The carbon monoxide content in the carbon dioxide product gas (off-gas) from low-temperature methanol washing is high
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The carbon monoxide content in the carbon dioxide exhaust gas is around 5%, and since the gas is released through the on-site chimney, the carbon monoxide alarms there keep triggering. I don’t know how to lower it; please, experts, help me figure it out
~The flashing effect in the medium-pressure zone is not good; try reducing the flashing pressure slightly~
Still recycle it; if that doesn’t work, burn it in a torch – but it’s such a shame
There is no other option; the only way to deal with CO is through medium-pressure flashing in order to reduce its concentration as much as possible. The remaining CO is either incorporated into carbon dioxide products or released as exhaust gas； If carbon dioxide is also to be emitted as exhaust gas, then the CO level cannot be reduced ； Unless the device is disassembled and rebuilt. Either that, or for the exhaust gas in the previous CO removal column or something, well, I won’t talk about that investment.
The design pressure for flash vaporization in the device was originally 1.8 MPa; it is now 1.68 MPa, but there doesn’t seem to be any difference
When it drops to 1.68, there are no significant changes in the analysis; so continue to lower it, taking into account whether your compressor can handle it. Slightly increase the liquid phase temperature in the medium-pressure flash tank and take samples for analysis. I’m not sure whether the hydrogen sulfide level in your exhaust gases meets the specified standards
The hydrogen sulfide level is within the acceptable range, and it is much lower than the process specifications
Check whether the pressure of the reabsorption system is stable, whether the methanol regeneration efficiency is satisfactory, whether the medium-pressure flash vaporization pressure is well controlled, whether the pressure and temperature in the absorption tower are normal, and whether the exhaust gas absorption tower is operating properly.
You might try lowering the liquid level in the medium-pressure area as well, to create more flash space; we usually keep it around 30~~~
The process needs to be adjusted! Simply adjusting the pressure of the flash tower has little effect. Linde process? Which factory are you from?
Oh, our new factory is currently operating at half capacity; the cooling capacity of the system in this section is insufficient. Once it’s operating at full capacity, we’ll increase the temperature of the medium-pressure flash and see what happens