The bottom temperature of the acidic water stripping tower fails to rise
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Our plant uses a single-tower, low-pressure full-extraction system for the acid water stripping process; the heat source is steam at 1.0 MPa, which is used to heat the reboiler. Currently, the steam pressure in the pipeline is 0.5 MPa, and the temperature at the bottom of the tower is around 125°C. However, over the past two days, with the steam pressure remaining unchanged, the temperature at the bottom of the tower has been fluctuating between 100–120°C. I would appreciate it if experts in this field could help me figure out what’s going on
Is the steam pressure in the pipeline system too low?
Is the pressure at the top of the stripper still 0.5 MPa? The bottom temperature corresponds to the top pressure; as the pressure decreases, the temperature also drops. The condensate discharge volume from the reboiler; if the steam consumption decreases, it indicates poor heat exchange efficiency – check the condensate pipelines and the drainage condition.
What is the set pressure of your stripping tower? Temperature is proportional to pressure; take a look at the pressure at the top of the tower.
What is the processing capacity? Is it due to a low feed rate or the reversal of the trays, which results in insufficient material entering the reboiler and thus causes the reboiler to burn out and fail to reach the required temperature?
Could it be that the reboiler is burning out due to lack of fluid? Is the start-up circulation line open?
I would like to ask: what is the processing capacity of your equipment? Are there any adjustments being made currently? Can the steam pressure be increased? What is the steam temperature?
Xiao Cui. . There are many reasons. . The liquid level fluctuations at the bottom of your tower, and the pressure on the steam side. The pressure in your tower, as well as the amount of feed you use, will all affect the temperature at the bottom of the tower.
Fluctuations in the condensate on the rear side can also affect steam pressure fluctuations; it is necessary to check whether there is vaporization of the condensate or leakage from steam traps
The pressure at the top of the tower is less than 0.1 MPa, while the liquid level at the bottom of the tower is around 50%
It has been in operation for two months; everything was normal before. Now the liquid level is around 50%, and the feed rate hasn’t decreased. The temperature doesn’t rise suddenly, but it does increase once the start-up circulation line is activated. I can’t figure out the reason