CN113264772A - 一种生物滴滤塔用导电陶粒填料及其制备方法 - Google Patents
一种生物滴滤塔用导电陶粒填料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种生物滴滤塔用导电陶粒填料，包括如下重量份的组分：40‑50份活性炭粉末，20‑30份铁氧化物粉末，30‑50份粘土。制备方法为：将活性炭粉末、铁氧化物粉末和粘土混合均匀，静置20‑30h后，放入真空炼泥机中进行处置，将处置后的泥料静置18‑24h后，造粒得到直径8‑12mm的泥粒，将泥粒自然风干定型后再烘干，最后进行高温烧制，即得生物滴滤塔用导电陶粒填料。该填料原料价格低廉又环保，生产成本低，制得的填料比表面积高、孔隙率高，并具有优良的导电性和机械强度，解决了现有技术中生物滴滤塔用导电填料存在的比表面积、孔隙率不够，吸附性能不佳的问题。
Description
技术领域
本发明涉及一种生物滴滤塔用导电陶粒填料及其制备方法，属于废气净化技术领域。
背景技术
生物滴滤塔又叫固定膜生物洗涤器，不仅可以用于挥发性有机物(VOCs)的去除，还可以用于非VOCs的去除，比如硫化氢、氨、甲硫醇等恶臭气体，再加上它的投资成本低、净化效率高，因此，越来越受人们的关注。
生物填料作为微生物附着生长、物质传递的载体，在生物滴滤塔中起着至关重要的作用。首先，生物填料需要具备无毒、对微生物的生长没有抑制的特点，其次，比表面积和孔隙率要大，以便于微生物的附着。然后，机械强度和防腐能力也要具备，以便延长其使用寿命。生物填料可分为导电填料和非导电填料，普通的生物填料通常不需具备导电性，但当与其他技术连用时就需考虑到填料的导电性问题。导电性可以加快电子传递，提高降解效率。
本领域常用导电填料为铁碳填料，但是铁碳填料容易生锈，阻碍了后续反应；现有技术中，还有采用由石墨、粘土、水泥和砂等材料组成的材料作为生物滴滤塔用导电填料，虽然这种导电填料具有一定的机械强度以及导电能力，但是比表面积、孔隙率不够，吸附性能有待提高。例如，郭春雨等人提供了一种导电填料的制备方法，该导电填料是由石墨粉、硅藻土、粘土、硅酸盐水泥、金属氧化物以及细砂制成的直径3-4cm的圆球，该单个导电填料的电阻约为175Ω，比表面积约为16.31m2/g，孔体积约为0.1007mL/g，平均孔直径约为24.70nm，比表面积、孔隙率不够，吸附性能不佳。
发明内容
本发明的目的在于解决现有技术中生物滴滤塔用导电填料存在的比表面积、孔隙率不够，吸附性能不佳的问题，提供一种生物滴滤塔用导电陶粒填料，其比表面积高、孔隙率高，具有优良的导电性和机械强度，并且原料易得、成本低。
本发明的另一目的在于提供上述生物滴滤塔用导电填料的制备方法。
技术方案
一种生物滴滤塔用导电陶粒填料，包括如下重量份的组分：40-50份活性炭粉末，20-30份铁氧化物粉末，30-50份粘土。
进一步，所述活性炭粉末的粒径为20-40μm。
进一步，所述铁氧化物粉末的粒径为30-80μm，所述铁氧化物选自氧化亚铁、三氧化二铁和四氧化三铁中的一种或者两种以上任意比例的组合。
进一步，所述粘土为陶土或高岭土中的一种或者二者任意比例的混合物。
上述生物滴滤塔用导电陶粒填料的制备方法，包括如下步骤：
(1)将活性炭粉末、铁氧化物粉末和粘土混合均匀，得到泥料；
(2)将泥料静置20-30h后，放入真空炼泥机中进行处置，得到处置后的泥料；
(3)将处置后的泥料静置18-24h后，放入造粒机中造粒，得到直径8-12mm的泥粒；
(4)将泥粒自然风干定型后，再放入烘干机干燥，得到干燥的泥粒，最后将干燥的泥粒进行高温烧制，结束后，得到生物滴滤塔用导电陶粒填料。
进一步，步骤(2)中，泥料在真空练泥机内的处理参数为：转速30r/min,真空度保持720mmHg及以上，运行时间10-14h。
进一步，步骤(4)中，所述干燥温度为130℃，时间为3-5h。
进一步，步骤(4)中，所述高温烧制的温度为750℃，时间为2h。
本发明的有益效果：本发明以活性炭粉末、铁氧化物粉末和粘土为原料，制备了一种生物滴滤塔用导电陶粒填料，该填料原料价格低廉又环保，生产成本低，制得的填料比表面积高、孔隙率高，并具有优良的导电性和机械强度。
具体实施方式
下面结合具体实施例对本发明的技术方案作进一步说明。
实施例1
一种生物滴滤塔用导电陶粒填料，包括如下重量份的组分：40份粒径为20-40μm的活性炭粉末，20份粒径为30-80μm的铁氧化物粉末(重量比为1:1的氧化亚铁和三氧化二铁粉末)，40份高岭土。
生物滴滤塔用导电陶粒填料的制备方法，包括如下步骤：
(1)将活性炭粉末、铁氧化物粉末和粘土混合均匀，得到泥料；
(2)将泥料静置24h后，放入真空炼泥机中进行处置(转速30r/min,真空度保持720mmHg及以上，运行时间12h)，得到处置后的泥料；
(3)将处置后的泥料静置18h后，放入造粒机中造粒，得到直径8mm的泥粒；
(4)将泥粒自然风干2h定型后，再放入烘干机干燥(130℃，3h)，得到干燥的泥粒，最后将干燥的泥粒在750℃下烧制2h，结束后，得到生物滴滤塔用导电陶粒填料。
本实施例中，每吨原料成本为1100元，制得的生物滴滤塔用导电陶粒填料的成本为0.01元/个。
本实施例制备的生物滴滤塔导电陶粒填料，比表面积为30m2/g，孔隙率为85％，单个导电陶粒填料电阻为7Ω，机械强度为70N，微生物吸附率37％。
实施例2
一种生物滴滤塔用导电陶粒填料，包括如下重量份的组分：50份粒径为20-40μm的活性炭粉末，20份粒径为30-80μm的铁氧化物粉末(三氧化二铁粉末)，30份陶土。
生物滴滤塔用导电陶粒填料的制备方法，包括如下步骤：
(1)将活性炭粉末、铁氧化物粉末和粘土混合均匀，得到泥料；
(2)将泥料静置24h后，放入真空炼泥机中进行处置(转速30r/min,真空度保持720mmHg及以上，运行时间12h)，得到处置后的泥料；
(3)将处置后的泥料静置22h后，放入造粒机中造粒，得到直径12mm的泥粒；
(4)将泥粒自然风干2h定型后，再放入烘干机干燥(130℃，3.5h)，得到干燥的泥粒，最后将干燥的泥粒在750℃下烧制2h，结束后，得到生物滴滤塔用导电陶粒填料。
本实施例中，每吨原料成本为1300元，制得的生物滴滤塔用导电陶粒填料的成本为0.02元/个。
本实施例制备的生物滴滤塔导电陶粒填料，比表面积为40m2/g，孔隙率为89％，单个导电陶粒填料电阻为5Ω，机械强度为55N，微生物吸附率32％。
实施例3
一种生物滴滤塔用导电陶粒填料，包括如下重量份的组分：40份粒径为20-40μm的活性炭粉末，25份粒径为30-80μm的铁氧化物粉末(重量比为1:2:1的氧化亚铁、三氧化二铁和四氧化三铁粉末)，35份陶土。
生物滴滤塔用导电陶粒填料的制备方法，包括如下步骤：
(1)将活性炭粉末、铁氧化物粉末和粘土混合均匀，得到泥料；
(2)将泥料静置24h后，放入真空炼泥机中进行处置(转速30r/min,真空度保持720mmHg及以上，运行时间12h)，得到处置后的泥料；
(3)将处置后的泥料静置18h后，放入造粒机中造粒，得到直径10mm的泥粒；
(4)将泥粒自然风干2h定型后，再放入烘干机干燥(130℃，4h)，得到干燥的泥粒，最后将干燥的泥粒在750℃下烧制2h，结束后，得到生物滴滤塔用导电陶粒填料。
本实施例中，每吨原料成本为1200元，制得的生物滴滤塔用导电陶粒填料的成本为0.01元/个。
本实施例制备的生物滴滤塔导电陶粒填料，比表面积为45m2/g，孔隙率为90％，单个导电陶粒填料电阻为8Ω，机械强度为65N，微生物吸附率40％。
对比例
郭春雨题为《导电填料生物滴滤池的构建及其处理甲苯废气性能的研究》的硕士论文中提供了一种导电填料的制备方法，该导电填料是由石墨粉、硅藻土、粘土、硅酸盐水泥、金属氧化物以及细砂制成的直径3-4cm的圆球。该单个导电填料的电阻约为175Ω，比表面积约为16.31m2/g，孔体积约为0.1007mL/g，平均孔直径约为24.70nm。
Claims (8)
1.一种生物滴滤塔用导电陶粒填料，其特征在于，包括如下重量份的组分：40-50份活性炭粉末，20-30份铁氧化物粉末，30-50份粘土。
2.如权利要求1所述生物滴滤塔用导电陶粒填料，其特征在于，所述活性炭粉末的粒径为20-40μm。
3.如权利要求1所述生物滴滤塔用导电陶粒填料，其特征在于，所述铁氧化物粉末的粒径为30-80μm，所述铁氧化物选自氧化亚铁、三氧化二铁和四氧化三铁中的一种或者两种以上任意比例的组合。
4.如权利要求1或2或3所述生物滴滤塔用导电陶粒填料，其特征在于，所述粘土为陶土或高岭土中的一种或者二者任意比例的混合物。
5.权利要求1或2或3或4所述生物滴滤塔用导电陶粒填料的制备方法，其特征在于，包括如下步骤：
(1)将活性炭粉末、铁氧化物粉末和粘土混合均匀，得到泥料；
(2)将泥料静置20-30h后，放入真空炼泥机中进行处置，得到处置后的泥料；
(3)将处置后的泥料静置18-24h后，放入造粒机中造粒，得到直径8-12mm的泥粒；
(4)将泥粒自然风干定型后，再放入烘干机干燥，得到干燥的泥粒，最后将干燥的泥粒进行高温烧制，结束后，得到生物滴滤塔用导电陶粒填料。
6.如权利要求5所述生物滴滤塔用导电陶粒填料的制备方法，其特征在于，步骤(2)中，泥料在真空练泥机内的处理参数为：转速30r/min,真空度保持720mmHg及以上，运行时间10-14h。
7.如权利要求5所述生物滴滤塔用导电陶粒填料的制备方法，其特征在于，步骤(4)中，所述干燥温度为130℃，时间为3-5h。
8.如权利要求5或6或7所述生物滴滤塔用导电陶粒填料的制备方法，其特征在于，步骤(4)中，所述高温烧制的温度为750℃，时间为2h。
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