| 摘要 |
1384925 Treating solid refuse UNION CARBIDE CORP 7 July 1972 [9 July 1971] 31915/72 Heading ClK [Also in Division C5] Solid refuse 13 is fed into the drying zone 2 of the shaft furnace 1 and then passed through the thermal decomposition zone 3 and the combustion and melting zone 4; gas 14, containing at least 40% by volume oxygen, is fed into the bottom of the furnace at a ratio of 0À15-0À28 parts by weight oxygen per part of refuse. The gas 23 is produced at 180-500‹ F. and is scrubbed with water at 25 and dried in the condenser 26. A portion of the product gas 31, containing at least 50 volume per cent CO+H 2 and having a heating value of 200-350 B.T.U./ ft<SP>3</SP> at 70‹ F., can be burned to produce energy for separating oxygen from air by liquifaction to provide the gas 14. The effluent in the settling tank 28 below the scrubber 25 settles into an organic phase 29 which can be recycled to the furnace together with fly ash filtered from the aqueous layer 30. The refuse generally reaches a maximum temperature of 3000‹F. and can be cooled by quenching with water. The process is carried out at above atmospheric pressure and under conditions which leave metals in the metallic state or as oxides. |
