Use a real good filter on the mister. Won't stop lime but if the sprayers are soft, a squeeze etc will loossen them and they will fall out.
They had mister system at Relative's Saturday fro wife's and mine birthdays.
It was a...dry... 110 degrees on the patio. you could watch the miss vanish at about 3 ft from the floor. It really helped cool it down and the occasional drifting mist felt good. Your clothes got sprayed they dried in a second or two and ha a great cooling effect.