Okay, when DFD says 22's a pair, 13's a pair, etc. they are dispatching both the engine and the truck out of that station. Rather than repeat "Engine 22, Truck 22" they just shorten it to 22's a pair. As far as Battalions, there are 7, technically 8 in Denver. They call then District Chiefs (same things as a Batt. Chief). Here's a rundown of Co's and Chiefs.
Dist 2 (Downtown)
Station 1
-Engine 1, Tower 1, Chief 2, Underwater, Collapse, Trench Trailer. (Eng cross-staffs Underwater, Twr cross-staffs Trench/Collapse)
Station 3
-Eng 3
Station 4
-Tower 4
Station 6
-Eng 6, Hamer 1(Hazmat unit), Hamer 3 (Dump truck) (Eng 6's crew as also Hazmat Techs)
Station 11
-Eng 11, Rescue 1
Dist 3 (DU area)
Station 13
-Eng 13
Station 16
-Eng 16, Trk 16, Chief 3
Station 21
-Eng 21, Command Van (For the time being, new "super command van" coming online shortly, not sure where it's going)
Station 22
-Eng 22, Twr 22
Station 24
-Eng 24
Dist 4 (City Park/Hosptial Row/old Glendale)
Station 5
-Eng 5
Station 8
-Eng 8, Trk 8, Air/Light (Usually a light duty staffed unit)
Station 10
-Squirt 10, Decon (cross-staffed)
Station 15
-Eng 15, Trk 15, Chief 4
Station 19
-Eng 19, Trk 19
Dist 5 (NE area/Stapleton)
Station 2
-Trk 2, Chief 5
Station 14
-Eng 14
Station 26
-Eng 26, Trk 26
Station 27
-Eng 27, Twr 27
Station 29
-Eng 29
Dist 6 (NW/ Tennyson/Mouse Trap area)
Station 7
-Eng 7
Station 9
-Eng 9, Twr 9
Station 12
-Eng 12, Trk 12, Chief 6
Station 17
-Squirt 17
Dist 7 (S Federal/Westwood Neighborhood)
Station 20
-Eng 20
Station 23
-Eng 23, Twr 23, Chief 7
Station 25
-Eng 25
Station 28
-Eng 28, Trk 28
Station 30
-Eng 30
DIA (Dist 8, unofficially)
Station 31
-Twr 31, Red Chief (Dist Chief), RED units (ARFF)
Station 32
-Eng 32, ARFF
Station 33
-ARFF
Station 34
-ARFF
Hope that answers any ?s