Canadian Patents Database / Patent 2909200 Summary

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(12) Patent: (11) CA 2909200
(54) English Title: PROCESS FOR PREPARING TORREFIED BIOMASS MATERIAL USING A COMBUSTIBLE LIQUID
(54) French Title: PROCEDE DE PREPARATION DE MATIERE DE BIOMASSE TORREFIEE UTILISANT UN LIQUIDE COMBUSTIBLE
(51) International Patent Classification (IPC):
  • C10L 5/44 (2006.01)
  • C10B 53/02 (2006.01)
  • C10L 9/08 (2006.01)
(72) Inventors (Country):
  • ADAMS, PAUL (Canada)
  • GOODWIN, JOHN (Canada)
  • TAYLOR, LARRY BRENT (Canada)
  • WIREN, BRENT (Canada)
  • MOON, JUNG (Canada)
(73) Owners (Country):
  • TORREFUSION TECHNOLOGIES INC. (Canada)
(71) Applicants (Country):
  • TORREFUSION TECHNOLOGIES INC. (Canada)
(74) Agent: SMART & BIGGAR
(45) Issued: 2016-09-20
(86) PCT Filing Date: 2014-07-17
(87) PCT Publication Date: 2015-01-22
Examination requested: 2015-10-09
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
61/847,399 United States of America 2013-07-17
61/953,519 United States of America 2014-03-14

English Abstract

A process for preparing torrefied densified biomass and/or torrefied densified biosolids comprising about 2% to about 25% w/w combustible liquid is disclosed. The process involves densifying biomass and/or biosolids, or providing a densified biomass and/or densified biosolids, and submerging the densified material in a hot combustible liquid for about 2 to about 120 minutes until the densified material is torrefied. The combustible liquid may be derived from any source exemplified by an oil such as those derived from plant, marine and animal sources, or alternatively, a petroleum product. The combustible liquid is heated to a temperature in the range of about 160° C to about 320° C prior to submersion of the densified biomass material. Also disclosed is a torrefied densified biomass and/or torrefied densified biosolid comprising about 2% to about 25% w/w combustible liquid.


French Abstract

L'invention porte sur un procédé de préparation de biomasse densifiée et torréfiée et/ou de biosolides densifiés et torréfiés, comprenant d'environ 2 % à environ 25 % p/p de liquide combustible. Le procédé comprend la densification de la biomasse et/ou des biosolides ou l'utilisation d'une biomasse densifiée et/ou de biosolides densifiés et l'immersion de la matière densifiée dans un liquide combustible chaud pendant environ 2 à environ 120 minutes jusqu'à ce que la matière densifiée soit torréfiée. Le liquide combustible peut être issu de n'importe quelle source illustrée par une huile telle que celles issues de plantes, de sources marines et animales ou, en variante, un produit pétrolier. Le liquide combustible est chauffé à un éventail de températures allant d'environ 160 °C à environ 320 °C avant l'immersion de la matière de biomasse densifiée. L'invention porte également sur une biomasse densifiée et torréfiée et/ou sur un biosolide densifié et torréfié qui comprend d'environ 2 % à environ 25 % p/p de liquide combustible.


Note: Claims are shown in the official language in which they were submitted.


65

CLAIMS

1. A continuous process for preparing a torrefied densified biomass
comprising the steps of:
(a) providing a supply of densified biomass material;
(b) submerging the densified biomass material in a combustible liquid;
(c) torrefying the densified biomass material in the combustible liquid at a
temperature or a
range of temperatures of about 270°C to about 320°C for a period
of time that is at least 10
minutes to about 120 minutes, to produce the torrefied densified biomass;
(d) conveying the torrefied densified biomass from the combustible fluid into
a water bath;
and
(e) recovering cooled torrefied densified biomass from the water bath;
wherein the torrefied densified biomass recovered at step (e) comprises no
more than about 20%
w/w water after 5 minutes of drip drying and comprises about 2% to about 20%
w/w of the
combustible liquid.
2. A continuous process for preparing a torrefied densified biomass
comprising the steps of:
(a) densifying a supply of a biomass feedstock to obtain a densified biomass
material;
(b) submerging the densified biomass material in a combustible liquid;
(c) torrefying the densified biomass material in the combustible liquid at a
temperature or a
range of temperatures of about 270°C to about 320°C for a period
of time that is at least 10
minutes to about 120 minutes, to produce the torrefied densified biomass;
(d) conveying the torrefied densified biomass from the combustible fluid into
a water bath;
and
(e) recovering cooled torrefied densified biomass from the water bath;
wherein the torrefied densified biomass recovered at step (e) comprises no
more than about 20%
w/w water after 5 minutes of drip drying and comprises about 2% to about 25%
w/w of the
combustible liquid.
3. The process of claim 1 or 2, wherein the densified biomass material is
in the form of pellets.
4. A continuous process for producing torrefied pellets comprising the
steps of:
(a) densifying a supply of a biomass feedstock and extruding therefrom
densified pellets;


66

(b) conveying the densified pellets into and through an input end of a
torrefusion reactor to
submerge the densified pellets in a combustible liquid contained within the
torrefusion
reactor, the combustible liquid having a temperature of about 270°C to
about 320°C;
(c) conveying the submerged densified pellets from the input end to an output
end of the
torrefusion reactor for a period of time that is at least 10 minutes to about
120 minutes,
wherein the densified pellets are torrefied;
(d) discharging the torrefied densified pellets from the output end of the
torrefusion reactor
and conveying the torrefied densified pellets into and through a cooler; and
(e) recovering cooled torrefied densified pellets from the cooler, the cooled
torrefied pellets
comprising about 2% to about 20% w/w of the combustible liquid;
wherein the cooler of step (d) is a water bath and washing of the torrefied
pellets by water in the
water bath removes residual combustible liquid from outer surfaces of the
torrefied pellets, and
wherein the cooled torrefied densified pellets recovered at step (e) have a
water content of no more
than about 20% w/w after 5 minutes of drip drying.
5. The process of claim 4, wherein the water that washes the pellets is
thereafter used to
desalinate a biomass feedstock.
6. The process of any one of claims 1 to 5, wherein thermal energy is
recovered from the
water bath.
7. The process of any one of claims 1 to 6, wherein supply for step (a) is
provided
continuously, semi-continuously or in batches.
8. The process of any one of claims 1 to 7, further comprising the steps
of:
(i) combining in a torgas heater, gases produced during step (c) and
combusting therein to
produced heated air; and
(ii) using the heated air to heat the combustible liquid.
9. The process of any one of claims 1 to 8, wherein the combustible liquid
is a plant- derived
oil.

67
10. The process of claim 9, wherein the plant-derived oil is canola oil,
linseed oil, sunflower
oil, safflower oil, corn oil, peanut oil, palm oil, soybean oil, rapeseed oil,
cottonseed oil, palm
kernel oil, coconut oil, sesame seed oil, olive oil, or a combination thereof.
11. The process of any one of claims 1 to 8, wherein the combustible liquid
is a petroleum-
based oil or a bitumen-based oil.
12. The process of claim 11, wherein the petroleum-based oil or a bitumen-
based oil is a
synthetic motor oil, a synthetic engine oil, a hydraulic fluid, a transmission
fluid, an automatic
transmission fluid, a chainsaw bar and chain oil, a gear oil, a diesel fuel, a
paraffin wax, or a
combination thereof.
13. The process of any one of claims 1 to 12, wherein the biomass is
derived from a plant
material.
14. The process of any one of claims 1 to 12, wherein the biomass comprises
wood waste from
wood-processing operations, sawdust, wood chips, straw, bagasse, waste streams
from plant
processing operations, processed from crops, or a combination thereof.
15. The process of any one of claims 1 to 12, wherein the biomass comprises
biosolids.
16. The process of any one of claims 1 to 15, wherein the torrefying in
step (c) is at a
temperature or range of temperatures from about 270°C to about
300°C.
17. The process of any one of claims 1 to 15, wherein the torrefying in
step (c) is at a
temperature or range of temperatures from about 270°C to about
290°C.
18. The process of any one of claims 1 to 15, wherein the torrefying in
step (c) is at a
temperature of about 270°C.
19. The process of any one of claims 1 to 15, wherein the torrefying in
step (c) is at a
temperature of about 280°C.
20. The process of any one of claims 1 to 15, wherein the torrefying in
step (c) is at a
temperature of about 290°C.

68
21. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is from at
least 10 minutes to about 90 minutes.
22. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is from at
least 10 minutes to about 60 minutes.
23. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is from at
least 10 minutes to about 30 minutes.
24. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is 10
minutes.
25. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is about 15
minutes.
26. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is about 20
minutes.
27. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is about 25
minutes.
28. The process of any one of claims 1 to 20, wherein the period of time in
step (c) is about 30
minutes.
29. The process of any one of claims 1 to 15, wherein one or both of:
(i) the period of time in step (c); and,
(ii) the temperature or range of temperatures in step (c),
is selected whereby the product recovered at step (e) has a water content of
about 1% to about 12%
(w/w) after 5 minutes of drip drying.
30. The process of any one of claims 1 to 15, wherein one or both of:
(i) the period of time in step (c); and,
(ii) the temperature or range of temperatures in step (c),
is selected whereby the product recovered at step (e) has a water content of
about 2% to about 10%
(w/w) after 5 minutes of drip drying.

69
31. The process of any one of claims 1 to 30, wherein one or both of:
(i) the period of time in step (c); and,
(ii) the temperature or range of temperatures in step (c),
is selected whereby the content of the combustible fluid in the product
recovered at step (e) is about
2% to about 20% (w/w).
32. The process of any one of claims 1 to 30, wherein one or both of:
(i) the period of time in step (c); and,
(ii) the temperature or range of temperatures in step (c),
is selected whereby the content of the combustible fluid in the product
recovered at step (e) is about
2% to about 15% (w/w).
33. The process of any one of claims 1 to 30, wherein one or both of:
(i) the period of time in step (c); and,
(ii) the temperature or range of temperatures in step (c),
is selected whereby the content of the combustible fluid in the product
recovered at step (e) is about
2% to about 10% (w/w).
34. The process of any one of claims 29 to 33, wherein one or both of (i)
and (ii) is selected
whereby said product has a carbon content on a bone dry basis of about 50% to
about 65% (w/w).
35. The process of any one of claims 29 to 33, wherein one or both of (i)
and (ii) is selected
whereby said product has a carbon content on a bone dry basis of about 54% to
about 63% (w/w).


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Admin Status

Title Date
(86) PCT Filing Date 2014-07-17
(87) PCT Publication Date 2015-01-22
(85) National Entry 2015-10-09
Examination Requested 2015-10-09
(45) Issued 2016-09-20

Maintenance Fee

Description Date Amount
Last Payment 2018-07-11 $100.00
Next Payment if small entity fee 2019-07-17 $100.00
Next Payment if standard fee 2019-07-17 $200.00

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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $200.00 2015-10-09
Filing $400.00 2015-10-09
Final $300.00 2016-07-15
Maintenance Fee - Application - New Act 2 2016-07-18 $100.00 2016-07-15
Maintenance Fee - Patent - New Act 3 2017-07-17 $100.00 2017-07-05
Maintenance Fee - Patent - New Act 4 2018-07-17 $100.00 2018-07-11

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Representative Drawing 2016-08-22 1 8
Cover Page 2016-08-22 2 50
Abstract 2015-10-09 2 79
Claims 2015-10-09 4 123
Drawings 2015-10-09 19 1,193
Description 2015-10-09 64 3,223
Representative Drawing 2015-10-09 1 12
Description 2015-10-10 65 3,283
Claims 2015-10-10 5 167
Cover Page 2015-12-30 1 45
Description 2016-03-21 65 3,290
Claims 2016-03-21 5 184
Correspondence 2016-07-15 3 99
Fees 2016-07-15 2 78
PCT 2015-10-09 2 73
Prosecution-Amendment 2015-10-09 10 388
Prosecution-Amendment 2015-11-17 1 28
Prosecution-Amendment 2015-12-21 3 241
Prosecution-Amendment 2016-03-21 9 410
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