Movable slag removal device and use method thereof

The invention discloses a movable slag removal device which comprises a storage tank, manholes are formed in the top and the bottom of the storage tank, manhole connectors are arranged on the outer sides of the manholes, universal flushers are arranged on the sides, close to the interior of the storage tank, of the manhole connectors correspondingly, and a high-viscosity conveying pump is arranged on one side of the storage tank; a first metal hose is connected between the high-viscosity conveying pump and the manhole connector in a sealed mode, a first movable frame is arranged on one side of the high-viscosity conveying pump, a separating and drying assembly is arranged in the first movable frame, and a conveyor is arranged on one side of the separating and drying assembly. A second metal hose is connected between the high-viscosity conveying pump and the separating and drying assembly in a sealed mode, a second movable frame is arranged on one side of the first movable frame, a high-pressure flushing assem