【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(chǎn)生量急速增加。污泥成分復(fù)雜,處理困難,對(duì)環(huán)境危害大,污泥資源化處理技術(shù)已成為研究熱點(diǎn)。作為實(shí)現(xiàn)污泥減量化、無(wú)害化、資源化的污泥建材利用,具有廣闊的發(fā)展應(yīng)用前景。本文依托國(guó)家科技重大專項(xiàng)-水專項(xiàng)(2010ZX07319-002)和江蘇省2014年環(huán)�？蒲杏�(jì)劃(2014028),針對(duì)國(guó)內(nèi)外污泥處理處置技術(shù)發(fā)展和應(yīng)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(shù)。根據(jù)發(fā)泡倍數(shù)大、泡沫半衰期長(zhǎng)和穩(wěn)泡劑互不干擾的評(píng)價(jià)指標(biāo),優(yōu)選出復(fù)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(shí)驗(yàn)臺(tái)及模具,通過(guò)正交實(shí)驗(yàn),建立密度、抗壓強(qiáng)度和導(dǎo)熱系數(shù)的綜合評(píng)價(jià)指標(biāo),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(shè)計(jì)制作蒸壓釜,通過(guò)正交實(shí)驗(yàn),提出抗壓強(qiáng)度、導(dǎo)熱系數(shù)和吸水率的綜合評(píng)價(jià)指標(biāo),得出3d靜停時(shí)間,150℃蒸壓溫度和3h保溫時(shí)間為最佳蒸壓養(yǎng)護(hù)條件,制備的污泥基發(fā)泡保溫材料密度、抗壓強(qiáng)度、導(dǎo)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(dá)到無(wú)機(jī)發(fā)泡保溫板國(guó)家行業(yè)標(biāo)準(zhǔn)JG/T266-2011中A06、C0.5、A03和W15的相應(yīng)指標(biāo)要求。蒸壓養(yǎng)護(hù)過(guò)程對(duì)污泥發(fā)泡保溫板的抗壓強(qiáng)度和保溫性能的提升以及縮短水化成型時(shí)間的作用顯著。本文探究了成型及蒸壓條件對(duì)重金屬固化作用的影響,發(fā)現(xiàn)經(jīng)蒸壓養(yǎng)護(hù)的水泥-粉煤灰-工程砂體系對(duì)污泥中重金屬具有良好的固化作用,對(duì)含重金屬污泥的資源化利用具有一定的參考價(jià)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(hào)：2165254