If you read through the various threads on the topic, you will find that although heating the beer after fermentation will reduce the alcohol content, it is totally impossible to eliminate it all. You will hear from various people who obviously were not paying attention in high school science who will tell you the following:
This is completely incorrect, water and ethanol mixtures have boiling points which correspond to concentration. As ethanol vapourizes, the boiling point of the mixture goes up, increasing the amount of water that vaporizes with the ethanol. You will know when all of the ethanol is gone, because all the water will be gone as well.
It is possible to significantly reduce alcohol content while water remains (into the realm of 1% or less) but it is not possible to eliminate it entirely.