The present invention relates generally to a device and method for supplying a sorbent, at one or more various desired supply points in a flue gas stream, to boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.). In one embodiment, the device of the present invention that is designed to supply a sorbent comprises a series of coaxial pipes. In another embodiment, the device of the present invention that is designed to supply a sorbent comprises a mixing section with a plurality of distribution vanes contained in at least one mixing section.