Equipment layout issues for the forced-circulation multi-effect evaporation process?
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For the desalination in the wastewater pretreatment process of our company, a forced-circulation four-effect evaporation system is planned to be used; it will be designed by an environmental protection company. The liquid feed for the evaporator is sent to the heater via a forced-circulation pump for heating, and then it enters the evaporator where gas and liquid are separated. Both the heater and the evaporator have a height of around 8 meters. During the design, the evaporator was placed above the heater, and the entire building was designed to be quite tall. Dear experts, is it possible to arrange the evaporator and heater side by side in order to reduce the height of the building and make the installation more compact? It should be possible.
This places high demands on the design, the circulation pump, and operation, making it easy to encounter problems
Do you mean the process or the layout? Thank you!
I think it should be possible, because there are two propylene columns for this purpose: one is the crude propylene column and the other is the refined propylene column. I’m not very knowledgeable, but I just think it works, hehe
We can discuss this in detail; I specialize in evaporator design. QQ: 326598981
The design is logical: the evaporator is located above the heater, which facilitates the circulation of the liquid and improves heat transfer. However, factors such as pump cavitation and suction lift need to be taken into consideration. This post was last edited by haibao on 2008-1-19 at 16:13
No, it’s not possible because there is the issue of overcoming vacuum; factors such as the vacuum level of your equipment and its height above the ground need to be considered. For detailed discussions, contact me on QQ: 525420229.
Hey guys on floors 4 and 6, can’t we communicate here? ? ? Our forum is really deserted. I’m so angry I can’t even speak!
I was wrong; it’s the 5th and 7th floors!
The main issue is related to vacuum conditions; when the two are placed side by side, the vacuum level does not meet the required standards, and the resistance to circulation increases, making it unfeasible
Why is there a vacuum level issue?
Could the original poster post a layout diagram? I’m facing a similar problem right now.
From a process perspective, it is not appropriate to arrange the heater and evaporator side by side in order to reduce the installation height, for two reasons: first, the vacuum level issues mentioned earlier may arise. II. Gas-liquid separation in the evaporation chamber can be difficult: since the heating chamber and the evaporation chamber are arranged side by side, for the liquid level in the evaporation chamber to be at the same level as that in the heating chamber, the space available for gas-liquid separation there is very limited; as a result, many liquid droplets get carried away, leading to material loss or incomplete evaporation and separation.
I have built 2 sets of such devices, both arranged in this way, for the reasons mentioned above. And this arrangement saves space; land is very expensive these days