On-line continuous detection device for free silica dust concentration based on Raman spectroscopy

Abstract

An on-line continuous detection device for free silica dust concentration based on Raman spectroscopy, the base rotates with the rotating cylinder; the filter paper taking system includes a paper picker; the paper picker is connected to the left side of the rotating cylinder; the filter plate passes through Supported by a vertical support frame, the filter paper clip is installed on the filter plate; one end of the hose is connected to the air pump, and the other end is set under the filter plate; the filter paper recovery box is located under the filter plate; the free silica dust collection system is connected On the front side of the rotating cylinder, it consists of a cyclone-type particle size cutting head, a sampling head, an airflow pipeline, a shrinking nozzle and an isolation cover, and the flowmeter is connected to the airflow pipeline; the Raman spectroscopy system includes a The vertical chute on the side, the screw motor at the top, the screw at the bottom, the slider set outside the screw and the Raman spectrometer on the right side of the rotating cylinder; the Raman spectrometer is connected to the Slider connection. The device has a simple structure and can continuously and conveniently perform detection operations.

Description

Technical field [0001] The present invention belongs to the field of dust ingredient detection, and is specifically a free silica dust concentration based on Raman spectroscopy online continuous detecting device. Background technique [0002] With the rapid development of industrialization and economy, the amount of dust generated during production, processing, etc. during operation site is increasing, which contains a large number of free silica dust, which will be inhaled by the operator. Severe damage, even cause systemic diseases. In order to ensure the safety of the operator, it is necessary to perform real-time detection of free silica dust concentration in the workplace, so that it is necessary to quickly determine whether it is necessary to stop the job or take the necessary dust control measures. [0003] At present, the technique of detecting dust from the silica in dust is mainly there to be pyrophosphate mass, X-ray diffraction method, infrared spectrophotometry, etc....

AI Technical Summary

Problems solved by technology

Among them, the pyrophosphoric acid mass method requires a large amount of samples, cumbersome operations, and the corrosive reagents and high-temperature environment used in the experiment may threaten human health; although, at this stage, X-ray diffraction is often used as a standard measurement method, However, although X-ray diffraction is a non-destructive analysis method, it is easily affected by mutual element interference and superimposed peaks, and the cost is high; infrared spectrophotometry has a wide range of applications, but it has low sensitivity and many operating steps, and the measurement results are easily affected by other methods. Ingredient influence

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