Fly ash treatment method and system

The invention relates to a fly ash treatment method and system, and belongs to the field of fly ash treatment. The method of fly ash treatment includes: providing a fly ash treater having a separation channel defined by an inner wall; the fly ash to be treated is pneumatically input into a separation channel of the fly ash treater, so that spiral airflow is formed in the fly ash treater, and upward-moving gas separated matter and downward-moving solid separated matter are formed; and in the process of discharging the gas separated matter and the solid separated matter, gas is jetted into the separation channel through the inner wall, so that surface attachment gas flow is formed on the surface of the inner wall, and the surface attachment gas flow is used as an isolation layer distributed between the spiral gas flow and the inner wall. According to the method, the attachment surface airflow layer is formed near the inner wall of the fly ash processor, so that contact and collision between particles in the pro