I am now at 82,000 words, with daily average of 3,000 words. However, the amount I write each day varies from 2k to 6k depending on how much free time I have. What works for me to get all of those words down quickly is word sprints.
A word sprint is a timed period where you focus on writing as much as possible. My word sprints are based on the pomodoro technique. You write for twenty five minutes, then take a five minute break to focus on something else. I combine these thirty minute chunks into one to two hours of writing. After two hours, I take a longer break of at least twenty minutes.
When using these technique for words sprints, I write around 2,000 words an hour. This means that I can reach my daily word goal with three chunks of writing, or just an hour and a half a day.