發(fā)布時(shí)間：2018-04-19 05:32

  本文選題：村鎮(zhèn) + 生活垃圾��； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：在對(duì)廣西全區(qū)村鎮(zhèn)生活垃圾和水泥熟料生產(chǎn)線分布調(diào)研的基礎(chǔ)上,提出利用新型干法水泥窯協(xié)同處置村鎮(zhèn)生活垃圾的新模式。本研究以4500 t/d新型干法水泥窯生產(chǎn)線為依托,對(duì)生活垃圾簡(jiǎn)單預(yù)處理之后,由上料設(shè)備喂入三次風(fēng)管末端,被三次風(fēng)帶入分解爐中徹底焚燒；監(jiān)測(cè)和探討了在水泥窯系統(tǒng)中定量摻燒20、50和80t/d生活垃圾過程中對(duì)水泥窯工況參數(shù)及產(chǎn)量,水泥熟料質(zhì)量和污染物排放情況的影響。主要研究成果如下：(1)村鎮(zhèn)生活垃圾的含水量大,熱值低。垃圾灰分含硅量最高,其次是鈣、鐵、鋁,與煤灰的化學(xué)成分相似。(2)水泥窯摻燒80t/d范圍內(nèi)的村鎮(zhèn)生活垃圾可降低單位水泥熟料的熱耗,且不影響水泥熟料的產(chǎn)量。當(dāng)摻燒量為80t/d時(shí),與未摻燒生活垃圾的熱耗相比降低了10%。(3)摻燒一定量的生活垃圾會(huì)引起水泥窯系統(tǒng)的瞬時(shí)溫度和負(fù)壓波動(dòng)增大,特別是摻燒生活垃圾的量為50t/d時(shí)影響較大,但喂料穩(wěn)定后瞬時(shí)溫度與負(fù)壓又恢復(fù)正常,生產(chǎn)工況的各參數(shù)波動(dòng)仍處于可控范圍之內(nèi)；同時(shí)對(duì)水泥窯系統(tǒng)各監(jiān)測(cè)點(diǎn)的平均溫度和負(fù)壓幾乎無影響,且未顯示出對(duì)窯內(nèi)襯材料造成結(jié)皮的危害。(4)水泥窯摻燒生活垃圾后生產(chǎn)的水泥熟料的石灰石飽和系數(shù)(KH)略為降低,硅率(SM)和鋁率(IM)變化不大。生活垃圾的摻燒可能導(dǎo)致水泥28 d強(qiáng)度的略為降低,但仍符合國(guó)家現(xiàn)行標(biāo)準(zhǔn)通用硅酸鹽水泥中P·I42.5水泥的要求。(5)采用ICP-MS分別對(duì)生活垃圾灰分和水泥熟料中14種重金屬含量進(jìn)行了檢測(cè)。生活垃圾中含量最多的為鉻、錳、鎳、鉛,在水泥窯內(nèi)強(qiáng)氧化環(huán)境和堿性氣氛等條件下經(jīng)高溫煅燒后,最終大部分重金屬被固定到水泥熟料當(dāng)中。(6)摻燒80t/d范圍內(nèi)的村鎮(zhèn)生活垃圾不會(huì)增加水泥窯窯尾排放煙氣中NOX、SO2和顆粒物的含量。煙氣顆粒物中可揮發(fā)性重金屬含量會(huì)隨生活垃圾摻燒量的增大而增加,而難揮發(fā)性重金屬在顆粒物中的含量很低,且均符合國(guó)家現(xiàn)行標(biāo)準(zhǔn)。(7)生活垃圾摻燒量為80t/d時(shí),水泥窯系統(tǒng)窯尾煙氣中二嗯英的濃度經(jīng)檢測(cè)為0.0040 ng TEQ/Nm3,遠(yuǎn)遠(yuǎn)低于國(guó)家現(xiàn)行標(biāo)準(zhǔn)的0.100 ngTEQ/Nm3。
[Abstract]:On the basis of the investigation and investigation on the distribution of village and town domestic refuse and cement clinker production line in Guangxi, a new mode of cooperative disposal of village and town domestic refuse by using new dry cement kiln is put forward.Based on the 4500 t / d new dry cement kiln production line, after the simple pretreatment of domestic waste, the feeding equipment was fed into the end of the third air pipe, and was thoroughly burned in the calciner by the third air.The effects of mixing 2050 and 80t/d in cement kiln system on the operating parameters and output of cement kiln, the quality of cement clinker and the discharge of pollutants were investigated.The main research results are as follows: 1) the water content and calorific value of MSW are high and low.The content of silicon in ash is the highest, followed by calcium, iron and aluminum, similar to the chemical composition of coal ash. The cement kiln mixed with 80t/d can reduce the heat consumption of cement clinker and does not affect the output of cement clinker.When 80t/d is added, the heat consumption of MSW is reduced by 10% than that of MSW without mixing.) mixing of MSW with a certain amount of MSW will cause the fluctuation of instantaneous temperature and negative pressure of cement kiln system to increase, especially when the amount of MSW is 50t/d.However, the instantaneous temperature and negative pressure return to normal after the feed is stabilized, and the fluctuation of the parameters of the production condition is still within the controllable range, and the average temperature and negative pressure of the cement kiln system monitoring points are almost no influence.The limestone saturation coefficient (KH) of cement clinker produced by mixing MSW in cement kiln decreased slightly, but the silicon content (SMV) and aluminum content (IMM) did not change much.The mixing of MSW may lead to a slight decrease of cement strength in 28 d.The ash content of MSW and 14 kinds of heavy metals in cement clinker were detected by ICP-MS.The contents of chromium, manganese, nickel and lead are the most in domestic refuse. After calcined under the condition of strong oxidation environment and alkaline atmosphere in cement kiln,In the end, most of the heavy metals were immobilized in cement clinker. 6) the content of NOX so 2 and particulate matter in flue gas of cement kiln kiln was not increased by burning the MSW in the range of 80t/d.The content of volatile heavy metals in particulate matter of flue gas will increase with the increase of the amount of MSW, but the content of hard volatile heavy metals in particulate matter is very low, and both meet the current national standard. 7) when the amount of MSW mixed with MSW is 80t/d, the content of volatile heavy metals in particulate matter is very low.The concentration of Erin in the flue gas of cement kiln system was detected to be 0.0040 ng TEQ / Nm3, which is far lower than the current national standard of 0.100 ng TEQ / Nm3.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X799.3;TQ172.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 劉勁松;劉維屏;潘荷芳;馮元群;鞏宏平;;農(nóng)村簡(jiǎn)易垃圾焚燒爐周邊土壤二惡英分布研究[J];浙江大學(xué)學(xué)報(bào)(工學(xué)版);2010年03期

2 楊新華;孫九勝;王新勇;葛春輝;;生活垃圾堆肥對(duì)土壤重金屬含量及玉米產(chǎn)量、品質(zhì)的影響[J];新疆農(nóng)業(yè)科學(xué);2012年11期

3 陳偉定;;水泥生產(chǎn)過程協(xié)同處理生活垃圾技術(shù)的應(yīng)用[J];中國(guó)水泥;2014年07期

4 蔡玉良;邢濤;李波;吳建軍;肖國(guó)先;吳德厚;董家明;孫德群;楊學(xué)權(quán);俞剛;;水泥窯爐協(xié)同處置城市生活垃圾技術(shù)的控制過程及實(shí)施效果(中)[J];中國(guó)水泥;2014年10期

，

本文編號(hào)：1771811