有机硫恶臭气体的优化分离技术研究

发布时间：2018-10-16 15:39

【摘要】：恶臭气体是大气环境中的一类主要污染物,这些气体带有刺鼻的气味,损害了人们赖以生存的生活环境,严重的甚至影响到人的身体健康。我国的恶臭污染物排放标准GB14554-93规定了八种恶臭污染物,分别为氨、硫化氢、甲硫醇、甲硫醚、三甲胺、苯乙烯、二甲二硫和二硫化碳。本文针对其中的四种硫系化合物甲硫醇、甲硫醚、二甲二硫和二硫化碳的混合气体进行分离检测,设计快速升温装置,实现色谱柱升温的小型化,并利用声表面波器件检测分离气体。本文基于气相色谱法的基本原理,使用GC-7980气相色谱仪对四种气体混合组分测试分离,探索最佳分离条件。本文选择使用了TM-5毛细管柱,PEG-20M毛细管柱,TM-PLOT U毛细管柱,MXT#174;-1301金属柱,Rt-Silica BOND PLOT毛细管柱五种不同固定相类型的分离柱,针对不同色谱柱,选用不同的柱前压力和升温方式对混合物分离检测,得到最佳分离条件。选用25m长的Rt-Silica BOND PLOT毛细管色谱柱实现了混合组分的快速分离效果,分离时间6.283min,组分之间的最小分离度2.675。为了实现色谱柱升温的小型化,本文设计一种直径98mm,高48mm,厚1mm的铝金属圆环加热支架,缠绕铠装加热丝,使用温度控制模块有效代替了传统色谱仪中柱温箱的升温功能,成功在6.88min内分离出甲硫醇、甲硫醚、二甲二硫和二硫化碳混合气体。缩小了色谱柱柱温箱所占的体积,减小了功耗,为发展便携式设备提供了保障。本文利用声表面波器件代替色谱仪中检测器FPD对色谱柱分离出的气体检测,成功的检测出液体进样的甲硫醚、二硫化碳、二甲二硫三种组分,响应在均在1000Hz以上,但是未能检测到甲硫醇气体。本文对便携式气相色谱装置进行了集成,以色谱仪的进样装置,柱温箱,载气,色谱柱,声表面波传感器作为检测气体的主要部件,为发展便携式气相色谱检测系统进行了有益的探索。
[Abstract]:Stench gas is one of the main pollutants in the atmospheric environment. These gases have a pungent smell, which damage the living environment on which people depend, and even affect the health of human body seriously. The emission standard GB14554-93 of odor pollutants in China stipulates eight kinds of odorous pollutants, namely ammonia, hydrogen sulfide, methyl mercaptan, methyl sulfide, trimethylamine, styrene, dimethyl disulfide and carbon disulfide. In this paper, four sulfur compounds, methyl mercaptan, methyl sulfide, dimethyl disulfide and carbon disulfide are separated and detected, and a rapid heating device is designed to realize the miniaturization of chromatographic column heating. The surface acoustic wave device is used to detect the separated gas. In this paper, based on the basic principle of gas chromatography, GC-7980 gas chromatograph was used to test the separation of four gas mixtures and to explore the best separation conditions. In this paper, TM-5 capillary column, PEG-20M capillary column, TM-PLOT U capillary column, MXT#174;-1301 metal column and Rt-Silica BOND PLOT capillary column were selected for the separation of five different stationary phases. The optimum separation conditions were obtained by using different pre-column pressure and heating methods to detect the mixture. A 25m long Rt-Silica BOND PLOT capillary column was used to realize the rapid separation of the mixed components. The separation time was 6.283 min and the minimum separation degree between the components was 2.675. In order to realize the miniaturization of chromatographic column heating, a kind of aluminum metal ring heating support with diameter of 98 mm, height of 48 mm and thick 1mm was designed, which was wound with armored heating wire. The temperature control module was used to effectively replace the heating function of the column temperature box in traditional chromatograph. The mixture of methyl mercaptan, methyl sulfide, dimethyl disulfide and carbon disulfide was successfully separated from 6.88min. The volume of column temperature box is reduced and the power consumption is reduced, which provides a guarantee for the development of portable equipment. In this paper, using saw device instead of detector FPD in chromatograph to detect the gas separated by chromatographic column, three components of liquid injection methyl sulfide, carbon disulfide and dimethyl disulfide have been successfully detected. The response is above 1000Hz. However, no methionol gas was detected. In this paper, a portable gas chromatographic device is integrated. The main components of gas detection are the injection device of chromatograph, column temperature box, carrier gas, chromatographic column and saw sensor. It is useful to develop portable gas chromatographic detection system.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X512;X831

【共引文献】