What is the purpose of the connecting pipe outside the condensate collection tank of a falling film evaporator?
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This post was last edited by tenchel on 2022-8-9 at 16:39. I would like to ask fellow enthusiasts: there are two connecting pipes along with valves outside the condensate receiver tank of the falling film evaporator. I’m not sure what function these two valves serve. I have a single-effect cyclic vacuum evaporator; when both valves on these pipes are closed and the vent valve of the condensate receiver tank is opened, the pressure in the distillation system can be maintained at a vacuum level, and the condensate can be discharged at atmospheric pressure. After adding the material, close the vent valve; opening either of these two valves seems to allow connection to the vacuum system. I’m not sure which part of the vacuum system each of these valves controls, or what other functions they may have. I’d appreciate some advice, thank you!
Such devices all come with instruction manuals and flow diagrams, making them easy to understand at a glance.
To be honest with you, it’s frustrating to have just a process flow diagram without any after-sales support.
Sure, it’s fine as long as there’s a process flow diagram; send it over and we’ll be able to see what’s going on.
This bottom section should be a steam buffer tank, with the long pipe serving to regulate the amount of steam to achieve the desired temperature in the evaporator. The short tube serves as a reflux valve for the condensate. Since the material properties and other parameters are unknown, only guesses can be made; this is for reference only.
I’ll give it another try in the app. Since I’m not familiar with the internal structure of the device, I can’t take it apart to check either. Thank you!
Use an endoscope to extend it from the shell-side cooling medium inlet to check whether the long tube passes through the shell-side partition at the bottom of the coiled tubes. If so, the long pipe is used to drain the cooling medium in the shell side; that is, during shutdown, the process fluid condensate in the bottom receiver tank is first drained ； Then open the valve on the long pipe to drain all of the shell-side cooling medium from the utility supply into the receiving tank, and finally discharge it to an appropriate location through the pipeline at the bottom of the tank (it is possible to check whether this pipeline has two outlets) ； In the diagram, the connecting pipe between the shell-side tube chambers and the coiled-tube chambers can also serve as a drainage pipe for draining liquid from the upper tube chambers when they are shut down. Therefore, such speculation exists for reference only.
Be sure to follow the operation instructions for reference.