发明名称 |
Process and apparatus for the drying of coal in power stations, especially for the drying of water-containing brown coal |
摘要 |
The object on which the invention is based is to afford a solution for the drying of coal in power stations, especially for the drying of water-containing brown coal, in which a proportionate coal combustion for the expulsion of coal moisture is dispensed with and, instead, smoke gas is used for this purpose within a temperature range in which acid dew points are crossed. This is achieved, according to the invention, in that a part stream of the raw fine coal is introduced into the smoke-gas cooler constructed from acid-resistant tube bundles, is heated by the smoke gas conveyed in countercurrent and is dried, the vapour occurring is discharged for the preheating of machine condensate and/or combustion air, and the vapour condensate obtained is used as a service-water substitute for the suspension treatment of the smoke-gas desulphurisation plant. The apparatus according to the invention for coal drying is characterised in that the smoke-gas cooler is arranged in a vertically guided portion of the smoke-gas conduit and is constructed from acid-resistant tube bundles known per se, which are guided on the one hand through a ceiling and on the other hand through a smoke-gas conduit bottom having an acid-resistant lining, there being [lacuna] above the smoke-gas conduit ceiling a coal feed connected to the acid-resistant tube bundles and having a vibrating and/or distributing grid and, below the smoke-gas conduit bottom, a collecting trough with an outlet device for the dried coal and with a conduit for the vapour discharge [lacuna] Original abstract incomplete. <IMAGE> |
申请公布号 |
DE4314010(A1) |
申请公布日期 |
1994.10.27 |
申请号 |
DE19934314010 |
申请日期 |
1993.04.23 |
申请人 |
VEAG VEREINIGTE ENERGIEWERKE AG, 12681 BERLIN, DE |
发明人 |
KROEDEL, BERND, DR.-ING., O-1152 BERLIN, DE;HINZE, BERNHARD, DIPL.-ING., O-3400 ZERBST, DE |
分类号 |
B01D53/00;F23J15/06;F23K1/04;F26B23/00;F26B23/02;F28D7/16 |
主分类号 |
B01D53/00 |
代理机构 |
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主权项 |
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地址 |
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