Distiller grain pellet production devices

  • US 8,287,268 B1
  • Filed: 04/16/2012
  • Issued: 10/16/2012
  • Est. Priority Date: 04/15/2011
  • Status: Active Grant
First Claim
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1. A device for producing a high density compact livestock feed from a loose granular material, comprising:

  • a source for supplying a loose granular material to be treated;

    a controller in communications with a plurality of sensors for monitoring and controlling transfer of the treated material through a series of successive treatment zones comprising a heating zone, a compression zone, and a cooling zone;

    the heating zone comprises at least one heater and at least one screw compression dryer;

    the screw compression dryer comprising an elongated housing having an inlet end and a discharge end, the inlet end in communication with the source and to receive the loose granular material to be treated for drying;

    a continuous rotatable screw provided within the housing and extending between the inlet end and the discharge end, the screw has a diameter which increases in dimension in a direction away from said inlet end for increasing a compressive force applied to the treated material to assist with drying as the treated material as the screw rotates and moves the treated material longitudinally along the screw;

    a drive coupled to the profile screw for axially rotating the screw, wherein the drive is in communication with the controller to regulate a residence time of the treated material in the treatment zones;

    the at least one heater disposed along the housing for heating the treated material moving along the screw to a first predetermined temperature which causes at least one oil and liquid to boil within the treated material and changes physical properties of the treated material into a modulus state;

    the compression zone comprises a compression device for compacting the treated material;

    the compression device having a through hole which extends longitudinally through the compression device and provides a passage for compressing the treated material, the through hole includes an inlet orifice for receiving the treated material from the heating zone and an outlet orifice for discharging the treated material to the cooling zone, in the modulus state wherein the inlet orifice includes a cross sectional area that is less than a cross sectional area defined by the circumference of an inside wall for the discharge end of the elongated housing, the treated material is pressed longitudinally through the compression chamber by simultaneously applying a lateral pressure and a two-dimensional cross-section compression which includes a pressure applied in a direction traverse to a direction of transport and a pressure applied in a direction parallel to the direction of transport, the controller controls the two-dimensional cross-section compression applied to the treated material such that liquids in the treated material migrates to the outer surface of the treated material upon reaching the outlet orifice; and

    the cooling zone comprising a cooling unit including a die extremity tubing and a heat exchanger for cooling the treated material received from the compression zone to form a high density compact body;

    the heat exchanger having a cooling conduit provided between a heat exchanger inlet and a heat exchanger outlet,the die extremity tubing comprises a first opening in direction communication with the outlet orifice for receiving the treated material from the compression zone and a second opening for discharging the treated material from the device as a high density livestock feed, the die extremity tubing extends through the cooling conduit such that the heat exchanger surrounds the die extremity tubing to cool the treated material using conductive heat transfer and the heat exchanger is controlled to cool the treated material to a second predetermined temperature which is below the boiling temperature of the oil and liquid within the treated material.

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