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System for analyzing reducing sulfide in atmosphere

A sulfide, atmospheric technology, applied in the direction of analyzing materials, material separation, measuring devices, etc., can solve the problems of high price and low sensitivity, and achieve the effect of simple operation and fast analysis

Active Publication Date: 2013-07-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such instruments are relatively expensive and have low sensitivity, and can only measure 10 -6 Class samples, not suitable for use in ambient air 10 -9 Determination of grade sulfide

Method used

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  • System for analyzing reducing sulfide in atmosphere
  • System for analyzing reducing sulfide in atmosphere
  • System for analyzing reducing sulfide in atmosphere

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The specific operating method of the reducing sulfide analysis system in the atmosphere of the present invention is as follows:

[0017] 1. Production of sample concentrator tube:

[0018] (1) Passivate a stainless steel tube (about 50cm in length, 3.2mm in outer diameter, 2.2mm in inner diameter, or other appropriate size), soak it in nitric acid with a mass concentration of 40% for 2 hours, rinse it with clean water repeatedly, and blow it dry with nitrogen for later use .

[0019] (2) Make the stainless steel tube U-shaped, such as figure 1 As shown, the U-shaped tube is filled with acid-washed and passivated carriers with a particle size of 60 to 80 meshes, and a small amount of quartz cotton is used to plug both ends of the tube tightly to prevent the filling from slipping out. One end of the tube is a needle with a side hole. The other end is sealed with a silicone rubber gasket. The outside of the stainless steel tube is wrapped with aluminum foil, heating wire...

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Abstract

The invention provides a system for analyzing reducing sulfide in atmosphere, which is used for monitoring the reducing sulfide in atmosphere in real time on the site. The system mainly comprises an electric refrigerator, a concentration tube, a portable gas chromatograph and the like, wherein the electric refrigerator is a refrigerating source, and the temperature is controlled at 150-180 DEG C below zero to avoid the concentration of oxygen or nitrogen; at low temperature, the reducing sulfide in 1-5L of gas sample is concentrated in the concentration tube; the concentration tube after concentration is connected with the portable photoionization gas chromatograph; and the concentration tube is heated by a temperature controller to 70 DEG C, so that all concentrated components flow into the portable gas chromatograph for analytic determination. Compared with the prior art, the invention has the advantages that the system for analyzing the reducing sulfide in atmosphere is simple in operation, quick and accurate in analysis, suitable for site application, and the like.

Description

technical field [0001] The invention relates to an analysis system for reducing sulfides in the atmosphere, in particular to a complete analysis system for on-site real-time monitoring of reducing sulfides 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). The main reductive sulfur compounds in the atmosphere include hydrogen sulfide, methyl mercaptan, methyl sulfide, carbon disulfide and carbonyl sulfide, etc. After oxidation, acidic sulfur aerosols are formed, which endanger human health. At the same time, aerosols interfere with sunlight and affect the earth's radiation balance. cause global climate change. [0003] Low odor threshold of volatile sulfur compounds (10 -9 grade), stro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N1/24
Inventor 韩丛碧李凌波
Owner CHINA PETROLEUM & CHEM CORP