蒸压法制备污泥基发泡保温材料的研究
发布时间：2018-08-04 21:43
【摘要】：随着城市和工业废水污染治理力度的加大,市政工业污泥产生量急速增加。污泥成分复杂,处理困难,对环境危害大,污泥资源化处理技术已成为研究热点。作为实现污泥减量化、无害化、资源化的污泥建材利用,具有广阔的发展应用前景。本文依托国家科技重大专项-水专项(2010ZX07319-002)和江苏省2014年环保科研计划(2014028),针对国内外污泥处理处置技术发展和应用现状,研究提出蒸压法制备污泥基发泡保温材料技术。根据发泡倍数大、泡沫半衰期长和稳泡剂互不干扰的评价指标,优选出复配比为0.6%的OP和0.3%的纤维素醚发泡溶液。搭建制备发泡保温板实验台及模具,通过正交实验,建立密度、抗压强度和导热系数的综合评价指标,得到最优原料配比为污泥12.5%、水泥55.5%、粉煤灰24%、工程砂8%和水固比0.55。设计制作蒸压釜,通过正交实验,提出抗压强度、导热系数和吸水率的综合评价指标,得出3d静停时间,150℃蒸压温度和3h保温时间为最佳蒸压养护条件,制备的污泥基发泡保温材料密度、抗压强度、导热系数和吸水率分别为626.4kg/m3、0.572MPa、0.0407W/m·K和15.9%,分别达到无机发泡保温板国家行业标准JG/T266-2011中A06、C0.5、A03和W15的相应指标要求。蒸压养护过程对污泥发泡保温板的抗压强度和保温性能的提升以及缩短水化成型时间的作用显著。本文探究了成型及蒸压条件对重金属固化作用的影响,发现经蒸压养护的水泥-粉煤灰-工程砂体系对污泥中重金属具有良好的固化作用,对含重金属污泥的资源化利用具有一定的参考价值。
[Abstract]:With the increase of municipal and industrial wastewater pollution treatment, municipal industrial sludge production increased rapidly. The sludge composition is complex, the treatment is difficult, the harm to the environment is great, the sludge resource treatment technology has become the research hot spot. As a sludge reducing, harmless, and resource utilization of sludge building materials, it has a broad prospect of development and application. In this paper, based on the National Science and Technology Project (2010ZX07319-002) and the 2014 Jiangsu Provincial Environmental Protection Research Program (2014028), and in view of the development and application of sludge treatment and disposal technology at home and abroad, the technology of producing sludge based foaming insulation material by autoclaving method is proposed. According to the evaluation indexes of high foaming ratio, long foam half-life and non-interference of foaming stabilizer, op and 0.3% cellulose ether foaming solution with the ratio of 0.6% and 0.3% were selected. The synthetic evaluation indexes of density, compressive strength and thermal conductivity were established by orthogonal test. The optimum raw material ratio was sludge 12.5, cement 55.5, fly ash 24, engineering sand 8% and water / solid ratio 0.55. The autoclave was designed and made. Through orthogonal experiment, the comprehensive evaluation indexes of compressive strength, thermal conductivity and water absorption rate were put forward, and the optimum conditions of autoclaving curing were obtained as follows: 3d static stop time, 150 鈩，
本文编号：2165254
[Abstract]:With the increase of municipal and industrial wastewater pollution treatment, municipal industrial sludge production increased rapidly. The sludge composition is complex, the treatment is difficult, the harm to the environment is great, the sludge resource treatment technology has become the research hot spot. As a sludge reducing, harmless, and resource utilization of sludge building materials, it has a broad prospect of development and application. In this paper, based on the National Science and Technology Project (2010ZX07319-002) and the 2014 Jiangsu Provincial Environmental Protection Research Program (2014028), and in view of the development and application of sludge treatment and disposal technology at home and abroad, the technology of producing sludge based foaming insulation material by autoclaving method is proposed. According to the evaluation indexes of high foaming ratio, long foam half-life and non-interference of foaming stabilizer, op and 0.3% cellulose ether foaming solution with the ratio of 0.6% and 0.3% were selected. The synthetic evaluation indexes of density, compressive strength and thermal conductivity were established by orthogonal test. The optimum raw material ratio was sludge 12.5, cement 55.5, fly ash 24, engineering sand 8% and water / solid ratio 0.55. The autoclave was designed and made. Through orthogonal experiment, the comprehensive evaluation indexes of compressive strength, thermal conductivity and water absorption rate were put forward, and the optimum conditions of autoclaving curing were obtained as follows: 3d static stop time, 150 鈩，
本文编号：2165254
本文链接：https://www.wllwen.com/kejilunwen/huanjinggongchenglunwen/2165254.html
最近更新
教材专著
