Dehumidifying apparatus

A dehumidifying apparatus, comprising:

• a first air distribution assembly connected to a process air inlet for receiving process air from the process air inlet, and to a regeneration air outlet for exhausting regeneration air via a vacuum unit;
• a second air distribution assembly connected to a process air outlet for delivering process air to the process air outlet, and to a regeneration air inlet for receiving regeneration air;
• at least three stationary modules connected in parallel between the first air distribution assembly and the second air distribution assembly;
• each module containing a desiccant and having a first aperture for connecting to the first air distribution assembly, and an opposite second aperture for connecting to the second air distribution assembly;
• a heater associated with each of said at least three stationary modules;
• the first and second air distribution assemblies configured to cycle between a number of discrete positions equal to the number of modules;
• in each position, the first and second air distribution assemblies configured to establish:
• a regeneration air flow from the regeneration air inlet to the regeneration air outlet via said heater and, in sequence:
• the second air distribution assembly, the second aperture of one module, the first aperture of the one module, and the first air distribution assembly;
• and
• a plurality of process air flows from the process air inlet to the process air outlet via, in sequence:
• the first air distribution assembly, the first aperture of each remaining module, the second aperture of each remaining module, and the second air distribution assembly.