Treatment for waste water of brown coal dehydration |
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| 申请号 | JP4895181 | 申请日 | 1981-03-31 | 公开(公告)号 | JPS57162691A | 公开(公告)日 | 1982-10-06 |
| 申请人 | Electric Power Dev Co Ltd; Kawasaki Heavy Ind Ltd; | 发明人 | NAKABAYASHI KIYOUSHI; MATSUURA HIKOO; KURIHARA MICHIO; KAMEI TAKAO; NAKAMURA AKIRA; KOMAI KEIICHI; SHIMOTAMARI AKIRA; WAKABAYASHI TAKESHI; | ||||
| 摘要 | PURPOSE: To treat the waste water produced by dehydration of brown coal through non-evaporation heating economically by purifying said waste water by utilizing the adsorbing power of the excess grained coal which is ground and classified. CONSTITUTION: Raw material brown coal is charged through a conveying route 1 into a primary sieve 3 of a grinding and classifying device 2. Coarse grains are crushed with a crusher 4 and are charged together with middle and small grains into a secondary sieve 5, by which they are separated to screened coal suited for dehydration through non-evaporation heating and grained coal. The former is dehydrated with a dehydrator 7 by non-evaporation heating to product of dehydrated coal. The waste water produced in the device 7 is introduced into an adsorption tank 11, in which it is mixed with the excess grained coal charged from the device 2, and mainly the COD, phenol, etc. in the waste water are adsorbed away. The mixture of the grained coal and water subjected to the adsorption treatment is withdrawn with a sand pump 13, and is subjected to solid- liquid sepn. with a filter 14 and a centrifugal separator 15. The supernatant is further purified with an aeration treatment device 16 and is then released. The separated grained coal is used as a heat source for a boiler 20. COPYRIGHT: (C)1982,JPO&Japio |
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