For a vacuum distillation unit running at 60 mm Hg with a barometric condenser, the optimal location to position the receiver vacuum drum is___________________?
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Answer: A. At ground level
Explanation
A barometric condenser utilizes a long tailpipe to maintain vacuum without mechanical liquid pumps. The hydrostatic head of the water column inside the barometric leg supports the vacuum safely. Therefore, the receiver vacuum drum can be positioned conveniently at ground level for operators. Barometric condensers rely on gravity drainage of condensate and cooling water through a vertical pipe. A vertical height of approximately 10 meters is sufficient to support a complete vacuum via water head. Vacuum distillation units operate at reduced pressures to lower the boiling points of heat-sensitive components.
Locating heavy receiver drums at ground level simplifies maintenance access and structural support requirements. Chemical processing plants use barometric legs extensively to reduce pump capital and operating costs. Proper positioning prevents flooding and maintains stable operating pressures in vacuum fractionation systems. Elevating the receiver drum by two meters is unnecessary because the barometric leg provides full head. Placing the vessel five meters above ground provides inadequate hydrostatic height for full vacuum operation. Ten meters of elevation is required for the condenser tailpipe itself, not for the receiver drum.
- Subject
- Engineering
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- Chemical Engineering
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