Product application：

The Coal Spontaneous Combustion 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 infrared spectroscopy 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 microphone technology with enhanced 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. 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.

Structure： Dust filter, single tube, bundle tube, shunt box, extraction pump, gas sampling control cabinet, monitoring computer, microphone spectrum multi-gas analyzer, thermal conductivity multi-gas analyzer, printing output equipment, network card, system software, etc.

Advantages：

l High measurement accuracy.

l Low detection limit.

l High-efficiency measurement.

l Easier maintenance as major components are located on the surface.

l Easy to operate.

l Low cost.

Features：

l More than 300 gases can be measured, such as CO, CO2, CH4, C2H4, C2H6, C2H2, H2O, H2S, SO2, O2,H2,He, N2, temperature, pressure, etc.

Detection limits of ppb, sub-ppm levels.

l Dust filter, single tube, bundle tube, shunt box, extraction pump, gas sampling control cabinet, monitoring computer, microphone spectrum multi-gas analyzer, thermal conductivity multi-gas analyzer, print output equipment, network card, system software composition.

l Underground gas sampling and analysis system, including mine intrinsically safe substation, power box and supporting equipment.

l Ground data processing and sharing subsystem, including industrial computer, printer, etc.

l Ground analysis workstation: composed of spectrum multi-gas analyzer, thermal conductivity multi-gas analyzer, collecting workstation power supply, etc.

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: Spectroscopy (CO, CO2, CH4, C2H4, C2H6, C2H2, H2O, H2S, SO2, pressure, etc.), Thermal Conductivity (O2,H2,He,N2), Semiconductor (Temperature);

Sampling method: Extraction type, pumping length is not less than 6,000 meters;

Measurement range: CO 0~1% CO2 0~5% CH4 0~1% C2H4 0~1% C2H6 0~1% C2H2 0~1% H2O 0~1% SO2 0~1% O2 0~25% N2 0~80%

Temperature：(-5-100)℃

Pressure：0~1000KPa Detection

Limit： CO 1ppm CO2 5ppm CH4 0.5ppm C2H4 0.5ppm C2H6 0.5ppm C2H2 0.5ppm H2O 100ppm SO2 0.5ppm O2 0.1% N2 0.5%

Temperature and Pressure Resolution： Temperature:0.5℃

Pressure:0.1KPa

Accuracy：±2% measurement value Monitoring bundle tube: 12, 24, 48, 64, customizable

Running time: hour continuous monitoring or manual setting.

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)