In the story I'm writing, my modern-day characters have the need to produce a great quantity of bricks in a relatively primitive setting and society, equivalent to ancient Sumeria. They have access to willow trees, which are a fast-growing species of tree that produces useable firewood relatively quickly, within five years, for a project that is expected to take twenty years or more.
It is recommended to season willow logs for at least 12 months before use as firewood, however, I am considering measures to dry this wood more quickly.
Considering that large quantities of fired clay bricks are required, I am considering something similar to a dragon kiln which can fire a large quantity of ceramics simultaneously.
In order to kiln dry timber, lower temperatures are required than that required to fire ceramics. So, I was considering adding a separate outer layer to the dragon kiln, so that air would be drawn down from beside the chimney of the upper kiln and heated as it travelled down through a series of seasoning kilns beside and sharing a wall with the ceramic kilns. Once the warmed air had passed through the timber kilns, it would then be fed into the burning timber that heats the ceramic kilns, which produce the draft necessary to draw in air at the top of the kiln chain.
Alternatively, cold air in the drying kilns could be heated by the ceramic kilns and pass upwards through the chain of dryink kilns. Either way, the wood drying kilns would operate at around 100°C
Is this a feasible method of kiln drying willow timber for use as firewood, or should I just have my characters put up with year-long or more natural seasoning times?