新型无机胶凝炭可再生净水器滤芯材料的研制

发布时间：2018-02-01 14:11

  本文关键词： 无机胶凝剂 活性炭滤芯 水处理　出处：《福州大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文以粉末活性炭为主要原料,采用无机胶凝材料作无机胶凝剂,研制一种新型的无机胶凝炭可再生净水器滤芯材料。通过探讨无机胶凝剂的选择、造粒技术及添加剂等因素对材料性能的影响,得出了制备滤芯材料的最佳配方和工艺条件,并通过探讨养护时间和温度确定了材料的蒸压养护制度。用XRD、BET、SEM、EDS等现代测试分析手段对材料的微观结构进行表征；测试了材料对水质甲醛的吸附特性以及Cd2+的去除效果；并对材料的循环吸附能力进行探索；同时采用外裹工艺对无机胶凝炭净水器滤芯材料的制备工艺进行初步改进。与市面净水器滤芯材料相比,该方法具有成本低廉、工艺简单、吸附性能好、可循环再生等优势。通过大量实验得出,较佳无机胶凝剂为熟料；利用熟料制备试样的较佳方案是：活性炭、熟料和硅微粉质量比例分别为：70wt%、25wt%和5wt%,最佳粒度为16-20目；最佳养护制度：养护温度195℃,养护时间6hrs最佳试样性能：碘吸附值为551.72mg/g,抗压强度为7.25MPa,炭含量为58.48%,气孔率为57.34%,吸水率为69.42%,透水率为1011mL/min,比表面积452.86m2/g,平均孔径2.62nm,总孔容0.30m3/g。从BET的孔径分布曲线可以看出试样是以微孔为主的吸附材料,其微孔孔径分布分别在0.60-1.12nm之间。XRD、SEM、EDS观测结果表明,试样中活性炭的孔结构不受无机胶凝剂的影响,胶凝剂添加量越多试样的抗压强度越大,试样的吸附性能与配方中的活性炭含量成正比。实验表明,试样对甲醛溶液的吸附性能良好,甲醛的饱和吸附量为0.0148mg/g,且对甲醛具有一定的循环再生能力；试样对Cd2+去除效果十分优异,循环吸附20次除镉率平均达83.8%。外裹工艺可进一步提升滤芯质量,最佳外裹胶凝剂量(熟料、硅微粉混合物)为10wt%,与上述最优试样性能相比：试样的抗压强度可提升至8.25MPa,并可减少炭流失。
[Abstract]:In this paper, a new type of filter material for inorganic cementitious carbon renewable water purifier was developed by using inorganic cementitious material as the main raw material and inorganic cementitious material as inorganic gelling agent. The selection of inorganic gelling agent was discussed. The effects of granulation technology and additives on the properties of the material were studied. The optimum formula and technological conditions for preparing filter material were obtained. The curing system of autoclaved material was determined by discussing the curing time and temperature. XRD was used. The microstructure of the material was characterized by modern test and analysis methods such as BET-SEMMA-EDS. The adsorption characteristics of formaldehyde in water and the removal efficiency of Cd2 were tested. The cyclic adsorption capacity of the material was explored. At the same time, the preparation process of filter material for inorganic cementing carbon purifier was improved by using outer wrapping process. Compared with the filter material of market water purifier, this method has the advantages of low cost, simple process and good adsorption performance. The advantages of recycling and regeneration. Through a large number of experiments, it is concluded that the better inorganic gelling agent is clinker; The best way to prepare the sample with clinker is as follows: the mass ratio of activated carbon, clinker and silica fine powder is 1: 70 wt10 / 25wt% and 5wt% respectively, and the optimum particle size is 16-20 mesh; The best curing system: curing temperature 195 鈩，

本文编号：1482047