Process and apparatus for simultaneously grinding and drying material to be ground containing moist cellulose ether
AssigneeClariant GmbH
InventorsReinhard Doenges, Manfred Sponheimer, Guenther Welt, Manfred Ziegelmayer
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Abstract
In the process and the apparatus, a gas stream is divided into three partial gas streams. The first partial gas stream transports the material to be ground into the grinding and friction space of a mill (26), while the second partial gas stream runs around the friction space in the mill. The third partial gas stream is connected to the output side of the mill and takes up the reduced and dried ground material, transported out of the mill by the first and second partial gas streams, in order to transport it to a separator (30).
Claims10
A process for simultaneously grinding and drying a material to be ground containing moist cellulose ether in a mill having a mill housing and a screening cage and using an initial gas stream that is divided into three partial gas streams in the process, comprising the steps of
- a) dividing a gas stream into three partial gas streams,
- b) transporting the material to be ground by a first partial gas stream into the mill for reducing the material to be ground,
- c) introducing a second partial gas stream tangentially into the mill in the space between the mill housing and the screening cage wherein the first and second partial gas streams are combined in the mill and,
- d) reducing and drying the ground material in the mill,
- e) taking up and transporting the reduced and dried ground material out of the mill by the combined first and second partial gas streams,
- f) introducing a third partial gas stream to combine with the first and second partial gas streams to transport the reduced and dried ground material,
- g) separating the ground material from the combined three partial gas streams.
Dependencies are inferred from the claim text.