Method and system for drying gas and reconcentrating the drying absorbent

• US 3,105,748 A
• Filed: 12/09/1957
• Issued: 10/01/1963
• Est. Priority Date: 12/09/1957
• Status: Expired due to Term

• Current Assignee: Willi Stahl
• Original Assignee: Willi Stahl
• Inventors: WILLI STAHL
• Application Number:
  US03/701,529
• Time in Patent Office: 2,122 Days
• US Class Current: 95/191
• CPC Class Codes: B01D 53/26 Drying gases or vapours
• CPC Class Codes: F24F 2003/144 by dehumidification only
• CPC Class Codes: F24F 2003/1458 using regenerators
• CPC Class Codes: F24F 3/1417 with liquid hygroscopic desiccants
• CPC Class Codes: Y10S 159/18 Accumulator

Claims

20. AN ABSORBER SYSTEM FOR DRYING GAS COMPRISING, AN ABSORBER IN WHICH A GAS STREAM IS DRIED BY A LIQUID ABSORBENT, A REBOILER RECEIVING THE RICH ABSORBENT FROM THE ABSORBER AND VAPORIZING A PORTION OF THE SOLUTE TO RECONCENTRATE THE ABSORBENT, A SUPERDRYER CONNECTED TO THE ABSORBENT OUTLET OF THE REBOILER AND FILMING THE ABSORBENT, CONDUIT MEANS BETWEEN THE ABSORBER AND THE SUPERDRYER TO SUPPLY A SMALL PORTION OF THE GAS FROM THE ABSORBER TO THE SUPERDRYER TO FURTHER RECONCENTRATE THE ABSORBENT, A REFLUX STRIPPER COLUMN RECEIVING VAPORS FROM THE REBOILER AND GAS FROM THE SUPERDRYER AND STRIPPING ABSORBENT THEREFROM, AND A HEAT EXCHANGER AT THE OUTLET OF THE REFLUX STRIPPER COLUMN CONDUCTING THE COLD, RICH ABSORBENT FROM THE ABSORBER IN INDIRECT HEAT EXCHANGE WITH THE GAS AND VAPORS FROM THE STRIPPER COLUMN TO CONDENSE A PORTION OF THE VAPORS FROM THE REFLUX STRIPPER COLUMN TO PROVIDE ADDITIONAL REFLUX LIQUID.

25. THE METHOD OF RECONCENTRATING A SOLUTION OF TRIETHYLENE GLYCOL AND WATER COMPRISING THE STEPS OF, HEATING THE SOLUTION TO RECONCENTRATE THE SOLUTION TO A CONCENTRATION OF AT LEAST APPROXIMATELY 98% BY WEIGHT TRIETHYLENE GLYCOL BY BOILING OFF VAPORS, SEPARATING SAID VAPORS FROM SAID LIQUID SOLUTION AND STRIPPING TRIETHYLENE VAPORS THEREFROM, CONDUCTING THE PARTIALLY RECONCENTRATED SOLUTON TO A SUBSEQUENT TREATING AREA, THEN SPREADING THE PARTIALLY RECONCENTRATED SOLUTION INTO MULTIPLE THIN FILMS AND INTIMATELY CONTACTING THE FILMED PARTIALLY RECONCENTRATED SOLUTION WITH A DRY TURBULENT GAS STREAM TO FURTHER RECONCENTRATE THE SOLUTION.