P&ID schematic diagram and operation of water ring Roots vacuum pump units
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Does anyone have a system P&ID schematic diagram for water ring Roots vacuum pumps? I’d like to understand why, although the water ring vacuum pump is used as a pre-pump, it is said that the Roots booster pump cannot discharge directly to the atmosphere – what exactly does that mean? What are the specific sequence of operations and procedures?
This post was last edited by Qin Yong_bYEq5 on 2022-7-11 10:04; I don’t know how to upload pictures from my own computer
A Roots vacuum pump can be regarded as a mechanical booster pump; it is used to enhance the degree of vacuum and increase the pumping speed at the outlet. There is usually a ratio between the Roots pump and the pre-pump, such as 5:1.
Water ring pumps generally do not achieve high levels of vacuum. As pre-pumps, and considering the amount of wastewater generated, reciprocating pumps are now typically used as pre-pumps； Rotary vane vacuum pumps achieve high vacuum levels and are used as backstage pumps.
It cannot be discharged directly into the atmosphere because the pressure difference that a Roots pump can withstand is relatively low (usually a few thousand Pa), so it cannot be released directly into the air. With a pump in front, a certain degree of vacuum is created, and thus the pressure difference decreases. Add me as a friend and I’ll send you some materials and PID diagrams. Hope this can help you