【摘要】：印染污泥是印染、紡織廠對(duì)印染污水處理后產(chǎn)生的固形產(chǎn)物。目前,對(duì)印染污泥的處理存在隨意傾倒放置的亂象,給環(huán)境帶來(lái)了嚴(yán)重危害,尋找合適的處理處置方法勢(shì)在必行。對(duì)其焚燒可以使印染污泥中的有機(jī)物、重金屬、病原體等進(jìn)一步的減量化、穩(wěn)定化和無(wú)害化,進(jìn)而實(shí)現(xiàn)印染污泥的能源化、資源化。印染污泥與燃煤的摻燒是污泥焚燒資源化利用的有效措施。摻燒不但實(shí)現(xiàn)了對(duì)印染污泥的處理,而且能夠?qū)⑵淠茉椿谩綗梢允褂∪疚勰嗵幚硖幹霉ぷ骺沙掷m(xù)性發(fā)展。而國(guó)內(nèi)目前這類(lèi)試驗(yàn)還剛剛起步。本研究以Fe-絮凝降阻法處理的印染污泥為研究對(duì)象,采用熱重分析方法研究了深度處理的印染污泥和印染污泥與煤混合樣這兩種樣品的焚燒特性,對(duì)焚燒失重最大階段進(jìn)行了動(dòng)力學(xué)分析。擬合得到了焚燒失重的速率方程,為直接由反應(yīng)時(shí)間來(lái)確定最后失重量提供理論依據(jù)。并探索出了印染污泥與煤混合焚燒的最佳比例,為印染污泥的工業(yè)焚燒工藝提供理論支持。本研究得出如下結(jié)論：(1)干燥時(shí)間為2h的印染污泥單獨(dú)焚燒過(guò)程中最大失重階段(即揮發(fā)分的析出和燃燒階段)：失重峰值前,反應(yīng)活化能為E=7.227 kJ/mol,為0.5級(jí)反應(yīng),峰值后E=87.040kJ/mol,為2級(jí)反應(yīng),經(jīng)線性回歸方程驗(yàn)證,相關(guān)系數(shù)R2分別為：0.9936、0.9910。比較峰值前后的活化能大小可知印染污泥單獨(dú)焚燒時(shí),其含有的小分子物質(zhì)的析出和燃燒比較容易,而大分子物質(zhì)燃燒所需活化能較高。對(duì)峰值前、后失重速率方程擬合,得出：峰值前失重速率方程為：y=9.00318-0.09968x,相關(guān)系數(shù)R2：0.9981。峰值后為：y=5.576+2.105/(1+exp((x-18.076)/1.349)),R2：0.9978。在印染污泥工業(yè)焚燒處置時(shí),可以為由反應(yīng)時(shí)間來(lái)計(jì)算失重量提供理論依據(jù)。(2)在混煤焚燒中,結(jié)合混合樣的熱值與焚燒渣宏觀、微觀的結(jié)焦情況,得出：混煤質(zhì)量分?jǐn)?shù)為33%時(shí),熱值為20.662 kJ/kg,能較好的改善印染污泥焚燒的結(jié)焦情況,為最佳的混合比例。煤的添加比例為33%的混合試樣,在第三階段(493.8-700℃下)峰值前后均為2級(jí)反應(yīng),反應(yīng)活化能為E=268.542KJ/mol。此階段的失重方程式為：y=4.540+2.460/(1+exp((x-7.898)/2.021)),相關(guān)系數(shù)R2為：0.9998。該方程能夠完美表達(dá)此混合樣焚燒過(guò)程中第三階段的失重速率。本研究為印染污泥與煤混合焚燒的工業(yè)應(yīng)用提供基礎(chǔ)理論依據(jù)。
[Abstract]:Printing and dyeing sludge is a solid product produced by dyeing and printing wastewater treatment in textile mills. At present, the treatment of printing and dyeing sludge exists random dumping disorder, which brings serious harm to the environment, so it is imperative to find suitable treatment and disposal methods. Incineration can further reduce, stabilize and harmless the organic matter, heavy metals and pathogens in the printing and dyeing sludge, and then realize the energy and resource utilization of the printing and dyeing sludge. The mixing of printing and dyeing sludge with coal combustion is an effective measure for the utilization of sludge incineration. Mixed burning not only realizes the treatment of printing and dyeing sludge, but also can be used as energy source. Mixed burning can make the treatment and disposal of printing and dyeing sludge sustainable development. At present, this kind of experiment is still in its infancy in China. In this study, Fe- flocculation and resistance reduction method was used to treat printing and dyeing sludge. TGA method was used to study the incineration characteristics of advanced treatment dyeing sludge and dyeing sludge mixed with coal. Kinetic analysis of the maximum stage of incineration weightlessness was carried out. The rate equation of incineration weightlessness is obtained by fitting, which provides a theoretical basis for determining the final weight loss directly from the reaction time. The optimum proportion of printing and dyeing sludge and coal mixed incineration was explored, which provided theoretical support for the industrial incineration process of printing and dyeing sludge. The conclusions of this study are as follows: (1) the maximum weight loss stage (i.e. the precipitate and combustion stage of volatile matter) in the drying time of 2 h in the process of separate burning of printing and dyeing sludge: before the peak weight loss, the activation energy of the reaction is 0. 5 grade reaction with E7. 227 kJ/mol,. The peak value was 87.040kJ / mol, which was a second-order reaction, and the correlation coefficient R2 was 0.9936 ~ 0.9910 ~ (10), verified by linear regression equation. Comparing the activation energy before and after the peak value, it can be seen that when the printing and dyeing sludge is incineration alone, the precipitation and combustion of the small molecular matter contained in the sludge is easier, but the activation energy required for the combustion of the macromolecular matter is higher. By fitting the weightlessness rate equation before and after the peak value, it is concluded that the weight loss rate equation before the peak value is: YYI 9.00318-0.09968x. the correlation coefficient is R2: 0.9981. The peak value was 5.576 2.105 / (1 exp (x-18.076) / 1.349), R2: 0.9978. In the incineration disposal of printing and dyeing sludge industry, it can provide the theoretical basis for calculating the weight loss by reaction time. (2) in the mixed coal incineration, combining the calorific value of the mixed sample with the macroscopic and microscopic coking of the incineration slag, it is concluded that when the mass fraction of the mixed coal is 33%, The calorific value of 20.662 kJ/kg, can improve the coking of printing and dyeing sludge incineration, which is the best mixing ratio. In the third stage (493.8-700 鈩，

本文編號(hào)：2278305