| 摘要 |
PCT No. PCT/DE78/00042 Sec. 371 Date Sept. 10, 1979 Sec. 102(e) Date Sept. 10, 1979 PCT Filed Dec. 22, 1978 PCT Pub. No. WO79/00492 PCT Pub. Date July 26, 1979 To fire a tunnel kiln with coal, the coal is stored in a preferably airtight bunker, and transported, by means of airtightly enclosed conveyor belts or chains connected to the bunker, to coal injectors operating as burners, which are provided in and distributed over the width of the firing zone of the kiln and connected to an air supply line, wherefrom compressed air is fed intermittently into the injectors, to blow in the coal which is there placed in a metered amount. Each firing place of a kiln is thus formed by a coal injector and the injectors are arranged in rows over the width of the firing zone of the kiln and each row is connected, respectively, by means of an associated conveyor belt and an air distributing pipe, to a conveyor belt extending in the longitudinal direction of the kiln and connecting to the coal bunker, and to a main compressed air line preferably extending parallel thereto. The coal injectors comprise a vertical coal feed tube which is connected to the conveyor belt and is open at its bottom, a receiving plate which is disposed below and spaced from the bottom end of the feed tube, and a casing surrounding the plate and the bottom end of the feed tube and connected to the compressed-air supply line and, through a blow or mixing pipe or directly, to the firing place.
|
