Venting of non-condensable gas (hydrogen)?

I’m not sure whether it’s continuous or intermittent. If it’s continuous, the intake tank can probably be reused for gas purposes; if it cannot be reused, then the flare system must be the only option. What are everyone’s opinions?

The pressure is a bit high; if it’s low, discharge can be carried out under steam cover.

The hydrogen separated by our device is directly discharged into the gas pipeline network. If releasing it into the atmosphere is too dangerous, it is recommended not to use this method, as safety comes first.

It is prohibited to release hydrogen indoors; for pressure relief, it must be discharged through a vent pipe.

If there are separate control mechanisms for system pressure and for the amount of non-condensable gas released, the following approach is generally adopted: 1. During normal production, the gas (fuel gas) is discharged into the gas system for reuse as fuel； 2. Released into the flare system under abnormal conditions or during system replacement ； The above two emission schemes can be switched online. Last edited by Technician on 2008-2-14 16:20.]

It should be discharged continuously, and it’s best to strictly control the pressure to prevent too many active ingredients from being released

Generally, a gas-liquid separation device (such as a liquid separation tank) is used; under normal continuous production conditions, the gas should be discharged into the gas system or recovered. If the operation is intermittent, there is no issue with separation. If gas release is necessary and its pressure is too high, the pressure should be reduced before releasing it from a higher altitude.

If emptying is required, don’t forget to install a flame arrester on the emptying pipe

The gas in the system is mixed with hydrogen and compressed before being condensed at a pressure of 0.8 Mpa. Under these conditions, some of the heavier components in the system’s gas have already condensed and need to be recovered. The gas mainly consists of C1/C2 and H2, and needs to be emitted intermittently or continuously. As for how to discharge non-condensable gases and hydrogen, it is believed that if the volume of gas is large, a pressure control valve can be used, with a set pressure of 0.8 Mpa ； If the gas volume is small, a self-acting pressure control valve can be used, with a set pressure of 0.8 Mpa as well. Both need to be connected to the gas pipeline network; firstly, this results in lower processing losses, and secondly, given current environmental regulations, it is absolutely necessary to prevent any emissions in order to avoid environmental pollution. This also helps to save energy, reduce consumption, and lower emissions.

It depends on the quantity; if it’s large and the conditions permit, energy recovery should be considered. However, if the quantity is small (I assume it’s generally small when condensation does not occur), in cases where the distance is large, direct discharge is advisable; steam (or nitrogen) should be added for dilution during discharge.

Based on the poster’s description, H2 is a non-condensable gas; the rest should be condensable. Since H2 is light, it can be released at high altitudes after being passed through a flame arrester. It is important to ensure that the altitude, anti-static measures, and explosion-proof distances meet the required standards. If large quantities are involved, recycling should be considered.

Thank you for the help; it’s exactly what I needed! Thanks!

With proper design of the processes and equipment, non-condensable gas emission control technologies can minimize emissions, while also allowing for stable control of tower pressure