Filler selection for desulfurization towers in ammonia synthesis plants
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Our plant has a capacity of 60,000 tons; the input flow rate is 1.2 g, while the output flow rate is 110. We use step rings of size 76 for the inlet side, and step rings of size 50 for the outlet side. The input flow rate is usually around 170, while the output flow rate is around 10. The catalyst used is 888 plus tannin. I wonder what kind of packing is used in your plants? How effective is it?
The desulfurization efficiency is not only related to the equipment hardware but also greatly depends on the catalyst. If the hardware is not suitable, it’s unlikely that any catalyst will work well. If the equipment is in good condition, any catalyst will give similar results, and it will generally meet the production requirements. In terms of desulfurization, DDS performs quite well; it generally manages to reduce the sulfur content to below 10 levels. However, its consumption may be higher compared to other catalysts.
Generally, desulfurization solutions absorb hydrogen sulfide very quickly; the regeneration system is the main factor to consider, and a two-stage bubble column can be used for the absorption tower. A sulfur content of 1.2 g is not high.
Both NHD and low-temperature methanol washing are good methods! For small scales, it is recommended to use NHD. But the cost is high! But it works very well! The packing for the tower can be Baffle rings or stepped rings, etc.!
Our company uses plastic Pall rings. A lot was spent on the major overhaul in 2007 as well. Desulfurization tower and secondary desulfurization tower.
Both the semi-desulfurization and advanced desulfurization processes in our plant use 50 Haier rings; the desulfurization effect is satisfactory. Advanced desulfurization makes use of DDS for desulfurization – the sulfur content is 100 mg/l before desulfurization, and it is normally below 5 mg/l after desulfurization； The size of the Haier ring is related to regeneration. The regeneration effect is good, and sulfur foam flotation performs well; smaller Haier rings can be used to improve the desulfurization efficiency ； The regeneration effect is poor, sulfur foam flotation is inadequate, and the suspended sulfur level is high; larger Haier rings can be used to prevent clogging.
Do you know what the differences are between Haier rings and stepped rings in terms of usage? Does your organization still use Haier rings, or were there other types used in the past? I hope you can provide an answer. Thank you
Based on the gas volume and sulfur content, as well as the pressure difference before and after desulfurization, an appropriate filler can be selected accordingly. The main types of fillers include traditional bamboo raft fillers, plastic grid fillers, and plastic Bola ring fillers. Plastic grid fillers are recommended as they have a large specific surface area, high air permeability, are less prone to clogging, and allow for long-term operation.
I believe the filler used by your plant is very suitable; even when burning high-sulfur coal, there should be no problems. Our plant uses 76-step rings for semi-dehydration, and 30 Haier rings for complete dehydration (these rings tend to cause blockages in the tower). The inlet pressure for semi-dehydration is around 2 G, while the outlet pressure is around 100 G ； The variable discharge at the inlet is around 260–350, while it’s around 10 at the outlet. :lol :handshake Last edited by 7276166 on 2008-3-23 18:43 ]
Is the Biantuo 30 Haier Ring effective?