NASHVILLE — The Tennessee Department of Safety and Homeland Security announced Monday that during the month of November it had more than doubled the number of photo identifications issued for voting purposes since the end of October. As of November 28, the department had issued 6,566 photo IDs for voting purposes, compared to the 2,385 issued as of October 31. A new state law will require a federal or state-issued photo ID to vote starting in 2012. The law also requires the Department of Safety and Homeland Security to issue photo IDs for voting purposes at no charge.