Analysis of causes of temperature collapse of synthesis tower
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I hope everyone can analyze the reasons for the collapse of the synthesis tower that you have seen or heard about. I have seen it once, and it was a 1-meter tower. Because of the reverse cycle machine, No. 6 was poured into No. 5. The air intake volume of the No. 5 cycle machine was much less than that of No. 6. When it was converted to No. 6, the amount of main line became less, and the catalyst temperature rose quickly. As a result, the master opened the line too much. . . . and the temperature collapsed. . . .
When we were heating up, when the temperature was about the same, a master stopped the electric stove and it immediately collapsed, leaving others confused. Later, we found out after further investigation, and the other masters were so angry that they cursed the master who stopped the electric stove.
The on-site experience of the operator is very valuable. When the circulation volume decreases, how much the cold auxiliary line should be opened depends on daily accumulation. In some positions, the process and principles are well understood, but the appropriate opening degree of a valve needs to be explored on the spot. When encountering this situation, the only option is to operate conservatively. You can control the temperature a little higher, first ensure that the temperature does not drop, and then adjust slowly.
I have never seen a temperature collapse of a synthesis tower. It usually does not happen. It is caused by trace amounts and ammonia. As long as it is handled in time, it will not collapse.
I agree with the author on the third floor, the adjustment range should be small, and the furnace temperature is a gradual process.
The reasons for temperature collapse are 1. The cold shock valve opening is too large. When moving the cold shock pneumatic valve to the electric valve, I forgot that the diameter of the pneumatic valve is reduced before entering the valve body, and directly adjusted the valve position of the electric valve to the original valve position of the pneumatic valve (cold shock flow is not easy to use). As a result, the cold shock flow increased instantly, causing temperature collapse. 2. The liquid level of the ammonia evaporator was empty. Once again, because the evaporator liquid level self-adjusting valve did not work well, it had to be shut down for maintenance. In order to maintain production, it was manually controlled. As a result, the evaporator became empty and the ammonia entering the tower increased, causing temperature collapse. 3. The gas composition is not good, such as high trace amounts, imbalanced hydrogen-to-nitrogen ratio, high levels of other ingredients that can poison the catalyst, and failure to adjust in a timely manner to cause temperature collapse. This is generally caused by careless operation, so everyone must operate carefully. Before adjustment, ask a few more questions and don't take chances. This post was last edited by snowdfr on 2009-3-3 08:28 ]
The reason why your unit synthesizes Tarquawen is as follows:: When the circulation machine No. 6 was changed to No. 5, the circulation volume was reduced, and the fresh gas did not change at this time, resulting in an increase in reaction heat. The operator saw that the tower temperature was rising too fast, fearing that the catalyst would burn out, so he opened the cold auxiliary line too much, causing the bed temperature to drop too fast, and then the adjustment was not timely, which led to temperature collapse.
Operational proficiency depends on practice and rich experience.
The conditions that caused the temperature collapse of the synthesis tower were discussed on the second floor. First, it was the operator’s experience.； The second is the issue of responsibility. Except for the inevitable factors caused by equipment defects, temperature collapse of the synthesis tower rarely occurs.