论文部分内容阅读
至今为止,测量烟囱二氧化硫排放量的常用方法有两种:一是气体色谱法,该法选择性很强,反应时间慢,约为40秒,测量可靠性小;二是具有二个波长的紫外吸收光谱仪,反应时间较快,约20秒;但选择性弱。法国拉赛尔公司制造了一种特种二氧化硫分析仪SIMS,又称选择性调制干涉光谱仪,它可测量温度高达200℃的烟尘,反应时间为3秒,测量范围从1ppm～几百ppm,灵敏度为1ppm。此二氧化硫分析仪结构简单。它使用一只低压碘化灯,其工作波长靠干涉滤光镜选择,在280～300毫微米之间。在干涉滤光镜和碘化灯之间,有一个长度为10厘米的不锈钢气管,在气管的两端,装有透明的紫外石英窗。为了切断光线,此二氧化
So far, there are two common methods for measuring sulfur dioxide emissions from chimneys: one is gas chromatography, which has a high selectivity and a slow reaction time of about 40 seconds, which has low measurement reliability. The other is UV with two wavelengths Absorption spectrometer, the reaction time, about 20 seconds; but the selectivity is weak. France Raschel company created a special sulfur dioxide analyzer SIMS, also known as selective modulation interference spectrometer, which measures up to 200 ℃ soot temperature, the reaction time is 3 seconds, the measurement range from 1ppm ~ several hundred ppm, the sensitivity is 1ppm. This sulfur dioxide analyzer has a simple structure. It uses a low-pressure iodide lamp, its working wavelength by interference filter selection, at 280 ~ 300 nm. Between the interference filter and the iodide lamp there is a 10 cm stainless steel gas tube with transparent UV quartz windows at both ends of the gas tube. In order to cut off the light, this dioxide