초록 ▼

Disclosed are improved recirculating sorption bed systems, e.g., rotary beds, of the type consisting of a mass of sorbent material in which one section is in sorption duty while another section is being regenerated thermally. The sorption beds may be operated to reduce heat consumption while simulta

Disclosed are improved recirculating sorption bed systems, e.g., rotary beds, of the type consisting of a mass of sorbent material in which one section is in sorption duty while another section is being regenerated thermally. The sorption beds may be operated to reduce heat consumption while simultaneously producing a more sorbate-free product by utilizing sensible heat added to the bed during regeneration to supply a portion of the heat or desorption required to reactivate the bed. In one embodiment, the bed system features a recirculation loop which circulates fluid between a pair of regions interposed between the edge of the sorption duty and regeneration regions. In other embodiments the bed system includes means for directing a portion of the effluent generated in early stages of the sorption duty region to supplement hot regenerant in the regeneration region and/or includes means for directing effluent generated in early stages of the regeneration region to supplement the feed in late stages of the sorption duty region.

대표청구항 ▼

A method of operating a sorption bed system comprising a mass of thermally regenerable sorbent material, said method comprising the steps of: A. providing a course comprising a series of means for circulating fluid streams sequentially through a given volume of said mass; B. moving either said mass

A method of operating a sorption bed system comprising a mass of thermally regenerable sorbent material, said method comprising the steps of: A. providing a course comprising a series of means for circulating fluid streams sequentially through a given volume of said mass; B. moving either said mass or said course whereby said given volume sequentially passes, during a cycle, through first, second, third, and fourth regions; C. passing a fluid feed containing sorbate through sorbent material in said first region in a first direction to produce a fluid product of reduced sorbate concentration and to load sorbate onto sorbent material in said first region; D. passing a hot regenerant fluid through sorbent material in said third region countercurrent to said first direction to produce a fluid effluent comprising a sorbate-rich waste and to heat sorbent material in said third region; and E. recirculating fluid between sorbent material in said second region, cocurrent to said first direction, and sorbent material in said fourth region countercurrent to said first direction. A sorption bed system of improved efficiency comprising a mass of thermally regenerable sorbent material and a course comprising a series of means for directing fluid streams sequentially through a given volume of said mass of sorbent, said system comprising: first means for passing a fluid feed containing sorbate through a first region containing sorbent material to produce a fluid product of reduced sorbate concentration and to load sorbate onto the sorbent material in said first region; third means for passing, countercurrent to the direction of flow in said first means for passing, a hot regenerant fluid through a third region containing sorbent material to produce a fluid effluent comprising a sorbate-rich waste and to heat sorbent material in said third region; means for recirculating fluid between a second region containing sorbent material, said second region being disposed between said first and third regions, and a fourth region containing sorbent material, said fourth region being disposed between said third and first regions, the direction of recirculating in said second region being cocurrent to fluid passing through said first means for passing, and the direction of recirculating in said fourth region being cocurrent to fluid passing through said third means for passing; and means for moving one of said mass and said course whereby said given volume sequentially passes through said first, second, third, and fourth regions, and back to said first region.