A laminated spiral dewatering equipment, including a filtration cavity, a spiral shaft, a driving device and multiple supporting plates. The supporting plates are configured to support and position the filtration cavity, the spiral shaft and the driving device. The spiral shaft is penetratedly arranged in the filtration cavity. The filtration cavity includes a first closed ring piece group and a second closed ring piece group. A primary driving rod of the driving device is arranged above the filtration cavity, and is configured to drive an upper end of the first closed ring piece group to circumferentially reciprocate, and a lower end of the first closed ring piece group to perform a up-down reciprocating linear motion.

A rotary filter for liquid/solid separation includes a trough for containing a suspension, and at least one disk non-rotatably connected to a main shaft. The at least one disk includes filter sectors that each include a structural element covered by a filter medium, and a duct connecting each filter sector to pipes arranged along the main shaft. The filter sectors include a first series separated from a second series. The main shaft includes first and second pipes that communicate with the first series and the second series, respectively. The rotary filter includes comb teeth arranged above a level of the suspension on either side of the at least one disk. The main shaft occupies a first angular position with the first series under the comb teeth and the second series above the comb teeth, and a second angular position with the second series under the comb teeth and the first series above the comb teeth.