Rotary bed dehumidification system and method with control of condensation in recirculating loop

A rotary sorption bed system, comprising:

• a rotating sorbent mass of a regenerable sorbent material, in a cycle of operation, a given volume of the sorbent mass sequentially passing through at least first, second, third, and fourth zones, before returning to the first zone;
• a process fluid stream directed through the first zone;
• a regeneration fluid stream directed through the third zone;
• a recycled fluid stream that recirculates in a closed loop independent of the process fluid stream and the regeneration fluid stream through the second and fourth zones;
• a sensor configured to measure at least two parameters in the recycled fluid stream, the at least two parameters including the dry bulb temperature and the dew point of the recycled fluid stream;
• and
• a controller configured to control the recycled fluid stream based on the measured at least two parameters, wherein
• the controller controls a flow rate of the recycled fluid stream based on a comparison of the dry bulb temperature and the dewpoint of the recycled fluid stream.

A method of reducing the sorbate concentration of a process fluid stream using a sorption bed system comprising a rotating mass of a regenerable sorbent material, the method comprising the steps of:

• rotating the sorbent mass so that, in a cycle of operation, a given volume of the sorbent mass sequentially passes through a process zone, a regeneration zone, and a third zone disposed between the process zone and the regeneration zone, before returning to the process zone;
• passing a first fluid stream through the sorbent mass in the process zone;
• passing a second fluid stream through the sorbent mass in the third zone and then through the sorbent mass in the regeneration zone;
• monitoring at least two parameters in the second fluid stream, the at least two parameters including the dry bulb temperature and the dew point of the second fluid stream;
• and
• controlling the second fluid stream based on the at least two parameters, wherein
• the controlling step controls a flow rate of the second fluid stream based on a comparison of the dry bulb temperature and the dewpoint of the second fluid stream.

A rotary sorption bed system, comprising:

• a rotating sorbent mass of a regenerable sorbent material, in a cycle of operation, a given volume of the sorbent mass sequentially passing through a process zone, a regeneration zone, and a third zone disposed between the process zone and the regeneration zone, before returning to the process zone;
• a first fluid stream directed through the process zone;
• a second fluid stream directed through the third zone and then through the regeneration zone;
• a sensor configured to measure at least two parameters in the second fluid stream, the at least two parameters including the dry bulb temperature and the dew point of the second fluid stream;
• and
• a controller configured to control the second fluid stream based on the measured at least two parameters, wherein
• the controller controls a flow rate of the second fluid stream based on a comparison of the dry bulb temperature and the dewpoint of the second fluid stream.