A device for separation and removal of light impurities of a granular material has a body (1) in the upper part of which is located a fan (2) that sucks air, driven by a motor (3), and in the central part is axially fixed a hopper (6) connected to an inlet (7) of the granular material wherein in the lower part of the device is located a module (13) in the shape of a centripetal guide (14) consisting of a cylindrical housing (15) on the internal wall of which are evenly arranged, at a distance from each other, in different transverse planes, directing plates (16) turned with their ends towards the device axis such that the plates (16) in one plane are shifted in relation to the plates (16) in an adjacent plane. Between the hopper (6) and constituting a separate module (13) the centripetal guide (14) with directing plates (16), a module (8) is located in the shape of a cylinder (9) inside which is located a centrifugal guide (10) that has a shape of an axial supporting member (11) on the surface of which in different transverse planes are fixed directing elements (12) turned with their ends towards the internal wall of the cylinder (9). The modules (8) with the centrifugal guide (10) and the modules (13) with the centripetal guide (14) are placed alternately below the hopper (6).

An aspiration hopper assembly having a diverter vane, an adjustable depth plate, and a slidable product wave plate disposed within and connected to an aspiration hopper. Below the aspiration hopper is an air tube housing having an air tube with a cut-out section, an air pick-up chamber, and an adjustable velocity plate. Sight windows provide a means for visual inspection to monitor performance when making the adjustments for optimal results. The purpose of the aspiration hopper assembly is to allow good product to pass through the aspiration hopper in order to remove foreign material that is the similar size and lighter in density from good product.

A debris removal system for an agricultural harvester may include an extractor having an extractor housing defining a central airflow channel for directing debris through the extractor from a central inlet to a central outlet. The extractor housing may further define an outer airflow channel surrounding the central airflow channel. The outer airflow channel may define a flow path between an outer housing inlet and an outer airflow outlet. Additionally, the extractor housing may include an internal divider wall extending between the central and outer airflow channels. Moreover, the system may include at least one flow-generating device provided in operative association with the housing. The flow-generating device(s) may be configured to generate an airflow directed through the outer airflow channel, wherein the airflow generates a negative pressure within the central airflow channel that draws the debris into the extractor housing via the central airflow inlet.

An agricultural grain cleaner includes an inlet chute having an inlet end and an outlet end positioned below the inlet end. A crop distribution member is positioned adjacent the outlet end of the inlet chute. The crop distribution member includes a distribution disc rotatable relative to the inlet chute about a vertical central axis to impart a horizontal trajectory, away from the central axis, to crop material supplied to the distribution disc from the inlet chute. A fan is operable to generate an air stream from below the crop distribution member, across the horizontal trajectory, to an air-chaff outlet. A grain collection chute has an inlet to receive grain that is cleaned of chaff by the air stream. A tailings collection chute is positioned adjacent to the grain collection chute on a radially inner side thereof.

A method for fractionating a milled grain product into coarse and fine fractions includes providing a sieving apparatus with a bottom chamber divided from a top chamber by a sieve, an inlet port in the top chamber, a top chamber cover defined by a plurality of openings, and a first exit port in the bottom chamber, and applying vacuum suction to the sieving apparatus. The vacuum suction is configured to draw grain particles through the inlet port into the top chamber, generate substantially horizontal airflow in the top chamber via the inlet port; and generate substantially vertical airflow in the top chamber via the plurality of openings, wherein the substantially horizontal airflow and the substantially vertical airflow combine to generate turbulence which fluidizes the grain particles in the upper chamber and prevents blockage of the sieve; and drawing fine grain particles through the sieve and out of the bottom chamber via the first exit port under the vacuum suction and collecting a fine grain particle fraction.

A device for separation and removal of light impurities from granular material has a cylindrical body, in the upper part of which is located a motor-driven fan that sucks air and an outlet channel for light impurities, below which there is axially mounted a feed channel connected to a container of granular material, and in the lower part of the body there is axially located a cylinder with an outer diameter smaller than the inner diameter (d) of the body, containing a centrifugal guide located under the outlet of the feed channel, whereas below the centrifugal guide, on the inner wall of the cylinder are fixed uniformly spaced directing plates at a certain distance from each other, their ends being pointed towards the axis of the device, and between the body and the cylinder there is a chute for purified material. There is a plurality of openwork hinders.

A sieving apparatus for fractionating a grain product comprises a top chamber separated from a bottom chamber by a sieve; a top chamber cover defined by a plurality of openings that allow substantially vertical entry of an air stream into the top chamber when the interior of the sieving apparatus is under vacuum via first exit port in a side wall of the bottom chamber for exit of air; an inlet port in a sidewall of the top chamber, the inlet port configured for feeding of dry grain particles into the top chamber and for substantially horizontal entry of air into the top chamber; and a first exit port in a sidewall of the bottom chamber for exit of air and exit of a first grain fraction from the bottom chamber when the interior of the sieving apparatus is under vacuum via the exit port.

Disclosed is a method for treating fly ash containing an initial carbon concentration to obtain ash containing a predetermined final carbon concentration less than the initial concentration, the method including: a step of granulometric separation of the ash into at least two fractions, a coarse traction and a fine fraction, the coarse fraction having a granulometry greater than the fine fraction; a step of extracting carbon from the ash; a method wherein the extraction step is subsequent to the separation step, the extraction step being implemented solely on the coarse fraction, by electrostatic separation, the method including a step of drying the ash during which the temperature of the ash is above 60 C.

An air classifier for classifying a mixture of fine and coarse particles by size or aerodynamic shape, wherein the air classifier generally comprises a settling box through which a laminar airflow passes that improves introduction of particles into the airflow and thus improves separation and grading of particles by the air classifier.

An air classifier for classifying a mixture of fine and coarse particles by size or aerodynamic shape, wherein the air classifier generally comprises a settling box through which a laminar airflow passes that improves introduction of particles into the airflow and thus improves separation and grading of particles by the air classifier.