活性炭纤维电热再生新方法

为了降低活性炭纤维(ACF)的使用成本,促进其推广应用,提出了一种新的再生方法。以甲醛为吸附质,采用动态吸附法和电热脱附,研究了ACF的吸附及电热再生性能,着重分析了电热再生的影响因素。实验结果表明:ACF对甲醛的饱和吸附量达299.5 mg/g;脱附时间为5 min,再生效率达91.3%;且ACF损耗很小。本方法再生时间短,效率高,吸附剂损失少,操作简便,是一种较为理想的再生方法。

柱状活性炭电热再生技术的试验研究

以北京某水厂常年吸附饱和的活性炭为研究对象,对静止和流动两种状态下饱和活性炭的电阻率随温度的变化进行对比,同时探究活性炭电热再生炉的再生机理,考察不同温度条件下的再生效果。结果表明,在流动状态下,饱和活性炭的电阻率随温度升高而降低的效果更好。实验所用电热再生炉就是利用这一性质实现活性炭的高温再生。再生取样结果表明,850℃的再生效果最好,其再生炭的碘吸附值和亚甲蓝吸附值分别达到新炭的91.1%和92.7%。

电热再生法脱附高沸点有机溶剂的研究

运用电热再生法研究吸附了不同沸点、不同分子量的挥发性有机溶剂(VOCs)异辛烷、甲苯、N,N-二甲基甲酰胺、甲基丙烯酸正丁酯的活性炭纤维的再生效果,考察了再生温度对活性炭纤维再生效率的影响.结果表明:再生温度低于VOCs沸点时,VOCs在活性炭纤维中难被脱附;相同再生条件下,长链状分子结构VOCs气体比较难从活性炭纤维中脱附出来;当再生温度高于200℃时,活性炭纤维吸附性能随再生次数增多而明显下降.

活性碳纤维电热再生研究

用自制电热再生装置对吸附甲苯的活性碳纤维进行电热再生试验,通过二次通用旋转组合设计试验方案,以甲苯脱附率和脱附质量两个指标考察了脱附温度、载气流量和碳纤维层厚度对活性碳纤维电热再生效果的影响,得出了局部最佳组合方案:当脱附温度为170℃、载气流量为1 200 mL/min、碳纤维层厚度为16 mm时,甲苯脱附率平均值为92.37%,脱附质量平均值为6.058 g,活性碳纤维的电热再生效果最好。

活性炭电热原位再生技术研究

活性炭电热再生能耗利用率高,而且可以实现原位再生,避免炭转移质量损失。以饱和吸附苯酚的活性炭为研究对象,电热再生饱和活性炭,考察在不同温度、活化时间等条件下的再生效果。结果表明,800℃炭化5min后通入水蒸气活化30min,活性炭基本恢复其吸附性能,碘吸附值、苯酚吸附值、亚甲基蓝吸附值的恢复率分别为95.9%、99.2%、97.6%,再生质量损失率为4.52%。活性炭吸附饱和循环再生4次,吸附性能下降,碘吸附值、苯酚吸附值、亚甲基蓝吸附值恢复率分别为77.8%、81.1%、86.1%,而再生质量损失率增加,为26.9%。活性炭电热再生在进行小规模活性炭再生方面具有良好的应用前景。

Building Sector： The Different Ways to Improve Their Energetic Efficiency

The building sector has a significant weight in the global energy consumption in almost of the countries. So, there is a high potential for increasing its energy efficiency. With the enforcement of the energetic certification, it was tried to select different solutions that presents less energy consumption and waste, as well as an effective reduction of CO2 emissions. This work fits in this perspective, since the main goal is to evaluate the contribution of passive and active solutions that can be used in buildings for the improvement of its energetic efficiency, as well as to evaluate the contribution of renewable energy sources. Contribution of solar systems for hot water heating and electric energy production has been studied, as well as cogeneration, Combined Heat and Power （CHP）. The case studied is a hotel. To improve the building performance, there were proposed several changes, with the goal of evaluating the contribution of the different solutions proposed. It was concluded that they contribute to a reduction of thermal needs of 25.2% and avoided emissions of CO2 is 30.4%. The analysis of the implementation of trigeneration, Combined Heat, Cooling and Power （CHCP） turns it executable. The payback period is less than 8 years.