A system (100) for feeding propellant to an igniter, the system comprising: a tank (10) presenting an admission (11) and an outlet (12); a liquid propellant feed line connected to the admission (11) of the tank (10); and a propellant outlet line connecting an outlet (12) of the tank (10) to an igniter (40); the system being characterized in that said tank (10) presents an inside volume filled with heat storage spheres (20), said storage spheres (20) being adapted to store heat and to transmit it to a fluid passing through said tank (10), in such a manner as to vaporize a liquid propellant passing through said tank (10).

A particle separator module and a heat exchange chamber module connectable to a circulating fluidized bed boiler. The particle separator module includes 2N vertically aligned steam tubes, N being an integer greater than one. Each of the vertically aligned steam tubes is attached to a boiler upper portion and extends downwards to a predetermined level. Each of the 2N vertically aligned steam tubes is attached to one of N first beams. Each of the N first beams is suspended to hang in a horizontal position at the predetermined level by two adjacent steam tubes of the 2N vertically aligned steam tubes. N second beams are attached in a horizontal position to the top surface of the heat exchange chamber module, which is arranged to be suspended from the particle separator module by having each of the N second beams suspended by two adjacent beams of the N first beams.

Methods and systems are provided for extracting and utilizing the energy contained in molten slags generated from metal producing and refining operations. The energy is extracted while the slag is contained within a containment vessel, such as a slag pot, after the slag has been discharged from a furnace. The energy is accessed by immersing into the slag a temperature-resistant treatment vessel, such as, a cylindrical vessel made of graphite, having an internal cavity. The energy from the slag is transmitted by direct contact with the surface of the treatment vessel. The treatment vessel and slag may be moved relative to each other to overcome the low thermal conductivity of the slag. Any substance placed within the cavity is thereby heated without directly contacting the molten slag. The methods and systems provide for high temperature chemical reactions, energy conversions, or transfer operations within the internal cavity.

Methods and systems are provided for extracting and utilizing the energy contained in molten slags generated from metal producing and refining operations. The energy is extracted while the slag is contained within a containment vessel, such as a slag pot, after the slag has been discharged from a furnace. The energy is accessed by immersing into the slag a temperature-resistant treatment vessel, such as, a cylindrical vessel made of graphite, having an internal cavity. The energy from the slag is transmitted by direct contact with the surface of the treatment vessel. The treatment vessel and slag may be moved relative to each other to overcome the low thermal conductivity of the slag. Any substance placed within the cavity is thereby heated without directly contacting the molten slag. The methods and systems provide for high temperature chemical reactions, energy conversions, or transfer operations within the internal cavity.