| 摘要 |
<p>921,006. Fertilizers. J. BINNS. Nov. 14, 1961, No. 40730/61. Class 111. Municipal domestic refuse is fermented to form compost after addition of water which has been raised in temperature by heat derived by incinerating a part of the refuse. The optimum fermentation temperature is thereby reached in about 24 hours instead of 3 days, as when cold water is added to the refuse as described in Specification 919,955. The ashes from the incinerator which preferably contains a tins cleansing chamber, may be added to the refuse either before or after fermentation. As shown, municipal domestic refuse is deposited in pit 1, where 30-45% of its weight of hot water, e.g. at 140‹F., is sprayed on the refuse from pipe 2. The wet mass is then conveyed to fermentation cell 3, where the temperature is maintained at 150‹F. for 3 days by injection of air. The partially fermented material is then conveyed via hopper 4 and belt 5, past metal extractors 6 and 7 and screen 8, to a pulverising mill 9, whence the ground material (approx.# inch mesh) is transferred by belt 10 to cell 11, where fermentation is completed at 150‹F with the aid of water sprays and compressed air. The flue gases from incinerator 12 pass through a tins cleansing chamber 13 and then through water-heater 22, before escaping at chimney 19. Hot water is supplied via calorifier 21 and pump 24 to the pipe 2, to be sprayed on to the refuse. Swinging jib 14 loads and unloads tins from 13 and transfers ashes from trough 23 to hopper 4.</p> |
