Concentration and particle size measurement system of dust particles of coal mine

Abstract

The invention discloses a concentration and particle size measurement system of dust particles of a coal mine. The measurement system comprises a sample collection system, an optical system, a humidity control system and a temperature and pressure control test system. According to the measurement system, the concentration and the particle size of the dust particles can be measured simultaneously within a wider range, and fast and real-time measurement can be realized; the measurement system is well integrated with a computer, so that the higher degree of automation of a measurement device is achieved; meanwhile, the response time of a photoelectric element is short, so that the response sensitivity of the measurement system is improved, and the measurement system also has the characteristics of being simple and convenient in operation, high in measurement accuracy and safe and reliable in use. Through combination with sample collection and atomizing humidification, the humidity of a to-be-measured sample is controlled, so that the support is provided for studying distribution laws of the concentration and the particle size of dust under different humidity conditions.

Description

technical field [0001] The invention relates to the technical field of dust particle measurement, in particular to a coal mine dust particle concentration and particle size measurement system. At the same time, it can also be applied to the concentration and particle size measurement of metal mine rock dust, tunnel rock dust and air pollution. Background technique [0002] Coal mine dust refers to rock dust and coal dust, which is one of the five major disasters in coal mines. It is produced in the coal mining process and other processes such as transportation. The modern mining technology with the characteristics of high yield, high efficiency and low consumption has a large increase in dust production compared with traditional mining methods. Studies have shown that without dust prevention measures, the dust concentration of blast mining face can reach 300-500mg / m 3 , the dust concentration of the machine mining face can reach 1000-3000mg / m 3 , the dust concentration of ...

AI Technical Summary

Problems solved by technology

[0003] In China, manual timing and fixed-point detection methods are usually used. The data measured by this method only reflect the dust conditions during the dust measurement period, and cannot comprehensively and accurately reflect the real-time and multi-space overall dust conditions in coal mines.

At present, in terms of dust concentration and particle size measurement, the main measurement methods are filter membrane method, micro vibration balance method, ray absorption method and blackness method, etc. However, these methods have their own defects.

For example, the filter membrane method requires manual operation to trap particles on a high-performance filter membrane, which is complicated to operate, and there are many factors affecting the accuracy of the experiment; the micro vibration balance method is greatly affected by temperature and air humidity; the measurement accuracy of the blackness method Vulnerable to operator vision, judgment and environmental factors

Existing measurement devices and methods have disadvantages such as low reliability, slow measurement speed, and complicated operation, and it is difficult to simultaneously measure concentration and particle size in a wide range of working conditions

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