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Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction

A technology for asphalt flue gas and polycyclic aromatic hydrocarbons, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of collection reliability and other problems, and achieve the effect of simple and accurate flue gas collection, easy implementation, and saving manpower and material resources.

Inactive Publication Date: 2017-05-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at how to simulate the release and collection of flue gas during asphalt construction, and then solve the problem of reliability of on-site sampling and collection of asphalt fume, and the accurate qualitative and quantitative detection of polycyclic aromatic hydrocarbons in asphalt fume, the purpose of the present invention is to provide a Simple, qualitative and quantitative accurate detection method and device for polycyclic aromatic hydrocarbons in asphalt smoke from asphalt pavement construction

Method used

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  • Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction
  • Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction
  • Method and device for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction

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Experimental program
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Effect test

Embodiment 1

[0027] An asphalt fume collection device for simulating the collection of asphalt fume discharged during asphalt pavement construction, including a flue gas generating pipe 2, a flue gas collecting pipe 6, a tube furnace 5, a sample container 9, and a gas cylinder 1 passing through the pipe Connect the gas inlet of the rotameter 3, the gas outlet of the rotameter 3 is connected to the inlet of the flue gas generating pipe 2 through a pipe, the flue gas generating pipe 2 is connected to the flue gas collecting pipe 6 through threads, and the outlet of the flue gas collecting pipe 6 is connected to the wet type pipe through a pipe. The gas inlet of the flow meter 8 is connected, and the gas outlet of the wet flow meter 8 is connected with the vacuum pump 7 through a pipeline; The gas in the gas cylinder 1 is air, and the sample container 9 is a porcelain boat.

[0028] Put 20g of XAD-2 resin into the flue gas collecting pipe 6, connect the flue gas collecting pipe 6 with the flu...

Embodiment 2

[0033] The flue gas generating pipe 2 and the flue gas collecting pipe 6 are connected by flanges; the sample container 9 is a porcelain boat; the flue gas collecting pipe 6 is filled with XAD-2 resin for absorbing flue gas.

[0034] Put 30g of adsorption resin into the flue gas collecting pipe 6, connect the flue gas collecting pipe 6 with the flue gas generating pipe 2, and then insert the flue gas generating pipe 2 into the cavity of the tube furnace 5.

[0035] Weigh 10 g of the coal tar pitch sample, put it into the sample container 9, and push it into the central position of the flue gas generating pipe 2.

[0036]The rotameter 3 controls the flow rate of nitrogen gas passing into the flue gas generating pipe 2 to be 1000 l / h, and the gas flow rate in the flue gas generating pipe 2 is 0.486 m / s at this time. Use the temperature controller 4 to control the tube furnace 5 to heat up to 130°C. When the temperature of the tube furnace 5 was raised to 130°C, the temperature ...

Embodiment 3

[0039] The sample container 9 is a quartz glass dish; the smoke collecting pipe 6 is equipped with PUF resin for absorbing smoke.

[0040] Put 25g of adsorption resin into the flue gas collecting pipe 6, connect the flue gas collecting pipe 6 with the flue gas generating pipe 2, and then insert the flue gas generating pipe 2 into the cavity of the tube furnace 5.

[0041] Weigh 10 g of mixed asphalt (coal tar pitch: petroleum pitch mass ratio = 2:8) sample, put it into the sample container 9, and push it into the central position of the flue gas generating pipe 2.

[0042] The flow rate of air flowing into the flue gas generating pipe 2 is controlled by the rotameter 3 to be 360 ​​l / h, and the gas flow velocity in the flue gas generating pipe 2 is 0.162 m / s at this time. Use the temperature controller 4 to control the tube furnace 5 to heat up to 160°C. When the temperature of the tube furnace 5 was raised to 160°C, the temperature was kept constant for 2 hours, and then the ...

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Abstract

A method for detecting polycyclic aromatic hydrocarbons in pitch fume in pitch pavement construction comprises the steps of placing adsorption resin in a smoke collecting pipe according to the requirement that 2-5 g of adsorption resin is needed for each gram of pitch sample, weighing the pitch sample, placing the pitch sample in a sample container, and pushing the sample container into the central position of a smoke generating pipe; leading gas in a gas cylinder into the smoke generating pipe, controlling the flow velocity in the smoke generating pipe to be 0.05-0.5 m / s, rising the temperature of a tube furnace to the pitch pavement construction temperature of 100-180 DEG C; after constant temperature for 2-5 h, using a solvent to extract the adsorption resin sample where smoke is adsorbed, performing concentration, and performing gas chromatography-mass spectrum online (GC / MS) detection. The method has the advantages of being simple, convenient, practical and accurate in qualification and quantification.

Description

technical field [0001] The invention relates to a method for detecting polycyclic aromatic hydrocarbons in flue gas, in particular to a method and a device for detecting polycyclic aromatic hydrocarbons in asphalt flue gas in asphalt pavement construction. Background technique [0002] The asphalt pavement construction process includes steps such as asphalt mixture mixing, paving, and compaction. During this period, the smoke generated will continue to be released to the environment. The smoke contains inhalable particles, polycyclic aromatic hydrocarbons and other pollutants. Especially in recent years, road construction has advanced by leaps and bounds, and the mileage of traffic has increased rapidly. Therefore, asphalt pavement construction has become a non-negligible source of harmful gas and dust particle pollution, among which polycyclic aromatic hydrocarbons are the most harmful type of pollutants, especially the 16 priority control polycyclic aromatic hydrocarbons s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06
CPCG01N30/06
Inventor 王磊赵亮富郭少青冯硕
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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