Detection method for quickly measuring components of coarse coal gas and related device

A rapid measurement and detection method technology, applied in the direction of measuring devices, test sample preparation, material separation, etc., can solve the problems of unmeasured correction factors, expensive equipment costs, cumbersome operations, etc. Inexpensive and sensitivity-enhancing effect

Active Publication Date: 2016-11-23
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology solves two technical issues with analyzing gases like CO2 (carbon monoxide), CH4(methanol). One issue being addressed involves achieving consistently high levels of specific analyte while minimizing interference caused by other compounds that are commonly found together or interact during processing steps. Another concern includes ensuring precise measurements without requiring frequent recalibration of standards gas. Additionally, it provides an efficient way to measure mixtures containing different components simultaneously through simplified methods involving multiple columns filled with small particles called sieve materials.

Problems solved by technology

This patented describes two methods: one uses gaschromatography (GC) or chemistry techniques to determine specific components such as hydrogen sulfate ion(HSO4), nitrogen oxides (NO2), ammonia, etc., while another involves combining GC/chemistry technology into an instrument called CARBON DIMETERS®. These instruments are costly and require trained staffs who can perform complex calculations over different concentrations.

Method used

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  • Detection method for quickly measuring components of coarse coal gas and related device
  • Detection method for quickly measuring components of coarse coal gas and related device
  • Detection method for quickly measuring components of coarse coal gas and related device

Examples

Experimental program
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Embodiment 1

[0048] Such as figure 1 As shown, a device used in a detection method that adopts a rapid determination of crude gas components in this embodiment includes a crude gas purification device 1, an automatic sampling valve 4 with a quantitative loop 5, an argon source 14, 5A ( 13X) Molecular sieve packed column 6a, modified alumina packed column 6b, carbon molecular sieve packed column 6c, reference chromatographic column 6d, methane conversion furnace 7, thermal conductivity detector 8A, hydrogen flame detector 9B, hydrogen flame detector 9C, Hydrogen source 11, air source 12 and work station 13, the air inlet of described coal gas purification device 1 is connected with the crude gas source to be measured, the gas outlet of gas purification device 1 is connected with the automatic sampling valve 4 that is provided with quantitative loop 5 The gas inlet is connected, the gas outlet of the argon source 14 is connected with the gas inlet of the automatic sampling valve 4 of the ref...

Embodiment 2

[0078] The inner diameter of the 5A (13X) molecular sieve packed column of the device used in the detection method for rapid determination of crude gas components in this embodiment is 2mm; the length is 0.5m; the 5A (13X) molecular sieve mesh number is 40 orders; modified alumina The inner diameter of the packed column is 2mm; the length is 0.5m, and 2mol / L KOH, NaOH or NaCO is used for alumina 3 After soaking in an alkaline solution, activate at 300°C for 5 hours; the inner diameter of the carbon molecular sieve packed column is 2mm; the length is 0.5m; the carbon molecular sieve mesh is 40 mesh; other structures are the same as in Example 1.

[0079] The detection step of the present embodiment is the same as the detection step of embodiment 1, and the concentration of the gas used for detection in the present embodiment is H 2 4.00%, O 2 5.00%, CO 2 1.00%, CO 2.00%, N 2 88.00%, the chromatographic column is a 5A molecular sieve packed column 6a with an inner diamete...

Embodiment 3

[0093] The internal diameter of the 5A (13X) molecular sieve packed column of the device used in the detection method for rapid determination of crude gas components in this embodiment is 4mm; the length is 6.0m; the 5A (13X) molecular sieve mesh number is 100 orders; modified alumina The inner diameter of the packed column is 4mm; the length is 6.0m, and 10mol / L KOH, NaOH or NaCO is used for alumina 3 After soaking in an alkaline solution, activate it at 500°C for 10 hours; the inner diameter of the carbon molecular sieve packed column is 4mm; the length is 6.0m;

[0094] The detection step of the present embodiment is the same as the detection step of embodiment 1, and the concentration of the gas used for detection in the present embodiment is H 2 0.50%, O 2 1.00%, CO 2 1.00%, CO2.00%, N 2 95.50%, the chromatographic column is a 5A molecular sieve packed column 6a with an inner diameter of 3mm and a length of 3m; the 5A molecular sieve has a mesh number of 80; the modifi...

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Abstract

The invention discloses a detection method for quickly measuring components of coarse coal gas and a related device, and mainly solves the problems of nonlinearity of carbon dioxide measurement, high TCD detection limit, high cost of multi-chromatographic column measurement system, long detection duration and the like of the conventional gas chromatographic analysis technology for the coarse coal gas. The device for quickly measuring the components of the coarse coal gas mainly comprises a purifying device, a chromatographic column separation device, a conversion device, a detector and a data processing unit. The purifying device is used for performing dust removal, desulfurization and dehydration on the coarse coal gas; the chromatographic column separation device is used for separating all the gas components; the conversion device is used for converting carbon dioxide and carbon monoxide; the detector and the data processing unit are used for realizing qualification and quantification. According to the detection method for quickly measuring the components of the coarse coal gas, multi-chromatogram combined calculation is carried out by taking methane as a bridge, so that the contents of all the components can be obtained by one step. The detection method and the device have the advantages of low equipment cost, short detection period, high measurement precision and wide application range.

Description

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Claims

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Application Information

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Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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