What kind of equipment requires a return line?
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Yesterday I looked at a process flow diagram and noticed that some equipment had reflux pipelines while others did not. Could you tell me why? Are there any specific requirements? :)
Required by the manufacturing process, or for equipment protection
This return line serves primarily to protect the equipment. For example, a return line is required at the outlet of pumps when transporting lighter hydrocarbons, as such fluids tend to vaporize easily; it helps maintain a minimum flow rate, thereby protecting the pump and reducing cavitation
The so-called return pipeline should be the cross-line; this mainly depends on the equipment and process conditions
Generally, a reflux line is added in the pipeline behind the hydrocarbon pump and before the vaporization equipment, to ensure the safety of the equipment’s operation
Some devices, such as filtration equipment, also have a backflow mechanism to ensure that the filtrate meets the required standards!