A radial U-flow adsorption unit for air purification in a TSA process, having a gas outlet at one end and at least one gas inlet at the side, preferably at the same end of the unit as the gas outlet. The simpler design of the unit facilitates manufacture, installation and transport, and reduces the
A radial U-flow adsorption unit for air purification in a TSA process, having a gas outlet at one end and at least one gas inlet at the side, preferably at the same end of the unit as the gas outlet. The simpler design of the unit facilitates manufacture, installation and transport, and reduces the capital and operating costs.
대표청구항▼
1. A radial U-flow adsorption unit for purifying air by removal of at least one contaminant selected from the group consisting of water, carbon dioxide, hydrocarbons and NOx, said unit comprising: an outer tubular side wall having a longitudinal axis and comprising a top end and a bottom end opposit
1. A radial U-flow adsorption unit for purifying air by removal of at least one contaminant selected from the group consisting of water, carbon dioxide, hydrocarbons and NOx, said unit comprising: an outer tubular side wall having a longitudinal axis and comprising a top end and a bottom end opposite said top end, said top and bottom ends being closed by top and bottom end walls respectively;an elongated annular bed comprising at least one selectively adsorbent material, said annular bed being located co-axially within said outer tubular side wall thereby defining a first annular space between said side wall and said annular bed, said annular bed defining a central channel in fluid communication with said first annular space through said annular bed;an impermeable annular skirt supporting said annular bed on said bottom end wall, said annular skirt being located co-axially within said outer tubular side wall thereby defining a second annular space between said outer tubular side wall and said annular skirt, said second annular space being in fluid communication with said first annular space;at least one gas inlet located in said outer tubular side wall at said bottom end and in fluid communication with said first annular space through said second annular space; anda gas outlet located in said bottom wall of said unit and in fluid communication with said central channel. 2. The adsorption unit according to claim 1, wherein said unit comprises a single gas inlet. 3. The adsorption unit according to claim 1, wherein said unit comprises a plurality of gas inlets. 4. The adsorption unit according to claim 3, wherein said gas inlets are spaced circumferentially around said outer tubular side wall. 5. The adsorption unit according to claim 4, wherein said gas inlets are evenly spaced. 6. The adsorption unit according to claim 4, wherein each gas inlet is located at a distance from said annular bed, said distance being equal for each gas inlet. 7. The adsorption unit according to claim 3, wherein said unit comprises a first gas inlet and a second gas inlet. 8. The adsorption unit according to claim 7, wherein said second gas inlet is located opposite said first gas inlet. 9. The adsorption unit according to claim 1, wherein said at least one gas inlet is orientated radially to said longitudinal axis. 10. The adsorption unit according to claim 1, wherein said unit comprises no baffles. 11. The adsorption unit according to claim 1, wherein said unit comprises at least one baffle for reducing gas flow maldistribution in said first annular space. 12. The adsorption unit according to claim 11, wherein said at least one baffle is selected from the group consisting of annular baffles, longitudinal baffles, frustoconical baffles, cylindrical baffles and gas inlet baffles. 13. The adsorption unit according to claim 11, wherein said baffle or, where there is more than one baffle, at least one of said baffles is perforated. 14. The adsorption unit according to claim 13, wherein said perforated baffle has an open area from about 10% to about 60%. 15. The adsorption unit according to claim 1, wherein said unit comprises at least one annular baffle located co-axially within said unit between said at least one gas inlet and said annular bed, said at least one annular baffle extending at least partially across said second annular space. 16. The adsorption unit according to claim 15, wherein said annular baffle or, where there is more than one annular baffle, at least one of said annular baffles extends from said outer tubular side wall. 17. The adsorption unit according to claim 15, wherein said annular baffle or, where there is more than one annular baffle, at least one of said annular baffles extends from said annular skirt. 18. The adsorption unit according to claim 15, wherein said annular baffle or, where there is more than one annular baffle, at least of said annular baffles is perforated and extends at least substantially across said second annular space. 19. The adsorption unit according to claim 1, wherein said unit comprises a first annular baffle extending radially from said annular skirt between said at least one gas inlet and said annular bed, and a second annular baffle extending radially from said outer tubular side wall between said first annular baffle and said annular bed, said baffles located co-axially within said unit and extending partially across said second annular space. 20. The adsorption unit according to claim 1, wherein said unit comprises at least one longitudinal baffle mounted in said unit parallel to said longitudinal axis and extending at least partially across said first annular space. 21. The adsorption unit according to claim 20, wherein said unit comprises a plurality of said longitudinal baffles. 22. The adsorption unit according to claim 21, wherein said longitudinal baffles are spaced circumferentially within said unit. 23. The adsorption unit according to claim 22, wherein said longitudinal baffles are evenly spaced. 24. The adsorption unit according to claim 20, wherein said at least one longitudinal baffle extends from said outer tubular side wall. 25. The adsorption unit according to claim 1, wherein said unit comprises at least one longitudinal baffle mounted in said unit parallel to said longitudinal axis and extending at least partially across said second annular space. 26. The adsorption unit according to claim 25, wherein said unit comprises a plurality of said longitudinal baffles. 27. The adsorption unit according to claim 26, wherein said longitudinal baffles are spaced circumferentially within said unit. 28. The adsorption unit according to claim 27, wherein said longitudinal baffles are evenly spaced. 29. The adsorption unit according to claim 25, wherein said longitudinal baffle or, where there are more than one of said longitudinal baffles, at least one of said longitudinal baffles extends from said outer tubular side wall. 30. The adsorption unit according to claim 25, wherein said longitudinal baffle or, where there are more than one longitudinal baffles, at least one of said longitudinal baffles extends from said annular skirt. 31. The adsorption unit according to claim 1, wherein said unit comprises a frustoconical baffle located co-axially in said second annular space, said frustoconical baffle being positioned in front of and spaced apart from said at least one gas inlet. 32. The adsorption unit according to claim 31, wherein said frustoconical baffle comprises, with respect to said annular bed, a proximal end and a distal end, said frustoconical baffle being mounted circumferentially at said proximal end on said outer tubular side wall. 33. The adsorption unit according to claim 32, wherein said proximal end of said frustoconical baffle comprises an annular flange. 34. The adsorption unit according to claim 33, wherein said annular flange is perforated. 35. The adsorption unit according to claim 31, wherein said frustoconical baffle is inverted. 36. The adsorption unit according to claim 1, wherein said gas inlet comprises, with respect to said annular bed, a proximal side and a distal side, said unit comprising a gas inlet baffle located at said proximal side of said gas inlet and extending across at least a portion of said second annular space. 37. The adsorption unit according to claim 36, wherein said gas inlet baffle has an at least substantially U-shaped cross-section. 38. The adsorption unit according to claim 1, wherein said unit comprises a cylindrical baffle located co-axially in said second annular space, said cylindrical baffle being positioned in front of and spaced apart from said at least one gas inlet. 39. The adsorption unit according to claim 38, wherein said cylindrical baffle comprises, with respect to said annular bed, a proximal end and a distal end, said proximal end comprising an annular flange mounted circumferentially on said annular skirt. 40. The adsorption unit according to claim 39, wherein said annular flange is perforated. 41. The adsorption unit according to claim 39, wherein said cylindrical baffle comprising at least one opening, said at least one opening being located opposite said at least one gas inlet. 42. The adsorption unit according to claim 41, wherein said at least one gas inlet comprises a conduit in fluid communication with said respective opening. 43. The adsorption unit according to claim 42, wherein said conduit comprises a wall, at least a portion of said wall being perforated. 44. The adsorption unit according to claim 1, wherein said unit is pressurizable. 45. The adsorption unit according to claim 1, wherein said unit is rated for operation at a pressure of at least about 3 bar. 46. The adsorption unit according to claim 45, wherein said unit is rated for operation at a pressure of up to 40 bar. 47. The adsorption unit according to claim 46, wherein said outer tubular side wall and said end walls comprise carbon steel and have a thickness of no more than 38 mm.
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