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US 10,914,519 B2Granted
Method for producing salts with a reduced water of crystallisation content
AssigneeAndritz Technology and Asset Management GmbH
InventorPaul Bernhard Kröhl
Life of this patent
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Abstract
The invention relates to a method for drying salts with a water of crystallisation content in convective apparatuses that can additionally be indirectly heated. The invention is primarily characterised in that the drying process takes place with a moisture content of the drying gas above a determined level. The gas surrounding the salt particles during the drying process therefore has a specific humidity. In this way, the rate of drying is positively influenced.
Claims10
A method for drying moist salts containing water of crystallisation, comprising
- drying the moist salts with a hot drying gas having a moisture content and temperature in a convective dryer whereby water is evaporated from the moist salts as the moist salts are dried and said evaporated water increases the moisture content of the drying gas in the dryer;
- discharging the moist drying gas from the dryer into a loop that fully returns the discharged drying gas into the dryer;
- in said loop, removing moisture from the discharged moist drying gas by condensation at a controllable condenser temperature;
- and
- maintaining an absolute moisture content of the drying gas in the dryer above a predefined moisture content value by controlling the moisture content of the drying gas that returns to the dryer through said loop, in dependence on controlling the temperature of a condenser.
2 more elements
Dependencies are inferred from the claim text.