The invention provides a method for removing
sodium in high-
sodium coal. The method is characterized by comprising the following steps: step 1, crushing high-
sodium coal into crushed raw
coal of a certain size, putting the crushed raw coal into a container tank, and adding a washing solution into the container tank; step 2, putting the container tank into
microwave equipment, performing
microwave treatment on the crushed raw coal and the washing solution, heating the crushed raw coal and the washing solution to the temperature of 160-260 DEG C to obtain a high-temperature
mixed solution, and preserving the temperature of the high-temperature
mixed solution for 5-30 minutes to wash the crushed raw coal by using the washing solution, wherein the
microwave equipment comprises a
pressure control system, and the air pressure in the container tank is maintained to be 1-2 times that of saturated
vapor pressure which corresponds to the temperature of the washing solution; and step 3, taking the container tank out of the microwave equipment, filtering the high-temperature
mixed solution, and washing the filtered product with water, thereby obtaining low-sodium coal. According to the method for removing sodium in high-sodium coal disclosed by the invention, the content of sodium in the high-sodium coal can be effectively reduced, and the quality of the raw coal is improved.