Detecting method of ammonia and hydrogen sulfide in wet ammonia-containing acidic gas

A technology containing amino acid and detection method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of analysis system corrosion and blockage, complex analysis process, easy corrosion and blockage of analysis system, etc., to reduce corrosion, analyze Fast, guaranteed long-term stable operation effect

Active Publication Date: 2013-09-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The task of the present invention is to provide a wet detection method for ammonia and hydrogen sulfide in acid-containing gas, which has the advantages of simple and safe operation, fast analysis, accurate and reliable results, and avoids damage to the analysis system when hydrogen sulfide, ammonia and water coexist. Corrosion and clogging, ensuring the normal and stable operation of the system for a long time, etc., to overcome the shortcomings of the existing analysis methods that the analysis system is easy to corrode and clog, and the analysis process is complicated

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  • Detecting method of ammonia and hydrogen sulfide in wet ammonia-containing acidic gas
  • Detecting method of ammonia and hydrogen sulfide in wet ammonia-containing acidic gas
  • Detecting method of ammonia and hydrogen sulfide in wet ammonia-containing acidic gas

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Embodiment 1

[0055] figure 1 It is a schematic diagram of the analysis process of ammonia and hydrogen sulfide in wet acid-containing gas. Calcium carbide and molecular sieves are packed in sections with an inner diameter of 30mm and a length of 180mm in stainless steel tube 5, and the height ratio of the two is 4:1. The gas outlet 8 of the stainless steel tube is connected to the sample inlet of the gas chromatograph 9 through a pipeline, and the gas inlet 4 of the stainless steel tube is connected to a nitrogen bottle filled with a purity of 99.99% through a pipeline, and nitrogen is purged for standby.

[0056] After the sampling gas bag 1 is replaced three times with hydrogen gas, it is filled with hydrogen gas which is about 1 / 3 of the volume of the gas bag, and then the gas sample is diluted with the sampling gas bag filled with hydrogen gas. Connect the sampling gas bag 1 filled with the gas sample to be tested diluted by hydrogen with the gas inlet 4 of the stainless steel tube thr...

Embodiment 2

[0059] Calcium carbide and zeolite are packed in sections into a stainless steel tube 5 with an inner diameter of 25 mm and a length of 250 mm, and the height ratio of the two is 5:1. The gas outlet 8 of the stainless steel tube is connected to the sample inlet of the gas chromatograph 9 through a pipeline, and the gas inlet 4 of the stainless steel tube is connected to a nitrogen bottle filled with a purity of 99.99% through a pipeline, and nitrogen is purged for standby.

[0060] After the sampling gas bag 1 is replaced with hydrogen three times, it is filled with hydrogen gas which is about 1 / 4 of the volume of the gas bag, and then the gas sample is diluted with the sampling gas bag filled with hydrogen gas. Connect the sampling gas bag 1 filled with the gas sample to be tested diluted by hydrogen with the gas inlet 4 of the stainless steel tube through the pipeline, open the valve 3 at the mouth of the sampling gas bag, and the gas sample to be tested diluted by hydrogen e...

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Abstract

The invention provides a detecting method of ammonia and hydrogen sulfide in wet ammonia-containing acidic gas. According to the detection method, hydrogen gas is used for diluting sample gas so that the concentration of ammonia and hydrogen sulfide ingredients in the sample gas is reduced to be lower than the saturated crystallization concentration, the problem of system blockage caused by generated composite ammonium salt solids is solved, simultaneously, because the hydrogen gas for diluting is carrier gas for color spectrum, a peak is not generated in a chromatogram map, the dilutability on the sample gas cannot influence analysis results, and high-content gas can be analyzed. Because the sample gas is subjected to deep dewatering treatment, the analysis system corrosion caused by the hydrogen sulfide ingredients in the sample gas is greatly reduced, and the long-period and stable operation of an instrument is ensured. Macromolecular porous microsphere chromatographic columns are adopted, the ammonia and hydrogen sulfide content in the mixed gas can be further analyzed and completed by a gas chromatograph, the analysis is fast, the results are accurate and reliable, the operation is simple, convenient and safe, and the detecting method can be used for detecting the ammonia and hydrogen sulfide content in ammonia-containing acidic raw gas of a sulfur recovery device in an oil refinery plant and can be used for analyzing relative gas systems of coking plants, nitrogen fertilizer plants and the like.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and relates to gas analysis technology, in particular to an analysis method for ammonia and hydrogen sulfide content in acidic gas containing water vapor in Claus sulfur recovery process in refinery, and can be used in coal coking plants and Analysis of mixed gas containing ammonia and hydrogen sulfide in ammonia plant and analysis of related gas systems. Background technique [0002] When Claus sulfur recovery process technology treats ammonia-containing acid gas, all the acid raw material gas is introduced into the sulfur production furnace for combustion, and the ammonia in the acid gas must be completely burned and decomposed into N in the sulfur production furnace. 2 and H 2 O, if the ammonia combustion is not complete, the residual ammonia will cause the following problems: (1) Ammonia will react with various acidic components in the process gas stream to form solid ammoni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 朱康玲涂怡然杨龙刘百强刘家海张海波
Owner CHINA PETROLEUM & CHEM CORP
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