What are the reasons for the decline in ammonia production?
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1. The 1H/N ratio is fine. 2. The safety valve is not leaking. 3. The temperature and pressure of the catalyst and the synthesis tower are normal. 4. The ammonia level is fine
There is an issue with the production report. Check whether the pressure of the synthesis system has dropped. Check if the bleed air flow rate has increased. Check whether the total carbon content of the raw material has decreased. Check the heat exchanger for leaks. Check the opening degree of the surge valve.
Has the ammonia tank measurement been checked? Then there’s the issue of people
It might be kept high by the inert gas
If all the factors that generally affect ammonia production are normal, then the possible cause is an issue with the instrumentation. 1. There is a deviation in the measurement of ammonia production. 2. There is a deviation in the measurement of system load. Additionally, there are issues with your refrigeration system; poor separation efficiency can also affect ammonia production
5# zyh924116 Consider: first, whether there is a problem with the vent gas; second, whether there is an issue with the freezing unit
It is possible that: 1. There is a problem with the measurement in the ammonia storage tank. 2. The refined gas has a high methane content, resulting in large amounts of vent gas. 3. Reduced airflow.
There are many factors that affect ammonia production. Besides what the original poster and others have mentioned, what is the methane content in the recycle gas of the original poster? Is it due to insufficient gas supply, excessive methane levels, too large a venting volume, or excessive release volume resulting in high ammonia losses? Also, it is necessary to check whether too much ammonia is being used in the relevant ammonia-consuming processes, or if there is any ammonia loss
There’s no problem at all; it’s just a matter of tolerance.
Could the original poster consider looking into and analyzing the following aspects: 1. Has the measurement method changed? 2. Is ammonia recovery in use? How is the operation progressing? 3. Has the amount of inert components in the gas increased, resulting in higher venting? 4. For gaseous ammonia, check the flow meter; for liquid ammonia, examine the load on the refrigeration machine, etc. 5. Has there been any change in the compression volume (have there been changes in the inlet and outlet temperatures of the water cooling systems at each stage)?
1. Reduced make-up gas volume or increased methane in the make-up gas. 2. An imbalance in the hydrogen-to-nitrogen ratio leads to poor synthesis reactions, high system pressure, and large amounts of vent gas. 3. High gaseous ammonia pressure and high ammonia content at the inlet suppress the synthesis reaction. 4. The ammonia flow meter in the ammonia tank is inaccurate. 5. The operator fails to adjust the temperature in a timely manner. 6. Temperature affects ammonia production. 10# ranjichang