Disclosed is a piston press of the type used in the field of the dehydration of products to be dehydrated such as sludge from a purification plant. More particularly, it relates to a piston press including a pressing chamber supplied with sludge and able to manage air streams that it generates, and to a method for using such a press. In a preferred mode of embodiment, the piston press includes a pipeline having a water removal branch and arranged so as to remove water extracted during a sludge-pressing operation, and an air circulation branch that can channel the volumes of air circulating in the press during the operation thereof, so as to direct the vitiated air, i.e. air that has been brought into contact with the sludge during the implementation of the press, towards a deodorization system.

Disclosed is a piston press of the type used in the field of the dehydration of products to be dehydrated such as sludge from a purification plant. More particularly, it relates to a piston press including a pressing chamber supplied with sludge and able to manage air streams that it generates, and to a method for using such a press. In a preferred mode of embodiment, the piston press includes a pipeline having a water removal branch and arranged so as to remove water extracted during a sludge-pressing operation, and an air circulation branch that can channel the volumes of air circulating in the press during the operation thereof, so as to direct the vitiated air, i.e. air that has been brought into contact with the sludge during the implementation of the press, towards a deodorization system.

An apparatus (1) and a method for dewatering wood material (2). The apparatus (1) includes a first roll (3) and a second roll (4) that form a nip (N i) in which water can be pressed out of the wood chips (2). An endless permeable conveyor (5) is arranged to pass through the nip (Ni) and carry wood chips (2) through the (Ni).

An apparatus (1) and a method for dewatering wood material (2). The apparatus (1) includes a first roll (3) and a second roll (4) that form a nip (N i) in which water can be pressed out of the wood chips (2). An endless permeable conveyor (5) is arranged to pass through the nip (Ni) and carry wood chips (2) through the (Ni).

A method and apparatus for the continuous sublimation of a substance includes cascading a material containing a substance capable of sublimation, such as water, between a plurality of trays vertically stacked within a processing zone provided within a processing chamber. A substantially atmospheric environment is maintained within the processing zone at a temperature whereby the substance sublimes forming a sublimate within the environment. The environment containing the sublimate is contacted with a drying agent such as a desiccant to maintain the environment whereby the substance sublimes at substantially atmospheric pressure and at the controlled temperature.

A method and apparatus for the continuous sublimation of a substance includes cascading a material containing a substance capable of sublimation, such as water, between a plurality of trays vertically stacked within a processing zone provided within a processing chamber. A substantially atmospheric environment is maintained within the processing zone at a temperature whereby the substance sublimes forming a sublimate within the environment. The environment containing the sublimate is contacted with a drying agent such as a desiccant to maintain the environment whereby the substance sublimes at substantially atmospheric pressure and at the controlled temperature.

A rubbery polymer extrusion dryer includes a cylinder; and a die having a plurality of openings at one end of the cylinder, wherein each of the openings includes an opening base and at least one extended opening portion in communication with the opening base, and the extended opening portion has a shape with an opening width expanding in a direction away from the opening base.

A rubbery polymer extrusion dryer includes a cylinder; and a die having a plurality of openings at one end of the cylinder, wherein each of the openings includes an opening base and at least one extended opening portion in communication with the opening base, and the extended opening portion has a shape with an opening width expanding in a direction away from the opening base.

Device for the separation of a product in a liquid fraction and in a non-liquid fraction, consisting of a supply device and a transport zone which ends in a cylindrical tube provided with a dewatering zone with lateral perforations, whereby part of the liquid fraction of the product is forced out through the perforations of the press zone with formation of a pressed press cake that is pushed to the exit thereof, whereby a good separation of liquid from the solid pressed press cake is obtained.

Device for the separation of a product in a liquid fraction and in a non-liquid fraction, consisting of a supply device and a transport zone which ends in a cylindrical tube provided with a dewatering zone with lateral perforations, whereby part of the liquid fraction of the product is forced out through the perforations of the press zone with formation of a pressed press cake that is pushed to the exit thereof, whereby a good separation of liquid from the solid pressed press cake is obtained.