Process and plant for heat recovery in fluidized-bed granulation

The present invention relates to a process for producing granulated fertilizer by fluidized-bed granulation in a fluidized-bed granulator, in which the air used for fluidization in the fluidized bed is drawn in via a conduit and heated before entry into the fluidized-bed granulator, with hot exhaust...

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Bibliographic Details
Main Authors MATHIAK, JENS, BANIK, PETER
Format Patent
LanguageChinese
English
Published 16.08.2018
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:The present invention relates to a process for producing granulated fertilizer by fluidized-bed granulation in a fluidized-bed granulator, in which the air used for fluidization in the fluidized bed is drawn in via a conduit and heated before entry into the fluidized-bed granulator, with hot exhaust air exiting from the fluidized-bed granulator being obtained in the process and according to the invention at least one substream of the hot exhaust air is recirculated and used for fluidization. This creates the possibility of utilizing the heat energy present in the exhaust air and decreasing the heat energy necessary for heating the fresh air for fluidization. The recirculated air can, for example, be purified by means of a cyclone precipitator in order to separate off solid particles before the purified exhaust air is combined with the fresh air.
Bibliography:Application Number: TW20180101712