【摘要】：城市污泥是城市生活污水處理過程中產(chǎn)生的固體廢物,將其與煤混合制備污泥煤漿用做潔凈環(huán)保燃料或氣化原料是實(shí)現(xiàn)城市污泥資源化利用的重要途徑。本論文研究了半焦調(diào)質(zhì)城市污泥(簡稱SS)的特性、反應(yīng)性能及其成漿性能,創(chuàng)建了城市污泥制備污泥煤漿的新方法,其主要研究內(nèi)容與結(jié)論如下:采用熱重分析法研究了半焦與城市污泥混合物的燃燒性能,揭示了半焦添加量對(duì)城市污泥燃燒性能的影響規(guī)律。結(jié)果表明:半焦與城市污泥的混合物,隨半焦配比的增大,其燃燒性能變好,說明半焦能改善城市污泥的燃燒性能。當(dāng)半焦的配入比例大于40%時(shí),半焦與城市污泥的混合物的燃燒指紋曲線(DTG)為一個(gè)單峰,具有良好的燃燒性能。采用熱重分析法研究了SS與煤混合物的反應(yīng)性能,結(jié)果表明:煤的燃料比(F)是影響SS與煤的混合物的燃燒性能的關(guān)鍵因素,隨著煤的燃料比的減小,SS與煤的混合物的燃燒性能變好。當(dāng)煤的燃料比小于2.53時(shí),SS與煤的混合物的燃燒指紋曲線呈單峰,具有良好的燃燒性能。采用成漿實(shí)驗(yàn)法研究了半焦調(diào)質(zhì)城市污泥的成漿性能,結(jié)果表明:半焦的含量是影響半焦調(diào)質(zhì)城市污泥成漿性能的關(guān)鍵因素,半焦調(diào)質(zhì)城市污泥的成漿性能隨其半焦含量的增加而變好,當(dāng)半焦的含量增大到80%時(shí),半焦調(diào)質(zhì)城市污泥的定黏濃度仍只有33.88%,表明其成漿性能差,要制備達(dá)到國家水煤漿質(zhì)量三級(jí)標(biāo)準(zhǔn)的污泥煤漿,必須把半焦調(diào)質(zhì)城市污泥與成漿性能良好的煤混合制漿。基于半焦調(diào)質(zhì)城市污泥的特性,建立了城市污泥制備污泥煤漿的新方法。首先用半焦對(duì)城市污泥進(jìn)行調(diào)質(zhì),然后采用重力濃縮的方法對(duì)城市污泥進(jìn)行濃縮脫水得到半焦調(diào)質(zhì)城市污泥,將其與煤直接混合制漿得到污泥煤漿。該方法的特點(diǎn)是無需對(duì)城市污泥進(jìn)行機(jī)械脫水和預(yù)干燥,簡化了污泥煤漿的制備工藝,大大降低了污泥煤漿的制備成本,對(duì)節(jié)約資源,保護(hù)環(huán)境有重要意義。制備達(dá)到國家水煤漿質(zhì)量三級(jí)標(biāo)準(zhǔn)的污泥煤漿,應(yīng)具備以下工藝技術(shù)條件:(1)煤炭應(yīng)具有良好的成漿性能,其內(nèi)在水分小于5.32%;(2)物料的粒度組成中,小于74μm的顆粒物占比為75%;(3)用萘系NF作污泥煤漿的添加劑,其添加量為總漿體質(zhì)量的1%;(4)半焦調(diào)質(zhì)城市污泥的配入比例應(yīng)小于煤與半焦調(diào)質(zhì)城市污泥總質(zhì)量(干基)的7.72%。
[Abstract]:Municipal sludge is a kind of solid waste produced in the process of municipal domestic sewage treatment. It is an important way to make sludge and coal slurry used as clean and environmentally friendly fuel or gasification raw material to realize the utilization of municipal sludge resource. In this paper, the characteristics, reaction properties and slurry properties of SS were studied, and a new method of producing sludge coal slurry from municipal sludge was established. The main contents and conclusions are as follows: the combustion performance of the mixture of char and municipal sludge was studied by thermogravimetric analysis, and the effect of the content of char on the combustion performance of municipal sludge was revealed. The results show that the combustion performance of the mixture of semi-coke and municipal sludge is improved with the increase of the ratio of semi-coke to municipal sludge, which indicates that the semi-coke can improve the combustion performance of municipal sludge. The combustion fingerprint curve of the mixture of semi-coke and municipal sludge is a single peak (DTG) with good combustion performance when the proportion of semi-coke is greater than 40. The reactivity of the mixture of SS and coal was studied by thermogravimetric analysis. The results show that the ratio of coal to fuel (F) is the key factor affecting the combustion performance of the mixture of SS and coal. The combustion performance of the mixture of SS and coal becomes better with the decrease of the fuel ratio of coal. When the fuel ratio of coal is less than 2.53, the combustion fingerprint curve of the mixture of SS and coal shows a single peak, and it has good combustion performance. In this paper, the pulp forming performance of municipal sludge modified by semi-coke was studied by means of pulping experiment. The results showed that the content of semi-coke was the key factor to influence the sluriness of municipal sludge. When the content of semi-coke increases to 80%, the fixed viscosity concentration of the sludge is only 33.88%, which indicates that the pulp forming performance is poor. In order to prepare the sludge coal slurry which meets the national standard of coal water slurry quality, it is necessary to mix the semi-coke modified municipal sludge with the coal slurry with good slurry properties. Based on the characteristics of semi-coke sludge, a new method for producing sludge coal slurry from municipal sludge was established. First, the municipal sludge was tempered with semi-coke, then the urban sludge was condensed and dewatered by gravity concentration, and the sludge was directly mixed with coal to produce sludge and coal slurry. The characteristics of this method are that it does not need mechanical dewatering and pre-drying of municipal sludge, simplifies the preparation process of sludge coal slurry, greatly reduces the preparation cost of sludge coal slurry, and is of great significance for saving resources and protecting environment. The preparation of sludge coal slurry up to the third grade standard of national coal water slurry quality should have the following technical conditions: (1) the coal should have good slurry forming performance and its internal moisture content is less than 5.32; (2) in the particle size composition of the material, The proportion of particulate matter less than 74 渭 m was 75. (3) naphthalene NF was used as additive of sludge coal slurry, and its addition amount was 1 / 1 of the total slurry mass. (4) the proportion of municipal sludge mixed with semi-coke should be less than 7.72% of the total sludge mass (dry base) of coal and semi-coke modified city sludge.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703;TQ536

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 段清兵;張勝局;段靜;;水煤漿制備與應(yīng)用技術(shù)及發(fā)展展望[J];煤炭科學(xué)技術(shù);2017年01期

2 張亞婧;;我國城市污水處理廠污泥中重金屬分布特征及變化規(guī)律[J];科技創(chuàng)新與應(yīng)用;2016年36期

3 戴財(cái)勝;劉學(xué)鵬;馬淞江;;水焦?jié){的制備及其流變特性[J];熱能動(dòng)力工程;2016年12期

4 戴財(cái)勝;劉學(xué)鵬;戴謹(jǐn)澤;馬淞江;;鋸木屑與褐煤共熱解生物焦的成漿性能及其流變特性[J];燃料化學(xué)學(xué)報(bào);2016年07期

5 馬淞江;張仲歡;王勁;戴財(cái)勝;徐歡;;半焦與城市污泥混合物的燃燒性能研究[J];環(huán)境污染與防治;2016年05期

6 徐志永;白春華;郭振坤;李光輝;樊雪敏;;粒度級(jí)配對(duì)補(bǔ)連塔低階煤成漿性的影響[J];煤炭技術(shù);2016年05期

7 曾珠;;現(xiàn)代微生物技術(shù)在城市污水處理中的應(yīng)用探究[J];科技創(chuàng)新與應(yīng)用;2016年12期

8 陸小泉;;我國煤炭清潔開發(fā)利用現(xiàn)狀及發(fā)展建議[J];煤炭工程;2016年03期

9 張冬;董岳;黃瑛;張棟;姚一思;;國內(nèi)外污泥處理處置技術(shù)研究與應(yīng)用現(xiàn)狀[J];環(huán)境工程;2015年S1期

10 孫海勇;;市政污泥資源化利用技術(shù)研究進(jìn)展[J];潔凈煤技術(shù);2015年04期

相關(guān)博士學(xué)位論文 前2條

1 虞育杰;褐煤水熱脫水提質(zhì)制備高濃度水煤漿的基礎(chǔ)研究[D];浙江大學(xué);2013年

2 李俊;微生物菌劑對(duì)污水處理廠污泥減量的影響研究[D];西南大學(xué);2008年

相關(guān)碩士學(xué)位論文 前6條

1 劉流;自來水廠污泥和污水處理廠污泥摻混的脫水性能研究[D];浙江工業(yè)大學(xué);2015年

2 劉良良;污泥與煤制潔凈燃料研究[D];湖南科技大學(xué);2014年

3 趙豐毅;城市污水處理廠污泥處置工藝分析與研究[D];長安大學(xué);2013年

4 于俊杰;城市中小污水處理廠污泥脫水藥劑的研究[D];合肥工業(yè)大學(xué);2013年

5 李仁波;污泥陶粒的制備及其在廢水處理中的應(yīng)用研究[D];山東大學(xué);2008年

6 鹿雯;陽離子表面活性劑對(duì)污泥脫水性能的改善和作用機(jī)理研究[D];昆明理工大學(xué);2007年

，

本文編號(hào)：2211348