Gasification-pyrolysis dual reactor device

Coal gasification-pyrolysis dual reactor device, characterised in that it incorporates the following items:

• A feeder which feeds wet milled coal from an upper feeding nozzle (1) split into two branches (1a) and (1b), which includes a jaw crusher and ball mill inside one of the said branches, and a ball mill inside the other branch, to mill the initial coal material;
• A screened coal mixing/distribution item (2) located downstream of the feeding and milling nozzles (1), wherein the screened coal falls inside said mixing/distribution item (2) both as a result of the steam fed as dragging gas and to the weight of the dust itself, and such circulation of gas fosters the flow of coal particles, minimising their deposition at the walls of the mixing/distribution item (2);
• A chamber (3), essentially intended for gasification purposes, located downstream of the item (2) where the wet screened material is partially oxidised through an additional supply of oxygen, at a temperature of approximately 1,800° C.-1,900° C., the interior of the chamber (3) being provided with a refractory cladding, to maintain the inner temperature, as well as an insulating cladding on the outer part, to minimise heat losses caused by radiation to the exterior surface of the walls;
• the chamber (3) is divided into two sub-chambers (3a, 3b) by means of a gas diffusion membrane which allows to separate H2- and carbon-based gases (CO2, CO) obtained as a mixture of synthesis gas;
• a cyclone separator (4) located downstream of the chamber (3), which retains the solid particles present in the synthesis gas, which operates at a temperature of 600° C. which is maintained by the gas inside the unit;
• an essentially pyrolytic chamber (5) where the solids carried from the cyclone separator (4) are pyrolysed, the free carbon, H2S and part of CO2 being essentially eliminated, and the residual gases being fed back into the chamber (3);
• a sawtooth screen (6) which collects the solid waste obtained from the simultaneous gasification and pyrolysis processes, and which is subsequently stored as slag and ashes in an storage element for their subsequent reuse.