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1. WO2020159867 - GAZÉIFIEUR À TIRAGE ASCENDANT, PROCÉDÉ, APPAREIL ET SYSTÈME DE DÉCOMPOSITION DE BIOMASSE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A method for decomposing a feedstock, comprising:

providing a layer of inert particulate matter in a main chamber of a reactor, the reactor having an extraction chamber disposed at least partially within the main chamber, and the extraction chamber having an extraction chamber inlet positioned within the main chamber above a bottom of the main chamber, wherein the layer of particulate matter is disposed between the bottom of the main chamber and the extraction chamber inlet;

feeding the feedstock into the main chamber;

conducting pyrolysis of the feedstock in the main chamber; and

removing solid product from the main chamber via the extraction chamber.

2. The method according to claim 1, comprising feeding hot gas into the main chamber.

3. The method according to claim 2, wherein the hot gas is superheated steam.

4. The method according to claim 1, comprising conducting oxidation of the feedstock in the main chamber.

5. The method according to claim 1, wherein the particulate matter comprises sand.

6. The method according to claim 1, wherein the particulate matter consists essentially of sand.

7. The method according to claim 1, wherein the solid product comprises char.

8. The method according to claim 1, wherein the solid product consists essentially of char.

9. The method according to claim 1, wherein the feedstock positioned in a side region of the main chamber insulates side walls of the main chamber from heat in the center region of the main chamber.

10. The method according to claim 1, wherein the feedstock is fed through the center region of the main chamber while minimizing movement of feedstock positioned in a side region of the main chamber adjacent to side walls of the main chamber.

11. The method according to claim 1, wherein the feedstock in the center region of the main chamber is stirred and the feedstock in a side region of the main chamber is not stirred.

12. The method according to claim 11, wherein the stirring is conducted by a stirrer configured to move the feedstock in the center region of the main chamber and to minimize movement of feedstock in the side region.

13. The method according to claim 1, wherein the feedstock is a biomass feedstock.

14. The method according to claim 1, wherein the solid product removal is conducted by pumping a slurry comprising the solid product and water out of the extraction chamber.

15. The method according to claim 1, comprising removing the solid product from an outlet of the extraction chamber using an auger.

16. The method according to claim 1, wherein a rate of removal of solid product is controlled in response to a temperature detected at a position of the extraction tube inlet.

17. The method according to claim 1, wherein the layer of inert particulate matter abuts a bottom surface of the main chamber of a reactor, and the extraction chamber is provided in a center region of the main chamber.

18. A method for gasifying a feedstock, comprising:

providing a layer of inert particulate matter to insulate a bottom surface of a main chamber of a reactor, the reactor having an extraction chamber disposed at least partially within the main chamber, the extraction chamber having an extraction chamber inlet positioned within the main chamber in a center region of the main chamber above a bottom surface of the main chamber, wherein the layer of particulate matter is disposed between the bottom surface of the main chamber and the extraction chamber inlet;

feeding the feedstock into the main chamber; and

conducting pyrolysis of, and at least partial oxidation of, the feedstock in the reactor to generate gas.

19. The method according to claim 18, further comprising

feeding an oxygen-containing fluid into the chamber at an inlet positioned adjacent to the extraction chamber inlet, whereby oxidation is conducted in the extraction chamber.

20. A method for producing char, comprising:

providing a layer of inert particulate matter in a main chamber of a reactor, the reactor having an extraction chamber disposed at least partially within the main chamber, and the extraction chamber having an extraction chamber inlet positioned within the main chamber above the layer of inert particulate matter in the main chamber;

feeding the feedstock into the main chamber; and

heating the feedstock in the reactor to induce pyrolysis to yield char.

21. The method according to claim 20, comprising removing of the char by pumping a slurry comprising the char and water out of the extraction chamber.

22. The method according to claim 20, comprising removing the char by entraining the char in a downward flow of water from a water inlet disposed in a vicinity of the extraction chamber outlet.

23. The method according to claim 20, wherein the layer of inert particulate matter lines a bottom surface of the main chamber of a reactor, and the extraction chamber is provided in a center region of the main chamber.

24. The method according to claim 23, wherein the layer of inert particulate matter is disposed between the bottom surface of the main chamber and the extraction chamber inlet

25. A reactor for decomposing a biomass feedstock, comprising

a main chamber adapted for conducting pyrolysis of the feedstock,

an extraction chamber disposed at least partially within the main chamber, the extraction chamber having a extraction chamber inlet positioned within the main chamber in a center region of the main chamber above a bottom surface of the main chamber,

wherein a lower region of the main chamber is configured as a basin holding a layer of inert particulate matter along the bottom surface of the main chamber, the basin being disposed between the bottom surface of the main chamber and the extraction chamber inlet.

26. The reactor according to claim 25, further comprising a stirrer configured to move the feedstock in the center region of the main chamber and to minimize movement of the feedstock in a side region of the main chamber.

27. The reactor according to claim 25, further comprising an inlet for feeding oxygen-containing fluids into the chamber at a position adjacent to the extraction chamber inlet.

28. The reactor according to claim 25, wherein a char product of the pyrolysis is at least partially oxidized in the extraction tube to produce activated char.

29. The reactor according to claim 25, wherein a diameter of the extraction chamber inlet is less than or equal to one-third (1/3) of a diameter of the main chamber.

30. The reactor according to claim 25, comprising a water receptacle positioned to hold water to surround an outlet of the extraction chamber.

31. The reactor according to claim 30, wherein the water surrounding the extraction chamber outlet forms a water seal preventing entry of air into the extraction chamber.