Double-layer filter element type degreaser and use method

The invention provides a double-layer filter element type degreaser and a using method thereof. The double-layer filter element type degreaser comprises a degreaser body, a middle partition plate is arranged in the degreaser body and divides the interior of the degreaser body into an upper cavity and a lower cavity, a fine filter element set is arranged above the middle partition plate, a coarse filter element set is arranged below the middle partition plate, and the coarse filter element set communicates with the fine filter element set; sewage draining outlets are formed in the bottoms of the lower cavity and the upper cavity, and are communicated with an external pipeline through a sewage draining pipeline. The degreaser adopts a quick-opening blind plate type and adopts a double-layer filtering type; the upper layer and the lower layer of the filter are respectively provided with an automatic blowdown system and a manual blowdown system; an inlet of the oil remover is provided with a one-way valve and a s