I'm flying in from DFW, and need to stay overnight at beijing capital airport.

Yes, there are the baggage service counters at T1, T2 and T3. The specific locations are as following.
T1: at the entrance of the corridor, the east of the hall on 2nd floor
T2: beside the Gate 10 of Departure Hall on 2nd floor
T3-C:
1) at the east of public area in Arrival Hall on 2nd floor
2) at the west of public area in Arrival Hall on 2nd floor
There also are hourly lounges at the airport. Here are their locations.
T1: the stairs at the west of Gate 8 on 2nd floor
T2:
1) between Gate D2 and D3 on the underground floor
2) between Gate D2 and D3 on the underground floor
T3-C: at the west of public area in Arrival Hall on 2nd floor
T3-E: at the east of International Departure Hall