A material bed roller mill for comminution of grain in a material bed. The material bed roller mill comprises rollers, at least one feed opening, a draw-in region between the rollers, a grinding gap between the rollers and at least one delivery opening. The material bed roller is configured, during operation, to produce a material bed in the draw-in region and to draw grain from a surplus thereof by a filled material duct or hopper. A specific grinding force of the material bed roller mill can be set in such a way that grain is heated, during the grinding operation, by less than 30° C., preferably by less than 15° C., to the temperature of the grain before the respective grinding.

A sifting device having an upper chamber and a lower chamber. An upper chamber offset opening is disposed on the end wall of the upper chamber and offset from a central axis. A shaft rotates about the central axis of the upper chamber. A blade in the upper chamber and attached with the shaft. The blade is configured to rotate between an open position and a closed position. A cone element is disposed on the blade and concentric with the upper chamber. A lower sifting element is disposed within the lower chamber. The shaft attached with the lower sifting element such that the lower sifting element rotates in the lower chamber when the shaft rotates. The upper chamber offset opening is configured to allow powdered substance to move from the upper chamber to the lower chamber so that the blade and lower sifting element can sift powdered substances.

A sifting device having an upper chamber and a lower chamber. An upper chamber offset opening is disposed on the end wall of the upper chamber and offset from a central axis. A shaft rotates about the central axis of the upper chamber. A blade in the upper chamber and attached with the shaft. The blade is configured to rotate between an open position and a closed position. A cone element is disposed on the blade and concentric with the upper chamber. A lower sifting element is disposed within the lower chamber. The shaft attached with the lower sifting element such that the lower sifting element rotates in the lower chamber when the shaft rotates. The upper chamber offset opening is configured to allow powdered substance to move from the upper chamber to the lower chamber so that the blade and lower sifting element can sift powdered substances.

A method and system for reducing the unfermentable solids content in a protein portion, via a counter current wash, at the back end of a corn dry milling process for making alcohol is disclosed. The method can include separating the whole stillage byproduct into an insoluble solids portion and a stillage (centrate) portion, which includes protein. Thereafter, the stillage portion can be separated into a water soluble solids portion and a protein portion. The protein portion may be mixed with clean water to wash and dilute the protein portion. The diluted protein portion may be dewatered to form a dewatered protein portion and a centrate. A portion of the centrate may be used as a protein counter current wash when the protein portion is being separated from the stillage portion. The protein counter current wash reduces the amount of unfermentable solids in the protein portion and the centrate.

A method and system for reducing the unfermentable solids content in a protein portion, via a counter current wash, at the back end of a corn dry milling process for making alcohol is disclosed. The method can include separating the whole stillage byproduct into an insoluble solids portion and a stillage (centrate) portion, which includes protein. Thereafter, the stillage portion can be separated into a water soluble solids portion and a protein portion. The protein portion may be mixed with clean water to wash and dilute the protein portion. The diluted protein portion may be dewatered to form a dewatered protein portion and a centrate. A portion of the centrate may be used as a protein counter current wash when the protein portion is being separated from the stillage portion. The protein counter current wash reduces the amount of unfermentable solids in the protein portion and the centrate.

The exemplary embodiments herein provide a roller grain mill assembly having a lower frame, a plurality of roller grain mills attached to the lower frame, an upper frame extending upwardly from the lower frame, a single electric drive mechanically coupled to each of the roller grain mills, and a cyclone separator placed in gaseous communication with the roller grain mills and located above the electric drive. In some embodiments, a centrifugal scatterer may be suspended from the upper frame and placed in gaseous communication with the roller grain mill. In other embodiments, a cyclone separator may be placed in gaseous communication with the roller grain mill and centrifugal scatterer. An electric drive coupled to each roller grain mill may be cantilevered off the lower frame.

The exemplary embodiments herein provide a roller grain mill assembly having a lower frame, a plurality of roller grain mills attached to the lower frame, an upper frame extending upwardly from the lower frame, a single electric drive mechanically coupled to each of the roller grain mills, and a cyclone separator placed in gaseous communication with the roller grain mills and located above the electric drive. In some embodiments, a centrifugal scatterer may be suspended from the upper frame and placed in gaseous communication with the roller grain mill. In other embodiments, a cyclone separator may be placed in gaseous communication with the roller grain mill and centrifugal scatterer. An electric drive coupled to each roller grain mill may be cantilevered off the lower frame.

A method and system for producing a high protein meal from a whole stillage byproduct produced in a grain dry-milling process for making ethanol, with optional back end milling options, is disclosed. In one embodiment, a method for producing a high protein meal from a whole stillage byproduct includes separating the whole stillage byproduct into an insoluble solids portion and a thin stillage/centrate portion, wherein at least one milling step can be applied to one or both of the insoluble solids portion and the whole stillage portion. Next, the centrate portion may be separated into a protein portion and a water-soluble solids portion. And then the protein portion can be dewatered and/or dried to define a high protein meal having at least 40 wt % protein on a dry basis.

A method and system for producing a high protein meal from a whole stillage byproduct produced in a grain dry-milling process for making ethanol, with optional back end milling options, is disclosed. In one embodiment, a method for producing a high protein meal from a whole stillage byproduct includes separating the whole stillage byproduct into an insoluble solids portion and a thin stillage/centrate portion, wherein at least one milling step can be applied to one or both of the insoluble solids portion and the whole stillage portion. Next, the centrate portion may be separated into a protein portion and a water-soluble solids portion. And then the protein portion can be dewatered and/or dried to define a high protein meal having at least 40 wt % protein on a dry basis.

The present invention relates generally to corn dry-milling, and more specifically, to methods for producing a high protein corn meal from a whole stillage byproduct produced in a corn dry-milling process for making ethanol and a system therefore. In one embodiment, a method for producing a high protein corn meal from a whole stillage byproduct includes, in a corn dry-milling process for making ethanol, separating the whole stillage byproduct into an insoluble solids portion and a thin stillage portion. The thin stillage portion is separated into a protein portion and a water soluble solids portion. Next, the protein portion is dewatered then dried to define a high protein corn meal that includes at least 40 wt % protein on a dry basis.