Treatment for ash |
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| 申请号 | JP20731381 | 申请日 | 1981-12-22 | 公开(公告)号 | JPS58109127A | 公开(公告)日 | 1983-06-29 |
| 申请人 | Kawasaki Heavy Ind Ltd; | 发明人 | ITOU HAYAMIZU; NAGAI CHIAKI; | ||||
| 摘要 | PURPOSE: To make effective use of coal ashes by adding water and a binder to the lime ashes captured, by a dust precipitator, adding surfactants thereto according to need, forming coarse grains contg. much coal, separating the same from fine powder contg. ashes at a high rate and recovering and using the separated coarse grains as fuel. CONSTITUTION: The coal ashes which are captured by an electrical dust precipitator 2 provided to the waste gas duct of a boiler firing finely grained coal and contains black coal ashes consisting essentially of the unburned carbon obtained in said precipitator are introduced into a separating tank 5 for unburned components, and water and heavy oil as a binder are added to the ashes and both are agitated and mixed to form coarse garins of the unburned components and the heavy oil, then the coarse grains and the fine grains of ashes are separated with a classifier 6. After the coarse grains are dehydrated with a dehydrator 7, the grains are supplied to a boiler 1 for use as fuel. The fine powder is discarded as it is or after said powder is dehydrated in a solid-liquid separator 8, the solids are utilized for raw materials for cement, etc. Surfactants are added in some cases into the tank 5 for the purpose of accelerating granulation. The separated water obtained in the dehydrator 7 and the separator 8 is removed of ammonia according to need and is then reused for control of slurry. COPYRIGHT: (C)1983,JPO&Japio |
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