METHOD AND INSTALLATION FOR HEAT RECOVERY IN FLUIDISED BED GRANULATION
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United States of America
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Jan 18, 2018
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Jan 18, 2018
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A process for producing granulated fertilizer by fluidized-bed granulation in a fluidized-bed granulator may involve drawing in and heating air used for fluidization in the fluidized bed via a conduit before entry into the fluidized-bed granulator. Hot exhaust air exiting the fluidized-bed granulator may be obtained, and a substream of the hot exhaust air may be recirculated and used for fluidization. Such recirculation creates the possibility of utilizing heat energy present in the exhaust air and decreasing heat energy necessary for heating the fresh air for fluidization. The recirculated air can be, for example, purified by way of a cyclone precipitator to separate off solid particles before the purified exhaust air is combined with the fresh air.
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