焦爐煙氣脫硫脫硝工藝優(yōu)化與設計
[Abstract]:In recent years, the increasingly serious air pollution in China directly affects the health and life of people. Therefore, the state has put forward a clear standard for the emission of sulfur dioxide and nitrogen oxides in the flue gas of iron and steel industry. On the basis of previous studies, through analyzing the typical desulphurization and denitrification processes in China and synthesizing the characteristics of the flue gas of Masteel No.5 coke oven, four sets of desulphurization and denitrification technology schemes are put forward. The process route of first SCR denitrification, then waste heat recovery, and finally wet desulfurization was determined. The main parameters of the process were simulated and analyzed by means of material conservation, heat conservation and equipment selection demonstration, as well as large scale chemical simulation software Aspen Plus. The effects of flue gas flow rate, ammonia to nitrogen ratio on denitrification process, liquid-gas ratio and calcium to sulfur ratio on desulfurization process were investigated. Finally, economic analysis was carried out. The simulation results show that: (1) when the flue gas velocity is 2~6m/s, the removal rate of no decreases with the increase of flue gas velocity, but considering the actual operation effect of the process, the lowest flow rate is not adopted. The removal rate of no can reach 84.6 when the flow rate of flue gas is 3.2~3.6m/s. (2) when the ratio of NH3/NO is 1 ~ 1.5, the removal rate of no increases with the increase of ratio, and the concentration of no is almost unchanged when the ratio reaches 1.5. In order to prevent excessive ammonia from escaping, Generally, NH3/NO is about 1.05, and the removal rate of no can reach 82.4. (3) in the desulfurization process, it is found that when the ratio of liquid to gas is 0.8 ~ 2.2, the desulfurization rate increases with the increase of solution content, and when the ratio of liquid to gas reaches 1.3, the desulfurization rate reaches 99.7. (4) in the desulfurization process, It is found that with the increase of calcium carbonate dosage, the desulphurization rate increases. When the Ca / S ratio is about 0.5 (when calcium carbonate 70kg is added per hour), the flow rate of sulfur dioxide changes from the original 1.37kmol/h to 0.023 kmol / h, and the removal rate is close to 100. The above sulfur dioxide is completely dissolved in the solution. The formation of hydrogen sulfite ion and calcium sulfite, but with the increase of calcium carbonate, the reaction of sulfite ion with calcium carbonate to form calcium sulfite, which led to the decrease of sulfite ion and the increase of calcium sulfite. The ratio of calcium to sulfur is 1 (adding calcium carbonate 137kg per hour) and the flow rate of calcium sulfite dihydrate is 1.33 kmol / h. Almost all sulfur dioxide is converted into calcium sulfite dihydrate and oxidized to calcium sulfate dihydrate.
【學位授予單位】:安徽工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:X784
【參考文獻】
相關(guān)期刊論文 前10條
1 張有禮;;煙氣脫硝技術(shù)的研究現(xiàn)狀與進展[J];能源與節(jié)能;2016年09期
2 倪建東;;焦爐煙道氣同時脫硫脫硝技術(shù)路線探討[J];寶鋼技術(shù);2016年01期
3 王志雄;;煙氣脫硫脫硝一體化工藝技術(shù)研究[J];化工中間體;2015年10期
4 張增輝;吳紅偉;;焦爐煙道氣凈化技術(shù)與工藝探討[J];化工管理;2015年23期
5 朱金偉;張凡;王洪昌;王凡;束韞;;燃煤煙氣脫硫脫硝技術(shù)的發(fā)展趨勢[J];環(huán)境工程技術(shù)學報;2015年03期
6 李君;盛重義;楊柳;鄧勁松;;臭氧氧化結(jié)合堿液吸收法煙氣脫硝的工藝研究[J];電力科技與環(huán)保;2014年06期
7 康新園;;燃煤煙氣脫硫脫硝一體化技術(shù)研究進展[J];潔凈煤技術(shù);2014年06期
8 周立榮;高春波;楊石玻;;鋼鐵廠燒結(jié)煙氣SCR脫硝技術(shù)應用探討[J];中國環(huán)保產(chǎn)業(yè);2014年06期
9 張建;李金科;;裂解爐NOx抑制技術(shù)[J];乙烯工業(yè);2013年04期
10 彭富昌;;釩系脫硝催化劑的研究現(xiàn)狀及發(fā)展趨勢[J];當代化工;2013年11期
相關(guān)會議論文 前1條
1 王漫;;鋼鐵廠燒結(jié)機煙氣脫硝技術(shù)選擇[A];2011年全國燒結(jié)煙氣脫硫技術(shù)交流會文集[C];2011年
相關(guān)重要報紙文章 前1條
1 施平;袁思琦;;寶鋼創(chuàng)新實施的燒結(jié)煙氣脫硝焦爐煙氣凈化項目引領國內(nèi)燒結(jié)煙氣脫硝脫二VA英技術(shù)邁向新臺階[N];世界金屬導報;2016年
相關(guān)博士學位論文 前5條
1 鄧佳佳;燃煤電廠煙氣脫硫吸收塔內(nèi)過程優(yōu)化及脫硫廢水的零排放處理[D];重慶大學;2015年
2 盧熙寧;半干法脫硫后的燒結(jié)煙氣低溫SCR脫硝催化劑的研發(fā)[D];北京科技大學;2015年
3 沈志剛;基于產(chǎn)物資源化的濕式鎂法煙氣脫硫技術(shù)研究[D];華東理工大學;2013年
4 朱惠峰;活性焦的制備及其煙氣脫硫的實驗研究[D];南京理工大學;2011年
5 莫建松;雙堿法煙氣脫硫工藝的可靠性研究及工業(yè)應用[D];浙江大學;2006年
相關(guān)碩士學位論文 前10條
1 吳立軍;改性柱狀活性炭脫硫脫硝性能研究[D];安徽工業(yè)大學;2016年
2 周小川;哈平南熱電廠煙氣超低排放項目改造方案設計[D];吉林大學;2016年
3 王楠;電廠煙氣脫硫脫硝控制系統(tǒng)的研究與應用[D];西安建筑科技大學;2015年
4 郭青;半干法脫除燃煤煙氣中SO_2、NO_x和Hg~0的實驗研究[D];華北電力大學;2015年
5 陳珂;富氧燃燒煙氣加壓脫硫脫硝過程的動力學模擬[D];華中科技大學;2014年
6 于大鵬;活性半焦煙氣脫硫脫硝催化劑制備與再生工藝設計[D];中國海洋大學;2013年
7 劉昭;檸檬酸鈉法煙氣脫硫工藝的研究[D];北京化工大學;2013年
8 彭瀟;工業(yè)煙氣活性焦法聯(lián)合脫硫脫硝技術(shù)研究[D];昆明理工大學;2013年
9 凌再莉;鈉鈣雙堿法脫硫技術(shù)及其工程實踐[D];蘭州大學;2013年
10 邱云龍;循環(huán)流化床煙氣脫硫技術(shù)[D];東北大學;2011年
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