Patent ID: 7368087

Claim:
A gas re-use system for a carbon fiber manufacturing process comprising: a) a furnace; b) a main pipe; c) a gas collection manifold; d) at least one mass controller wherein said main pipe runs from said gas collection manifold to said at least one mass controller, wherein said at least one mass controller is positioned to lead into an intake of said furnace; e) a compressor in communication with said main pipe; f) a physical particle filter disposed upstream of said compressor; g) a pressure regulating means in communication with said main pipe, and including a bleed pipe having a solenoid valve set to limit a maximum pressure, and a bypass line which runs back to said manifold, and at least one additional solenoid valve; h) at least one pressure sensor for reading a pressure in said manifold wherein said at least one additional solenoid valve opens when said at least one pressure sensor indicates a pressure below a benchmark level to prevent excessive pressure differences between an input pressure in said furnace and an output pressure in said furnace; and i) at least one diluent gas content meter coupled to said main pipe, which is used to assure a particular proportion between a set of supply gasses and a residual gas including a hydrocarbon and a diluent gas to be fed in to said furnace, wherein said proportion is determined by said at least one mass controller.