GC-808 Mining Gas Chromatograph Application Scope:
Coalbed methane, mine gas, goaf gas, sealed area gas
Instrument Introduction: The GC-808 Mining Gas Chromatograph is used for underground mine gas analysis, fire prediction, and gas explosion risk assessment. This includes analysis for detection, prediction, and unsealing indicators of extinguishment levels. Utilizing a thermal conductivity detector, dual hydrogen flame detector, methane conversion furnace, 12-port valve sampling device, and stainless steel packed columns, a single injection completes the analysis of both macro and micro components of mine gas (O?, N?, CH?, CO, CO?, C?H?, C?H?, C?H?). Compliance Standards: AQ/T1019-2006 Chromatographic Analysis and Indicator Methods for Spontaneous Combustion Indicator Gases in Coal Seams; AQ/T1008-2007 Mine Rescue Regulations
GC-808 Mining Gas Chromatograph Performance Features: Based on the new-generation, highly stable GC-7890 gas chromatograph, it operates reliably and stably. Microcomputer automatically controls three 12-port valves for sampling, equipped with a backflush device. Utilizes three pre-columns and three stainless steel packed columns, effectively preventing column cross-contamination and ensuring long-term uninterrupted operation of the entire system. Employs a three-detector process: thermal conductivity detector, hydrogen flame detector, and an added conversion furnace. Automatically adjusts the sensitivity of the hydrogen flame detector based on methane concentration to avoid masking trace components behind high methane levels. Fast analysis speed: Within 4-8 minutes, a single injection completes the analysis of mine gas macro components (O?, N?, CH?, CO, CO?, C?H?, C?H?, C?H?). Within 10 minutes, a single injection completes full-component gas analysis and explosion risk assessment (triangle method). The GC-808 Mining Gas Chromatograph is equipped with 4/8-liter aluminum cylinders of multi-component standard mixed gas. Includes a 4-channel chromatographic workstation for mine gas analysis. Alarm values can be set for various gas concentrations and alkene ratios, with automatic alerts for methane and oxygen concentrations entering the gas triangle. Results from both automatic and manual sampling can be stored in a database. Historical data or trend graphs can be printed (or queried) by time or sampling location in the database, displaying the distance from the gas triangle to historical data. Enables online automatic analysis; through pipeline installation, the instrument can periodically sample automatically, continuously monitoring process sample gas with automatic calibration, eliminating manual verification. For areas not covered by pipeline probes, manual sampling and detection can be employed, offering flexibility and reliability.
Instrument Technical Indicators:
1. Hydrogen Flame Ionization Detector (FID):
Cylindrical collector electrode design, quartz nozzle, responsive
Detection Limit: ≤8×10?12 g/s (n-hexadecane)
Baseline Noise: ≤2×10?13 A
Baseline Drift: ≤2×10?12 A/30min
Linearity: ≥10?
2. Thermal Conductivity Detector (TCD):
Semi-diffusive structure
Constant current control power supply
Sensitivity: ≥3000 mV·ml/mg, High Sensitivity ≥8000 mV·ml/mg
Baseline Noise: ≤10 μV
Baseline Drift: ≤100 μV/30min
Linearity: ≥10?
3. Large Screen LCD Display:
Clearly displays set values, actual values, and protection values for each temperature zone
Real-time instrument status display
Touch keyboard, menu-driven operation
4. Temperature Control Indicators:
Column Oven: Ambient +5°C to 399°C, Accuracy ±0.1°C
Injector: Ambient +5°C to 399°C, Accuracy ±0.1°C
Detector: Ambient +5°C to 399°C, Accuracy ±0.1°C
Conversion Furnace: Ambient +5°C to 399°C, Accuracy ±0.1°C
5. Minimum Detection Concentration: CO≤0.5 ppm, O?, N?≤0.1%, CO?≤1 ppm
CH?, C?H?, C?H?, C?H?≤0.1 ppm
6. Qualitative Repeatability RSD≤1%

Zhengzhou Aidi ProductionGC-808 Mining Gas ChromatographSupplies Coal Drill Cuttings Desorption Instrument, Deep Hole Sampling Device, Pressure Tester, Geological Exploration Desorption Instrument, Borehole Flow Meter, Mine Extraction and Outburst Prevention Equipment, True Density Tester for Coal, Gas Content Tester, Automatic Initial Gas Emission Velocity Tester, Diffusion Velocity Tester, Gas Parameter Instrument for Coal Extraction Pipelines