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Distillation method and detection method of organic components in flue gas desulfurization solution

A technology for desulfurization solution and flue gas, which is applied in the field of detection of organic components in flue gas desulfurization solution and distillation of organic components in flue gas desulfurization solution, which can solve interference, shorten service life of expensive components such as chromatographic columns, and difficulty in maintaining equipment Problems such as rising operating costs and other issues, to ensure authenticity and reliability, and to avoid oxidation damage

Active Publication Date: 2015-09-16
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the removal of sulfur dioxide in industrial flue gas, not only the desulfurization solution contains a large amount of sulfuric acid, sulfurous acid, and hydrochloric acid, showing a strong acidity of about PH=5; but also a large amount of sulfate, sulfite, chloride, and Inorganic anions such as nitrate and fluoride, various metal cations such as iron, copper, nickel, chromium, aluminum, zinc, and solid particles such as dust have caused serious interference to the detection and analysis of organic amine components, resulting in the detection of organic components. The accuracy of the results is seriously reduced, and the organic analysis and detection instruments such as GC-MS or LC-MS are seriously contaminated, the service life of expensive components such as chromatographic columns is greatly shortened, and the maintenance difficulty and operating cost of instruments and equipment increase.

Method used

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  • Distillation method and detection method of organic components in flue gas desulfurization solution
  • Distillation method and detection method of organic components in flue gas desulfurization solution
  • Distillation method and detection method of organic components in flue gas desulfurization solution

Examples

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Effect test

example 1

[0034] Detection and analysis of "desulfurization rich liquid".

[0035] Measure 20mL of "desulfurization rich solution" (i.e. sample No. 1) in a distillation flask, distill at 300°C and collect fractions; when the remaining desulfurization solution in the evaporation container is half of the original volume (i.e. Collect the fractions and transfer them to other containers for storage; add sodium hydroxide to the remaining desulfurization solution in the evaporation vessel and dissolve completely, adjust the pH of the solution to 12 and then distill and collect the fractions at 300°C; until the solution is completely evaporated to dryness and no longer produces thick white smoke , use the previously transferred fraction to rinse back into the evaporation container along the wall, shake vigorously to rinse, soak, wash, and dissolve the evaporated solid residue in the evaporation container, distill and combine the collected fractions at 300 ° C; until Only dry inorganic solid ma...

example 2

[0038] Detection and analysis of "desulfurization poor solution".

[0039] Measure 100mL of "desulfurization poor solution" (i.e. sample No. 2) and distill at 350°C; transfer the collected fraction when the remaining desulfurization solution in the container is one-third of the original volume (i.e. about 30mL); add potassium hydroxide to adjust The pH of the remaining solution is 14 and it is distilled completely at 350°C. First use half of the transferred fraction (ie about 30mL) to wash the residue, then distill and combine the collected fractions at 350°C until the solution is completely evaporated to dryness, and then use the transferred fraction again. The last remaining half (ie about 30 mL) of the fractions was washed with solid residues and distilled at 350°C and combined to collect fractions until the solution was completely evaporated to dryness. In addition, the chromatographic parameters were set: the injection volume was 2 microliters, and the split ratio was 1:4...

example 3

[0041] Detection and analysis of "desulfurization poor solution".

[0042] Measure 50mL of "desulfurization poor solution" (that is, sample No. 3), set the distillation temperature at 320°C, transfer the distillate when the remaining solution is about 20mL, and add sodium hydroxide to control the pH of the solution to 13. In addition, the chromatographic parameter settings: the injection volume is 2.5 microliters, the split ratio is 1:30; in addition, the desulfurization solution is distilled and separated according to the same method as in Example 1 and the fractions are detected by GC-MS.

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Abstract

The invention provides a distillation method and a detection method for organic components in a flue gas desulfurization liquid. The distillation method comprises the following steps: measuring a desulfurization liquid and carrying out primary high-temperature distillation; collecting a first fraction; adjusting the residual desulfurization liquid to be strongly alkaline; carry out secondary high-temperature distillation until all parts are dried by distillation and no concentrated white fog is generated, so as to obtain a second fraction; immersing and washing residues obtained by the secondary high-temperature distillation through using the first fraction; and carrying out tertiary high-temperature distillation until a liquid in the container is dried by the distillation and no water steam and concentrated white fog are generated, so as to obtain a third fraction. The detection method adopts at least one of a gas chromatography-mass spectrometry, a gas chromatographic method, a liquid chromatographic method and a liquid chromatography-mass spectrometry to directly determine the sum of the second fraction and the third fraction; and the content of the organic components in the flue gas desulfurization liquid is calculated. The distillation method and the detection method have the advantages of high precision, high accuracy, wide applicability, low pollution and loss to an instrument, low cost and the like.

Description

technical field [0001] The invention relates to a detection and analysis method for organic components in flue gas desulfurization solution, in particular to a method for distilling organic components in flue gas desulfurization solution and a method for detecting organic components in flue gas desulfurization solution. Background technique [0002] In order to control and solve the problem of sulfur dioxide pollution, my country has initially developed a flue gas desulfurization solution prepared by one or more organic amine compounds, water and other antioxidants, which is used for cyclic absorption, removal and recovery A new desulfurization technology for sulfur dioxide in various industrial flue gases such as metallurgical sintering. This desulfurization technology can also be called a renewable flue gas desulfurization process. In the flue gas desulfurization production process, it is necessary to monitor and analyze the flue gas desulfurization solution at any time, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/00G01N30/12G01N30/02
Inventor 成勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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