本文選題：硫化氫 + 漿態(tài)床鼓泡反應(yīng)器��； 參考：《湖北工業(yè)大學(xué)》2017年碩士論文

【摘要】：硫化氫的脫除一直都是研究熱點(diǎn),并且已涌現(xiàn)了大量的研究成果,研究方法主要包括濕法脫硫、干法脫硫以及生物法脫硫。但是大多數(shù)脫硫方法在實(shí)際應(yīng)用中都存在不同的問(wèn)題。羥基氧化鐵因具有較高的硫容和較好的再生性能,受到人們的極大重視。然而羥基氧化鐵脫硫劑自開(kāi)發(fā)以來(lái)都是以固定床的形式應(yīng)用。固定床在更換催化劑上有很大的困難,一般需要人工去更換,這給工人的身體健康帶來(lái)很大的威脅。而且一些脫硫工藝在固定床中還會(huì)出現(xiàn)硫堵問(wèn)題。大多濕法脫硫工藝還用到了堿液,這不僅會(huì)使設(shè)備出現(xiàn)堿腐蝕,而且廢液還會(huì)造成二次污染。如果能利用羥基氧化鐵以水為分散系,用于漿態(tài)床脫硫化氫過(guò)程,就可以很好地解決這一問(wèn)題。本文首先利用硫酸亞鐵和碳酸鈉通過(guò)中和氧化法合成了羥基氧化鐵。研究結(jié)果表明,在硫酸亞鐵濃度為1 mol/L,溫度為60℃,pH值為8,陳化時(shí)間為3 h合成條件下,得到的羥基氧化鐵活性較好,脫硫反應(yīng)3 h后,硫容可達(dá)到103mgH_2S/g脫硫劑。利用XRD、IR、SEM、TEM以及氮?dú)饷摳轿降缺碚魇侄畏治龅贸?篩選出來(lái)的脫硫劑的主要成分是具有較高比表面的并具有介孔結(jié)構(gòu)的α-FeOOH。其次,本文首次探究了羥基氧化鐵以水為分散系,在漿態(tài)床鼓泡反應(yīng)器中的脫硫效果。主要研究了漿液固含量、表觀氣速、硫化氫初始濃度以及溫度等因素對(duì)系統(tǒng)脫硫性能的影響,以及空氣和過(guò)氧化氫對(duì)脫硫劑再生性能的影響。得到結(jié)論如下:在實(shí)驗(yàn)范圍內(nèi),漿液固含量、硫化氫濃度以及溫度對(duì)體系的脫硫影響較大,而表觀氣速的影響較小;本脫硫體系適宜的脫硫溫度為30℃,適合處理較低濃度的硫化氫氣體;床層脫硫效率較好,在適宜條件下,脫硫率可達(dá)95%;過(guò)氧化氫再生和空氣再生都能得到很好的脫硫劑再生性能,前者在縮短再生時(shí)間上有很大的優(yōu)勢(shì),5次再生循環(huán)使用性能仍保持在93%以上,而高價(jià)硫的生成是導(dǎo)致空氣再生方法中脫硫劑的循環(huán)使用性能下降的主要原因。最后,本文研究了鄰二甲苯應(yīng)用于體系中對(duì)硫磺萃取分離效率的研究。實(shí)驗(yàn)發(fā)現(xiàn),鄰二甲苯可以很好的分離本體系中的硫磺,在溫度為65℃,萃取時(shí)間為70min,液固比為15:1的萃取條件下,硫磺分離率可達(dá)97%以上。
[Abstract]:The removal of hydrogen sulfide has always been a hot topic, and a large number of research results have emerged. The research methods mainly include wet desulfurization, dry desulfurization and biological desulfurization. However, most desulfurization methods have different problems in practical application. Iron hydroxide has attracted much attention because of its high sulfur capacity and good regeneration performance. However, iron hydroxide desulfurizers have been used in fixed bed since their development. Fixed bed has great difficulty in changing catalyst, it usually needs to be replaced manually, which is a great threat to the health of workers. And some desulphurization processes in the fixed bed will also appear sulfur plugging problem. Most wet desulphurization processes also use lye, which not only causes alkali corrosion of equipment, but also causes secondary pollution of waste liquid. This problem can be well solved if Fe hydroxide can be used in the slurry bed to remove hydrogen sulfide by using water as dispersion system. In this paper, iron hydroxide was synthesized by neutralization and oxidation with ferrous sulfate and sodium carbonate. The results showed that under the conditions of ferrous sulfate concentration of 1 mol / L, temperature of 60 鈩，

本文編號(hào)：1832120