For vacuum dehydration in reaction vessels, which vacuum pump is more suitable?
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This post was last edited by Desert Fish on 2015-11-20 at 16:39. We are currently using 2 3000L kneaders; vacuum dehydration is required in the later stages of the reaction, and the amount of water involved is not large (dehydration has already been carried out using negative pressure from fans in the early stages). What kind of vacuum pump would be suitable for this purpose? I have considered water jet pump sets (those made of PP plastic) as well as water ring vacuum pumps. I would appreciate suggestions from those of you who have experience in this area.
Either one will work fine, as long as the displacement is chosen appropriately. The issue is whether the exhaust gas from the vacuum pump contains organic substances or small solid particles, which can have an adverse impact on the environment.
Water ring pumps can be used for vacuuming systems that contain fine particles! @
Water jet pumps are better; they can also achieve a high vacuum. It occupies less space, has a relatively small motor setup, and is energy-efficient.
If it contains a large amount of water vapor, such as when the proportion of water vapor exceeds 80%, use a water jet pump! If it is less than 50%, use a water ring pump. Between the two, either one will do.
We now use reciprocating oil-free vertical vacuum pumps; at least this eliminates the cost associated with treating wastewater from water ring vacuum pumps
Jet pumps have a high initial vacuum level; during operation, this vacuum level gradually decreases. Especially in summer, the vacuum level is very unstable, and the water consumption is high. Water ring pumps also suffer from such problems. Therefore, it is recommended to engage in technical discussions with vacuum pump manufacturers. If dry screw vacuum pumps can be used, that would be ideal, as these pumps operate without oil or water, representing a trend for the future and also contributing to environmental protection
Ultimately, it depends on the level of vacuum you need to achieve. For dehydration processes, water ring pumps are commonly used as they offer high efficiency; if a higher level of vacuum is required, rotary vane or water ring units can be chosen.
What level of vacuum do you require? If a very high level of vacuum is required, a dry vacuum pump can be used, with a gas-liquid separation tank installed in front of it. If it’s not high, the liquid ring is fine