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Method for measuring content of acid gas in polyethylene glycol dimethyl ether absorption solution

A technology of polyethylene glycol dimethyl ether and acid gas, which is applied in chemical method analysis, measuring equipment, preparation of test samples, etc., to achieve the effect of optimizing system operation

Inactive Publication Date: 2010-12-22
YANKUANG LUNAN CHEM FERTILIZER PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, NHD desulfurization and decarburization or methanol washing and other physical absorption methods are used to absorb H at home and abroad. 2 S, CO 2 In industrial devices such as gases, in actual production, how much the solution absorbs a certain substance, or the condition of the solute in a certain situation has not been able to be accurately calibrated by analytical means

Method used

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  • Method for measuring content of acid gas in polyethylene glycol dimethyl ether absorption solution
  • Method for measuring content of acid gas in polyethylene glycol dimethyl ether absorption solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Qualitative and quantitative analysis of rich liquid rich in hydrogen sulfide

[0044] (1) measuring the total volume of the Erlenmeyer flask 2 is 430ml, measuring the total gas volume 40ml in the condenser tube 4, and measuring the total volume of the joint rubber tube 10ml;

[0045] (2) Connect nitrogen gas from the gas inlet for replacement, and then seal the gas collecting bottle 5 to the zero mark with sealing liquid.

[0046] (3) Close the cock at the bottom of the condensation pipe 4, and feed cooling water.

[0047] (4) Introduce 250ml of absorption liquid into the production device. (here the solution is a rich solution)

[0048] (5) Heating by the water bath heating device 1, opening the three-way connection of the gas collecting bottle 5 to collect the gas. The heating temperature is controlled slightly lower than the boiling point temperature of the solution by a thermometer 3.

[0049] (6) When the heating temperature reaches about the boiling...

Embodiment 2

[0059] Example 2 Qualitative and quantitative analysis of lean liquid containing less hydrogen sulfide

[0060] (1) measuring the total volume of the Erlenmeyer flask 2 is 430ml, measuring the total gas volume 40ml in the condenser tube 4, and measuring the total volume of the joint rubber tube 10ml;

[0061] (2) Connect nitrogen gas from the gas inlet for replacement, and then seal the gas collecting bottle 5 to the zero mark with sealing liquid.

[0062] (3) Close the cock at the bottom of the condensation pipe 4, and feed cooling water.

[0063] (4) Introduce 250ml of absorption liquid into the production device. (The solution here is a poor solution)

[0064] (5) Heating by the water bath heating device 1, opening the three-way connection of the gas collecting bottle 5 to collect the gas. The heating temperature is controlled slightly lower than the boiling point temperature of the solution by a thermometer 3.

[0065] (6) When the heating temperature reaches about the...

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Abstract

The invention discloses a method for measuring the content of acid gas in polyethylene glycol dimethyl ether absorption solution. The method comprises the following steps of: heating the polyethylene glycol dimethyl ether absorption solution which is led out from a production system, cooling a great deal of mixture of water steam and flash steam which is generated due to heating after entering a color shape condenser, condensing the steam, recycling the dried gas through a gas-collecting bottle, later demarcating the volume amount thereof, and implementing chromatographic analysis and quantitative analysis of H2S to the dried gas for simultaneously measuring the substance compositions such as COS and the like which are difficult to be titrated out in the solution. By the analysis, the absorption condition and saturation of the solution in the production system are determined.

Description

technical field [0001] The invention relates to a method for measuring acid gas content in polyethylene glycol dimethyl ether absorption liquid. Background technique [0002] NHD solvent is an organic solvent, its chemical name is polyethylene glycol dimethyl ether, which is a mixture of polyethylene glycol dimethyl ether. At present, NHD desulfurization and decarburization or methanol washing and other physical absorption methods are used to absorb H at home and abroad. 2 S, CO 2 In industrial devices such as gases, in actual production, how much the solution absorbs a certain substance, or the condition of the solute in a certain situation has not been able to be accurately calibrated by analytical means. Contents of the invention [0003] Aiming at this situation, the present invention has invented a method for measuring acid gas content in polyethylene glycol dimethyl ether (NHD) absorption liquid. The method uses heating and steam stripping to remove hydrogen sulfi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N21/78G01N31/00
Inventor 叶盛芳梁雪梅周清金俊杰张伟黄成敏
Owner YANKUANG LUNAN CHEM FERTILIZER PLANT
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