System and method for producing an extruded protein product
The present disclosure relates to systems and methods for producing an extruded protein product. In particular, a system for making an extruded protein product using a system that includes a die including channel having a transverse cross section that is a continuous loop along at least a portion of the length of the die is disclosed.
1. A system for producing an extruded protein product, the system comprising:
an extruder configured to produce a stream comprising a proteinaceous composition having a protein component configured to form oriented fibers, the composition having a protein content of about 15% to about 90% based on dry weight of the composition, the stream having a moisture content of at least 27%; and
an elongated die having an internal longitudinal channel configured to receive the stream from the extruder, the longitudinal channel having a length, an outer diameter, and an inner surface configured to be cooled by a cooling apparatus, the longitudinal channel having a generally constant transverse cross-section that is a continuous loop along substantially an entire length of the die, the channel having a length and a gap thickness configured to form oriented fibers from the protein component in a generally parallel orientation to produce the extruded protein product, the length of the channel to the gap thickness of the channel having a ratio between about 30:1 and about 1000:1, the outer diameter being between about 200 mm and about 750 mm and the gap thickness being between 5 mm and about 30 mm.
2. The system of claim 1 , wherein the transverse cross-section is a simple closed curve.
3. The system of claim 2 , wherein the transverse cross-section of the channel is substantially elliptical.
4. The system of claim 2 , wherein the transverse cross-section of the channel is substantially circular.
5. The system of claim 1 , wherein the channel has inner and outer surfaces that are substantially concentric.
6. The system of claim 1 , wherein the ratio of the length of the channel to the gap thickness of the channel is between about 40:1 and about 240:1.
7. The system of claim 1 , wherein the ratio of the length of the channel to the gap thickness of the channel is between about 50:1 and about 160:1.
8. The system of claim 1 , wherein the ratio of the length of the channel to the gap thickness of the channel is between about 60:1 to about 140:1.
9. The system of claim 1 , wherein the gap thickness of the channel is between about 10 mm and about 30 mm.
10. The system of claim 1 , wherein the outer diameter of the channel is between about 200 mm and about 500 mm.
11. The system of claim 1 , wherein the elongated die includes the cooling apparatus outside of the longitudinal channel.
12. The system of claim 1 , wherein the moisture content of the proteinaceous composition is from about 27% to about 85%.
13. The system of claim 1 , wherein the die is modular.
14. The system of claim 1 , further comprising a transition apparatus between the extruder and the die.
15. The system of claim 14 , wherein the transition apparatus is configured to substantially evenly distribute a stream into the continuous loop of the channel.
16. The system of claim 15 , wherein the transition apparatus comprises a generally cone shaped apparatus to distribute the stream.
17. The system of claim 15 , wherein the transition apparatus is configured to split a stream into two or more substreams in order to distribute the stream.
18. The system of claim 14 , wherein the transition apparatus is configured to pre-align portions of the stream to facilitate texturization.
19. The system of claim 14 , wherein the transition apparatus comprises a static mixer.
20. The system of claim 19 , wherein the static mixer is configured to at least partially mix an additive into the stream.
21. The system of claim 20 , wherein the static mixer is configured to incompletely mix the additive into the stream.