Odor control and heat recovery in wood pulping process

• US 3,183,145 A
• Filed: 06/22/1962
• Issued: 05/11/1965
• Est. Priority Date: 06/22/1962
• Status: Expired due to Term

• Current Assignee: Theron T. Collins Jr
• Original Assignee: Theron T. Collins Jr
• Inventors: Collins, Theron T. Jr.
• Application Number:
  US04/204,541
• Time in Patent Office: 1,054 Days
• US Class Current: 162/47
• CPC Class Codes: D21C 11/06 Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
• CPC Class Codes: Y10S 159/04 Foam
• CPC Class Codes: Y10S 159/18 Accumulator

Claims

10. IN THE SULPHATE PROCESS, THE METHOD OF TREATING HOT SULPHUR DIOXIDE CONTAINING WATER VAPOR LADEN GASES AND EVAPORATOR CONDENSATE CONTAINING NORMALLY GASEOUS ODORIFEROUS SULPHUR COMPOUNDS, COMPRISING PASSING SAID HOT GASES AND SAID CONDENSATE INTO INTIMATE CONTACT TO CONDENSE WATER VAPOR FROM SAID GASES, TO STRIP THE NORMALLY GASEOUS ODORIFEROUS SULPHUR COMPOUNDS THEREFROM AND TO TRANSFORM A PORTION THEREOF TO INNOCUOUS SUBSTANCES, CHLORINATING THE RESIDUAL ODORIFEROUS SULPHUR COMPOUNDS RETAINED IN THE GASES EVELVED FROM THE CONDENSING AND STRIPPING STEP, COOLING THE CONDENSED WATER VAPOR AND STRIPPED CONDENSATE, PASSING AIR THROUGH THE COOLED LIQUID FROM THE LAST STEP TO STRIP RESIDUAL ODORIFEROUS GASES THEREFROM, AND PASSING THE STRIPPED RESIDUAL ODORIFEROUS GASES TO SAID CONDENSING AND STRIPPING STEP.