Abstract: This invention relates to a process for injection of fluid e.g. slurry into e.g. flue gases, and a nozzle device for the accomplishment of the process. The process according to the invention is characterized in that a thin stream of fluid e.g. slurry is injected into a wider stream of gas to form disintegrated drops, at which the fluid stream is peeled off on its way into the gas stream, the fluid stream is made to turn 180.degree.