Microfluidic underground coal mine air monitoring system and method
A technology of air monitoring and microfluidic control, which is applied in the direction of analyzing materials and instruments, and can solve problems such as the lack of air monitoring systems and methods in coal mines
Inactive Publication Date: 2014-06-18
XIAN UNIV OF SCI & TECH
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However, the underground environment of coal mines is special. Due to the need to monitor the gas composition and dust concentration in the air at the same time, the above-mentioned chips cannot be directly introduced into coal mines for air monitoring.
In the prior art, there is no coal mine underground air monitoring system and method based on microfluidic technology
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[0082] Such as figure 1 with figure 2As shown, the microfluidic coal mine underground air monitoring system described in the present invention includes a microfluidic chip 1, a sampling unit 2, a detection unit 3 and a main control unit 4, and the microfluidic chip 1 is provided with an air inlet 1-1, exhaust hole 1-2, dust exhaust hole 1-3, high-speed gas inlet 1-4, liquid inlet 1-5 and vacuum port 1-6, the microfluidic chip 1 is provided with a gas-solid Two-phase separation mechanism 1-7, dust dispersion selection mechanism 1-8 and a plurality of gas analysis microchannels, the air inlet of the gas-solid two-phase separation mechanism 1-7 passes through the gas transmission conduit 1-17 and is arranged on the transmission The first microvalve 1-10 on the air duct 1-17 is connected to the air inlet 1-1, and the dust outlet of the gas-solid two-phase separation mechanism 1-7 is arranged on the dust conveying duct 1-18 and The fifth microvalve 1-11 on the dust delivery cond...
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The invention discloses a microfluidic underground coal mine air monitoring system and method. The system comprises a microfluidic chip, a sampling unit, a detecting unit and a main control unit, wherein a gas-solid two-phase separating mechanism and a dust dispersity selecting mechanism are arranged in the microfluidic chip; the sampling unit comprises a miniature liquid pump, a miniature gas pump and a miniature gas sampling vacuum pump; the detecting unit comprises a microprocessor module, a miniature light emitting element, a monochromator, a light detector, a signal conditioning circuit module and a photoelectric counter; and the main control unit comprises a main controller module and a wireless communication module. The method comprises the following steps of: 1. vacuumizing; 2. sampling gases; 3. analyzing micro-channels of the gases and treating characteristic spectrum absorptive amount of the gases; 4. treating the number of dust particles within various particle diameter sections; 5. treating the concentrations of the gases, the dust concentration and the dust dispersity; and 6. cleaning. By adoption of the system and the method, the detection cost is lowered, the detection efficiency is improved, relatively accurate detection data can be obtained, and the generalization and application values are high.
Description
technical field [0001] The invention relates to the technical field of coal mine underground air monitoring, in particular to a microfluidic coal mine underground air monitoring system and method. Background technique [0002] The coal industry is one of the important energy industries in my country. In 2011, the national coal output reached about 3.52 billion tons, accounting for about 77.8% of the country's total energy production. At present, my country's underground coal mines are all gas mines, and disasters such as gas and coal dust explosions, coal and gas outbursts have brought enormous pressure to the safe production of coal. Therefore, the State Administration of Work Safety and the State Bureau of Coal Mine Safety Supervision have formulated strict "Coal Mine Safety Regulations". [0003] In order to ensure normal underground production, the "Coal Mine Safety Regulations" stipulates the various gas content and dust concentration in the air of the underground work...
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IPC IPC(8): G01N35/00
Inventor 闫小乐郝丽梅赵省贵张涛解忧
Owner XIAN UNIV OF SCI & TECH