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For discharging from the bottom of the tower, should it pass through the pump first or the heat exchanger first?

2022-02-28View Original

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For discharging from the bottom of the tower, should it pass through the pump first or the heat exchanger first? I’m just getting started with sulfur recovery units; in previous units, the material coming from the bottom of the tower was usually sent through a bottom pump before being transferred out of the unit via heat exchange. Why do the outputs from the stripping tower and the regeneration tower of the sulfur recovery unit both pass through heat exchangers before reaching the pumps? Could this lead to insufficient flow at the pump inlet due to scaling inside the heat exchanger?

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