DukeTech-Online Underground Coal Spontaneous Combustion Monitoring System-DKCSF MS-1U

  Overview：

The Coal Spontaneous Combustion Underground Monitoring System of Duketech is used to monitor the gas content of O₂, N₂, H₂, He,CO, CO₂, CH₄, C₂H₄, C₂H₆, C₂H₂,H₂S,SO₂,temperature, pressure, and so on. The regularity of formation of multi-component index gases during spontaneous combustion of coal is detected, which provides technical support and theoretical support for the identification of early hidden danger characteristic information of spontaneous combustion of coal.It can be used as a monitoring system for large-scale coal spontaneous combustion test bench and sample test bench, as well as provides experimental conditions for a multi-direction science such as coal fire prevention and fire science and improves the efficiency of coal mine production.

Principle：

 The system analysis host is based on infraredspectroscopy technology, has pulse infrared light source, and forms 10 spectral bands in mid-infrared region through narrow-band optical filter for gas analysis; ultra-high sensitivity patented optical   beam can be realized through 10 narrow-band optical filters, and ultra-narrow optical filter can remove the interference of background gas; Multi-spectral region can help to minimize the cross sensitivity. It can measure up to 9 kinds of gases at the same time.  technology with enhanced

Multi-point sampler can freely expand gas sampling points from 12 channels to 64 channels. The instrument can be applied to small flow gas sampling and high temperature gas working conditions. Configuration and control are carried out by the application software on Win-PC, and data are automatically stored in Excel format. Standard digital or analog output is realized through different interfaces. At the same time of 64 channels of simultaneous sampling, 64 channels of temperature sensor and pressure sensor can be connected to the multi-point sampling unit to measure the sampling gas temperature, air temperature, surface temperature, working temperature and pressure of the multi-point sampling unit.

Advantages：

l igh measurement accuracy.H

l ow detection limit.L

l igh-efficiency measurement.H

l Short beam radiation distance.

l Analysis rapidly.

l Wide detection range.

l Measure various gas components at the same time.

Features：

Gases：CO₂,He, N₂,H₂, O₂S, SO₂O, H₂, H₂H₂, C₆H₂, C₄H₂, C₄, CH₂ CO,

Functions：

a）The function of using database to analyze the change of gas content in a monitoring point in a period of time;

b）Prediction function of spontaneous combustion fire:by calculating the concentration of each component,alkane-alkene ratio and chain alkenes ratio,timely and accurately reflect the change of fire source temperature;by using triangular rule to discriminate the degree of explosion danger;

C）Historical data query function:system data storage for more than ten years.Provide various data for fire prevention and extinguishing;

d）Automatic control function:It has 24-hour online monitoring function and realizes networking monitoring function.It can install the system on the computer of employees in the enterprise,and has real-time viewing function.The output function of the system is complete:the gas sampling control cabinet can automatically sample 60 sampling points,analyze the gas concentration,store the analysis data by computer,calculate the relevant parameters,and send out spontaneous combustion alarm;

e）The functions of report,curve,storage and printing.It can provide daily,monthly,spectrogram graph and gas content trend reports.

f）The functions of automatic alarm of gas concentration exceeding the setting limit,flow display and automatic adjustment.

g）It has the function of networking,realizes the sharing of analysis data,facilitates the leaders and dispatchers to directly detect the changes of underground gas,and can be monitored by APP on the mobile terminal and accessed by remote web pages.

Technical Data：

Response time:

According to channel integration time(C.I.T.)and gas replacement cycle,typical 10s to several minutes;single gas<10 s;flushing time:nine gases(water vapor)<120s

 Detection Principle:

), Semiconductor (Temperature);  ₂,He,N₂,H₂, pressure, etc.), Thermal Conductivity (O₂S, SO₂O, H₂, H₂H₂, C₆H₂, C₄H₂, C₄, CH₂Spectroscopy (CO, CO

 Sampling method:

xtraction type, pumping length is not less thanE,000 meters; 6

Measurement range:

  0~5%₂CO 0~1% CO

0~1% ₄H₂C 0~1%  ₄CH

0~1% ₂H₂C 0~1% ₆ H₂C

  0~1%₂SO 0~1% O₂H

0~80% ₂N      0~25%₂O

Temperature：(-5-100)℃     

Pressure：0~1000KPa

Detection Limit：

5ppm ₂CO 1ppm    CO

0.5ppm ₄H₂C 0.5ppm  ₄CH

0.5ppm ₂H₂C 0.5ppm ₆H₂C

0.5ppm ₂SO 100ppm O₂H

5%0. ₂N 1%0.  ₂ O

Temperature and Pressure Resolution：

Temperature:0.5℃       Pressure:0.1KPa  

±2% measurement valueAccuracy：

Monitoring bundle tube:

12, 24, 48, 64, customizable

24.hour continuous monitoring or manual settingRunning time:

Standard：

Low Voltage Measurement Directive 2006/95/EC and electro magnetic EMC Directive2004/108/EC EN 50270: 2006, EN 61000-3-2: 2006, EN 61000-3-3: 1995 + A1: 2001 + A2: 2005, EN 61010-1: 2001

：Safety standards

EN61010-1 (2001), IEC 61010-1 (2001), CAN/CSA-C22.2 No. 61010-1 (2004)and UL 61010-1 (2004 incl. rev. 2005)