Design of moisture content in raw coal prepared from pulverized coal
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During the production of pulverized coal, when the moisture content of the raw coal exceeds a certain level, this leads to an increased moisture content in the pulverized coal. What is generally the maximum allowable moisture content for raw coal in such designs?
Total moisture (Mt) is the sum of all inherent and extrinsic moisture in coal, and is often denoted as Mar. It is usually specified to be below 8%
Currently, the moisture content of brown coal gasification is over 30%, so a pre-drying system is added before it enters the powder production system.
The moisture content of raw coal is not determined by the downstream processes; it depends on the amount of raw coal available. The level of moisture in the raw coal determines the method to be used in the drying steps downstream
If the moisture content is too high, a pre-drying system needs to be added before the coal grinding process; if the moisture content is not high, coal can be ground directly