A sampling device for online collection of near-infrared spectra of pulverized coal

Abstract

A sampling device for online collection of near-infrared spectra of pulverized coal, including a housing box, a sample processing unit assembled in the housing box, and a system control unit. It overcomes the need for related equipment to collect the near-infrared spectrum of solid powder. The shortcomings of the spectrum are easily affected by related factors such as material density, temperature and surface flatness. The technical points are: the sampling tube in the sample processing unit is equipped with a pressure sensor, and the pulverized coal sample preparation device is equipped with a temperature sensor, sapphire Window, near-infrared standard reference plate; the system control unit automatically adjusts the temperature of pulverized coal by controlling the volume of cold air, and controls the pressure difference in the compressed air and pulverized coal pipelines to automatically adjust the density of pulverized coal; in addition , this device also has the function of automatically grabbing out-of-bounds samples. Compared with similar products, it not only has a reasonable structural design, but also can significantly improve the repeatability and stability of collecting near-infrared spectra, thereby ensuring the accuracy of online near-infrared coal quality detection.

Description

technical field [0001] The invention relates to a sampling and sample preparation device for collecting near-infrared spectra of pulverized coal on a production line, in particular to a sampling device with automatic control of pulverized coal sampling density, temperature, and surface smoothness, with automatic correction and automatic grabbing of model boundaries. The online sampling and sample preparation device with functions such as samples can also be used for online collection of near-infrared spectra or other spectra of powders such as flour, milk powder, and animal feed. Background technique [0002] Near-infrared spectrum is an absorption spectrum produced by frequency doubling and combination frequency, and its wavelength is defined in the range of 780nm to 2500nm. Because this technology has many advantages such as fast measurement speed, high test efficiency, low analysis cost, no need to damage samples, clean and pollution-free, it has been used in agricultural...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a sampling and sample preparation device for collecting near-infrared spectra of pulverized coal on the production line, which overcomes the existing related equipment that is easily affected by material density, temperature, and surface smoothness when collecting near-infrared spectra of powders. Compared with similar products, it not only has a reasonable structural design, but also can significantly improve the repeatability and stability of the collected near-infrared spectrum, thereby ensuring the accuracy of online detection of near-infrared coal quality

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