Ammonia recovery from synthetic purge gas
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Regarding the recovery of synthetic purge gas, isobaric absorption as well as unpowered ammonia recovery are employed, both yielding good results. I’m just asking here whether there are any simple homemade devices that can be used to recover some of the ammonia in advance. Please give me some advice, experts: handshake
A few days ago, I was learning about a technique that involves using ammonia coolers to reduce temperature at constant pressure; for these coolers, self-produced liquid ammonia is used, while gaseous ammonia is fed directly into the inlet of the ice maker or at the high-pressure point for ammonia absorption, which yields good results. Ready to give it a try.
We currently have a device similar to this, but the effect is not very noticeable. We think the heat exchange area is insufficient; however, we are not familiar with the theoretical calculations related to heat exchange. Please advise us
The calculation method should be available in the chemical engineering design manual. The amount of ammonia required is calculated based on the volume of gas and the degree of temperature reduction; thereafter, the heat exchange area is determined by referring to the heat exchange equipment design manual using the heat transfer rate, in order to select the appropriate heat exchanger.
This post was last edited by Chemical Gas Purification on 2010-11-28 08:51. The ammonia content in the recycled syngas obtained from ammonia separation is around 3.5% v; deep cooling (–25 to –40°C) can be used to separate this ammonia, but the amount that can be separated is limited. If a homemade simple device is to be used, water can be used for absorption followed by distillation ； It can also be absorbed using acid, but the cost is high.
The ammonia content in the exhaust gas can reach around 50% in summer; low-temperature condensers need to take into account the recovery of heat from the exhaust gas in order to reduce energy consumption
Our company offers both isobaric absorption and gravity-driven ammonia recovery; overall, the gravity-driven ammonia method delivers better results and benefits
Reply to 1# Chen Ming: If your company has unused equipment, such as copper towers, it can be modified to improve the recycling efficiency
I still haven’t figured out this process, sigh. .
If the ammonia cooling temperature cannot be reduced by using a self-made ammonia cooler, resulting in poor ammonia separation efficiency, adjustments can be made by adding ammonia from the outside, which can still yield good results.