H2-FH-27-D siemens flender Helical gear reducer H2

Flender/Flender Gear Units/Helical gear reducer H2

be absorbed by control unit with control valve {as still to be investigated. Further- more, the investigations have shown that ammonia is also released via naturally occurring ammonium com ounds in the raw material, this accumulating in the same manner as NH, loss between the preleater and the raw meal grindin plant during combined grindin and drying. Under direct operating conditions, partial degra Ation of the circulating material #en leads to NH, emissions. The pilot installations used with water-cooled probes are not suitable for continuous opera- tion. Suitable installations still have to be tested in this context.The magnitude which the circu- lating ammonia could reach in the kiln plant under continuous operatin conditions is also still uncertain, as are the effects it could have on the separatin efficiency oythe downstream gas purifier, on the service life of the filter internals and onthepurther use of the se arated dust. In this context, the circulating ammonium can arise from both the ammonium in ! raw material and from NH3 loss. The results of the investigations, particularly those concerning the loss of NH,, must, therefore, be reinforced by long-term studies. final assessment of the practical feasibility of the reduction measures is, therefore, not yet possible without detailed long-term measurements and tests of the technical facilities. 1 Duration: 0 0 8 - 3 1 8 0 VQ1 Subject: Studies of the behaviour of heavy metal compounds and the formation of coatings during cement production in rotary kiln with grate preheater Research centre: Portland-Zementwerk Wossingen GmbH Bruchsaler Strasse 5, 7 Walzbachtal Government sponsorship: DM 4,7 7 Sponsorship rqtio: 5 YO Duration: 0.0.8 - 3 . 2.8 0 ZH8 Subject: Studies of the circulation and emission behaviour of environmentally-relevant trace elements and their bond types in the cement production process Research centre: Portland-Zementwerk Wossingen GmbH Bruchsaler Strasse 5, -