本文選題：煤液化殘渣 + 特性�。� 參考：《湖南農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：我國的煤炭資源豐富,是主要的化工和能源原料。煤液化技術(shù)作為一種潔凈煤技術(shù),是一種清潔、高效、經(jīng)濟型的煤化工技術(shù),可以有效利用我國的煤資源,成為新型煤化工技術(shù)的研究熱點。本文全面系統(tǒng)地分析了神華煤液化殘渣的來源組成、腐蝕性、反應(yīng)性、易燃性、浸出毒性、毒性物質(zhì)含量等危險特性,為煤液化殘渣的加工利用做基礎(chǔ)性的準(zhǔn)備工作。通過實驗筆者發(fā)現(xiàn)液化渣不具有腐蝕性、反應(yīng)性、易燃性和浸出毒性。主要的污染特性為毒性物質(zhì)含量。通過對原料煤,以及另一種煤化工產(chǎn)物-煤焦油進行實驗與液化渣進行對比以及煤與液化渣摻燒工況的試驗分析煤液化殘渣作為焚燒燃料的可行性。采用熱重分析儀分析了液化渣、煤、煤焦油和煤與液化渣摻燒物料的燃燒特性,并通過管式爐模擬試驗,研究不同溫度下?lián)綗裏煔庵斜较滴锖投喹h(huán)芳烴的排放特征。結(jié)果表明：煤、液化渣和煤焦油燃燒特性存在較大差異,液化渣主要燃燒過程所發(fā)生的溫度區(qū)間為560～820℃,明顯高于煤和煤焦油的主要燃燒溫度區(qū)間。煤與液化渣之間燃燒特性差異導(dǎo)致2種物料在摻燒過程中相互影響；液化渣在700℃燃燒時苯系物排放量達到最大,為132.2mg/kg,多環(huán)芳烴排放量最小,為11.30mg/kg。由于2種物料燃燒過程的相互影響,500℃下的摻燒苯系物排放量為23.5mg/kg,遠(yuǎn)小于理論值,≥1700℃條件下?lián)綗较滴锱欧帕繛?72.6mg/kg,遠(yuǎn)大于理論值。多環(huán)芳烴摻燒排放量都遠(yuǎn)遠(yuǎn)大于理論值。700℃和1200℃時排放量較小,分別為138.7mg/kg、157.Omg/kg,其中大部分為2-3環(huán)多環(huán)芳烴。由此得出結(jié)論：液化渣無論是單獨焚燒還是摻燒情況下,低溫條件下焚燒煙氣中苯系物和多環(huán)芳烴排放量遠(yuǎn)遠(yuǎn)大于高溫(≥850℃)條件下,因此液化渣的焚燒處置或燃料化利用應(yīng)選擇高溫爐型。同時,我們對比了工廠摻燒試燒過程,系統(tǒng)采集了各節(jié)點排放煙氣和爐膛底渣,測定了底渣,煙氣中各污染物的含量,研究了不同工況下污染物排放的變化。液化渣在CFB鍋爐中摻燒,對多環(huán)芳烴、UP-POPs和重金屬的排放基本沒有影響,但是會造成二氧化硫、煙塵、總烴、揮發(fā)性鹵代烴和苯系物排放的增加。Texaco(德士古)氣化爐摻燒15%液化渣,對各類煙氣(尾氣)、和固體廢物中特征有機污染物的影響較小,表明由于氣化爐溫度較高,有機物焚毀較為徹底,有機污染物排放的環(huán)境風(fēng)險較小。
[Abstract]:China's coal resources are rich, is the main chemical and energy raw materials. As a clean coal technology, coal liquefaction technology is a kind of clean, efficient and economical coal chemical technology, which can effectively utilize the coal resources in China and become the research hotspot of new coal chemical technology. In this paper, the source composition, corrosivity, reactivity, flammability, leaching toxicity and toxic substance content of the coal liquefaction residue of Shenhua are analyzed systematically and the basic preparation work for the processing and utilization of the coal liquefaction residue is made. The author found that the liquefaction slag is not corrosive, reactive, flammable and leaching toxicity. The main pollution characteristic is the content of toxic substances. The feasibility of coal liquefaction residue as incineration fuel was analyzed by comparison of raw coal, coal tar, another coal chemical product, and liquefaction slag, as well as the mixed burning condition of coal and liquefaction slag. The combustion characteristics of liquefied slag, coal tar and coal mixed with liquefied slag were analyzed by thermogravimetric analysis. The emission characteristics of benzene series and polycyclic aromatic hydrocarbons (PAHs) in flue gas at different temperatures were studied by tube furnace simulation test. The results show that the combustion characteristics of coal, liquefied slag and coal tar are quite different. The temperature range of the main combustion process of liquefied slag is 560,820 鈩，

本文編號：1911951