發(fā)布時間：2018-08-04 21:43

【摘要】：隨著城市和工業(yè)廢水污染治理力度的加大,市政工業(yè)污泥產生量急速增加。污泥成分復雜,處理困難,對環(huán)境危害大,污泥資源化處理技術已成為研究熱點。作為實現(xiàn)污泥減量化、無害化、資源化的污泥建材利用,具有廣闊的發(fā)展應用前景。本文依托國家科技重大專項-水專項(2010ZX07319-002)和江蘇省2014年環(huán)�？蒲杏媱�(2014028),針對國內外污泥處理處置技術發(fā)展和應用現(xiàn)狀,研究提出蒸壓法制備污泥基發(fā)泡保溫材料技術。根據發(fā)泡倍數(shù)大、泡沫半衰期長和穩(wěn)泡劑互不干擾的評價指標,優(yōu)選出復配比為0.6%的OP和0.3%的纖維素醚發(fā)泡溶液。搭建制備發(fā)泡保溫板實驗臺及模具,通過正交實驗,建立密度、抗壓強度和導熱系數(shù)的綜合評價指標,得到最優(yōu)原料配比為污泥12.5%、水泥55.5%、粉煤灰24%、工程砂8%和水固比0.55。設計制作蒸壓釜,通過正交實驗,提出抗壓強度、導熱系數(shù)和吸水率的綜合評價指標,得出3d靜停時間,150℃蒸壓溫度和3h保溫時間為最佳蒸壓養(yǎng)護條件,制備的污泥基發(fā)泡保溫材料密度、抗壓強度、導熱系數(shù)和吸水率分別為626.4kg/m3、0.572MPa、0.0407W/m·K和15.9%,分別達到無機發(fā)泡保溫板國家行業(yè)標準JG/T266-2011中A06、C0.5、A03和W15的相應指標要求。蒸壓養(yǎng)護過程對污泥發(fā)泡保溫板的抗壓強度和保溫性能的提升以及縮短水化成型時間的作用顯著。本文探究了成型及蒸壓條件對重金屬固化作用的影響,發(fā)現(xiàn)經蒸壓養(yǎng)護的水泥-粉煤灰-工程砂體系對污泥中重金屬具有良好的固化作用,對含重金屬污泥的資源化利用具有一定的參考價值。
[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，

本文編號：2165254