Should a sulfur seal be installed at the bottom of the shell side of the process gas heat exchanger?

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In our sulfur process gas heat exchanger, the process gas coming out of the first converter enters the inlet of the tube side of the heat exchanger; it then exits from the tube side outlet and goes to the second cooler. The process gas exiting the second cooler enters the shell side of the heat exchanger, from where it proceeds to the second converter. The liquid sulfur in the tube side of the process gas heat exchanger enters the liquid sulfur tank through a sulfur seal device, while no such seal device is installed on the shell side of this heat exchanger. I believe that the process gas coming out of the secondary cooler contains some liquid sulfur, which then enters the shell side of the process gas heat exchanger. Over time, wouldn’t there be a significant amount of liquid sulfur accumulated in the shell side? But in the shell side of our process gas heat exchanger, there is no sulfur seal device connected to the liquid sulfur tank; I can’t understand why. Please, experts, explain it to me