Pre-treatment method for liquid desulfurizer solution of flue gas, and detection method thereof

A detection method and technology for desulfurizers, which are applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of separation and extraction of desulfurizers, inability to use, and increase of interference factors, so as to avoid harm, reduce impact, and shorten the detection period. Effect

Active Publication Date: 2012-02-22
PANZHIHUA IRON AND STEEL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the physical and chemical properties of liquid desulfurizers for sintering flue gas make it impossible to use the above-mentioned common organic analysis liquid desulfurizer pretreatment methods, because the solubility of liquid desulfurizers in water or ethanol is much greater than that in other polar or non-polar organic compounds. The solubility in the solvent, and ethanol is miscible with water, so there is no suitable solvent to separate and extract the desulfurization agent from the aqueous solution
At the same time, since the boiling point of the desulfurized organic components is much higher than that of water, it is impossible to efficiently distill the desulfurized organic components to be recovered to achieve the purpose of concentration and purification. If only the water is evaporated, the desulfurized organic components to be measured Left in the residual solution, although concentration and enrichment are achieved, the corresponding interference factors are also multiplied
Therefore, simple distillation techniques cannot fully meet the needs of detection

Method used

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  • Pre-treatment method for liquid desulfurizer solution of flue gas, and detection method thereof
  • Pre-treatment method for liquid desulfurizer solution of flue gas, and detection method thereof
  • Pre-treatment method for liquid desulfurizer solution of flue gas, and detection method thereof

Examples

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Effect test

example 1

[0027] Pretreatment of Acidic Precipitation Liquid Desulfurizer Solution

[0028] Measure 250mL of acidic precipitation into a 500mL beaker, place it on a hot plate and heat it to boil directly at high temperature, quickly evaporate a large amount of water to remove water, and concentrate to a solution volume of about 5mL. While hot, add concentrated ammonia water dropwise to adjust the pH value to 9.5, continue to boil for 4 minutes, adjust the volume to 10 mL with water, and dry filter to prepare a liquid desulfurizer detection solution for acidic precipitation.

[0029]Detecting Organic Components of Desulfurizer in Liquid Desulfurizer Solution by GC-MS

[0030] The organic components of the desulfurizer in the prepared acidic precipitation liquid desulfurizer solution were determined by GC-MS. The GC-MS measurement procedure was carried out in a conventional manner. Among them, chromatographic parameters: injection volume (15 microliters); injection port temperature (300...

example 2

[0033] Measure 350mL of flue gas condensed water, concentrate to a volume of about 8mL, adjust pH=8.5, continue to boil for 5 minutes, dilute to 15mL with water, and centrifuge to separate insoluble solids. Besides, the liquid desulfurizer solution was prepared in the same manner as in Example 1 and detected by GC-MS.

[0034] figure 2 The upper curve in the figure shows the analysis results of pretreatment and detection of "flue gas condensate" according to Example 2; figure 2 The lower curve in the figure shows the analysis results without pretreatment of the "flue gas condensate", but with direct detection.

example 3

[0036] Measure 450mL of washing water, concentrate to a volume of about 5mL, adjust the pH to 7.5, continue to boil for 3 minutes, dilute the water to 10mL, and dry filter to separate the solid substance. Besides, the liquid desulfurizer solution was prepared in the same manner as in Example 1 and detected by GC-MS.

[0037] image 3 The upper curve in the figure shows the analysis results of pretreatment and detection of "wash water" according to Example 3; image 3 The lower curve in the figure shows the results of the analysis where the "wash water" was not pretreated, but was directly detected.

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Abstract

The present invention discloses a pre-treatment method for a liquid desulfurizer solution of flue gas. The pre-treatment method comprises the following steps: heating and boiling the liquid desulfurizer solution of the flue gas, carrying out rapid evaporation to remove moisture in the liquid desulfurizer solution of the flue gas; under the boiling state, adopting ammonia water to adjust the pH value of the concentrated liquid desulfurizer solution of the flue gas to 7.5-9.5; continuously heating, boiling and volatilizing to remove the excess ammonia water to obtain the liquid desulfurizer solution of the flue gas, wherein the liquid desulfurizer solution is provided for the detection. At least the one selected from a gas chromatography-mass spectrometry combination method, a gas chromatography, a liquid chromatography, a liquid chromatography-mass spectrometry combination method is adopted to detect the pre-treated liquid desulfurizer solution of the flue gas.

Description

technical field [0001] The invention relates to a pretreatment method and a detection method of a flue gas liquid desulfurizer solution. More specifically, the present invention relates to a method for concentrating a solution containing the liquid flue gas desulfurizing agent and detecting the composition and content of the liquid flue gas desulfurizing agent solution during the desulfurization process using the liquid flue gas desulfurizing agent. Background technique [0002] Flue gas desulfurization is currently the main technical means to control sulfur dioxide pollution in the world. In order to eliminate the shortcomings of flue gas desulfurization technologies such as limestone-gypsum wet method, and avoid the generation of new waste pollutants or carbon dioxide emissions, liquid desulfurizers are used for efficient removal and recovery. The new desulfurization technology of sulfur dioxide in flue gas is becoming a research hotspot. [0003] At present, in the flue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/14
Inventor 成勇黎建明杨平邱正秋吴建国王建山袁金红邹维嘉胡金荣
Owner PANZHIHUA IRON AND STEEL
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