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本文就目前电除尘器直流高电压测量系统的误差进行了讨论,并为改进直流高电压的测量方法和提高测量精度,提出了一种测量方法。 相似文献
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《矿山资源开发利用与环境保护》2002,(3):5-7
可逆变色涂料,是用.热致变色材料制成的一种功能材料。当涂层表面达到一定温度后,涂料颜色改变,当温度降低后又恢复原有的颜色。这种涂料主要用于一般测温仪器无法测量和设备高速运转难以测量温度的场合,例如,炼油装置的超温报警,通信电缆封接,飞机的发动机涡轮叶片,火焰筒、返回式卫星表面与大气摩擦产生的温度;此外,在食品、卫生、医疗方面,如食品保鲜冷藏温度的指示,医疗设备消毒灭菌;在非测温领域,如测试干电池电压,热色防伪标签,变色陶瓷、变色服装方面及娱乐场所、酒店、宾馆、餐厅、会议厅及家居内外墙壁装饰等,用以满足人们对工业和生活的需求。 相似文献
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从供需关系的视角发出,利用蛛网模型分析再生资源价格波动的形成机理.再生资源的价格波动在一定程度上可以用供需的内部传导来解释,影响供求关系的因素主要有3个:再生资源的异质替代效应、生产成本的变动以及市场体系的不完备.厘清再生资源价格波动的形成机理,对于完善再生资源的价格机制有着重要意义. 相似文献
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针对电容吸附除盐法的缺点,通过对电极进行绝缘处理,开发了一种新型高电压电容吸附除盐技术。实验结果表明:增大外加电压,有利于除盐效率的提高;外加电压为60V时,NaCl去除率可达90%以上;增大废水流速对吸附效果不利;反应温度对处理效果的影响不大;在NaCl质量浓度为80mg/L、外加电压为60V、反应温度为25℃、废水流速为36m/s、反应时间为30min的条件下,经一级处理和二级处理后出水的NaCl质量浓度分别为39mg/L和16mg/L,NaCl去除率分别为51.3%和80.0%。 相似文献
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介绍了有源电力滤波器控制策略,提出了PWM控制技术在电网电压畸变情况下对电网中滤波电流进行连续动态补偿。建立了PWM控制的逆变系统模型并进行仿真研究,结果验证了该控制策略能有效补偿谐波电流。 相似文献
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对某铁合金厂2台硅铁矿热炉烟气参数进行了现场测量,测量结果表明,测点烟气温度偏低,流量偏大.通过对原始测量数据进行筛选整理,得到了更加真实的测量结果;通过分析测量数据,诊断出导致现有余热锅炉进口烟气温度偏低的主要原因,并给出相应的对策建议. 相似文献
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New methods for measurement of odorous gases, especially for aerosol-bound chemical compounds, have been developed in the Department of Measurement Technology (Technical University of Hamburg Harburg--MT-TUHH). Odorous compounds in the waste gases produced by the food industry were analysed based on high-volume aerosol sampling techniques, enrichment on solid phase micro extraction (SPE) cartridges and analytical measurement techniques using thermal desorption gas chromatography-mass spectrometry. The analysis results were compared to classic analytical procedures using adsorbence materials (Tenax) for enrichment. In comparison to aerosol sampling, analysis of Tenax samples was found to be ineffective, especially for analyzing polar semi volatile compounds. In addition, sensor arrays were also used in the study to characterize odors of different waste gases emitted by food production facilities. Measuring the odor units of the waste gas of a fat producing factory, the results of sensor-array-measurements show good correlation with results obtained with olfactometric measurements. 相似文献
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超声波协同电化学氧化降解苯胺的研究 总被引:15,自引:0,他引:15
采用超声波协同电化学氧化法处理苯胺溶液,考察了超声时间、苯胺浓度、溶液pH、电解电压、电解质浓度等因素对苯胺降解率的影响。试验结果表明:在超声波与电化学联合作用下,苯胺降解率随降解时间的延长而提高,苯胺浓度无论是低还是高,声电联合作用完全去除苯胺只需30min左右,电化学单独作用完全去除苯胺约需要120min;苯胺初始浓度较低时,其降解率较高;随着pH的增大,苯胺降解率先降低后提高,pH为10左右苯胺降解率最高;电解质Na2SO4的浓度对苯胺降解率影响不大;电解电压在4~12V范围内,苯胺降解率随电压升高而提高,电压为16V时,其降解率下降。 相似文献
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以4,4′-二溴联苯醚(BDE-15)为研究对象,探讨了电极电压、初始土壤pH、β-环糊精加入量、NaCl加入量等工艺条件对多溴联苯醚在土壤中迁移效果的影响。实验结果表明:在电极电压为5~15V范围内,随着电极电压的升高,土壤中BDE-15的迁移效果增强;初始土壤为酸性时、加入β-环糊精或NaCl后,土壤中BDE-15的迁移效果均增强。本实验选择的最佳工作条件为:电极电压15V,初始土壤pH3,β-环糊精的加入量3g,NaCl加入量5g。 相似文献
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影响实验室水样COD测定准确性的因素主要有标准溶液浓度、试剂添加顺序、取样量的多少、水样中的氯离子含量、水样中的悬浮物含量、水样中的油含量及水样中的水生生物含量等。针对悬浮物或石油类含量较高的水样,给出了分析测试过程中的注意事项,为实验室分析人员提供技术参考。 相似文献
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Electrocoagulation of some reactive dyes: a statistical investigation of some electrochemical variables 总被引:8,自引:0,他引:8
In this study, the decolorization of strong colored solutions containing the reactive textile dyes by electrocoagulation was investigated. The experiments were statistically designed and carried out according to a 2(4) full factorial design with two replicate and four center points. This design was extended with eight additional axial points. Then, the non-linear regression was applied on the data by using MINITAB software. The variables chosen for this work are mixing rate, cell voltage, electrolysis time and current density. Results showed that the effective variables on decolorization process are cell voltage, electrolysis time and current density. In addition, to determine the effect of dye and electrode type on decolorization, the additional experiments were carried out. It was determined the dye and electrode type are important on the decolorization process. 相似文献