CA2681282A1 - System and method for drying and torrefaction - Google Patents
System and method for drying and torrefaction Download PDFInfo
- Publication number
- CA2681282A1 CA2681282A1 CA2681282A CA2681282A CA2681282A1 CA 2681282 A1 CA2681282 A1 CA 2681282A1 CA 2681282 A CA2681282 A CA 2681282A CA 2681282 A CA2681282 A CA 2681282A CA 2681282 A1 CA2681282 A1 CA 2681282A1
- Authority
- CA
- Canada
- Prior art keywords
- processing chamber
- steam
- material processing
- exhaust
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract 24
- 238000001035 drying Methods 0.000 title claims 2
- 239000000463 material Substances 0.000 claims abstract 87
- 238000010438 heat treatment Methods 0.000 claims abstract 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 12
- 239000003039 volatile agent Substances 0.000 claims abstract 3
- 238000004064 recycling Methods 0.000 claims 6
- 239000012530 fluid Substances 0.000 claims 5
- 238000007599 discharging Methods 0.000 claims 3
- 239000011261 inert gas Substances 0.000 claims 3
- 238000010791 quenching Methods 0.000 claims 3
- 230000000171 quenching effect Effects 0.000 claims 3
- 238000001816 cooling Methods 0.000 claims 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Processing Of Solid Wastes (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A method and apparatus for torrefaction of water containing cellulosic materials is performed in an inert atmosphere. The cellulosic material is cascaded through the apparatus between a plurality of rotatable trays vertically stacked within multiple processing zones. Steam being generated from heating of the cellulosic material is recycled back to the apparatus to provide an inert atmosphere. The steam may be superheated in a heat exchanger. Exhaust from the torrefaction zone of the apparatus has some moisture and other volatiles removed prior to being reheated in a burner. The heated exhaust is used in the heat exchanger to superheat the recycled steam.
Claims (34)
1. An apparatus for the torrefaction of water-containing cellulosic material within an inert atmosphere, said apparatus comprising, a material processing chamber having a plurality of processing zones adapted for processing water containing cellulosic material, a plurality of material supports arranged within said processing zones for receiving cellulosic material cascading within said chamber, said material processing chamber having a first outlet for the discharge of steam generated from processing the cellulosic material within said processing zones, and at least one inlet for recycling at least a portion of said steam into said material processing chamber, whereby said steam at least partially provides an inert atmosphere within said material processing chamber.
2. The apparatus of claim 1, further including a condenser arranged in fluid communication with said outlet of said material processing chamber through which said steam passes, said condenser adapted for removing water from said steam.
3. The apparatus of claim 1, further including a heat exchanger for heating said steam being recycled to said material processing chamber.
4. The apparatus of claim 3, wherein said heat exchanger superheats said steam.
5. The apparatus of claim 1, further including a condenser arranged in fluid communication with said first outlet of said material processing chamber through which a first portion of said steam being discharged from said first outlet passes, said condenser adapted for removing water from said steam, and a heat exchanger for heating a second portion of said steam being discharged from said first outlet and being recycled to said material processing chamber.
6. The apparatus of claim 5, further including a burner for heating said first portion of said steam to an elevated temperature for heating said second portion of said steam in said heat exchanger.
7. The apparatus of claim 1, wherein said material supports comprise a plurality of vertically stacked trays.
8. An apparatus for processing materials, the apparatus comprising:
a material processing chamber having an upper portion and a lower portion, a rotatable assembly within said chamber extending from the upper portion to the lower portion, said assembly including a plurality of vertically displaced material supports supported on a portion of said assembly;
a drive device for causing the material supports to rotate;
a first inlet at the upper portion of the material processing chamber adapted to receive material to be processed and to deposit the material at least partially onto at least one material support;
a first exhaust outlet for exiting exhaust steam generated within the material processing chamber;
a second inlet for recycling at least a portion of said exhaust steam into the material processing chamber, and wherein said material processing chamber is at least partially maintained under an inert atmosphere by the recycled exhaust steam; and a heat exchanger coupled between the first exhaust outlet and the second inlet for heating at least a portion of said exhaust steam, at least a portion of the heated exhaust steam recycled to the material processing chamber.
a material processing chamber having an upper portion and a lower portion, a rotatable assembly within said chamber extending from the upper portion to the lower portion, said assembly including a plurality of vertically displaced material supports supported on a portion of said assembly;
a drive device for causing the material supports to rotate;
a first inlet at the upper portion of the material processing chamber adapted to receive material to be processed and to deposit the material at least partially onto at least one material support;
a first exhaust outlet for exiting exhaust steam generated within the material processing chamber;
a second inlet for recycling at least a portion of said exhaust steam into the material processing chamber, and wherein said material processing chamber is at least partially maintained under an inert atmosphere by the recycled exhaust steam; and a heat exchanger coupled between the first exhaust outlet and the second inlet for heating at least a portion of said exhaust steam, at least a portion of the heated exhaust steam recycled to the material processing chamber.
9. The apparatus of claim 8, further comprising one or more fans within the material processing chamber.
10. The apparatus of claim 8, further comprising a third inlet at the lower portion of the material processing chamber for providing a fluid to the chamber for quenching the material being processed prior to discharge.
11. The apparatus of claim 8, further including a condenser for condensing water or volatiles within said exhaust steam.
12. The apparatus of claim 11 further including a burner arranged in fluid communication with said first exhaust outlet of said material processing chamber for heating at least a portion of said exhaust steam.
13. The apparatus of claim 8, wherein said heat exchanger is operative for superheating said exhaust steam.
14. The apparatus of claim 8,wherein said material supports comprise a plurality of vertically stacked trays.
15. A method for torrefaction of water-containing cellulosic material within an inert atmosphere, said method comprising:
cascading cellulosic material between a plurality of rotatable trays vertically stacked within a plurality of processing zones provided within a material processing chamber, heating said cellulosic material within said material processing chamber to generate steam from the contained water in said cellulosic material, discharging said steam generated from said cellulosic material from said material processing chamber, and recycling at least a portion of said steam to at least one of said processing zones within said material processing chamber, wherein said steam at least partially provides an inert atmosphere within said material processing chamber.
cascading cellulosic material between a plurality of rotatable trays vertically stacked within a plurality of processing zones provided within a material processing chamber, heating said cellulosic material within said material processing chamber to generate steam from the contained water in said cellulosic material, discharging said steam generated from said cellulosic material from said material processing chamber, and recycling at least a portion of said steam to at least one of said processing zones within said material processing chamber, wherein said steam at least partially provides an inert atmosphere within said material processing chamber.
16. The method of claim 15, wherein said material processing chamber includes a discharge outlet for cellulosic material processed within said plurality of processing zones, and a source of fluid for cooling the processed cellulosic material being discharged from said outlet.
17. The method of claim 15, further including a supply of inert gas coupled to said material processing chamber for maintaining said inert atmosphere.
18. The method of claim 15, further including heating said steam prior to recycling to said material processing chamber.
19. The method of claim 18, wherein said heating comprises passing at least a portion of said steam through a heat exchanger heated by another portion of said steam discharged from said material processing chamber.
20. The method of claim 15, further including condensing water or volatiles from said steam discharged from said material processing chamber.
21. A method for torrefaction of water-containing material within an inert atmosphere, said method comprising:
passing material to be torrefied between a plurality of material supports within a material processing chamber, heating said material within said material processing chamber to generate steam from the contained water within said material being processed, exhausting said steam from said material processing chamber, heating said steam exhausted from said material processing chamber, returning at least a portion of the heated steam to said material processing chamber, wherein said steam at least partially creates an inert atmosphere within said material processing chamber, and discharging torrefied material from said material processing chamber.
passing material to be torrefied between a plurality of material supports within a material processing chamber, heating said material within said material processing chamber to generate steam from the contained water within said material being processed, exhausting said steam from said material processing chamber, heating said steam exhausted from said material processing chamber, returning at least a portion of the heated steam to said material processing chamber, wherein said steam at least partially creates an inert atmosphere within said material processing chamber, and discharging torrefied material from said material processing chamber.
22. The method of claim 21, further including condensing at least a portion of said steam prior to returning said steam after heating to said material processing chamber.
23. The method of claim 21, wherein said material supports comprise a plurality of vertically stacked trays
24. The method of claim 21, wherein said heating said steam comprises superheating said steam.
25. The method of claim 21, further including supplying an inert gas to said material processing chamber to maintain said inert atmosphere.
26. The method of claim 21, further including quenching said material being discharged from said material processing chamber.
27. A method for processing material, comprising:
feeding material into a material processing chamber having an upper portion and a lower portion, and a rotatable assembly extending between said upper portion and said lower portion supporting a plurality of vertically displaced material supports;
applying heat within the upper portion of said material processing chamber for drying said material;
collecting exhaust from said material processing chamber;
recycling the collected exhaust to said processing chamber;
torrefying said material within the lower portion of said material processing chamber; and discharging said material from said material processing chamber.
feeding material into a material processing chamber having an upper portion and a lower portion, and a rotatable assembly extending between said upper portion and said lower portion supporting a plurality of vertically displaced material supports;
applying heat within the upper portion of said material processing chamber for drying said material;
collecting exhaust from said material processing chamber;
recycling the collected exhaust to said processing chamber;
torrefying said material within the lower portion of said material processing chamber; and discharging said material from said material processing chamber.
28. The method of claim 27, further comprising quenching the torrefied material.
29. The method of claim 27, wherein the recycled exhaust at least partially provides an inert atmosphere within said material processing chamber.
30. The method of claim 27, further including heating said exhaust before recycling to said material processing chamber.
31. The method of claim 30, further including using at least a portion of said exhaust from said material processing chamber for heating said exhaust to be recycled.
32. The method of claim 27, wherein said exhaust comprises steam.
33. The method of claim 32, wherein said material comprises water containing cellulosic material.
34. The method of claim 27, further including supplying an inert gas to said material processing chamber.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19509208P | 2008-10-03 | 2008-10-03 | |
| US61/195,092 | 2008-10-03 | ||
| US12/456,427 | 2009-06-15 | ||
| US12/456,427 US8161663B2 (en) | 2008-10-03 | 2009-06-15 | System and method for drying and torrefaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2681282A1 true CA2681282A1 (en) | 2010-04-03 |
| CA2681282C CA2681282C (en) | 2012-10-16 |
Family
ID=42062707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2681282A Active CA2681282C (en) | 2008-10-03 | 2009-09-30 | System and method for drying and torrefaction |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2681282C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8246788B2 (en) | 2010-10-08 | 2012-08-21 | Teal Sales Incorporated | Biomass torrefaction system and method |
| WO2013019111A1 (en) | 2011-08-01 | 2013-02-07 | Stichting Energieonderzoek Centrum Nederland | Use of torrefaction condensate |
-
2009
- 2009-09-30 CA CA2681282A patent/CA2681282C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8246788B2 (en) | 2010-10-08 | 2012-08-21 | Teal Sales Incorporated | Biomass torrefaction system and method |
| US8252966B2 (en) | 2010-10-08 | 2012-08-28 | Teal Sales Incorporated | Biomass torrefaction method |
| US9359556B2 (en) | 2010-10-08 | 2016-06-07 | Teal Sales Incorporated | Biomass torrefaction system and method |
| WO2013019111A1 (en) | 2011-08-01 | 2013-02-07 | Stichting Energieonderzoek Centrum Nederland | Use of torrefaction condensate |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2681282C (en) | 2012-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |