本文選題：超重力 + 旋轉(zhuǎn)填料床　； 參考：《中北大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)天然氣凈化、石油加工、煤氣化等領(lǐng)域的快速發(fā)展，氣體中H2S的脫除尤為重要，在眾多脫硫技術(shù)中，絡(luò)合鐵脫硫技術(shù)以其高效、綠色等優(yōu)點(diǎn)而備受矚目。其中絡(luò)合鐵脫硫富液的再生好壞關(guān)乎著脫硫液能否正常循環(huán)利用，由于傳統(tǒng)的再生設(shè)備通常為再生塔或再生槽，存在傳質(zhì)效果差、氣液接觸時(shí)間長(zhǎng)等缺點(diǎn)，導(dǎo)致該技術(shù)在工業(yè)化應(yīng)用中存在再生效率低、絡(luò)合劑降解嚴(yán)重等缺點(diǎn)。本文對(duì)課題組前期開(kāi)發(fā)的新型脫硫液配方比例進(jìn)一步優(yōu)化，提出旋轉(zhuǎn)填料床再生脫硫富液的新工藝，并進(jìn)行了深入研究。 在絡(luò)合鐵脫硫液優(yōu)化方面，通過(guò)考察復(fù)配絡(luò)合劑比例、絡(luò)合劑與鐵比例、鐵濃度對(duì)脫硫率和穿透硫容的影響，，篩選性能更加優(yōu)良的脫硫液，并對(duì)其脫硫產(chǎn)物硫磺進(jìn)行了XRD和SEM分析，結(jié)果表明該硫磺為斜方晶型，S元素含量高達(dá)81.25%。 在研究脫硫液中氧氣傳質(zhì)方面，本文應(yīng)用雙膜理論對(duì)超重力技術(shù)強(qiáng)化氧氣在脫硫液中的傳質(zhì)機(jī)理進(jìn)行分析，建立氧氣傳質(zhì)的液相體積傳質(zhì)系數(shù)計(jì)算式，考察工藝參數(shù)對(duì)液相體積傳質(zhì)系數(shù)KLa的影響規(guī)律。結(jié)果表明，KLa隨超重力因子、氣量、液量和氧氣體積分?jǐn)?shù)的增大而增大，隨溫度的升高呈下降趨勢(shì)；相近條件下，旋轉(zhuǎn)填料床的KLa比傳統(tǒng)曝氣裝置提高了1個(gè)數(shù)量級(jí)，其強(qiáng)化傳質(zhì)效果顯著。 利用旋轉(zhuǎn)填料床強(qiáng)化氧氣傳質(zhì)的優(yōu)勢(shì)，本文將其應(yīng)用到絡(luò)合鐵脫硫富液的再生實(shí)驗(yàn)，確定實(shí)驗(yàn)范圍內(nèi)的適宜工藝參數(shù)。結(jié)果表明，再生率隨超重力因子、氣體流量的升高先增大后減小，隨再生溫度、氧氣體積分?jǐn)?shù)的升高而增大，隨液體流量、Fe2+Ln-初始濃度的增大而減小。處理Fe2+Ln-初始濃度0.02mol/L的脫硫富液，再生率可達(dá)60%以上，經(jīng)過(guò)兩級(jí)再生，再生率達(dá)到90%以上，第二級(jí)再生率為71%，相對(duì)第一級(jí)提高了10%。相比傳統(tǒng)曝氣再生，超重機(jī)再生可有效緩解絡(luò)合劑的降解。該再生技術(shù)可以有效提高再生效率、緩解絡(luò)合劑的降解、縮小設(shè)備體積，發(fā)展前景廣闊。
[Abstract]:With the rapid development of natural gas purification, petroleum processing, coal gasification and other fields in China, the removal of H2S in gas is particularly important. Among many desulfurization technologies, complex iron desulphurization technology has attracted much attention for its advantages of high efficiency and green. The regeneration of complex iron desulphurization rich liquid is related to whether the desulfurization liquid can be recycled normally. Because the traditional regeneration equipment is usually a regeneration tower or a regeneration tank, it has some shortcomings such as poor mass transfer effect, long gas-liquid contact time and so on. This technology has some disadvantages in industrial application, such as low regeneration efficiency and serious degradation of complexing agent. In this paper, the proportion of new desulphurization solution developed by our research group is further optimized, and a new technology of regenerating desulfurization and rich liquid in rotating packed bed is put forward and studied deeply. In the aspect of optimization of complex iron desulphurization solution, the effects of complexing agent ratio, complexing agent and iron ratio, iron concentration on desulphurization rate and penetration sulfur capacity were investigated to screen desulfurization solution with better performance. The desulfurization product sulfur was analyzed by XRD and SEM. The results showed that the sulfur content was as high as 81.25%. In the aspect of oxygen mass transfer in desulphurization solution, the mass transfer mechanism of oxygen enhanced by high gravity technology in desulfurization solution is analyzed by using double film theory, and the calculation formula of liquid volume mass transfer coefficient of oxygen mass transfer is established. The effect of process parameters on volume mass transfer coefficient (KLa) of liquid phase was investigated. The results show that the KLa of rotating packed bed increases by one order of magnitude compared with that of traditional aerator under similar conditions, and increases with the increase of hypergravity factor, gas volume, liquid content and oxygen volume fraction, and decreases with the increase of temperature. The effect of enhanced mass transfer is remarkable. Using the advantage of rotating packed bed to enhance oxygen mass transfer, this paper applies it to the regeneration experiment of complex iron desulphurization and rich liquid, and determines the appropriate technological parameters in the range of experiment. The results show that the regeneration rate increases first and then decreases with the increase of hypergravity factor, increases with the increase of regeneration temperature and oxygen volume fraction, and decreases with the increase of initial concentration of Fe2Ln-. The regeneration rate of Fe2 Ln- initial concentration 0.02mol/L can reach more than 60%. After two-stage regeneration, the regeneration rate is more than 90%, and the second stage regeneration rate is 71%, which is 10% higher than that of the first stage. Compared with traditional aeration regeneration, overweight machine regeneration can effectively alleviate the degradation of complexing agent. The regeneration technology can effectively improve the regeneration efficiency, alleviate the degradation of the complexing agent, reduce the volume of the equipment, and have a bright future.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ028.2

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