GC-4285 Automatic Gas Chromatograph for Coal Mines

The GC-4285 automatic gas chromatograph for coal mines is the most critical core component of the automatic beam tube monitoring system specifically designed for coal mines. The GC-4285 coal mine-specific chromatograph features dual column ovens with independent temperature control, three columns connected in parallel for simultaneous sample injection, and interchangeable dedicated chromatographic columns and multiple detectors. It can be connected to the underground gas sampling beam tubes via an autosampler, and through microcomputer control and a data processing workstation, it achieves automatic sequential sampling, pre-cutting, detection, automatic alarm for gas concentration exceeding limits, and report printing. It enables real-time monitoring of automatic gas analysis during the oxidation and spontaneous combustion process of coal seams, improves the accuracy of early prediction and forecasting of spontaneous ignition, determines changes in gas component concentrations within sealed fire zones, and assesses the degree of extinguishment in sealed fire zones.

1. 10.1-inch touch color screen: clear image, durable, fast response, space-saving, and more conducive to communication;

2. Operating system: developed based on Linux, Android, and HarmonyOS, making operation more convenient.

3. Rapid cooling system: a dedicated cooling channel is designed with a rear-door opening system to ensure rapid cooling.

4. Fully automatic gas path control system: equipped with a high-precision electronic flow control device for fully automatic flow control.

5. Automatic fault diagnosis system: locates and diagnoses fault points with prompts.

6. Mobile APP remote control system: enables remote control and operation.

7. Fully automatic online analysis: supports uninterrupted cyclic sampling and analysis at (1–32) points, enabling unattended operation.

8. Dual column oven analysis system: uses independent high- and low-temperature control for high stability.

9. Gas path back-flushing system: prevents contamination of the analytical columns and ensures long-term uninterrupted operation of the entire instrument.

10. Rapid analysis in a short time: completes analysis of fire gases including CO, CO2, N2, O2, CH4, C2H4, C2H6, C2H2, C3H8, C3H6, iC4H10, nC4H10, and other components within (4–10) minutes per injection.