How do you know it's ready to go? From everything I've read it's pretty tough to completely dry the glycols that quickly. Sure it feels try to the touch, but I can't imagine using a hair dryer on a large canvas can guarantee a thorough drying.
I didn't say it would be easy. And I was careful not to encourage anyone to do it. I was just answering the OP's question.
That said, what works for me is to put one hand on the back side of the print, and run the hair dryer with the other hand on the other side (keep the hair dryer very close to the print [without hitting it] and move it *slowly* back and forth over a small area -- slowly so the print actually heats up, which is the point). The hand on the back side of the print can feel the temperature differences fairly well. First thing that happens is the back side actually gets a little colder. It'll feel damp to the touch too (and no, that's not water -- feels damp when you do this days after printing when the water is long gone). While this is going on you'll smell the glycols and glycerins coming off the print. Then you'll feel it start it warm up -- the temperature actually ramps up. When most of the glycols and glycerins are gone, it's almost like a step function increase in temperature on the back of the print, and the dampness is completely gone. Then you move to the next spot and repeat. You keep repeating until done.
The process might take half an hour or more for a really big canvas. But if you are in a serious hurry, this is one way to get the job done. Painful, boring, and a questionable use of energy (and the resulting generation of green house gases), all true. But effective.
An alternative might be hanging the print in full sun for an hour or so with a small oscillating fan blowing over it. All you need to do is give the glycols and glycerins enough energy to make the phase change from liquid to vapor, and move them away from the print when they make that leap so they don't condense back onto the print when they cool off. The "ultimate" way is probably something like a silk screener's tunnel dryer if you have the cash and the physical room for one.