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A multi-component real-time online remote monitoring device and method for coal spontaneous combustion indicator gas

A technology for spontaneous combustion and remote monitoring of coal, which is used in measurement devices, analytical materials, color/spectral property measurement, etc. It can solve the problems of long time for manual sampling and analysis, poor stability, low sensitivity, etc. The effect of measuring the optical path and ensuring the response sensitivity

Active Publication Date: 2016-09-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-component real-time online remote monitoring device and method for coal spontaneous combustion indicator gas. To solve the problems of long manual sampling and analysis time, low sensitivity and poor stability in the existing beam tube technology

Method used

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  • A multi-component real-time online remote monitoring device and method for coal spontaneous combustion indicator gas
  • A multi-component real-time online remote monitoring device and method for coal spontaneous combustion indicator gas
  • A multi-component real-time online remote monitoring device and method for coal spontaneous combustion indicator gas

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Embodiment Construction

[0032] Such as figure 1 As shown, the overall device structure diagram of the present invention includes a DFB laser 1, a laser controller 2, a detector 3, a filter amplifier 4, a signal generator 5, a lock-in amplifier 6, a signal processing system 7, and long optical path multiple reflections Pool 8, fiber collimator 9, 4*1 fiber coupler 10, armored double-core fiber 11, explosion-proof box 12. in:

[0033] The laser 1 is a tunable semiconductor laser with characteristics such as tunable and narrow linewidth. The components include a DFB laser with a central wavelength of 1567nm for measuring CO gas, which is used for measuring CO 2 DFB laser with central wavelength of 1436nm for gas, used to measure C 2 h 4 DFB laser with central wavelength of 1626nm for gas, and for measuring C 2 h 2 The DFB laser with the center wavelength of the gas is 1538nm. The lasers emitted by the four lasers are coupled and output by the 4*1 fiber coupling beam, and are fused with the input c...

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Abstract

The invention discloses a multi-component real-time online remote monitoring device and a method for coal spontaneous combustion indicator gas. For the limit of long distance optical fiber sensing band, the near-infrared band with weaker gas absorption line strength is used for real-time online monitoring the typical alkane gas as CO, CO2, C2H2 and C2H4 in the indicator gas. The multi-component weak signal is detected through the multi-frequency wavelength modulation and novel long optical distance multiple reflection pool technology; the device comprises a laser, a laser controller, a signal generator, a novel multiple reflection pool, an optical fiber collimator, a light beam coupler, a photoelectric detector, a lock-in amplifier, a processing system collecting the signal of A / D and terminal and an anti-explosion case. The device adopts the optical fiber for connection without manpower sampling, the responding sensitivity is high, the device and the method can monitor a variety of indicator gases at the same time with simple operation, good stability and small power, the device is easy to carry and install for field experimentation and the dynamic measuring range is large.

Description

technical field [0001] The invention relates to the field of optical analysis devices for coal spontaneous combustion index gas, in particular to a multi-component real-time online remote monitoring device and method for coal spontaneous combustion index gas. Background technique [0002] Coal is the main energy source in our country, and coal production plays a pivotal role in our national economy. In my country's coal mines, spontaneous combustion is very serious, and it is one of the major disasters in many coal mines in my country. According to statistics, among the existing coal mines in my country, 54.9% of key state-owned coal mines have the risk of spontaneous fire, and 29.1% of local state-owned coal mines with an annual output of more than 30,000 tons have the risk of spontaneous fire. The number of spontaneous combustion fires in coal mines accounts for more than 90% of the total number of fires. Coal spontaneous combustion fires have brought great harm and econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/39
CPCG01N21/39G01N21/031G01N2021/399
Inventor 夏滑吴边张志荣庞涛孙鹏帅韩荦崔小娟董凤忠
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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