Product Description:

The GC-9280 gas chromatograph (specifically designed for mine gas analysis) consists of a main unit, a high-performance chromatography column, a methane converter, a thermal conductivity detector, a dual hydrogen flame detector, and an automatic injection system. It is controlled by a microcomputer and can achieve automatic injection of six valves and automatic switching of detector signals. The signals are collected and processed by a mine gas dedicated chromatography workstation. shouldinstrumentAs a supporting device for the monitoring system of spontaneous combustion fires in coal mines, it is widely applicable to the prediction and prevention of natural fires in large, medium, and small coal mines. Regarding underground O2、 N2、 CO、CH4、 CO2、 C2H4、 C2H6、 C2H2By monitoring the gas content continuously for 24 hours and determining and analyzing the natural fire marker gases, the temperature changes at the ignition point can be predicted and forecasted in a timely manner, providing a scientific basis for the prevention and control of natural fires and mine gas accidents in coal mines.

The instrument is manufactured based on the principle of chromatography, and can achieve the analysis of H using efficient dedicated chromatography columns and analysis processes2, O2, N2, CH4, CO, CO2, C2H4, C2H6, C2H2The mixture is subjected to rapid separation and high-sensitivity detection. This instrument is a specialized chromatograph designed for coal mine fire prediction and fire safety. It can analyze the atmosphere of mine gas, predict the degree of gas explosion danger in fire prediction, and fully analyze the components of gas outburst. The instrument has high impact resistance and vibration resistance, and can be applied to vehicles.

Instrument features:

Using microcontroller and integrated circuit control, Chinese interface, and keyboard settings for operating parameters. The instrument has power failure protection and file storage functions. Adopting a large screen LCD display. At the same time, the instrument has a stopwatch timing function.

The instrument adopts a three column and three gas path structure, with thermal conductivity detector and dual hydrogen flame detector working simultaneously, and three signal channels collecting data simultaneously; The detector and its control components adopt a plug and play control mode.

Can perform constant temperature and programmed heating operations. It has over temperature protection function. The column room is equipped with a flexible rear door automatic temperature control system. It can achieve true near room temperature operation and five stage programmed heating.

Using self-developed automatic injection valve, complete full component analysis and explosion hazard level discrimination within 10 minutes of one injection, with short analysis time; Manual and automatic injection can be freely selected.

The unique software and hardware design of the operation control system enables the instrument to automatically monitor the entire system during operation, fundamentally eliminating the phenomenon of instrument temperature and operating parameter loss of control. It has achieved no "fault" over temperature protection, as well as unique active over temperature protection function and dual hardware self-locking over temperature control structure, ensuring the safe operation of the instrument when unmanned.

Through software design, during the instrument heating process, the column chamber temperature is always 20 ℃ lower than the detector temperature for heating, effectively avoiding detector contamination.

The instrument has high temperature protection function. If any temperature control exceeds a certain range of the set temperature (set value is 20 ℃), the instrument will be powered off for protection and alarm.

The carrier gas circuit has low pressure and gas cut-off protection functions.

Pre installed backup temperature control port, easy to expand and use.

Technical Parameter

1. * Small detection concentration: O2, N2 ≤ 0.05% H2 ≤ 5ppm CO ≤ 0.5ppm
CH4、CO2、C2H4、C2H6、C2H2≤0.1ppm

2. Analysis cycle: One injection, for H2, Complete analysis of O2, N2, CH4, CO, CO2, C2H4, C2H6, and C2H2 components, with an analysis period not exceeding 7 minutes

3. Number of detectors, amplifiers, and output signal channels that can work simultaneously: 3

4. Event control (external control device switch control): Control * load 220V AC 1A

5. According to the user's long-term warning requirements, instrument configuration can be increased to analyze the C3 and later components in coalbed methane, expanding the analysis scope.

Specification

1. Temperature control

(1) Column temperature;

Temperature control range: room temperature plus+3 ℃ to 400 ℃.

Temperature control accuracy: better than ± 0.1 ℃.

Temperature gradient: Room temperature plus+5 ℃ to 400 ℃, with no more than 1% within the effective area of the column chamber.

Program heating order: five orders.

Heating rate: 0.1-40 ℃/min.

Initial and final temperature control time: 0-600min.

The repeatability of program heating should not exceed 2%.

(2) Temperature control accuracy of vaporization chamber and detection chamber:

Vaporization chamber: better than ± 0.1 ℃

Testing room: better than ± 0.1 ℃

2. Thermal conductivity pool detector

(1) Sensitivity: not less than 3000mvml/mg (benzene)

(2) Noise: not exceeding 0.035mV

(3) Drift: not greater than 0.5mV/h

3. Hydrogen flame ionization detector

(1) Detection limit: not greater than 1 × 10-11g/s。 (Benzene/cs2)

(2) Noise: not exceeding 0.025mV

(3) Drift: not greater than 0.15mV/h

4. Instrument size and weight.

Dimensions: 635 × 490 × 470mm

Weight: Approximately 55kg

Update time: 2020/9/4 16:49:45