本文選題：深度脫水污泥　切入點：深度脫水污泥磚　出處：《華僑大學(xué)》2014年碩士論文

【摘要】：國家環(huán)保部于2012年11月下發(fā)了（2012）157號文《關(guān)于加強(qiáng)城鎮(zhèn)污水處理廠污泥污染防治工作的通知》，要求出廠污泥含水率＜50%。針對這一要求，國內(nèi)部分污水處理廠對污泥脫水進(jìn)行了板框壓濾機(jī)深度脫水技術(shù)的升級改造，污泥由離心脫水污泥轉(zhuǎn)變成深度脫水污泥。但目前對于深度脫水污泥資源化技術(shù)的研究還鮮有報道。 本文對深度脫水污泥的資源化技術(shù)開展了一系列研究，主要直接利用深度脫水污泥制備燒結(jié)磚、透水磚；將深度脫水污泥制備燃料顆粒，再利用燃料顆粒制備燃料顆粒保溫磚，，并對磚的抗壓強(qiáng)度、保溫性能等進(jìn)行表征，同時通過重金屬浸出實驗，進(jìn)行安全性分析。結(jié)果如下： 隨著深度脫水污泥摻量的增多，深度脫水污泥磚的燒失率、吸水率、孔隙率增大，但抗壓強(qiáng)度減小。深度脫水污泥摻量為20%時，為磚體的最佳配比，其燒失率為15%；孔隙率為40%；抗壓強(qiáng)度可達(dá)到33MPa。重金屬浸出試驗的測試結(jié)果表明在深度脫水污泥磚中的九種重金屬達(dá)到《危險廢棄物鑒別標(biāo)準(zhǔn)浸出毒性鑒別》（GB5085.3-2007）標(biāo)準(zhǔn)。 采用深度脫水污泥制備的生物質(zhì)燃料顆粒，當(dāng)污泥摻量由0%增加到100%時，燃料顆粒的熱值由902kJ/kg增加到4514kJ/kg，且燃料顆�？稍�1000℃時實現(xiàn)完全燃盡。 利用燃料顆粒制備的燃料顆粒保溫磚，其燒失率、孔隙率、吸水率均隨著燃料顆粒中污泥含量的增多而增大，而抗壓強(qiáng)度則隨著摻量的增多而減小。當(dāng)污泥摻量為50%時，其燒失率、孔隙率、吸水率、抗壓強(qiáng)度可達(dá)到《普通燒結(jié)磚》（GB5101-2003）標(biāo)準(zhǔn)，導(dǎo)熱系數(shù)滿足≤1.5W/(m2·K)的要求，可以達(dá)到《夏熱冬冷地區(qū)居住建筑節(jié)能設(shè)計標(biāo)準(zhǔn)》（JGJ134-2010）規(guī)定，具有良好的保溫性能。凍融循環(huán)結(jié)果顯示：經(jīng)過25次凍融循環(huán)后，磚體的質(zhì)量損失率為0.55%，強(qiáng)度損失率為14.21%，均達(dá)標(biāo)。TCLP結(jié)果表明燃料顆粒磚的重金屬達(dá)標(biāo)。 采用Urea和Gravel作為造孔劑制備透水磚。對比發(fā)現(xiàn)Gravel具有更好的造孔性能。Gravel造孔劑添加量≤20%時，制備的透水磚抗壓強(qiáng)度、透水系數(shù)均達(dá)標(biāo)。且經(jīng)凍融循環(huán)后，Gravel透水磚的強(qiáng)度損失≤20%。Gravel透水磚的重金屬浸出結(jié)果達(dá)標(biāo)。 通過經(jīng)濟(jì)技術(shù)評估和減排衡算，每生產(chǎn)100萬塊深度脫水污泥磚和燃料顆粒磚就能實現(xiàn)76000元的經(jīng)濟(jì)效應(yīng)，同時分別減少2.203t和3.126t的二氧化硫排放。有效實現(xiàn)深度脫水污泥的資源化。
[Abstract]:In November 2012, the Ministry of Environmental Protection issued document No. 157 on strengthening the Prevention and Control of sludge pollution in Municipal sewage treatment plants, which requires that the moisture content of the sludge from the factory be less than 50. In view of this request, Some domestic sewage treatment plants have upgraded the deep dewatering technology of plate and frame filter press. Sludge is changed from centrifugal dewatered sludge to deep dewatered sludge, but there are few reports on the technology of deep dewatered sludge resource utilization. In this paper, a series of researches have been carried out on the recycling technology of deep dewatered sludge, which mainly uses deep dewatered sludge to prepare sintered brick and permeable brick, and to prepare fuel particles from deep dewatered sludge. The thermal insulation brick of fuel particle was prepared by using fuel particles. The compressive strength and thermal insulation property of the brick were characterized. The safety analysis was carried out through heavy metal leaching experiment. The results are as follows:. With the increase of the amount of deep dewatered sludge, the burning loss, water absorption and porosity of deep dewatered sludge brick increase, but the compressive strength decreases. Its burning loss rate is 15, porosity is 40 and compressive strength can reach 33 MPa. The results of heavy metal leaching test show that nine heavy metals in deep dewatered sludge brick meet the standard of "Hazardous waste Identification Standard leaching toxicity Identification" GB5085.3-2007). When the sludge content increased from 0% to 100%, the calorific value of the fuel particles increased from 902kJ/kg to 4514kJ / kg, and the fuel particles could be completely burned out at 1000 鈩

本文編號：1670695