Bottom-drying sludge drying device and method

Abstract

The present disclosure provides a bottom drying type sludge drying device, comprising: a housing in which a curved-face partition is provided for separating space in the housing into first and second drying chambers; a feed gate and an outlet provided on an upper portion of the first drying chamber, and a discharge gate provided on the circumferential wall of the first drying chamber. An inlet is provided on a side wall or bottom of the second drying chamber. The curved-face partition comprises a depressed area in which a communication opening is formed, and a bridge-shaped element is provided above the communication opening, forming a lateral aperture between the bridge-shaped element and the partition. A sludge stirring assembly is provided in the first drying chamber, which comprises a rotary shaft and a stirring unit fixed on the rotary shaft, and the stirring unit is configured to cut, break and stir the sludge and/or that a front end thereof faces and is close to the lateral aperture, such that the front end scrapes the sludge in or at the communication opening as the stirring unit rotates. The present disclosure further provides a method of drying sludge using a sludge drying device.