Equipment and method used for solid particle or solid-liquid mixture washing and purification

The invention discloses equipment and a method used for solid particle or solid-liquid mixture washing and purification. The equipment comprises a tank body, a spray device, an overturning device and a limit switch; the spray device is arranged above the tank body; a filter layer is arranged in the tank body, a filtrate chamber is arranged below the filter layer, and a liquid drain hole is formed in the bottom of the filtrate chamber; a rotating shaft is arranged at the bottom of the tank body, and the bottom of the tank body is connected with the overturning device; the limit switch is arranged on the tank body or overturning device. The method includes that (1) filtering, to be specific, placing solid-liquid mixture on the filter layer, wherein the liquid enters the filtrate chamber through the filter layer and is drained through the liquid drain hole; (2) spray washing, to be specific, carrying out spray washing on solid granular material or the filter cake of the step (1); (3) water controlling and draining, to be specific, carrying out water controlling and draining on the washed solid granular material or filter cake; (4) overturning to discharge material, to be specific, starting the overturning device to discharge the solid granular material or filter cake from the tank. The equipment cost is low; the method is short in flow, high in automatic degree and high in washed product purity.