Movable analysis system of reducing sulfides in atmosphere

Abstract

The invention provides a movable analysis system of reducing sulfides in the atmosphere. The movable analysis system of reducing sulfides in the atmosphere is utilized for on-site monitoring of hydrogen sulfide, carbonyl sulfide and methyl mercaptan in the atmosphere. The movable analysis system of reducing sulfides in the atmosphere mainly comprises an electric refrigerator, a quartz-lining silcosteel and a portable gas chromatograph. The electric refrigerator is a refrigeration source. A temperature is controlled in a range of -150 to -180 DEG C so that the enrichment of oxygen or nitrogen is avoided. The movable analysis system of reducing sulfides in the atmosphere is characterized in that at a low temperature, hydrogen sulfide, carbonyl sulfide and methyl mercaptan in about 1L of a gas sample are enriched in the quartz-lining silcosteel; the quartz-lining silcosteel is connected to the portable gas chromatograph by an eight-way valve; a normal-temperature resolution process is carried out; and a concentrated component obtained by enrichment is fed into the portable gas chromatograph and is subjected to analysis and determination. Compared with the prior art, the movable analysis system of reducing sulfides in the atmosphere has the advantages of simple operation, fast analysis rate and high accuracy.

Description

technical field [0001] The invention relates to a movable analysis system for reducing sulfur compounds in the atmosphere, in particular to a complete analysis system for on-site real-time monitoring of hydrogen sulfide, carbonyl sulfide and methyl mercaptan in the atmosphere. Background technique [0002] Due to global climate change and ambient air pollution, volatile sulfides have attracted more and more attention, and their sources include natural (volcanic eruption, microbial release) and man-made (emissions from production processes such as coal, petroleum fuel, and metallurgy industries). Reducing sulfides such as hydrogen sulfide, methyl mercaptan, methyl sulfide, carbon disulfide, and carbonyl sulfide in the atmosphere form acidic sulfur aerosols after oxidation, which endangers human health. At the same time, aerosols interfere with sunlight and affect the earth's radiation balance, causing global climate change. [0003] Low odor threshold of volatile sulfur comp...

AI Technical Summary

Problems solved by technology

my country promulgated "Gas Chromatography for the Determination of Hydrogen Sulfide, Methyl Mercaptan, Methyl Sulfide and Dimethyl Disulfide in Air Quality" (GB / T14678-93) in 1993. The method stipulates that the analysis of sulfide in ambient air adopts low temperature adsorption In this method, the gas samples collected on site are transported back to the laboratory, under the low temperature condition of liquid oxygen (-186°C) as the refrigerant, the sulfide in the 1L gas sample is condensed in the concentrator tube, and then the concentrator tube is heated to At 70°C, the desorbed sulfides are introduced into the gas chromatograph for analysis and detection. This technology uses liquid oxygen refrigeration, which is less safe, and cannot be used for on-site continuous and online monitoring, and cannot meet the instantaneous and sudden needs of environmental odor monitoring.

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