Asphalt multiple harmful gas indoor detection device and detection method

A harmful gas and detection device technology, applied in the direction of measuring devices, test sample preparation, instruments, etc., can solve the problems of poor stability of asphalt fume gas output, inability to accurately control asphalt fume, poor operational stability, etc. , to achieve the effect of good air tightness, uniform change and reduced dosage

Inactive Publication Date: 2020-06-26
TONGJI UNIV
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Problems solved by technology

However, it has the following deficiencies: first, the use of an open asphalt fume collection environment cannot accurately control the generation of asphalt fume, which makes the output stability of asphalt fume gas poor; secondly, the use of compression bottles to control the output of asphalt fume gas The output rate and operational stability are poor, and at the same time, it is greatly affected by external environmental factors

Method used

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  • Asphalt multiple harmful gas indoor detection device and detection method
  • Asphalt multiple harmful gas indoor detection device and detection method

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Embodiment

[0040] Such as figure 1, indoor detection device for various harmful gases of asphalt, including three-way valve 1 at the gas outlet; 2 gas pressure valves for steel cylinders; 3 pure air steel cylinders; 4 cooling boxes; 5 spiral condenser tubes; 6 electric stirrers; Flask air inlet 8; oil bath handle 9; three-necked flask 10; oil bath 11; heater 12; connecting wire 13; stirring controller 14; temperature controller 15; detection airtight box 16; 17; electric fan 18; air inlet three-way valve 19. The oil bath 11 provides heating and heat preservation medium; the heater 12 provides the source of heat energy, and the spiral condensing tube 5 increases the heat exchange contact area; the pump-suction gas analyzer 17 records and detects the emission of asphalt harmful gases in real time.

[0041] The three-way valve 1 at the air outlet is installed on the air duct on the left side of the three-necked flask 10, and is connected to the pure air cylinder 3 and the cooling box 4 thr...

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Abstract

The invention relates to an asphalt multiple harmful gas indoor detection device and detection method; the asphalt multiple harmful gas indoor detection device comprises a three-neck flask, a heatingunit, a stirrer and a detection unit; the detection unit comprises a detection closed box and a pumping type gas analyzer arranged in the detection closed box; the three-neck flask is respectively provided with a gas inlet, a gas outlet and a middle opening, and a stirring shaft of the stirrer is arranged in the three-neck flask through the middle opening; the gas outlet is connected with an exhaust pipe, the gas inlet is connected with an air inlet pipe, the exhaust pipe and the gas inlet pipe are both led into the detection closed box to form an internal circulation system or a controllableopen system; during testing, asphalt harmful gas flows, and the pumping type gas analyzer performs real-time detection. The device provided by the invention is not influenced by external environmentalfactors, can meet various test requirements, and solves the problem of numerical instability of generation and detection of asphalt harmful gas.

Description

technical field [0001] The invention relates to the field of detection of road engineering materials, in particular to an indoor detection device and detection method for various harmful gases of asphalt. Background technique [0002] Asphalt pavement occupies a major part of the road traffic network. During the production and construction of asphalt mixture, various harmful gases are released (harmful gases include, but are not limited to: sulfur dioxide (SO 2 ), nitric oxide (NO), nitrogen dioxide (NO 2 ), hydrogen sulfide (H 2 S), carbon monoxide (CO), volatile organic compounds (VOC), etc.), not only pollute the surrounding environment, but also pose a huge hidden danger to the health of production and construction personnel. Harmful asphalt gas is a mixed fume containing a large amount of polycyclic aromatic hydrocarbons and a small amount of heterocyclic mixtures of sulfur, nitrogen and oxygen emitted during the production of asphalt and asphalt products. It usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N1/38G01N1/44
CPCG01N1/38G01N1/44G01N33/0036
Inventor 叶奋王泽宋卿卿胡诗园方烁谢毓敏肖梅强
Owner TONGJI UNIV
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