Patent ID: 7988868

Claim:
A method for dewatering and drying solid-liquid mixtures, the method comprising the steps of: a) feeding a suspension to be treated via a duct into a device; b) draining of a filtrate via ducts while retaining solid components as a filter cake with a filter medium; c) heating the filter cake by switching on a heating circuit; d) pressing the filter cake formed during dewatering by membrane pressing by means of a gas or a liquid; e) connecting a vacuum unit to the ducts and evacuating a vapor space and an interconnected pore volume in the filter cake, whereby the drying of the filter cake is started and the filter cake cools due to the extraction of the energy of evaporation from the interior of the filter cake; f) filling the vapor space and the interconnected pore volume in the filter cake with air or an inert gas to an excess pressure of up to 1 bar, wherein a resting pause is initiated in drying, and the filter cake is heated up again; g) repeating said steps e) and f) until an intended degree of drying is reached; h) switching off the heating circuit and terminating the membrane pressing; and I) removing the dried filter cake from the device.