Regarding the issue of heat extraction outside the re-pressurization device?
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This post was last edited by Final Fantasy on 2010-7-18 at 22:40. The external heat extraction performance of our 600,000 tons/year catalytic reforming unit has always been poor. During this maintenance period, the fluidization nozzles used for external heat extraction were replaced, but the situation remains unsatisfactory since the unit started operating again!? (It would help if some non-purified air were used.) Are there any good solutions?
Could you specify the aspects of the phenomenon? What does it mean to have poor performance?
The temperature in the middle is around 95 degrees, while the temperature at the bottom is around 100 degrees – these values are quite low. When these two temperatures are increased slightly to generate steam, they go up! Of course, when those two temperatures are increased again, the temperature at the top (above 390 degrees) also rises accordingly, and it seems that the fluidization is not optimal
It seems that the external heat exchanger is not in a fluidized state, which is why the temperature doesn’t rise.
We thought of that as well, but adjusting the air volume doesn’t have a significant effect! Are there any good suggestions for adjustment? Thank you in advance!
This post was last edited by fengdingwen on 2010-4-3 at 19:24. The same is true for our external extraction process: the steam generation rate is not high, and sometimes when the steam generation rate suddenly increases, fluidization may stop. The differential pressure of the special valve used for external extraction is very low, and the temperature at the measurement point is also very low
What is the form of the external heat exchanger?
Have a design institute redesign it.
What is the form of external application? Is there slide valve control?
Do you think the amount of steam produced indicates a good fluidization state?