My children were both closer to 3 when we took it away. For my son we just told him a few days in advance and then we gathered them all up. He got to pick out a new toy in exchange. He was never much of a napper so it wasn't an issue for naps, at bed time he cried the first night and was fine.
For My daughter we had the "nucky fairy" come. We told her The fairy would take her old nuckys and turn them into brand new ones for brand new babies. I Got her a new stuffed animal for the first night without, a pink cow because she is fasinated with cows and loves pink :) The first night she cried for over an hour, but stayed in her room, each night it was less. Hvaing a replacement item helped to caml her down, having used the nuck fairy I could explain that she was too big and the new babies needed them. She would ask about "where my nucky" for a few weeks, so having an explanation worked for us.
Even though your daughter is younger I think the Fairy is a good way to help transition, gives a tangible way to say goodbye to the paci. She may not fully understand but it could still help. Giving her a replacable object from you also helps, a snugali.
I would take them away at bed time, and DONT give them back, she will start to think if she stays up, cries ect eventually you will give in. She has been dependant on her Paci for sleep for a long time it will be an adjustment for her to learn how to calm down and go to sleep with out it! Be patient, distract yourself so your not having to wait it out just listening to her, Good Luck!