Function and Performance Requirements for Rapid Direct Gas Content Determination Device:
The rapid direct gas content determination device is primarily used for directly and quickly measuring and calculating the desorbable gas content in coal seams, providing a reliable basis for the direct and accurate determination of mine gas parameters. This device complies with new standards and can rapidly measure coal seam gas content and desorbable gas content. The measurement is unaffected by geological structures or mining impacts, allowing coring and laboratory determination of coal seam gas content to be completed within 8 hours. Equipped with software management and calculation functions, it enables automated content calculation and experimental report output. The device consists of underground sampling equipment, underground desorption equipment, surface desorption equipment, weighing equipment, moisture determination equipment, data processing system, and other components.
Main Equipment Configuration
Basic components of the rapid direct gas content determination device (including but not limited to the following configurations):
1 Underground coring and underground desorption system: 10 sets;
2 Mechanical stopwatch: 10 units;
3 Surface gas desorption system: 1 set;
4 Weighing system: 1 set;
5 Coal sample crushing and desorption system: 1 set;
6 Moisture determination system: 1 set;
7 Data processing system (software): 1 set;
8 Data processing workstation: 1 unit;
9 Printer: 1 unit.
Main Technical Parameters:
Applicable environmental conditions: Operating temperature: 0–38°C; Operating relative humidity: ≤95%; Atmospheric pressure: 75–134 kPa.
Main Technical Indicators: (1) Measurement time: <8 hours; (2) Underground coring and underground desorption system
① Coring tube diameter: φ73 mm; Coring depth: >30 m; Coring borehole inclination: >12°.
② Underground desorption system: Desorption tube range: 800 ml; Smallest graduation of underground desorption tube: 2 ml;
Aneroid barometer: Plain type (80–106 kPa), c. Underground type (92–134 kPa).
(3) Surface gas desorption system
① Operating power supply: 220 V/50 Hz;
② Smallest graduation of desorption tube: 5 ml;
③ Effective range of desorption tube: 1000 ml/tube, 1500 ml/tube;
④ Desorption tube error: 1000 ml: ±5 ml; 1500 ml: ±10 ml;
⑤ Micro vacuum pump pumping rate: 3 L/min;
⑥ Electronic thermometer: 0–50°C;
⑦ Electronic barometer: 750 hPa–1340 hPa.
(4) Weighing system
① Maximum weighing capacity: 2000 g;
② Sensitivity: 0.1 g;
③ Power supply voltage: 220 V/50 Hz.
(5) Coal sample crushing and desorption system
① Feed particle size: ≤26 mm;
② Discharge particle size: (80–200) mesh;
③ Operating power supply: 220 V/50 Hz;
④ Single feed capacity: ≤1000 g/bowl;
⑤ Crushing time: (3–5) min;
⑥ Motor power: ≤1.5 kW.
(6) Moisture determination system
① Maximum load: 10 g;
② Division value: 5 mg;
③ Differential scale reading range: (0–1) g;
④ Temperature adjustment range: 75–160°C;
⑤ Moisture determination accuracy: ±0.2 g.
(7) Data processing system
① Software operating environment: Windows XP, Win7, Win10 systems;
② Main software functions: User management, gas content W value calculation, residual gas content Wc calculation, gas pressure conversion, report output, and help.
(8) Workstation configuration: Mainstream brand computer, including: CPU with I5 series or above 4-core processor, memory ≥8 GB, hard disk ≥1 TB, optical drive: DVDRW, dedicated graphics card (video memory ≥1 GB), 19-inch widescreen LCD;
(9) Printer: Laser black and white printer, A4 size, high resolution: 1200x1200 dpi, with network printing capability and automatic duplex printing function.

Zhengzhou Aidi produces rapid direct gas content determination devices, supplying coal drill cuttings desorption meters, deep-hole sampling devices, pressure gauges, geological exploration desorption meters, borehole flow meters, mine extraction and outburst prevention equipment, true density meters for coal, gas content meters, automatic initial gas emission rate meters, diffusion rate meters, gas parameter meters for coal extraction pipelines, and borehole coal powder circulation devices.