Carbon dioxide stripping method: low ammonia content at the outlet of the stripping tower
Thread Content
In the carbon dioxide stripping method, the ammonia content at the outlet of the stripper is low, at around 6.4% (the specified value being 8%), while the carbon dioxide content is normal at 10%. The stripping efficiency is 82%. Please discuss what this indicates and why. Last edited by lxq700918 on 2009-4-4 16:27.]
With a low ammonia content, the stripping efficiency is definitely high. This indicates that the stripper of the poster is in good working condition.
The stripping efficiency is quite high; if there are no other issues with the system, this should be a good thing.
Based on the data provided by the poster, although the stripping efficiency is high, the CO2 content is a bit high; could the ammonia-to-carbon ratio in the high-pressure section be a bit low?
I’m also a bit skeptical; my ammonia tank and methylamine solution have a high carbon dioxide content, and there is no gas leakage from the stripping tower
Check whether there has been any change in the ratio of liquid ammonia to carbon dioxide feed; could it be that an increase in the pressure at the CO2 source has led to an increase in the flow rate at the inlet of the CO2 compressor?
“I’m a bit skeptical too; the ammonia tank of mine has a high carbon dioxide content, and there’s no gas leakage from the stripping tower. Isn’t the ammonia level in the ammonia tank always lower than that of carbon dioxide? Otherwise, won’t your ammonia consumption be high? Given your current conditions, the conversion rate for synthesis should be quite high, and the steam consumption should also be low. Is there something wrong?
Generally, the ammonia concentration in the ammonia tanks of various companies is higher than that of carbon dioxide
The ammonia-to-carbon ratio in the high-pressure system is 3.1 to 3.3, which is normal
We have always had higher levels of carbon dioxide than ammonia
I would like to ask the durian moderator: what are the levels of ammonia and carbon dioxide in the effluent from your stripping tower?
Ammonia in the effluent from the stripping tower: 6-7%; Carbon dioxide: 8-9%
I would like to ask the durian moderator: In the material balance sheet provided by the design institute, what are the levels of ammonia and carbon dioxide in the liquid output from your stripping tower? Have you compared it with the actual analysis data?
The amount of ammonia discharged from the stripping tower is below the design value; if there are no errors, that’s certainly ideal, as both energy consumption and material usage will be low, which will please the boss. It is also recommended to check whether the ammonia/carbon ratio is low; operating at a low ammonia/carbon ratio for an extended period can have negative effects, such as hindering corrosion prevention.
I think it’s due to a low ~H/C~; it should be between 0.4 and 0.55! Your conversion rate must be very high~! Your consumption is also very low~! But I think your output could be increased a bit more~! You are operating at low NH3 and low water levels, right?