共查询到19条相似文献,搜索用时 62 毫秒
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流态化电极是处理低浓度重金属离子废水的有效方法,本文地非金属导体流态化电极进行研究,并应用于处理含铜废水,可将铜离子浓度降到1ppm以下。 相似文献
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电化学沉积法处理含铜废水 总被引:11,自引:1,他引:11
本文采用电化学沉积法对实验室配制的含Cu^2+水的处理工艺条件进行了研究,探讨了Cu^2+的进口浓度、流量及操作电压对处理结果的影响,并对工厂取样的实际废水进行了测定。实验表明,该法是一种技术可行、经济有效的处理含低浓度重金属离子的方法。 相似文献
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细粒膨胀石墨流态化电极处理含铬废水研究 总被引:9,自引:1,他引:8
采用细粒膨胀石墨作流态化电极,对含铬废水进行处理。实验结果表明:这是一种处理含铬废水行之有效的方法,与传统电解法比较,具有电流效率高,去除 Cr~(6+)速度快,能耗低,不消耗铁阳极和食盐,污泥回收利用方便等优点。处理后废水中 Cr~(6+)浓度达到了国家排放标准。 相似文献
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流化床电极技术及在治理含金属废水中的应用 总被引:6,自引:0,他引:6
介绍了新型的流化床电极(FBE)技术原理,实验设备及流程图,对比了流化床与非流化电解效果,提及流化床电极技术操作和控制条件及治理含金属废水的实例,该法具有一次投资少,操作容量大,耗电少,回收价格便宜,分离回收彻底等优点,在各类电解液的净化方面,特别是在处理低品位矿物的湿法冶金上有着广阔的前景。 相似文献
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离子交换-电沉积联合工艺对电镀废水的处理研究 总被引:1,自引:0,他引:1
采用离子交换-电沉积联合工艺处理含铜电镀废水,考察了各相关因素对处理效果的影响。结果表明,离子交换处理中,pH=4时D402树脂对铜离子去除率最大;流速为6 BV/h时,穿透时间为213.1 min;用质量分数为10%的硫酸作为解吸剂,解吸率可达95.9%。对树脂吸附饱和后解吸的再生液进行电沉积回收铜,在电流密度210 A/m2、温度60℃、pH为0.8、极板间距15 mm的条件下,对450 mL初始Cu2+质量浓度为10 380 mg/L的再生液电解4 h,铜回收率可达94.8%,电流效率62.2%,沉积Cu的质量分数为99.7%。离子交换-电沉积工艺不仅可以保证出水达标排放,而且可以回收铜。 相似文献
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流化床电解法处理含铜废水装置的研制 总被引:5,自引:0,他引:5
提出了采用流化床电解法处理含铜废水,对处理装置的性能进行了研究,确定处理含铜废水的最佳电解参数为电流密度0.5~1.2 A·dm-2,电流效率80%以上,其技术指标为铜回收率99%,电耗5~6 kWh·kg-1.实验表明,该装置处理含铜废水效果良好,并能回收金属铜. 相似文献
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本文阐述了压差法测算流化床床密度的基本原理及其准确性,并介绍了测压差、观察旋风分离器料腿料封高度的方法和装置,对于科研和生产中测取基础数据、监视床内过程进行的情况及保证正常生产操作均具有重要的实际意义。 相似文献
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考虑到能源的综合利用,通过沸腾炉的优点介绍,提出将抛煤机改造成沸腾炉的设想,并对其可行性及经济效益进行分析评估。 相似文献
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从印刷电路板废料中回收铜的研究 总被引:4,自引:0,他引:4
采用双氧水和硫酸作为反应试剂,把铜从电路板废料中剥离出来,利用电解-电渗析法回收废液中的铜。实验结果表明:固:液=1:4时,即10g废料与20mL双氧水,20mL硫酸(1:3)进行反应,铜的剥离率可达98.17%;所得的硫酸铜废液进行电解-电渗析处理的最佳条件为:电流值2.2A、电压值7.5V、电解时间20min,得到铜的回收率为88.07%。得到的铜通过马福炉焙烧(500℃,1h)得氧化铜,用稀硫酸溶解并过滤除去渣滓,再结晶、抽滤、重结晶得硫酸铜,实现了金属资源的再生利用。 相似文献
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多层振动流化床干燥机是化工产品干燥的一种新型设备,是单层流化床干燥机的一种改进形式。这种干燥机在干燥箱结构,孔板结构及调整等方面,比以往干燥设备具有极大改进。本文从振动和风力两个角度出发,着重介绍了这种干燥机的工作原理,物料的运动情况和干燥过程,明确分析了它的特点和应用。 相似文献
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In this project, the selective oxidation of benzene to maleic anhydride (MAN) was studied. Gas phase catalytic oxidation of benzene was carried out in a laboratory scale fluidized bed reactor on six different types of catalysts, which have different compositions. Effects of temperature, flow rates of benzene and air and catalyst type on the reaction selectivity were investigated at atmospheric pressure. The experiments were performed over a temperature range of 325 to 400 °C, a space‐time (W/FA0) range from 11.28 × 105 to 31.9 × 105 g s mol–1, and benzene/air mole ratio changes between 0.0109 and 0.0477. It was seen that conversion of benzene to MAN increased with increasing temperature for the catalysts supported by silica gel, aluminum oxide and titanium oxide. From the results it was found that conversion increased with increasing flow rate of air. When the comparison of the catalysts were made, it could be said that catalysts supported by silica gel showed higher MAN conversions. So it can be concluded that catalysts supported by silica gel were more suitable catalysts for benzene oxidation to MAN in a fluidized bed reactor. 相似文献
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With the view of developing the fluidized bed electrode system, mass transfer coefficient, overpotential distribution, and copper degradation have been observed in this investigation. Particles whose diameters were one of 327, 388, 510, 548, 750, and 960 μm were fluidized by the 1,000 ppm copper sulfate electrolyte. This study used two types of the experimental reactor. One had 5x5.5 cm bed-dimension with various thickness in a rectangular side-by-side configuration; the other 3.2 cm bed-diameter with various height in a cylindrical flow-through configuration. Mass transfer coefficient increased with increasing particle diameter, and the optimum fluidization was obtained at the condition of bed porosity near 0.65. For processing a large fluidized bed reactor, the expansion of bed height at a distance between electrodes was found to be more effective than the enlargement of bed thickness between electrodes. By replacing a three-dimensional current-feeder with a plane feeder, degradation and residual concentration of copper ion in a batch recycling mode could be achieved to be higher than 99% and less than 5 mg/L, respectively. 相似文献