A system for separating solids from a liquid-solid slurry includes a collection vessel configured to receive the liquid-solid slurry in first opening and discharge it through a second opening. There is a filter unit having a chamber with a plurality of apertures and a discharge port. There is a pump unit interconnected to the chamber of the at least one filter unit. One of the filter unit or the pump unit is in fluid communication with the second opening in the collection vessel and is configured to receive the liquid-solid slurry and it through the filter unit chamber, causing liquid from the liquid-solid slurry to flow through the apertures and the solids to be retained in the chamber of the filter unit. The pump unit includes a discharge device which is translatable through the chamber of the filter unit to force solids retained in the chamber toward the discharge port.

A system is provided for the dynamic dewatering of any of a variety of sludges, slurries, or waters. A stream of material is treated in a series of distinct operations to release free water, draw off additional water through vacuum, and compress the resultant dewatered solids to result in a substantially dewatered material. One or more open cells are used in vacuum dewatering in continuous dynamic operation. The system may be integrated into a packaged unit that may be installed at a operation site, and maybe operated with multiple like units to increase treatment flowrates.

A system is provided for the dynamic dewatering of any of a variety of sludges, slurries, or waters. A stream of material is treated in a series of distinct operations to release free water, draw off additional water through vacuum, and compress the resultant dewatered solids to result in a substantially dewatered material. One or more open cells are used in vacuum dewatering in continuous dynamic operation. The system may be integrated into a packaged unit that may be installed at a operation site, and maybe operated with multiple like units to increase treatment flowrates.

A process for the purification of crude polyether polyols is provided, wherein the crude polyether polyols are prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts, the process comprising the steps of: neutralization of the catalysts with mineral acid, addition of adsorption agents and/or filter agents and removing the resultant salts and added filter aids by filtration wherein a filter cake is formed, and wherein polyether polyols are recuperated from the filter cake in a subsequent step of pressing the filter cake.

A process for the purification of crude polyether polyols is provided, wherein the crude polyether polyols are prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts, the process comprising the steps of: neutralization of the catalysts with mineral acid, addition of adsorption agents and/or filter agents and removing the resultant salts and added filter aids by filtration wherein a filter cake is formed, and wherein polyether polyols are recuperated from the filter cake in a subsequent step of pressing the filter cake.

The present disclosure may include a press screw separator configured for separating solid components from a slurry containing solid and liquid components. The separator may include a housing, a frame arranged in the housing, and a cylindrical screen which is arranged at least partially in the frame. The separator may also include a screw adapted for pressing out the slurry, which screw may be arranged within the screen and mounted so as to be rotationally movable about a longitudinal axis of the screen. The frame may be mounted in the housing without any clearance.

The present disclosure may include a press screw separator configured for separating solid components from a slurry containing solid and liquid components. The separator may include a housing, a frame arranged in the housing, and a cylindrical screen which is arranged at least partially in the frame. The separator may also include a screw adapted for pressing out the slurry, which screw may be arranged within the screen and mounted so as to be rotationally movable about a longitudinal axis of the screen. The frame may be mounted in the housing without any clearance.

Devices, systems, and methods for concentrating a slurry are disclosed. A concentrator is utilized, including a cylindrical vessel containing a cylindrical filter and a screw. The cylindrical filter consists of a plurality of spaced annuli. The screw passes through the cylindrical filter. A slurry passed through the cylindrical vessel is concentrated. The slurry is conveyed by the screw along an interior of the cylindrical filter. Any two concentric annuli are spaced such that the solid is prevented from passing between them. The slurry is concentrated to produce a concentrated slurry by restricting the product outlet such that a back pressure is created in the cylindrical vessel. The back pressure causes a portion of the liquid to pass between the annuli and out a fluid outlet. The concentrated slurry passes out a product outlet.

A device for separating the liquid phase from the solid phase of a slurry, wherein such separation is obtained by a filtration process, preferably under pressure, in combination with a process of clarification and withdrawal of the clarified liquid within the filter at an adjustable height.

A device for separating the liquid phase from the solid phase of a slurry, wherein such separation is obtained by a filtration process, preferably under pressure, in combination with a process of clarification and withdrawal of the clarified liquid within the filter at an adjustable height.