The problem of steam not being able to get in
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The main steam line of the reboiler is fully open – why is there no steam flow? I turned the bypass valve of the desuperheater by one turn, and the steam flow was only 200 KG; normally it should be around 3000 KG. I really don’t understand this. I suspect there’s a problem with the strainer, but even when the flow goes only through the bypass line, it still works fine
I actually don’t understand what you mean by your side quest Is it a bypass? In my opinion, the main reasons why the steam flow cannot be increased are as follows: 1. The back pressure of the steam trap is too high, preventing water from being discharged ； 2. Is the liquid level of the material in the tower bottom sufficient? (I’m not sure if your reboiler is of the thermosyphon type.) 3. Is the steam pressure in the main pipeline at the level you require?
Sorry, I pressed the wrong button; haha. Also, has there been any change in the components of the material?； Is the reboiler clogged? ； If the tower is shut down and then restarted, the reboiler condensate is usually drained ；
If the reboiler gets clogged, the safety valve will activate. Is the steam pressure sufficient? If not, activate the bypass of the steam trap
The analyses from those upstairs make sense; I’d like to add something. Check the problem with the strainer; if the float or buoy inside is damaged, there will be no buoyancy, and it won’t be possible to drain water, which results in a high level of liquid in the reboiler. As a result, the steam flow rate will definitely be low.
The last edit to this post was made by Ye Yu Han on 2010-10-25 at 21:03. The main reasons why the steam flow rate cannot be increased, as mentioned in the first comment, are as follows: 1. The back pressure of the trap is too high, preventing water from being discharged； 2. Is the liquid level of the material in the tower bottom sufficient? (I’m not sure if your reboiler is of the thermosyphon type.) 3. Is the steam pressure in the main pipeline at the level you require?
We used to encounter problems with the trap frequently; later, we replaced it with another one
Open all the bypasses of the trap to allow steam to be discharged in large quantities, then gradually reduce them until only condensate is released. By observing the changes in steam flow, it is possible to determine whether there is a problem with the trap
Reply to 2# Wandering All My Life: The bypass is simply a bypass valve. The back pressure is 1 MP, while our steam pressure is 2 MP; even with the bypass in use, no water was detected. The liquid level in the bottom of Tower 2 is fine, and there’s no issue with the steam pressure either
Reply to 3# Wandering All My Life: The material composition remains basically unchanged; the strainer is just clogged, so enabling the bypass flow should also help increase it. Our tower has two reboilers; by switching from one to the other, the flow rate at the same valve setting drops from 3000 to 800
Reply to 4# wdh2010: We have also activated the bypass, but the flow rate still doesn’t increase