What are the reasons for a sudden increase in the furnace temperature of a synthesis tower, and what are the reasons for a sudden decrease?

Reasons for the sudden increase in the furnace temperature of the synthesis tower: a sudden increase in the amount of fresh gas supplied, a sudden improvement in the hydrogen-to-nitrogen ratio, incorrect adjustments to the furnace temperature (adjustments should have been made to lower the temperature, but in reality they were made to raise it), a sudden decrease in the ammonia content at the inlet of the synthesis tower, and a sudden reduction in the amount of circulating gas due to the shutdown of the circulator. Reasons for the sudden drop in furnace temperature in the synthesis tower: In addition to the reasons mentioned above, it can also be due to a slight increase in the ammonia content in the circulating gas, as well as a small amount of fresh makeup gas.

Poor control of the ammonia cooling temperature, with large fluctuations, can also cause fluctuations in the furnace temperature, such as fluctuations in the water flow rate of the cooling coils and the pressure in the main ammonia pipeline

Reasons for the sudden increase: 1. The load was increased too quickly, while the circulation volume could not be increased in time. 2. The fresh gas is of poor quality; a large amount of oxides enter the synthesis tower, causing catalyst poisoning. 3. During the catalyst heating and reduction process, once the catalyst’s activity improved, the operating conditions were not adjusted in a timely manner. 4. Compressor surge – Reasons for the sudden drop: 1. Too rapid load reduction, untimely adjustment of operating conditions. 2. The fresh gas did not meet the required standards, and this was not detected in time, resulting in catalyst poisoning and deactivation (at this point, the tower pressure should increase). 3. The temperature at the inlet of the synthesis tower dropped significantly, and this was also not noticed in time. 4. . Compressor surge