Portable gas chromatograph (mine gas analysis)

Product Description:
Coal mine underground gases include hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, methane, ethane, ethylene, acetylene, propane, butane and other gases. Mixing methane with oxygen in a certain proportion can easily cause explosion hazards, while high concentrations of other gases can easily lead to poisoning or fires, causing great harm to mine rescue operations. It can timely and accurately detect the content of common toxic and harmful gases underground, provide scientific and effective data for rescue personnel, and provide reliable basis for command and decision makers to formulate rescue policies. It is of great significance for mine rescue.
　　　
Technical features:
◆ GC-3000Portable gas chromatograph (mine gas analysis)It is a portable chromatograph developed based on laboratory chromatography. Specially developed for mining gas analysis, it is compact in size, easy to carry, and suitable for installation on mining gas chemical analysis vehicles.
Adopting a three detector process: thermal conductivity detector, hydrogen flame detector, and installation of a conversion furnace. The sensitivity of the hydrogen flame detector can be automatically adjusted based on the methane content to avoid masking trace components of methane with high methane content.
◆ Three stainless steel packed columns are used to effectively prevent cross contamination of chromatography columns and ensure long-term uninterrupted operation of the entire instrument
◆ Ten way valve injection device, capable of analyzing multiple gases in one injection: O2、N2、CO、CO2、CH4、 Ethane, ethylene, acetylene, propane
Fast analysis speed: Within 4-8 minutes, a single injection can complete the analysis of the gas constant of mine gas explosion.
Equipped with a 2-liter gas cylinder, easy to carry and arrive at the rescue site in a timely manner.
Equipped with an automatic gas sampler, it shortens the sampling time.
◆ Equipped with a mine gas analysis chromatography workstation, it can set alarm values for various gas concentrations and alkene ratios, and automatically alert for methane and oxygen concentrations entering the gas explosion triangle. The results of both automatic and manual injection can be stored in the database. In the database, historical data or trend charts can be printed (or queried) by time or sampling location, and the distance between gas explosion triangles and historical data can be displayed.
◆ It can achieve online automatic analysis, and through the installation of pipeline instruments, it can automatically sample on a periodic basis. It can monitor and calibrate the process sample gas continuously without the need for manual calibration. The probe of the pipeline can be manually sampled and tested in places where it has not been laid, which is flexible and reliable.

Instrument features:
Equipped with a large screen, the display content is rich and intuitive, and can directly display spectra and results.
● Equipped with 6 temperature controls, each set from room temperature to 450 ℃, increment: 1 ℃, accuracy: ± 0.1 ℃
Equipped with a 16 stage programmed temperature rise, it meets the requirements for complex sample analysis.
● Lift rate: 0.1-39 ℃/min (ordinary type); 0.1-80 ℃/min (high-speed type)
8 external control events can achieve instrument automation operation, and online analysis can be achieved through pipeline laying.
Multiple injection methods to choose from: column head injection, split/non split injection, valve injection, headspace injection.
Install hydrogen flame detector, thermal conductivity detector, and methane converter.
Choose between mechanical valve control or electronic proportional valve control (electronic proportional valve is 16 way control)
The gas pressure and flow rate are measured by precision sensors, and the measured values are displayed on the screen.
Working modes of electronic proportional valve: 1. Constant current mode, 2. Constant pressure mode
5 types of gas media for electronic proportional valves; Nitrogen, hydrogen, air, helium, argon
Instrument parameters:
Pressure: 0-0.6Mpa; Flow rate 0-100 sccm or 0-500 sccm (air)
■ Control accuracy of electronic proportional valve:
Pressure: 0.01Kpa;
Flow rate: 0.01 sccm
Pressure sensor:
Accuracy:<± 2% of full scale
Reproducibility:< ±0.05 KPa
Temperature coefficient:< ±0.01 KPa/°C
Range: 0-0.3MPa or 0-0.6MPa;
■ Flow sensor:
Accuracy:<± 5% of full scale
Reproducibility:<± 0.5% (full scale)
Range: 0-500sccm
Hydrogen flame ionization detector (FID)
Detection limit: Mt ≤ 3 × 10-12g/s (n-hexadecane-isooctane solution);
Baseline noise: ≤ 5×10-14A
Baseline drift: ≤ 1×10-13A/30min
Linear range: ≥ one hundred and six
Thermal conductivity detector (TCD)
Sensitivity: S ≥ 3500mV • ml/mg (n-hexadecane isooctane solution) (amplification 1, 2, 4, 8 times optional)
Baseline noise: ≤ 10μV
Baseline drift: ≤ 30μv/30min
Linear range: ≥ 104