INORGANIC SALT RECOVERY SYSTEM AND METHOD THEREOF

摘要

The present invention relates to an apparatus and method for retreating a solid propellant for a propulsion system, which can enable the recovery of resources using the difference in solubility of the main components (inorganic salts, polymer materials, metals, and the like) of the solid propellant within the propulsion system without using a separate solvent, such as an interfacial active agent or water, and without incinerating the solid propellant. To this end, the apparatus for retreating the solid propellant includes: a propellant extraction part for extracting the solid propellant from the propulsion system in the shape of a chip; a micro-pulverization part receiving a propellant mixture in which the chip-shaped solid propellant and cooling water used for extracting the solid propellant are mixed together from the propellant extraction part to pulverize the propellant contained in the propellant mixture into particles having a size of about 1 µm or less while maintaining a preset temperature; a solid-liquid separation part receiving the propellant mixture containing the propellant pulverized into particles from the micro-pulverization part so as to separate the solids in which the polymers and metals are mixed from the propellant mixture, thereby separating a liquid inorganic-salt solution; a concentrating part receiving the inorganic-salt solution from the solid-liquid separation part so as to remove a predetermined amount of water contained in the inorganic-salt solution, thereby increasing the concentration of the inorganic-salt solution; and a drying part receiving the inorganic-salt solution from the concentrating part so as to dry the inorganic-salt solution, thereby obtaining crystalline inorganic-salt powder.