本文選題：SDA旋轉(zhuǎn)噴霧脫硫 + 絕熱飽和溫差　； 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：鋼鐵行業(yè)生產(chǎn)過(guò)程中排放出大量的大氣污染物,對(duì)生態(tài)環(huán)境造成嚴(yán)重危害。焦化和燒結(jié)工序是鋼鐵行業(yè)生產(chǎn)流程中的兩個(gè)主要大氣污染源。本文針對(duì)焦?fàn)t和燒結(jié)煙氣特性,探討適宜的煙氣凈化方案并對(duì)焦?fàn)t煙氣脫硫以及燒結(jié)煙氣脫硝工藝遇到的關(guān)鍵問(wèn)題進(jìn)行研究。本文基于SDA(旋轉(zhuǎn)噴霧脫硫)中試試驗(yàn)臺(tái),對(duì)低含濕量、高煙溫的模擬焦?fàn)t煙氣進(jìn)行了脫硫?qū)嶒?yàn),研究高入口煙溫、高絕熱飽和溫差的條件下,Na2C03和Ca(OH)2兩種不同脫硫劑的脫硫特性。討論了化學(xué)計(jì)量比、脫硫塔入口煙溫、絕熱飽和溫差和脫硫煙氣溫降對(duì)脫硫效率的影響。實(shí)驗(yàn)結(jié)果表明,隨化學(xué)計(jì)量比增大,Na2CO3脫硫效率增長(zhǎng)速率比Ca(OH)2更快;SDA脫硫效率隨絕熱飽和溫差的增大呈指數(shù)形式下降;在保持出口煙氣溫度不變條件下,增大入口煙溫有利于提高脫硫效率;此外,增大脫硫煙氣溫降有利于提高脫硫效率。實(shí)驗(yàn)結(jié)果表明,Na2CO3更有利于實(shí)現(xiàn)焦?fàn)t煙氣高效脫硫。將SCR脫硝工藝運(yùn)用于燒結(jié)煙氣的主要困難在于燒結(jié)煙溫偏低,達(dá)不到SCR催化劑的活性溫度窗口。解決的辦法是利用熱煙氣與主煙氣進(jìn)行混合再熱來(lái)提升主煙氣的溫度。本文基于燒結(jié)煙氣混合再熱試驗(yàn)臺(tái),研究熱煙氣與空氣的混合特性。文章研究單管橫向射流和多孔射流兩種煙氣混合方式下,熱煙氣在近場(chǎng)區(qū)域的速度、溫度以及濃度分布特性。實(shí)驗(yàn)結(jié)果表明,多孔射流方式能夠有效的提升煙氣混合均勻度,加快煙氣的混合進(jìn)度;多孔射流紊動(dòng)熱混合結(jié)果受熱煙氣的射流穿透力、射流流量分布以及圓柱擾流等因素影響;多孔射流管13×Φ12 mm能夠形成最佳的溫度場(chǎng)和濃度場(chǎng)分布。
[Abstract]:A large amount of atmospheric pollutants are emitted from the production process of iron and steel industry, which causes serious harm to the ecological environment. The coking and sintering processes are two main air pollution sources in the production process of iron and steel industry. According to the characteristics of coke oven and sintering flue gas, this paper discusses the suitable scheme of flue gas purification and studies the key problems of flue gas desulphurization and denitrification in coke oven. In this paper, the desulfurization experiments of simulated coke oven smoke with low moisture content and high smoke temperature were carried out on the basis of SDA (rotating spray desulphurization) pilot-scale test rig. The desulfurization characteristics of two different desulfurizers, Na2C03 and Ca(OH)2, were studied under the conditions of high inlet smoke temperature and high adiabatic saturation temperature difference. The effects of stoichiometric ratio, inlet flue gas temperature of desulfurizer, adiabatic saturation temperature difference and temperature drop of desulfurization smoke on desulfurization efficiency were discussed. The experimental results show that with the increase of stoichiometric ratio, the increasing rate of desulfurization efficiency of Na2CO3 is faster than that of Ca(OH)2, and the desulfurization efficiency decreases exponentially with the increase of adiabatic saturation temperature. Increasing the inlet flue gas temperature can improve the desulfurization efficiency, in addition, increasing the temperature drop of the flue gas can improve the desulphurization efficiency. The experimental results show that Na _ 2CO _ 3 is more propitious to realize high efficiency desulfurization of coke oven flue gas. The main difficulty of applying SCR denitrification process to sintering flue gas is that the sintering smoke temperature is low and can not reach the active temperature window of SCR catalyst. The solution is to raise the temperature of the main flue gas by mixing the hot flue gas with the main flue gas. In this paper, the mixing characteristics of hot flue gas and air are studied on the basis of sintering flue gas mixing reheat test rig. In this paper, the velocity, temperature and concentration distribution of hot flue gas in the near field are studied under the two mixing modes of single pipe transverse jet and porous jet. The experimental results show that the porous jet method can effectively improve the uniformity of flue gas mixing and accelerate the mixing progress of flue gas, and the jet penetration of heated flue gas caused by turbulent heat mixing of porous jet can be improved. The optimum temperature field and concentration field can be formed in a porous jet tube with 13 脳 桅 12mm, which is influenced by jet flow distribution and cylinder turbulence.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X757

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 倪建東;;焦?fàn)t煙道氣同時(shí)脫硫脫硝技術(shù)路線探討[J];寶鋼技術(shù);2016年01期

2 張文效;姚潤(rùn)生;沈炳龍;;焦?fàn)t煙氣先脫硫后脫硝的新工藝研究[J];煤炭加工與綜合利用;2015年12期

3 尹華;呂文彬;孫剛森;孫廣明;洪賓;;焦?fàn)t煙道氣凈化技術(shù)與工藝探討[J];燃料與化工;2015年02期

4 陳仁杰;闞海東;;霧霾污染與人體健康[J];自然雜志;2013年05期

5 顧兵;何申富;姜?jiǎng)?chuàng)業(yè);;SDA脫硫工藝在燒結(jié)煙氣脫硫中的應(yīng)用[J];環(huán)境工程;2013年02期

6 吳江松;;旋轉(zhuǎn)噴霧煙氣脫硫技術(shù)工藝分析[J];現(xiàn)代冶金;2012年01期

7 馮占立;張慶文;常治鐵;周航;李修梅;;旋轉(zhuǎn)噴霧干燥煙氣脫硫技術(shù)在燒結(jié)機(jī)上的應(yīng)用[J];中國(guó)冶金;2011年11期

8 李國(guó)能;林江;;旋轉(zhuǎn)橫流中側(cè)邊射流偏斜和擴(kuò)散的實(shí)驗(yàn)研究[J];中國(guó)電機(jī)工程學(xué)報(bào);2011年17期

9 張建宇;潘荔;楊帆;劉嘉;;中國(guó)燃煤電廠大氣污染物控制現(xiàn)狀分析[J];環(huán)境工程技術(shù)學(xué)報(bào);2011年03期

10 張新民;柴發(fā)合;王淑蘭;孫新章;韓梅;;中國(guó)酸雨研究現(xiàn)狀[J];環(huán)境科學(xué)研究;2010年05期

，

本文編號(hào)：1831037