本文選題：廢舊除塵布袋　切入點(diǎn)：活性炭　出處：《廣東工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：水泥行業(yè)粉塵污染十分嚴(yán)重,在粉塵治理過程中經(jīng)常用到袋式除塵器,而布袋作為除塵器的核心,因其使用壽命有限,每年都會(huì)更換大量的廢舊除塵布袋。目前,這些廢舊布袋并沒有得到安全有效的處理。本文以廣東龍門縣某水泥廠的廢舊布袋為研究對(duì)象,對(duì)其進(jìn)行工業(yè)分析及元素分析。采用熱重分析方法(TG-DTG),在高純氮?dú)庀聦?duì)廢舊布袋進(jìn)行熱重分析。分析結(jié)果表明：布袋的材質(zhì)主要為滌綸,揮發(fā)分含量高達(dá)88.35%,碳元素含量達(dá)62.77%,固定碳含量為9.43%。廢舊布袋的熱解過程可分為脫水干燥、炭化熱解、煅燒分解三個(gè)階段,廢舊布袋有較高的熱穩(wěn)定性,其熱解過程分布在一個(gè)比較窄的溫度范圍內(nèi),主要分布在370℃至535℃。以廢舊布袋為原料,KOH為活化劑,通過正交試驗(yàn)和單因素試驗(yàn),考察了堿炭比、活化溫度、活化時(shí)間和炭化溫度對(duì)活性炭吸附性能(碘吸附值和亞甲基藍(lán)吸附值)及產(chǎn)率的影響。利用物理混合和堿液浸漬兩種不同的前處理方式制得了活性炭樣品,確定了其最佳制備工藝條件,物理混合的最佳制備工藝條件為：堿炭比3、活化溫度700℃、活化時(shí)間50 min、炭化溫度500℃。該條件下制備的活性炭性能最佳,其碘吸附值、亞甲基藍(lán)吸附值和產(chǎn)率分別為1455.07 mg/g,100.5 mg/g和17.54%。堿液浸漬的最佳制備工藝條件為：浸漬比3、活化溫度750℃、活化時(shí)間70 min。其最佳樣品的碘吸附值為1047.49 mg/g,亞甲基藍(lán)吸附值為127.5 mg/g,產(chǎn)率為22.11%。采用全自動(dòng)孔徑分析儀,在77K下測(cè)定兩種最佳活性炭的N2等溫線,通過BET方程、t-polt法和BJH法計(jì)算及分析其比表面積、孔體積和孔徑分布等基礎(chǔ)數(shù)據(jù)。采用SEM以及FTIR等分析方法對(duì)活性炭樣品進(jìn)行表征,分析其表面形貌。結(jié)果顯示：物理混合制備的活性炭比表面積高達(dá)1586.7m2/g,總孔容達(dá)0.802 cm3/g,平均孔徑為2.022 nm。而堿液浸漬制備的活性炭比表面積達(dá)1086.3m2/g,總孔容達(dá)1.298cm3/g,平均孔徑為4.778 nm。物理混合對(duì)微孔影響較大,而堿液浸漬對(duì)中孔影響較大。氮?dú)馕降葴鼐�表明,活性炭樣品的吸附等溫線屬于Ⅰ型等溫線,孔徑分布以微孔為主。FTIR結(jié)果表明,廢舊布袋經(jīng)過熱解炭化之后,許多表面官能團(tuán)消失或發(fā)生較大的變化。SEM結(jié)果表明,活性炭表面粗糙,有較多的孔隙結(jié)構(gòu)。利用制備的活性炭樣品去吸附模擬剛果紅廢水,并與商品活性炭進(jìn)行比較。吸附試驗(yàn)表明,投加量為10g/L,原水pH值,溶液溫度為30℃,吸附時(shí)間為90 min的條件下,各活性炭樣品對(duì)剛果紅的吸附效果最佳,去除率都在80%以上。結(jié)果還表明,本試驗(yàn)制備的活性炭樣品性能普遍要優(yōu)于普通商品活性炭樣品。
[Abstract]:Dust pollution in cement industry is very serious. Bag dust remover is often used in the dust treatment process. As the core of dust collector, cloth bag, because of its limited service life, will replace a large number of waste dust removal bags every year. At present, These waste cloth bags have not been treated safely and effectively. This paper takes the waste cloth bags of a cement factory in Longmen County, Guangdong Province, as the research object. The industrial analysis and elemental analysis were carried out. The thermogravimetric analysis (TG-DTG) method was used to analyze the waste cloth bag in high purity nitrogen. The results showed that the material of the bag was mainly polyester fiber. The volatile content is as high as 88.35, the carbon content is 62.77 and the fixed carbon content is 9.43. The pyrolysis process of the waste cloth bag can be divided into three stages: dehydration and drying, carbonization pyrolysis, calcination and decomposition. The waste cloth bag has high thermal stability. The pyrolysis process was distributed in a relatively narrow temperature range, mainly from 370 鈩，

本文編號(hào)：1595644