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A method for determining the content of volatile organic compounds in industrial waste gas

A technology for volatile organic compounds and industrial waste gas, applied in the field of detection, can solve the problems of complex treatment process, high collection cost, long time consumption, etc., and achieve the effects of high sensitivity, high degree of operation automation, and continuity.

Active Publication Date: 2018-12-28
HUIZHOU CHANGRUNFA PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sample pretreatment process is complex and requires gas collection, enrichment, concentration and other processes. The collection cost is high and time-consuming. At the same time, the sample will cause loss during the processing process.

Method used

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  • A method for determining the content of volatile organic compounds in industrial waste gas
  • A method for determining the content of volatile organic compounds in industrial waste gas
  • A method for determining the content of volatile organic compounds in industrial waste gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In the measurement method of this embodiment: after hanging with cotton thread in the waste gas atmosphere of the waste water pool in the workshop to balance for 1 h, 10 μL of methanol was added quickly, and the headspace bottle was immediately sealed. 10 min, the results of the determination are shown in Table 4.

[0054] Table 4 The detection results of volatile organic compounds in the waste gas of the workshop wastewater pool

[0055] Volatile Organic Compounds

[0056] Note: N.D. means that the target compound was not detected

Embodiment 2

[0058] In the measurement method of this embodiment: the headspace bottle is placed in a sealed bag of about 20L and the air in the bag is emptied, the sealed bag is placed at the mouth of the pipe or the diversion port of the pipe, and the waste gas in the positive pressure pipe is used to enter Seal the bag, replace the gas in the sealed bag 3 times, and then quickly seal the sealed bag by hand, let the headspace bottle equilibrate for 30 minutes, quickly add 10 μL methanol, and seal the headspace bottle immediately. The headspace equilibrium temperature for samples and standard samples was 80°C for 10 min, and the results of the measurements are shown in Table 5.

[0059] Table 5 Test results of volatile organic compounds in the exhaust gas discharge pipe

[0060]

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Abstract

According to the present invention, based on the disadvantages of time consuming, high cost and the like of the existing waste gas collection and analysis methods, the real-time monitoring of the components and the contents of industrial waste gas volatile organic matters is achieved through rapid industrial waste gas sampling analysis, and a simple, fast and accurate volatile organic matter detection method is established; and the sample pretreatment process of the determination method is simple, the automation degree of the whole operation is high, the continuous determination can be achieved, the sensitivity of the determination is high, and the method and the scientific basis are provided for the detection of the current industrial waste gas volatile solvent content detection.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a method for measuring the content of volatile organic compounds in industrial waste gas. Background technique [0002] Volatile organic compounds (volatile organic compounds, referred to as VOCs) generally refer to compounds with a boiling point ranging from 50°C to 250°C. According to the definition of the World Health Organization, volatile organic compounds refer to saturated vapor pressures exceeding 133.32Pa at 25°C. A class of volatile organic compounds that exist in the air in the form of vapor at room temperature. [0003] The main sources of volatile organic compounds include industrial waste gas, vehicle exhaust, household fuel and incomplete combustion of tobacco leaves, and interior building decoration materials. Among them, the industrial waste gas produced in the production process of chemical factories is the main source of volatile organic pollutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 吴金梅李晓雷戴超
Owner HUIZHOU CHANGRUNFA PAINT