论文部分内容阅读
为实现在线监测硫铁化合物氧化时生成的二氧化硫,利用三氧化二铁、氢氧化铁及四氧化三铁与硫化氢反应制备硫铁化合物,在线监测了硫铁化合物的氧化升温和氧化尾气中二氧化硫的质量浓度。根据试验结果,推测并验证了装置中残余的硫化氢气体及吸附在硫化反应产物中的硫化氢气体对二氧化硫的监测有严重干扰。为消除硫化氢干扰,在氧化反应前用饱和湿度的高纯氮气对试验装置进行吹扫。结果表明,吹扫时间至少为10 min,才可以驱除试样中的硫化氢气体,从而避免对二氧化硫的监测产生干扰。同时,硫铁化合物的氧化升温与二氧化硫的生成及生成量密切相关,可以用二氧化硫来判断设备内硫铁化合物是否具有危险性,从而为硫铁化合物的自燃提出更早更全面的判据。
In order to realize on-line monitoring of sulfur dioxide generated when the iron-sulfur compound is oxidized, the iron-sulfur compound is prepared by the reaction of ferric oxide, iron hydroxide and ferroferric oxide with hydrogen sulfide. The oxidation and sulfur dioxide oxidation of sulfur- Mass concentration. According to the test results, it is presumed and verified that the residual hydrogen sulfide gas in the device and the hydrogen sulfide gas adsorbed in the sulfurized reaction product seriously interfere with the monitoring of sulfur dioxide. To eliminate interference with hydrogen sulphide, purge the test equipment with high purity nitrogen at a saturated humidity before the oxidation reaction. The results show that the purge time of at least 10 minutes before they can get rid of the sample of hydrogen sulfide gas in order to avoid monitoring of sulfur dioxide interference. At the same time, the oxidation of sulfur compounds is closely related to the formation and formation of sulfur dioxide. It is possible to judge whether the sulfur compounds in the equipment are dangerous by using sulfur dioxide, so as to provide earlier and more comprehensive criteria for the spontaneous combustion of sulfur compounds.