本文關(guān)鍵詞：脫墨污泥熱解工藝研究　出處：《齊魯工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 脫墨污泥 熱重分析 動(dòng)力學(xué) 催化熱解

【摘要】：本論文主要探討了影響脫墨污泥熱解特性的相關(guān)因素。分別采用環(huán)境掃描電鏡觀測(cè)脫墨污泥的形貌,傅里葉紅外光譜儀分析脫墨污泥內(nèi)含物質(zhì)的分子結(jié)構(gòu),電感耦合等離子體發(fā)射光譜儀檢測(cè)其金屬元素含量,從而對(duì)脫墨污泥的物化性質(zhì)進(jìn)行研究；然后通過(guò)熱重分析儀研究脫墨污泥的熱解特性,并對(duì)熱解過(guò)程中得到的失重曲線進(jìn)行模擬,進(jìn)而對(duì)脫墨污泥的熱解動(dòng)力學(xué)進(jìn)行探索研究；同時(shí),采用熱重-紅外聯(lián)用技術(shù)探索催化劑對(duì)脫墨污泥熱解的影響；最后,利用管式爐熱解脫墨污泥,采用氣相色譜儀、氣相色譜質(zhì)譜聯(lián)用儀、元素分析儀和傅里葉紅外光譜儀分析熱解溫度對(duì)脫墨污泥熱解產(chǎn)物的影響。脫墨污泥的物化性質(zhì)研究結(jié)果表明,脫墨污泥中含有大量的有機(jī)物,有機(jī)物主要為細(xì)小纖維和油墨。脫墨污泥的無(wú)機(jī)物中碳酸鈣的含量較多,還含有部分高嶺土。脫墨污泥所含的金屬元素中Ca元素含量最高,Al元素含量其次,重金屬元素含量較低,并且多數(shù)金屬元素含量隨著焚燒溫度的升高而減少。采用熱重分析方法研究脫墨污泥的熱解特性及熱解動(dòng)力學(xué),結(jié)果表明脫墨污泥的熱解反應(yīng)能夠分成3個(gè)階段：水分脫除階段、主要熱解階段和殘?zhí)考盁o(wú)機(jī)填料分解階段。脫墨污泥熱解動(dòng)力學(xué)研究發(fā)現(xiàn),利用一級(jí)三段模型模擬的污泥熱解過(guò)程效果最好。脫墨污泥熱解的熱重(TG)曲線和微分熱重曲線(DTG)曲線表明,隨著升溫速率的增大,低溫段和高溫段主反應(yīng)溫區(qū)的起始溫度和峰值溫度均向高溫區(qū)域移動(dòng),殘余固體得率提高,反應(yīng)的活化能和頻率因子也增大。添加催化劑(MgCl2、NaCl、ZnCl2和CaCl2)對(duì)脫墨污泥的熱解有一定催化作用,不僅降低了熱解主反應(yīng)區(qū)的起始溫度、峰值溫度,還降低了反應(yīng)的活化能。利用TG-FTIR聯(lián)用技術(shù)研究催化劑(MgCl2和NaCl)對(duì)脫墨污泥熱解氣相產(chǎn)物的影響,結(jié)果表明添加MgCl2降低了脫墨污泥熱解溫度,使得CO、CO2和飽和C-H類物質(zhì)在較低的熱解溫度下生成,NaCl的添加對(duì)熱解氣相產(chǎn)物的影響不大。熱解溫度在500～800℃范圍內(nèi),脫墨污泥管式爐熱解的三相產(chǎn)物中,固體產(chǎn)物的相對(duì)產(chǎn)率最高,氣體相對(duì)產(chǎn)率最低。隨熱解溫度的增加,氣體產(chǎn)物的相對(duì)產(chǎn)率不斷增大,固體的相對(duì)產(chǎn)率逐漸減小,但液體的變化不明顯。氣相產(chǎn)物中主要包括CO2、CO、CH4、H2和C2H4等；液相熱解油中主要含有苯的衍生物、多環(huán)芳香烴、茚和萘的衍生物及少量的烯烴、烷烴等,其中苯乙烯含量最高；固體產(chǎn)物的主要成分為碳酸鈣、高嶺土、偏高嶺土和氧化鈣等。
[Abstract]:In this paper, the related factors affecting the pyrolysis characteristics of deinked sludge were discussed. The morphology of deinked sludge was observed by environmental scanning electron microscope, and the molecular structure of the substance in deinking sludge was analyzed by Fourier transform infrared spectroscopy (FTIR). The content of metal elements was measured by inductively coupled plasma emission spectrometer (ICP-AES), and the physical and chemical properties of deinking sludge were studied. Then the pyrolysis characteristics of deinked sludge were studied by thermogravimetric analysis, and the weight loss curve obtained during pyrolysis was simulated, and the kinetics of deinking sludge pyrolysis was studied. At the same time, the effect of catalyst on the pyrolysis of deinked sludge was investigated by thermogravimetry and infrared spectroscopy. Finally, gas chromatograph and gas chromatography-mass spectrometry were used to deinking sludge from tube furnace. The effect of pyrolysis temperature on the pyrolysis products of deinked sludge was analyzed by elemental analyzer and Fourier transform infrared spectrometer. The results of physicochemical properties of deinking sludge showed that there were a lot of organic matter in deinking sludge. The organic matter is mainly fine fiber and ink. The content of calcium carbonate in inorganic matter of deinking sludge is more, and some kaolin is also contained. The content of Ca in deinking sludge is the highest. The content of Al was lower than that of heavy metal, and the content of most metal elements decreased with the increase of incineration temperature. Thermogravimetric analysis was used to study the pyrolysis characteristics and pyrolysis kinetics of deinking sludge. The results showed that the pyrolysis reaction of deinking sludge could be divided into three stages: water removal stage, main pyrolysis stage and decomposition stage of carbon and inorganic filler. The pyrolysis process of sludge simulated by the first-order three-stage model was the best. The TGG curve and the differential thermogravimetric curve (DTG) curve of deinking sludge pyrolysis showed that with the increase of heating rate. The initial temperature and peak temperature of the main reaction temperature region in the low temperature section and the high temperature stage moved to the high temperature region, the yield of the residual solids increased, the activation energy and the frequency factor of the reaction also increased, and the catalyst MgCl 2 was added. NaCl-ZnCl _ 2 and CaCl _ 2) can catalyze the pyrolysis of deinked sludge, which not only reduces the initial temperature and peak temperature of the main pyrolysis zone. The activation energy of the reaction was also reduced. The effect of catalysts MgCl _ 2 and NaCl on the gas phase products of deinking sludge was studied by TG-FTIR. The results showed that the addition of MgCl2 reduced the pyrolysis temperature of deinked sludge and resulted in the formation of CO-CO _ 2 and saturated C-H at lower pyrolysis temperature. The addition of NaCl had little effect on the pyrolysis gas phase product. The relative yield of solid product was the highest in the three phase pyrolysis products of deinking sludge tube furnace at 500 ~ 800 鈩，

本文編號(hào)：1439215