盐质量浓度小于20 mg/L,可回注到常减压装置原料罐循环利用。对于2 Mt/a的常减压装置,采用旋流萃取分离技术后,每年可减少支出100.4万元。 相似文献
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以旋转填充床(RPB)为反应器,采用臭氧氧化工艺处理实际兰炭废水一级生化池出水。考察了臭氧浓度、RPB转速、气液比、初始废水pH、废水温度和RPB处理级数对废水处理效果和臭氧利用率的影响。实验得到的适宜工艺条件为:保持进气流量90 L/h不变,不调节废水pH和温度,控制臭氧质量浓度50 mg/L、气液比5∶1、RPB转速1 500 r/min,进行二级处理。在上述工艺条件下,处理COD为340.0 mg/L、BOD5/COD为0.18、pH为7.77、温度为24.7 ℃的废水,处理后出水COD去除率为19.7%,BOD5/COD为0.34,可生化性大幅提高,可满足后续生化处理要求。 相似文献
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空气涡轮制冷低温粉碎法回收废弃橡胶 总被引:1,自引:0,他引:1
利用带回冷循环的空气涡轮制冷系统,在低温条件下,将废旧橡胶进行冷冻、粉碎、制成60目以上的精细胶粉。此法的冷冻能耗成本仅为国际上通用的液氮法的1/10,整具工艺过程不产生二次污染,为废旧橡胶的综合利用提供了一条新途径。 相似文献
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Improvement in the feeding method to an inclined conveyor designed for the recycling of foundry sand
H. Ohya S. Endoh T. Honma Y. Hamano 《Journal of Material Cycles and Waste Management》2003,5(1):0049-0054
The goal of the inclined conveyor method for particle shape separation is to process a large amount of feed material for
recycling technology. The high feed rate has been achieved because the movement of particles is faster than for other previously
introduced equipment. The separation performance of the apparatus was tested with foundry sand. A large amount of sand was
treated, and various processing capacities were studied experimentally. The feed method was improved from point to line with
wide troughs to process the higher feed rate. We succeeded in attaining a feed rate of 1.49 × 10−3 kg/s with a 0.3-m trough. The space filling, which was an important factor in deciding the capacity of the feed rate, was
defined. This method is useful for any kind of line-feed method.
Received: March 25, 2002 / Accepted: August 5, 2002 相似文献
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徐州电厂超超临界1000MW机组投产后及时采用了给水加氧处理技术,介绍了1号机组给水加氧转换过程、水汽指标的变化情况。加氧处理技术实施后水汽系统含铁量显著降低,精处理混床运行周期延长,加药量减少,效果显著,提高了机组运行的经济性和安全性。 相似文献
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In areas of the country where the U.S. Department of Energy has classified the available wind resources as Class 3 or greater, the use of wind turbines to provide power to relatively small remediation systems such as groundwater circulation wells may be technically and economically feasible. Groundwater circulation wells are a good candidate technology to couple with renewable energy, because the remediation system removes contamination from the subject aquifer with no net loss of the groundwater resource, while the wind turbine does not create potentially harmful air emissions. Wind data collected in the vicinity of the former Nebraska Ordnance Plant Superfund site were used to select a wind turbine system to provide a portion of the energy necessary to power a groundwater circulation well located in an area of high trichloroethylene groundwater contamination. Because utility power was already installed at the remediation system, a 10 kW grid inter‐tie wind turbine system supplements the utility system without requiring batteries for energy storage. The historical data from the site indicate that the quantity of energy purchased correlates poorly with the quantity of groundwater treated. Preliminary data from the wind turbine system indicate that the wind turbine provides more energy than the remediation system treatment components and the well submersible pump require on a monthly average. The preliminary results indicate that the coupling of wind turbines and groundwater circulation wells may be an attractive alternative in terms of the system operation time, cost savings, and contaminant mass removal. © 2004 Wiley Periodicals, Inc. 相似文献
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An investigation was conducted regarding the potential economic benefits associated with using a wind turbine to power a groundwater circulation well (GCW) at the former Nebraska Ordnance Plant Superfund site. The first phase of the investigation used a 10‐kilowatt‐rated grid inter‐tie wind turbine to partially offset the purchase of electricity from the utility company. The second phase consisted of the conversion of the grid inter‐tie system to an off‐grid system that stored energy using batteries. During the second phase, the GCW system was operated using either wind turbine power or utility power, and the other system components were operated using utility power. The study showed that a significant amount of power purchased from the utility company was used for nonessential purposes (other than operating the GCW pump and essential treatment components). One nonessential power consumer was the continuous heating of the equipment shelter for operator comfort during their 10‐minute visit every few days. Wind‐turbine reduction in utility power consumption was evaluated, and the operating time of a hypothetical system powered solely by the wind turbine was compared to the actual GCW operating time. This study indicates that retrofitting this GCW system did not economically offset power costs from a cheap, readily available grid system. Perhaps at a remote location with a more energy‐efficient design and operation and the inclusion of green power benefits (in some monetary amount), the wind turbine results will be more favorable. The study of a renewable energy application at the site highlighted opportunities for significant electrical energy savings regardless of the source of the electricity. © 2008 Wiley Periodicals, Inc. 相似文献