Hydrogen Generator for ChromatographyIt is a commonly used hydrogen gas source equipment for gas chromatographs, and its operation needs to follow standardized procedures to ensure stable operation of the equipment and avoid safety hazards. The following are 6 core operating points for easy and quick mastery:
Preparation before startup
Check the appearance of the equipment for any damage and ensure that the pipelines are not aged or cracked. Confirm that the liquid level of the electrolytic cell is between the specified scale lines. If it is insufficient, special electrolyte should be supplemented (it is strictly prohibited to mix ordinary distilled water or other liquids).
Connect the hydrogen output pipeline, ensure that the joint is sealed and leak free, and confirm that the gas chromatograph end valve is closed to prevent gas reflux.
Power-on operation
First, connect the power supply and turn on the main switch of the device. After the self check of the device is completed, gradually adjust the output pressure to the rated pressure required by the chromatograph (usually 0.3-0.5MPa, matching the requirements of the chromatograph). The pressure adjustment should be slow to avoid sudden high pressure impact on the gas path.
Observe the pressure gauge and flow display of the equipment to confirm that the values are stable without fluctuations. At the same time, check the pipeline joints with soapy water to check for any air leaks.
Running process monitoring
Regularly check the liquid level of the electrolytic cell during operation. If the liquid level drops to the lower limit, the electrolyte should be replenished in a timely manner. When replenishing, the gas source should be turned off and the pressure should be released to prevent hydrogen gas leakage.
Pay attention to the temperature, pressure, and alarm indicator lights of the equipment. If there are overpressure or overheating alarms, immediately stop the machine and troubleshoot. It is strictly prohibited to operate with faults.
Keep the equipment operating environment ventilated and dry, avoid dust and corrosive gases from entering, and stay away from open flames and high-temperature heat sources.
Linkage with chromatograph
After the pressure of the hydrogen generator stabilizes, open the hydrogen valve of the chromatograph and switch and debug the carrier gas or gas according to the operating procedures of the chromatograph.
If hydrogen is used as gas, it is necessary to ensure that the ratio with air meets safety regulations to prevent the risk of explosion caused by improper ratio.
Shutdown operation
First, close the hydrogen valve on the chromatograph end, then gradually reduce the output pressure of the generator to atmospheric pressure, and then turn off the power switch of the equipment and disconnect the power supply.
If the equipment is shut down for a long time (more than 1 week), residual hydrogen gas in the equipment should be drained, the electrolyte should be properly sealed, and the gas interface should be sealed to prevent impurities from entering.
Daily maintenance and upkeep
Regularly replace the desiccant and filter element of the filtration device (usually every 3-6 months, adjusted according to the frequency of use) to ensure the purity of hydrogen gas.
Inspect the electrolytic cell every six months to clean impurities on the electrode surface. If the electrolyte becomes turbid or discolored, it should be replaced promptly.
Establish an equipment operation ledger to record startup time, pressure parameters, maintenance status, etc., for easy traceability of equipment status.