Kellogg’s 300,000-ton synthetic ammonia plant: How to analyze the performance of the waste heat boiler based on various parameters?
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This post was last edited by ZZJJAA70 on 2009-12-2 at 13:43: How to analyze the performance of the waste heat boiler based on parameters for Kellogg’s 300,000-ton synthetic ammonia plant? How can operations be improved in production?
Based on the parameters we have been using recently, the heat exchange efficiency of the waste heat exchanger has decreased significantly; the density difference between steam and liquid has dropped from 40 KPA to less than 10 KPA. The temperature difference between the inlet and outlet of the process gas has decreased from 965 degrees to 405 degrees (a difference of 560 degrees) to 950 degrees to 420 degrees (a difference of 530 degrees). So what is causing the continuous deterioration of heat exchange efficiency? ——–Scaling? ? ?
Will an inverse cycle occur when the density difference is close to “0”? ! !
A decrease in temperature difference of this magnitude alone is not sufficient to cause a significant change in density difference. The densitometer should be able to be calibrated. Under normal operation, reverse circulation is not possible. This is only possible under abnormal operating conditions, such as a short-term interruption of heat supply.