GC-4285 Fully Automatic Special Gas Chromatograph for Coal Mines

The GC-4285 Fully Automatic Special Gas Chromatograph for Coal Mines is the most critical core part of the special tube bundle automatic monitoring system for coal mines. The GC-4285 special chromatograph for coal mines features dual column ovens with independent temperature control, three columns in parallel for simultaneous injection, and structural characteristics of special chromatographic columns and interchangeable multiple detectors. It can also be connected to an autosampler linked with underground gas sampling tube bundles. Through microcomputer control and data processing workstation, it realizes automatic cyclic sampling of samples, pre-cutting, detection, automatic alarm for gas content exceeding limits, and report printing. It realizes real-time monitoring and automatic analysis of gases during the coal seam oxidation and spontaneous combustion process, improves the accuracy of early prediction and forecasting of spontaneous combustion, measures the changes in gas component concentrations in sealed fire areas, and discriminates the degree of extinction of sealed fire areas.

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

2. Operating system: Operating system developed based on Linux, Android and HarmonyOS, more convenient to operate.

3. Rapid cooling system: Special cooling channels are designed with a rear door system to ensure rapid cooling.

4. Fully automatic gas path control system: Equipped with high-precision electronic flow control devices to realize fully automatic flow control.

5. Automatic fault diagnosis system: Locates and diagnoses fault points and provides prompts.

6. Mobile APP remote control system: Remote control and operation can be realized.

7. Fully automatic online analysis: Uninterrupted cyclic sampling and analysis of (1~32) points can be realized, achieving unattended operation.

8. Dual column oven analysis system: Independent high and low temperature control is adopted to achieve high stability.

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

10. Short-time rapid analysis: Analysis of fire gas components including CO, CO₂, N₂, O₂, CH₄, C₂H₄, C₂H₆, C₂H₂, C₃H₈, C₃H₆, iC4H10 and nC4H10 is completed within (4~10) min with a single injection.