Force process detection and raw material analysis using near-infrared spectroscopy drive the develop

2024-01-08

A spectrometer is a scientific instrument that can decompose complex light into spectral lines. Spectrometers are widely used in environmental testing, food testing, drug testing, semiconductor industry, agriculture, and other fields because they can detect which elements are contained in items by capturing and analyzing light information.

There are many types of spectrometers, in addition to atomic absorption spectroscopy, fluorescence spectroscopy, photoelectric direct reading spectroscopy, visible spectrophotometer and other spectra used in visible light wavelength, there are also infrared spectroscopy, ultraviolet spectroscopy, and so on. As an effective analytical method, near-infrared spectroscopy has been recognized and favored as early as the last century due to its advantages of fast, efficient, accurate results, convenient use, no sample damage, no consumption of chemical reagents, and no environmental pollution. With the advancement of optical technology, electronic technology, computer, software and other technologies, the performance of near-infrared spectrometers has also improved, and the technology is becoming more mature. Its application fields are also constantly expanding, and it has shown advantages in on-site analysis, online quality monitoring, and other aspects.

The combination of near-infrared spectroscopy technology and pulp and paper industry is a successful application of near-infrared spectrometer. In today's era, we have high requirements for the quality of any object, and paper is no exception. Unlike traditional methods of improving paper quality by providing high-quality fiber materials and improving pulp and paper making processes, near-infrared spectroscopy provides a reliable process analysis technology for the pulp and paper industry, which can effectively monitor various processes of the paper making process to ensure the final quality of paper.

Defective jade cannot be polished into flawless jade, and it is also difficult to produce high-quality paper using inferior papermaking materials. The selection of high-quality and suitable raw materials is crucial for the papermaking industry as papermaking raw materials have a decisive impact on the quality of finished products. So, how do we choose good materials? This requires classification, analysis, prediction, and evaluation of raw materials. The traditional evaluation and analysis method uses chemical analysis to determine the extract, cellulose, and hemicellulose in the material and classify them, but this method is time-consuming and cannot meet the rapid classification and evaluation requirements in the pulping process. The characteristics of the near-infrared spectrometer, which is easy to operate, fast and efficient, and can be used for on-site detection, have given it a place in the pulp and paper industry. At present, near-infrared spectroscopy is an important equipment for determining the properties of raw materials in the papermaking industry. It can be used for qualitative and structural analysis of cellulose, hemicellulose, and lignin, and for determining the composition of mixed fibers.

In addition, near-infrared spectroscopy can also be used to detect the moisture content in the paper industry and paper coatings, measure the Kappa value of mixed wood pulp and impurities in the pulp, determine the residual ink and paper aging degree of deinked pulp, monitor the resin layer of the paper industry, estimate the hardness of the pulp, measure the porosity and coating amount of the coating, and determine dust points in sulfate pulp. In summary, near-infrared spectroscopy technology, as an important means of identifying the characteristics of raw materials, pulp, and paper, has a wide range of applications in the pulp and paper industry, with promising prospects.

At present, the application of near-infrared spectroscopy technology in the pulp and paper industry is relatively mature, but benefiting from the rise of big data, artificial intelligence and other technologies, near-infrared spectroscopy is also rapidly developing towards intelligence. In view of this, we have reason to believe that near-infrared spectroscopy will also show new brilliance in the paper industry, adding assistance to the long-term development of China's paper industry.

Source: Yizhong Baidu Baike Ai Academic

(Original title: Assisting Process Detection and Raw Material Analysis with Near Infrared Spectroscopy to Promote the Development of the Paper Industry)

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