Ammonia synthesis technology

The characteristic of the Topsoe process compared to the Kellogg process is that the recycle section is placed before the ammonia synthesis tower, allowing the ammonia synthesis tower to be at the highest pressure in the recycle loop. Moreover, compression takes place after ammonia separation, resulting in a lower volume of recycled gas and thus less cycle work required. The advantages of the internal components of the Cassali reactor are taken from http://bbs.hcbbs.com/thread-388961-1-2.html%BF%A8%C8%F8%C0%FB%BA%CF%B3%C9%CB%FE%B5%C4%D3%C5%B5%E3. The internal components of the Cassali reactor have the following advantages: (1) The gas flows radially through the catalyst bed, thereby reducing the pressure drop in the reactor. According to the preliminary quote provided by Cassali Company for this project, the overall pressure drop is around 2.5 bar. (2) The ammonia net value is high, reaching around 18%. Make full use of the entire catalyst bed, including the top layer. (3) A method combining inter-bed heat exchange and inter-bed quenching is employed to regulate the temperature of the catalyst bed, offering flexible and rapid control. (4) The first and second catalyst baskets can be removed from the internal components separately; gravity sealing is used between the three catalyst baskets, while the third catalyst basket is fixed to the internal components and does not require sealing. The upper and lower heat exchangers are fixed together with gaskets, and a labyrinth seal is used between the two heat exchangers to enable easy removal.