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A rapid detection method for bitumen penetration

A detection method and penetration technology, which is applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of long detection time and difficulty in meeting the real-time requirements of asphalt penetration, and achieve repeatability Good results

Active Publication Date: 2017-03-08
南京富岛信息工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many influencing factors in the determination process of this method, such as standard needle weight, penetration time and test operation methods, etc., which have a great impact on the determination of asphalt penetration. In addition, the detection time is longer, It is difficult to meet the real-time requirements for bitumen penetration analysis during processing

Method used

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  • A rapid detection method for bitumen penetration
  • A rapid detection method for bitumen penetration
  • A rapid detection method for bitumen penetration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The specific implementation process is as follows:

[0038] 1) Collect a sample of asphalt to be tested, and scan it with a near-infrared spectrometer to obtain a spectrogram of the asphalt to be tested, as shown in figure 2 shown. The abscissa is the spectral wavenumber, ranging from 4000cm -1 to 4800cm -1 ; The vertical axis is the absorbance.

[0039]2) Compare the near-infrared spectra of the above-mentioned asphalt to be tested with the spectral data in the database one by one, and calculate the spectral distance between the two. The spectral distance calculation process is as follows:

[0040] According to the ability of the characteristic wavenumber to reflect the difference in asphalt penetration, the absorbance with a characteristic wavenumber in the range of 4000-4500 is selected to participate in the calculation of the spectral distance. The characteristic wavenumber interval is 25, and the total number of characteristic wavenumbers is 21. Taking the asp...

Embodiment 2

[0078] 1) Collect an asphalt sample numbered 2. Scanned by the near-infrared spectrometer, the asphalt spectrum to be tested is obtained, such as image 3 shown. The abscissa is the spectral wavenumber, ranging from 4000cm -1 to 4800cm -1 ; The vertical axis is the absorbance.

[0079] 2) Compare the spectrum of the bitumen to be tested with the spectral data in the near-infrared spectral database one by one, and calculate the spectral distance between the two (the calculation process is the same as step 2 in Example 1). By calculation, only 5 sample points (less than 5% of the total number of samples in the spectral library) and the spectral threshold of the asphalt sample to be tested are less than 5 can be found in the spectral library. As shown in Table 5:

[0080] Table 5 Spectral library sample points whose spectral distance from the asphalt sample to be tested is less than the threshold

[0081] bitumen sample number spectral distance bitumen sample ...

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Abstract

The invention discloses a method for quickly detecting asphalt penetration. The method is based on a near infrared spectral database of asphalt, a near infrared technology is combined with a topology technology, and quick detection of the asphalt penetration is achieved. The method comprises the following steps: firstly, scanning a plurality of asphalt samples by adopting a near infrared spectrometer to obtain near infrared spectrums of asphalt; obtaining sample spectrum data; building a near infrared spectral database of the asphalt; scanning a to-be-tested asphalt sample by adopting the near infrared spectrometer to obtain a spectral vector; calculating the distances between the to-be-tested spectrum and the sample spectrums in the database; looking up the asphalt penetration data of which the spectrum distance to the to-be-tested spectrum is smaller than a threshold in a spectral library; calculating the penetration of the to-be-tested asphalt. The method is used for quickly determining the asphalt penetration on the basis of the near infrared detection technology and the topology modeling technology, meanwhile, the sample points in the spectral library can be increased by processing the existing samples in the asphalt spectral library, and the detection adaptability is improved.

Description

technical field [0001] The invention relates to the detection technology of asphalt penetration in the field of petrochemical industry, in particular to the rapid evaluation technology of asphalt penetration. Background technique [0002] In the process of petroleum refining, the normal operation of the decompression device is an important link. After the light oil is pulled out, the straight-run bitumen or residual oil flows out from the decompression tower. JTG F40-2004 "Technical Specifications for Highway Asphalt Pavement Construction" revised by the Ministry of Communications uses the penetration index as a new index to reflect the quality of asphalt. Therefore, whether the penetration analysis is accurate will directly affect the classification of asphalt. influences. Currently, GB / T4509-2010 "Asphalt Penetration Determination Method" is widely used in the detection of asphalt penetration, which is represented by the depth that a standard needle penetrates vertically ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/359
Inventor 叶彦斐张向荣吴沪宁梅斌
Owner 南京富岛信息工程有限公司
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