Forced circulation heating process design, what is the purpose of adding a throttle valve to the circulation pipeline?
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Forced circulation heating process design, what is the purpose of adding a throttle valve to the circulation pipeline?
Under normal circumstances, it can be canceled as long as the design is reasonable.
How should we understand the green underlined content?
If a throttle valve is not added, the reboiler will boil, resulting in a gas-liquid two-phase flow, causing liquid shock in the reboiler.
Does it mean that the liquid phase is still in the reboiler outlet and will be regasified after passing through the throttle valve?
Yes, you can set up a throttle valve or a restrictor orifice plate
For some materials, once boiling gasification occurs in the reboiler, it will cause coking or scaling of the pipe wall on the side of the process material, or self-aggregation will be significantly accelerated. Therefore, in this case, the forced circulation pump and throttle valve are set up to prevent the material from boiling and vaporizing in the reboiler under the allowed temperature rise condition. The material heated by the reboiler returns to the tower after the throttle valve and then flashes out the gas phase.