【作者】 朱菊华；

【导师】 童志权；

【作者基本信息】 湘潭大学 ， 环境工程， 2004， 硕士

【摘要】 本论文针对湿式氧化法处理H2S废气存在的问题,提出并研究吸收剂组成简单、不存在有机物降解、工艺简单、操作条件温和、易用空气氧化再生、可反复多次循环使用的高效脱除H2S废气的新方法——Fe2(SO4)3溶液吸收法和铜—铁体系吸收法。脱硫过程无需高温高压、除消耗空气外,无需消耗任何化工原料,不产生任何有害物质,不造成二次污染,H2S中的硫以元素硫回收。投资和运行费用低,易于工业化。本文的第一部分,采用筛板吸收瓶作吸收器,以Fe2(SO4)3和FeSO4的混合溶液作吸收剂,考察了各单因素对脱硫率的影响,确定了硫酸铁体系适宜的反应条件,并对实验数据进行综合分析。在实验室有限条件下,脱硫率大于92%。在工业装置中,采取增加吸收塔的塔板数,增大液气比和气液湍动程度等到措施,可望将脱硫率提高到98%以上。脱硫过程不存在类似EDTA螯合铁吸收法中吸收剂的降解问题和FeCl3体系脱硫过程中HCl的挥发问题。第二部分,新开发了一种能用于脱除H2S废气的纯无机吸收体系—“铜—铁吸收体系”。该体系由两种常见的无机盐组成,其特点是在一般条件下脱硫效率几乎都高达100%(相当于常规湿法加干法二级脱硫的效果),处理气体浓度范围大(浓度从10-6～10-2)。第三部分,设计出简单、合理的中试流程,可实现吸收—再生连续循环操作。更多还原

【Abstract】 This thesis provides new methods of getting rid of H2S efficiently——Fe2(SO4)3 solutions and Cu-Fe system——with the characteristics of simple compound of solvents, no decomposition of organic compounds, simple techniques and common operation conditions. The solvents can be easily regenerated by air, and can be recycled for reuse. In the desulfurization process, there are no needs of high temperature and high pressure, any chemical materials but air, and there are no harmful byproducts created. And there is no re-pollution. The sulfur in H2S can be recycled in the form of sulfur element. So the cost of investment and operation is low, and it can be easily industrialized.In part one of this thesis, we looked into the efficiency of getting rid of H2S via conditional experiments, identified the reacting conditions in iron solutions, and gave some analysis of the data. The desuphurization efficiency can be improved to more than 98 per cent in industrial devices by more tower shutters, increasing the ratio of liquid to gas, and more stirring. There are no problems of solvents decomposition existing in chelate iron system, and no problem of volatilization of HCl existing in FeCl3 system.In part two, a new kind of inorganic absorbing system——“Cu-Fe system” is contrived. That system is composed of two common inorganic salts, which has extremely high desulfurization efficiency of almost 100 per cent, and its desulfurization range is large (in the range of one ppm to 10,000 ppm).In part three, a simple and rational technical process is provided. And the process of absorption-regeneration can be realized by one single device.更多还原