With all due respect, burning wood or coal aboard ship has been done for hundreds of years. Wood and charcoal stoves are available from reputable makers for even small vessels.
Solid fuel marine stoves and heaters that are designed to burn when the vessel is in motion have an enclosed firebox that contains the burning fuel.
Solid fuel and charcoal have a respectable heating value, and it is at least arguable that a piece of firewood that can be readily grasped and placed in a fireplace is actually less of a fire or explosion hazard than either liquid or gas fuel.
I have no opinion to offer regarding dust explosions, since I have never heard of one in this context.
BTW, most solid fuel heaters and fireplaces dissipate their heat output by natural convection and radiation and, properly located, can certainly operate without the assistance of a fan.
If you like solid fuel heat and can handle the high (?) price of the fuel, there is no rational reason that you ought not have it.