發(fā)布時(shí)間：2018-09-09 10:34

【摘要】：在焦?fàn)t煤氣和城市煤氣中均含有一定量的萘,萘的存在易造成煤氣管道和設(shè)備的阻塞,同時(shí)造成大氣污染,所以煤氣的脫萘是非常必要的。目前,煤氣中萘的吸收工藝仍不夠完善,缺乏理論研究數(shù)據(jù),導(dǎo)致煤氣中萘的吸收率較低。因此本論文對(duì)萘體系的相平衡數(shù)據(jù)的測(cè)定、萘吸收模型的建立等方面進(jìn)行了研究。本文首先利用氣相頂空色譜法,對(duì)不同的溶劑(0#輕質(zhì)柴油、焦油L1和焦油L2)和萘的體系進(jìn)行相平衡研究,分別測(cè)定了不同溫度下萘的亨利常數(shù),回歸了亨利常數(shù)與溫度的關(guān)系式。其次利用Aspen Plus軟件建立了萘的吸收工藝模型,并分別以輕質(zhì)柴油和焦油L1為吸收劑對(duì)萘的吸收工藝進(jìn)行模擬計(jì)算。工藝過(guò)程中,根據(jù)工業(yè)煤氣中萘含量數(shù)據(jù),設(shè)定氣相中萘的摩爾分?jǐn)?shù)為0.002,在保證吸收率不低于95%條件下分別對(duì)兩種吸收劑的進(jìn)料量進(jìn)行了模擬計(jì)算。采用理論板數(shù)為10的填料吸收塔對(duì)萘的吸收進(jìn)行小試實(shí)驗(yàn)。實(shí)驗(yàn)過(guò)程中設(shè)定塔溫為40℃,壓力為101.325kpa,氣體進(jìn)料量0.53m3/h,氣相中萘濃度約為10g/m3(摩爾分?jǐn)?shù)0.002),分別考察了不同吸收劑(輕質(zhì)柴油或焦油L1)及其進(jìn)料量對(duì)吸收率的影響,并與模擬結(jié)果進(jìn)行驗(yàn)證。實(shí)驗(yàn)值與模擬值偏差較小,進(jìn)一步驗(yàn)證了工藝模型的可行性。
[Abstract]:There is a certain amount of naphthalene in coke oven gas and city gas. The existence of naphthalene can easily cause obstruction of gas pipeline and equipment and cause air pollution, so it is very necessary to remove naphthalene from gas. At present, the absorption technology of naphthalene in gas is still not perfect, and the theoretical research data are lacking, which leads to the low absorption rate of naphthalene in gas. Therefore, the determination of phase equilibrium data of naphthalene system and the establishment of naphthalene absorption model were studied in this paper. In this paper, the phase equilibrium of different solvents (0# light diesel oil, tar L 1 and tar L 2) and naphthalene were studied by gas headspace chromatography, and the Henry constants of naphthalene were determined at different temperatures. The relation between Henry's constant and temperature is regressed. Secondly, the absorption process model of naphthalene was established by using Aspen Plus software, and the absorption process of naphthalene was simulated by using light diesel oil and tar L1 as absorbent respectively. In the process, according to the data of naphthalene content in industrial gas, the molar fraction of naphthalene in gas phase was set to be 0.002. Under the condition that the absorptivity was not less than 95%, the feed amount of two absorbents was simulated and calculated separately. The experimental results of naphthalene absorption were carried out in a packed absorber with theoretical plate number of 10. In the experiment, the tower temperature is 40 鈩，

本文編號(hào)：2232135