Process selection for 300,000 tons of synthetic ammonia production
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Our company is preparing to build a synthetic ammonia plant with a capacity of 300,000 tons (accompanied by a phosphatic ammonium fertilizer plant with a capacity of 1 million tons). We are seeking the assistance of those with experience in large-scale synthetic ammonia production in order to help us select the appropriate process, which will enable us to construct an environmentally friendly and energy-efficient synthetic ammonia plant quickly and effectively.
I suggest the original poster get in touch with the design institute; after all, they have experience in this area.
If the coal type is suitable, it is recommended to use the water-coal slurry pressurized gasification process (the opposed four-nozzle gasification technology developed by East China University of Science and Technology or the multi-feedstock slurry gasification technology developed by Northwest Research Institute) + sulfur-resistant shift process + low-temperature methanol washing + liquid nitrogen washing + low-pressure synthesis technology. Sulfur recovery can be achieved using the Claus sulfur recovery process or the Topsoe wet acid production process.
Thank you. May I also ask, which domestic coal gasification processes are performing well at present?
The last edit to this post was made by 654262293 on 2012-3-21 at 14:33. It is said that the Shell powder gasification plant operated by Longyu Coal Chemicals, which belongs to Yongmei Group, is currently functioning well. Shell powder gasification at Guizhou Tianfu is said to be operating well too!
Coal dust: In terms of gasification units in China, Shell was quite popular a few years ago, but companies ended up paying high costs and losing time as well as other resources. The units operated by SHELL Anqing Petrochemical and Zhongyuan Longyu performed fairly well. Nowadays, the HT-L type of units are more popular; Henan Longyu, Anhui Linquan, and the newly established Luxi Chemical also seem to be doing well – much better than Shell’s units. Currently, HT-L has secured many orders, while GSP is in a poor situation. Ningxia Coal has been trying to get its units to work properly for a year now, but they’re still not stable. Datang’s large-scale Shell units also resulted in heavy losses
Liuhua is doing well with Shell as well. .
For coal gasification technology, it is better to use domestically produced options; we shouldn’t rely solely on imports. Shell has been around for many years, yet there aren’t many systems that operate properly. Why? It’s because there is a significant difference between foreign technologies and the quality of domestic coal. I think domestic products have many advantages.
Space furnace coal pressurized gasification, sulfur-resistant shift reaction, low-temperature methanol washing, liquid nitrogen washing, 15 MPa synthesis. It is said that the LuXi Chemical Aerospace Furnace has been in operation since last October and has remained very stable.
We are in contact with design institutes and are also examining relevant large-scale ammonia synthesis plants, aiming to gain more exposure to, understand more about, and learn from the existing large-scale ammonia synthesis plants through HaiChuan. Thus avoiding taking detours.
This post was last edited by 654262293 on 2012-4-4 at 18:19. The ammonia synthesis process is highly mature; as the previous contributors have explained clearly, sulfur-resistant shift reactors, low-temperature methanol washing, liquid nitrogen washing, and low-pressure synthesis are all well-developed technologies. The key lies in choosing the appropriate gasification process. It is recommended to decide whether to use powder coal gasification or coal slurry gasification based on the slurry-forming properties of the coal. From an outsider’s perspective, if the coal has good slurry-forming properties, then Texaco (GE)’s technology is a better choice, as it offers better operational experience, design expertise, and more rational process configuration compared to Shell and other gasification methods.