Method to recover sodium from a sodium-sulfur battery and device to recover sodium from a sodium-sulfur battery

摘要

A method for recovering sodium (65) from a sodium-sulfur battery (50) in a charged state containing sodium (65) and sulfur in a battery container (51), the method comprising: a nozzle insertion stage to insert a nozzle (21) to which a treatment liquid (41) is supplied from a treatment liquid supply part (12) into the battery container (51); a reaction step of injecting a treatment liquid (41) from the nozzle (21) to the sodium (65) housed in a sodium housing part (55) in the battery container (51) and reacting the sodium (65) with the treatment liquid (41) to generate a reaction liquid (42); and a circulation stage of collecting the reaction liquid (42), adjusting the concentration and temperature of the collected reaction liquid (42) to generate the treatment liquid (41) and return the generated treatment liquid (41) to the supply part of the treatment liquid (12); where in the reaction stage, while the total amount of sodium (65) is reacted with the treatment liquid (41), the treatment liquid (41) is continuously injected into the sodium (65).