CN112174689B - 一种河道淤泥的资源化利用方法 - Google Patents
一种河道淤泥的资源化利用方法 Download PDFInfo
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- CN112174689B CN112174689B CN202011061461.1A CN202011061461A CN112174689B CN 112174689 B CN112174689 B CN 112174689B CN 202011061461 A CN202011061461 A CN 202011061461A CN 112174689 B CN112174689 B CN 112174689B
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Abstract
本发明公开一种河道淤泥的资源化利用方法,包括如下步骤:步骤一,制浆:按照质量份数,将河道淤泥、200目的主料、硅基氯化稻壳粉、助熔剂、粘结剂、触变剂混合均匀,加入球磨罐中,控制温度为常温,2000‑3000r/min球磨60‑120min,用100‑200目的滤网过滤,然后加入100‑200目的造孔剂,混合均匀,得到浆料;步骤二,造粒:将浆料挤到50‑100m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1‑2mm,烘道温度为150‑180℃,保温时间为10‑30min,得到干燥小球;步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1040‑1180℃,保温1‑3h,降温,得到多孔陶瓷颗粒。通过本发明的方法,将淤泥资源化利用,提高了附加值,且得到的多孔陶瓷颗粒兼具开孔率和抗压强度,可以实现连续化工业生产。
Description
技术领域
本发明涉及淤泥处理技术领域,具体涉及一种河道淤泥的资源化利用方法。
背景技术
河道淤泥通常是粘土、泥沙、有机质及各种矿物的混合物,经过长时间物理、化学及生物等作用及水体传输而沉积于河湖水体底部。随着河道淤泥厚度增加,一方面造成河道的船舶通行受到限制,另一方面会影响自然环境,且在河水泛滥的时候会导致河水溢出河道,为此,需要经常清理河道淤泥。
然而,现有的淤泥处理方式是将淤泥从河道中挖出,然后堆放在某个限定的区域,这样一方面会造成空间占用,另一方面,有些淤泥中含有工业污染物,如重金属离子超标等环保问题,直接堆放存在很多问题。
CN202010349920.X公开了一种城市河道淤泥处理方法。本发明提供的城市河道淤泥处理方法是先添加羟丙基甲基纤维素对泥浆进行处理,接着加入磷酸和高锰酸钾,接着再加入羟乙基乙二胺,最后加入自制的固化剂进行处理,即得。经本发明提供的城市河道淤泥处理方法处理后的淤泥具有含水率低,抗压强度高,有机物含量和重金属含量低的优点,同时,该处理方法还可以大大降低淤泥滤液的浊度、吸光度、固体悬浮物含量和粒径,可以有效的改善淤泥滤液的水质,减少环境污染,达到环保的效果。
CN108307979A公开了一种河道淤泥处理方法,包括以下步骤:(1)将清淤装置收集的淤泥输送至过滤室进行过滤;(2)过滤后的淤泥置于模具中,通过第一压力机施压,使淤泥填满模具的四分之三;(3)播种装置将步骤(2)得到的模具表面均匀播撒护坡种子;(4)将经过步骤(3)处理的模具再次覆盖步骤(1)过滤的淤泥,使淤泥填满整个模具为止,并采用第二压力机施压;(5)移动小车将模具移动至河堤上,去除模具,即可得到护坡种子培养基。本发明所提供的一种河道淤泥处理方法操作步骤简单可行,既可节约将淤泥直接搬运过程中的人力物力,又可对河堤进行加固,保护河堤土壤流失,减少后续清淤工作的次数,实现河堤防护的良性循环。
CN201710311534.X公开了一种河道淤泥处理方法,包括以下步骤:1)、获得堆肥用腐熟河道淤泥;2)、将待处理的河道淤泥和堆肥用腐熟河道淤泥、微生物菌剂、载体材料混合均匀,得到混合物;其中,堆肥用腐熟河道淤泥、微生物菌剂、载体材料三者的体积之和与待处理的河道淤泥的体积的比值为(0.06~0.15):1;堆肥用腐熟河道淤泥、微生物菌剂、载体材料三者的体积比为(1~3):(0.05~1):(15~30);3)、将所述混合物堆放于通风的场所,进行好氧发酵,发酵过程中进行翻抛,发酵5天~15天后,得到堆肥后腐熟河道淤泥。本发明实施例提供的方法可以减少河道淤泥堆肥过程中微生物菌剂的用量。
由于淤泥中含有较多的有机质、层状硅酸盐并可能含有一些工业污染物,现有技术一般都是将淤泥进行环保处理,然后进行堆肥发酵等,重新当成泥来用,处理成本高,附加值低,如果可以将淤泥用作附加值较高的产品的原料,那么,将可以大大提高淤泥的价值,真正起到变废为宝的效果。
发明内容
本发明提供一种河道淤泥的资源化利用方法,通过本发明的方法,将淤泥资源化利用,提高了附加值,且得到的多孔陶瓷颗粒兼具开孔率和抗压强度,可以实现连续化工业生产。
一种河道淤泥的资源化利用方法,其特征在于,包括如下步骤:
步骤一,制浆:按照质量份数,将50-60份的河道淤泥、30-40份200目的主料、10-20份的硅基氯化稻壳粉、5-10份的助熔剂、2-6份的粘结剂、5-10份的触变剂混合均匀,加入球磨罐中,控制温度为常温,2000-3000r/min球磨60-120min,然后加入20-40份100-200 目的造孔剂,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到50-100m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1-2mm,烘道温度为150-180℃,保温时间为10-30min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1040-1180℃,保温1-3h,降温,得到多孔陶瓷颗粒。
优选地,步骤一所述的主料为氧化铝粉末、碳化硅粉末、氧化锆粉末中的一种或几种的组合物。
优选地,步骤一所述的助熔剂为氧化钙、氧化锌、氧化镁中一种或几种的组合物。
优选地,步骤一所述的粘结剂为水玻璃、聚乙烯醇、羧甲基纤维素、糊化淀粉、聚丙烯酰胺中一种或几种的组合物。
优选地,步骤一所述的造孔剂为碳酸钙、煤粉、石墨中一种或几种的组合物。
优选地,步骤一所述的触变剂为二氧化硅、有机膨润土、聚酰胺蜡中一种或几种的组合物。
优选地,所述制备得到的多孔陶瓷颗粒可应用于过滤材料和除湿材料领域。
所述的多孔陶瓷颗粒烧结过程中部分反应机理示意如下:
所述氯化稻壳粉,其制备方法如下:
按照质量份数,将40-50份的稻壳粉加入到5-10份的氯化铝,200-320份的质量百分比浓度10-15%的盐酸中,搅拌2-5h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;
其部分反应的方程式示意如下:
所述的一种硅基氯化稻壳粉,使用亚油酸二乙醇酰胺缩合反应,然后与γ-甲基丙烯酰氧基丙基三异丙氧基硅烷进行共聚合,其制备方法如下:
然后与2-5份的亚油酸二乙醇酰胺和100-200份的水混合均匀,通入氮气,控温60-75℃,搅拌3-7h,再加入0.5-1.3份的过硫酸铵,0.02-0.2份的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温70-85℃,搅拌1-3h,过滤,滤液循环使用,固相干燥,烘干后研磨成50-70目的粉末,得到硅基氯化稻壳粉;
其部分反应的方程式示意如下:
进一步的,与γ-甲基丙烯酰氧基丙基三异丙氧基硅烷共聚生成硅基氯化稻壳粉:
与现有技术相比,本发明的有益效果为:
1、将淤泥大量替代多孔陶瓷颗粒中的优质主料,降低多孔陶瓷颗粒的生产成本,且处理了大量的淤泥,不仅解决了环保问题,还创造了附加价值;
2、用河道淤泥替换氧化铝粉末制备多孔陶瓷,硅基氯化稻壳粉的致孔作用明显,硅基氯化稻壳粉,使用亚油酸二乙醇酰胺缩合反应,然后与γ-甲基丙烯酰氧基丙基三异丙氧基硅烷进行共聚合,可以提高多孔陶瓷颗粒抗酸碱的性能,在硅基氯化稻壳粉可以作为骨架的加强筋来提高干燥小球的结合强度,在硅基氯化稻壳粉的协助下,实现用淤泥替代氧化铝粉末来制备多孔陶瓷颗粒。制备得到的多孔陶瓷颗粒在保持较高的开孔率的情况下,兼具较高的抗压强度;
3、将浆料挤到烘道上进行造粒,可以实现连续化工业生产。
附图说明
图1为实施例1所得多孔陶瓷颗粒的傅里叶红外光谱图:
在951cm-1附近存在明显的硅酸根的吸收峰,说明在高温烧结过程中生成了大量的硅酸盐;在1078和784cm-1附近存在明显的硅氧的吸收峰,在464cm-1附近存在明显的硅基氯化稻壳粉的吸收峰,说明陶瓷颗粒中还有硅基氯化稻壳粉;在554cm-1附近存在氧化铁的吸收峰,为河道淤泥中含有的少量氧化铁;在650cm-1附近存在氧化铝的吸收峰,说明陶瓷中存在少量氧化铝;在2900cm-1附近无明显的碳氢吸收峰,说明河道淤泥中的有机物在烧结过程中基本完全分解。
具体实施方式
以下实施例中所用原料均为市售产品,实施例是对本发明的进一步说明,而非限制本发明的范围;
各性能测试方法如下:
1、开孔率:采用开孔率测试仪测试陶瓷的开孔率;
2、抗压强度:采用MTS810陶瓷试验系统进行测试;
3、抗酸强度:按照GB1970-80进行测试;
4、抗碱强度:按照GB1970-80进行测试。
实施例1
步骤一,制浆:将50kg河道淤泥、30kg200目的氧化铝粉末、10kg硅基氯化稻壳粉、5kg氧化锌、2kg水玻璃、5kg气相硅基氯化稻壳粉混合均匀,加入球磨罐中,控制温度为常温,2000r/min球磨120min,然后加入20kg100目的碳酸钙,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到50m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1mm,烘道温度为150℃,保温时间为30min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1040℃,保温1h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将40kg的稻壳粉加入到5kg的氯化铝,200kg的质量百分比浓度10%的盐酸中,搅拌2h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与2kg的亚油酸二乙醇酰胺和100kg的水混合均匀,通入氮气,控温60℃,搅拌3h,再加入0.5kg的过硫酸铵, 0.02kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温70℃,搅拌1h,过滤,滤液循环使用,固相干燥,烘干后研磨成50目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为50%,抗压强度为20Mpa,抗酸强度为90%,抗碱强度为98%。
实施例2
步骤一,制浆:将52.8kg河道淤泥、32.2kg200目的碳化硅粉末、11kg硅基氯化稻壳粉、6.1kg氧化钙、2.8kg聚乙烯醇、6.3kg有机膨润土混合均匀,加入球磨罐中,控制温度为常温,2200r/min球磨105.6min,然后加入23.2kg128目的煤粉,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到63m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1.2mm,烘道温度为157.2℃,保温时间为25.6min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1180℃,保温1.4h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将41kg的稻壳粉加入到6kg的氯化铝,220kg的质量百分比浓度12%的盐酸中,搅拌3h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与3kg的亚油酸二乙醇酰胺和120kg的水混合均匀,通入氮气,控温61℃,搅拌4h,再加入0.6kg的过硫酸铵, 0.04kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温73℃,搅拌1.2h,过滤,滤液循环使用,固相干燥,烘干后研磨成50目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为51%,抗压强度为22Mpa,抗酸强度为91.4%,抗碱强度为98.1%。
实施例3
步骤一,制浆:将54.2kg河道淤泥、34.2kg200目的氧化锆粉末、13.6kg硅基氯化稻壳粉、7.1kg氧化锌、3.9kg羧甲基纤维素、7.5kg聚酰胺蜡混合均匀,加入球磨罐中,控制温度为常温,2500r/min球磨98.4min,然后加入28.8kg150目的石墨,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到73m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1.3mm,烘道温度为162℃,保温时间为20.8min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1050℃,保温1.8h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将44kg的稻壳粉加入到5-10kg的氯化铝,240kg的质量百分比浓度12%的盐酸中,搅拌3h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与3kg的亚油酸二乙醇酰胺和140kg的水混合均匀,通入氮气,控温64℃,搅拌4h,再加入0.8kg的过硫酸铵,0.06kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温76℃,搅拌1.5h,过滤,滤液循环使用,固相干燥,烘干后研磨成55目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为53.8%,抗压强度为24.4Mpa,抗酸强度为92.1%,抗碱强度为98.2%。
实施例4
步骤一,制浆:将56.4kg河道淤泥、36.8kg200目的氧化铝粉末、碳化硅粉末、氧化锆粉末、15kg硅基氯化稻壳粉、8.1kg氧化镁、4.3kg糊化淀粉、8kg气相硅基氯化稻壳粉混合均匀,加入球磨罐中,控制温度为常温,2600r/min球磨90min,然后加入32.4kg162 目的碳酸钙,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到81m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1.5mm,烘道温度为166.2℃,保温时间为15.6min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1130℃,保温2.1h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将47kg的稻壳粉加入到7kg的氯化铝,280kg的质量百分比浓度14%的盐酸中,搅拌4h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与4kg的亚油酸二乙醇酰胺和172kg的水混合均匀,通入氮气,控温68℃,搅拌5h,再加入0.9kg的过硫酸铵, 0.1kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温79℃,搅拌2h,过滤,滤液循环使用,固相干燥,烘干后研磨成50目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为55.6%,抗压强度为27.2Mpa,抗酸强度为93.5%,抗碱强度为98.4%。
实施例5
步骤一,制浆:将57.4kg河道淤泥、38.8kg200目的碳化硅粉末、16.8kg硅基氯化稻壳粉、9.5kg氧化钙、5.3kg聚丙烯酰胺、9kg有机膨润土混合均匀,加入球磨罐中,控制温度为常温,2700r/min球磨80.4min,然后加入35.6kg180目的煤粉,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到93m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1.6mm,烘道温度为169.2℃,保温时间为13.2min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1090℃,保温2.6h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将40-50kg的稻壳粉加入到9kg的氯化铝,300kg的质量百分比浓度14%的盐酸中,搅拌4h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与4kg的亚油酸二乙醇酰胺和180kg的水混合均匀,通入氮气,控温70℃,搅拌6h,再加入1.1kg的过硫酸铵,0.18kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温80℃,搅拌2.5h,过滤,滤液循环使用,固相干燥,烘干后研磨成60目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为57%,抗压强度为28.8Mpa,抗酸强度为94.1%,抗碱强度为98.6%。
实施例6
步骤一,制浆:将60kg河道淤泥、40kg200目的氧化锆粉末、20kg硅基氯化稻壳粉、10kg氧化镁、6kg水玻璃、10kg聚酰胺蜡混合均匀,加入球磨罐中,控制温度为常温, 3000r/min球磨60min,然后加入40kg200目的石墨,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到100m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为2mm,烘道温度为180℃,保温时间为10min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1110℃,保温3h,降温,得到多孔陶瓷颗粒。
所述的硅基氯化稻壳粉,其制备方法如下:
将50kg的稻壳粉加入到10kg的氯化铝,320kg的质量百分比浓度15%的盐酸中,搅拌5h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;然后与5kg的亚油酸二乙醇酰胺和200kg的水混合均匀,通入氮气,控温75℃,搅拌7h,再加入1.3kg的过硫酸铵, 0.2kg的γ-甲基丙烯酰氧基丙基三异丙氧基硅烷,控温85℃,搅拌3h,过滤,滤液循环使用,固相干燥,烘干后研磨成50-70目的粉末,得到硅基氯化稻壳粉。
所得多孔陶瓷颗粒的开孔率为60%,抗压强度为30Mpa,抗酸强度为95%,抗碱强度为99%。
对比例1
相对于实施例1,其他技术特征不变,除了以下变更:
将河道淤泥替换成200目的氧化铝粉末,所得多孔陶瓷颗粒的开孔率为52%,抗压强度为23Mpa,抗酸强度为92%,抗碱强度为98%,可见,用河道淤泥替换氧化铝粉末制备多孔陶瓷,性能相差不大,可以用淤泥替代氧化铝粉末来制备多孔陶瓷颗粒。
对比例2
相对于实施例1,其他技术特征不变,除了以下变更:
将河道淤泥替换成200目的氧化铝粉末,不加入硅基氯化稻壳粉,
所得多孔陶瓷颗粒的开孔率为47%,抗压强度为22Mpa,抗酸强度为88%,抗碱强度为87%,可见,用河道淤泥替换氧化铝粉末制备多孔陶瓷,硅基氯化稻壳粉的致孔作用明显,可以提高抗酸碱的性能,在硅基氯化稻壳粉的协助下,实现用淤泥替代氧化铝粉末来制备多孔陶瓷颗粒。
Claims (6)
1.一种河道淤泥的资源化利用方法,其特征在于,包括如下步骤:
步骤一,制浆:按照质量份数,将50-60份的河道淤泥、30-40份200目的主料、10-20份的硅基氯化稻壳粉、5-10份的助熔剂、2-6份的粘结剂、5-10份的触变剂混合均匀,加入球磨罐中,控制温度为常温,2000-3000r/min球磨60-120min,然后加入20-40份100-200目的造孔剂,混合均匀,得到浆料;
步骤二,造粒:将浆料挤到50-100m长的鼓风烘道上,控制挤到烘道上的颗粒粒径为1-2mm,烘道温度为150-180oC,保温时间为10-30min,得到干燥小球;
步骤三,高温烧结:将干燥小球放入陶瓷烧结炉中,控制温度为1040-1180oC,保温1-3h,降温,得到多孔陶瓷颗粒;
所述硅基氯化稻壳粉,使用亚油酸二乙醇酰胺缩合反应,然后与 γ-甲基丙烯酰氧基丙基三异丙氧基硅烷进行共聚合制备,
所述的硅基氯化稻壳粉,其制备方法如下:
按照质量份数,将40-50份的稻壳粉加入到5-10份的氯化铝,200-320份的质量百分比浓度10-15%的盐酸中,搅拌2-5h,过滤,水洗至PH=7,过滤,烘干,得到氯化稻壳粉;
然后与2-5份的亚油酸二乙醇酰胺和100-200份的水混合均匀,通入氮气,控温60-75℃,搅拌3-7h,再加入0.5-1.3份的过硫酸铵, 0.02-0.2份的 γ-甲基丙烯酰氧基丙基三异丙氧基硅烷, 控温70-85℃,搅拌1-3h,过滤,滤液循环使用,固相干燥,烘干后研磨成50-70目的粉末,得到硅基氯化稻壳粉;
步骤一所述的主料为氧化铝粉末、碳化硅粉末、氧化锆粉末中的一种或几种的组合物。
2.根据权利要求1所述的方法,其特征在于,步骤一所述的助熔剂为氧化钙、氧化锌、氧化镁中一种或几种的组合物。
3.根据权利要求1所述的方法,其特征在于,步骤一所述的粘结剂为水玻璃、聚乙烯醇、羧甲基纤维素、糊化淀粉、聚丙烯酰胺中一种或几种的组合物。
4.根据权利要求1所述的方法,其特征在于,步骤一所述的造孔剂为碳酸钙、煤粉、石墨中一种或几种的组合物。
5.根据权利要求1所述的方法,其特征在于,步骤一所述的触变剂为二氧化硅、有机膨润土、聚酰胺蜡中一种或几种的组合物。
6.根据权利要求1所述的方法,其特征在于,所述制备得到的多孔陶瓷颗粒应用于过滤材料或除湿材料领域。
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