Instrument Introduction:
The SG-2003 mine gas natural fire monitoring system is an integrated engineering solution for continuously obtaining characteristic gas data of underground fires during coal mining.
The project continuously collects and transports gases from multiple coal mining faces underground, which are monitored and controlled by ground monitoring, and automatically sampled and analyzed in a cyclic manner. Through continuous analysis of the characteristic gases of mine fires and trend curves, the possibility of fires and gas explosions is continuously analyzed, and the ignition points are predicted and forecasted, providing scientific basis for the prevention and control of mine gas accidents and natural fires. It is particularly suitable for "dead zones" that are difficult for personnel to enter, such as goaf areas, tunnel ceilings, and enclosed fire zones, providing monitoring methods that are beyond human capabilities. Especially for unsealing fire areas and providing effective monitoring methods for mine gas accident relief.
system composition
It mainly consists of underground working flour dust filter, single tube, underground primary water filtration device, branch box, bundle tube, surface secondary water filtration device, vacuum pipeline system, gas sampling automatic control cabinet, bundle tube dedicated chromatograph, data processing workstation, and explosion triangle software.
Working principle
Gas is collected from multiple working faces underground, filtered through dust, and transported to a distribution box through a single pipeline. After primary filtration, it is connected to a bundled cable and sent to the surface analysis room; After entering the second stage of water filtration in the sampling cabinet, a small amount of "fresh" sample gas is automatically taken into the chromatograph for sample gas analysis, and the remaining gas is discharged outdoors through a vacuum pipeline system.

Main features:
1. Safe and reliable ground analysis and negative pressure collection system
The analysis center and negative pressure gas source power device are installed on the ground; Underground non electrochemical sensors and surface electrical equipment do not require strict anti riot level requirements, making them safe, reliable, and easy to maintain.

2. Original integrated gas sampling automatic control cabinet
The gas sampling system, flow display and regulation device, and ground secondary water filtration device are integrated into one; Small size, few pipeline joints, short pipeline, achieving minimum gas resistance; Only one joint is needed to connect the underground bundle tube to the surface analysis instrument, simplifying installation. Solved the problem of dense and spider like connections in indoor beam tubes in conventional analysis.

3. Pioneering flow display and adjustment function
Each bundle tube is equipped with a flow display and adjustment device, which can intuitively reflect the working condition of each bundle tube; Measure the flow velocity and flow rate of each bundle tube to accurately determine the lead time of each analyzed sample gas; By monitoring the flow rate, it is possible to promptly address any blockages in the underground bundle tube.

4. Optimizing the design of negative pressure pipeline system to ensure pumping efficiency
Adopting Siemens water ring vacuum pump, with reliable quality, advanced and stable performance; The design of vacuum pipes with diameters such as inlet and outlet interfaces for vacuum pumps is an effective means of ensuring pumping efficiency; Dual vacuum pump switching, automatic check function, and emergency bypass pipeline switching function ensure the emergency instantaneous switching and reliable operation of the dual pipeline system.

5. Original no resistance vacuum pipeline automatic check function
This control device works synchronously with the vacuum pump, automatically controlling the opening and closing of the vacuum pipeline, effectively solving the problems of water return during shutdown and sample gas pollution, and maintaining continuous and effective sample gas during the second start-up after a short shutdown; And there is no resistance or pressure loss to the vacuum system. Under normal circumstances, even the best mechanical check valves can reduce pumping efficiency by more than 30% in terms of resistance.

6. Engineering solutions that meet special customer requirements
We provide a special engineering solution with a collection distance of over 10 kilometers and an expansion of monitoring channels to meet the on-site needs.