| 摘要 |
<p>1,175,384. Mixing apparatus; chemical contact apparatus. POTASSE & ENGRAIS CHIMIQUES SOC. ANON. 22 March, 1967 [25 March, 1966], No. 13502/67. Headings B1C and B1F. [Also in Division F4] In a method and apparatus for treating divided solid material with a reactive gas the wall of a rotary drum is divided into longitudinal strips to which the gas is fed in succession under the solid materials by a conventional rotary distributor as the drum revolves. The inner wall of each strip 1a, 1b, 1c is covered by a flexible overlapping membrane 6 of metal foil or plastics material secured at its leading edge, so acting as a valve for the admission to the drum of gas from an orifice 3 and preventing escape of the solids. In another arrangement, the membranes are secured on all four edges and have slits acting as valves, (see Figures 4 and 6, not shown). The apparatus may be used for treatment with ammonia in fertilizer manufacture, granulation and drying.</p> |
