Canadian Patents Database / Patent 2847386 Summary

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(12) Patent: (11) CA 2847386
(54) English Title: METHOD AND APPARATUS FOR TREATMENT OF MFT USING HYDROPHILIC DRAIN PLATES
(54) French Title: PROCEDE ET APPAREIL DE TRAITEMENT DE RESIDUS FINS MATURES UTILISANT DES PLAQUES DE DRAINAGE HYDROPHILES
(51) International Patent Classification (IPC):
  • C10C 3/08 (2006.01)
  • C10G 1/04 (2006.01)
(72) Inventors (Country):
  • MCLEOD, COLIN D. (Canada)
(73) Owners (Country):
  • DRY TAILINGS INCORPORATED (Canada)
(71) Applicants (Country):
  • MCLEOD, COLIN D. (Canada)
(74) Agent: MOFFAT & CO.
(45) Issued: 2014-12-09
(22) Filed Date: 2014-03-26
(41) Open to Public Inspection: 2014-06-09
Examination requested: 2014-03-26
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract

There is described an improved method and apparatus for the separation of bitumen from a slurry of mature fine tailing or MFT. The method includes suspending at least one vertically-oriented hydrophilic drain plate in a separation tank containing a pool of MFT at a starting position below the surface of the pool, removing the drain plate in a vertical direction out of the pool at a first, relatively fast, rate of speed, thereby causing a boundary layer of MFT to adhere to the sides of the drain plate. The drain plate is held a maximum point above the surface of the pool for a certain period of time, thereby allowing the boundary layer of MFT to begin draining back into the pool and allowing the suspended particles of bitumen contained within the boundary layer to reach a surface of the boundary layer and be deposited on the surface of the pool as the boundary layer drains back into the pool. The drain plate is then returned to the starting position at a second rate of speed that is relatively slower than the first rate of speed, and the bitumen particles deposited on the surface of the pool of MFT are removed using a hydrophobic roller system.


French Abstract

Un procédé et un appareil améliorés de séparation du bitume dans une bouillie de résidus fins matures ou RFM. Le procédé comprend de suspendre au moins une plaque de drainage hydrophile orientée à la verticale dans un réservoir de séparation qui contient une flaque de RFM à une position de départ sous la surface de la flaque, ce qui enlève verticalement la plaque de drainage hors de la flaque à une première vitesse relativement rapide; une couche limite de RFM se colle alors aux côtés de la plaque de drainage. La plaque de drainage est maintenue à un point maximal au-dessus de la surface de la flaque pendant un certain temps, ce qui permet ainsi à la couche limite de RFM de commencer à s'écouler de nouveau dans la flaque et aux particules de bitume suspendues contenues à même la couche limite d'atteindre une surface de la couche limite et d'être déposées à la surface de la flaque en même temps que la couche limite s'écoule de nouveau dans la flaque. La plaque de drainage est alors remise à la position de départ à une seconde vitesse relativement plus lente que la première, et les particules de bitume qui sont déposées à la surface de la flaque de RFM sont éliminées à l'aide d'un système hydrophile à billes.


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

CLAIMS
1. A method for treatment of MFT containing suspended particles of
bitumen, the method comprising:
suspending at least one vertically-oriented hydrophilic drain plate in a
separation tank containing a pool of MFT at a starting position;
removing a portion of the at least one drain plate out of the pool of MFT
at a first rate of speed, thereby causing a boundary layer of MFT to adhere to
the portion of the
drain plate removed out of the pool;
holding the portion of the at least one drain plate at a maximum point
above a surface of the pool for a predetermined period of time, thereby
allowing the boundary
layer of MFT to begin draining back into the pool and allowing the suspended
particles of
bitumen contained within the boundary layer of MFT to reach a surface of the
boundary layer of
MFT and be deposited on the surface of the pool as the boundary layer of MFT
drains back
into the pool;
returning the portion of the at least one drain plate to the starting
position at a second rate of speed; and
removing the bitumen particles deposited on the surface of the pool of
MFT.
2. The method of claim 1, wherein the starting position is below the
surface
of the pool of MFT.

3. The method of claim 1 or 2, wherein the step of removing a portion of
the at least one drain plate out of the pool is accomplished by moving the
drain plate relative to
the pool.
4. The method of claim 1 or 2, wherein the step of removing a portion of
the at least one drain plate out of the pool is accomplished by moving the
pool relative to the
drain plate.
5. The method of claim 4, wherein moving the pool relative to the at least
one drain plate is accomplished by raising and lowering the separation tank
containing the pool
of MFT.
6. The method of claim 4, wherein moving the pool relative to the at least
one drain plate is accomplished by increasing and decreasing the volume of the
MFT in the
pool.
7. The method of any one of claims 1 to 6, wherein the first rate of speed
is
relatively faster than the second rate of speed.
8. The method of any one of claims 1 to 7, wherein the at least one
hydrophilic drain plate is constructed from a material chosen from the group
of materials
consisting of wood, cotton, cement, epoxy, paint, plastic and combinations
thereof.
26

9. The method of any one of claims 1 to 8, wherein top and bottom edges
of the at least one drain plate are aerodynamically shaped to reduce rupturing
of the
suspended particles of bitumen in the pool of MFT.
10. The method of any one of claims 1 to 9, wherein the step of removing
the bitumen particles deposited on the surface of the pool of MFT in the
separation tank
comprises the further steps of:
causing the bitumen particles deposited on the surface of the pool of
MFT in the separation tank to overflow an outlet edge of the separation tank
into a collection
tank thereby forming a layer of bitumen particles on a surface of processed
MET in the
collection tank; and
removing the layer of bitumen particles on the surface of the processed
MFT in the collection tank using a hydrophobic roller.
11. The method of claim 10, wherein the bitumen particles deposited on the
surface of the pool of MFT in the separation tank are caused to overflow the
outlet edge of the
separation tank by an inflow of MFT into the separation tank.
12. The method of claim 10 or 11, further comprising the step of adjusting
the temperature of an outer surface of the hydrophobic roller to assist in
bonding the layer of
bitumen particles on the surface of the processed MFT in the collection tank
with the outer
surface of the hydrophobic roller.
27

13. The method of claim 12, wherein the temperature of the outer surface of

the hydrophobic roller is controlled by a thermal fluid circulating through
the hydrophobic roller.
14. The method of any one of claims 10 to 13, further including the step of

rotating at least one drive roller positioned below the surface of the
processed MFT in the
collection tank to drive the layer of bitumen particles on the surface of the
processed MFT in
the collection tank toward the hydrophobic roller.
15. The method of claim 14, wherein the drive roller is positioned near an
inlet edge of the collection tank and wherein the inlet edge of the collection
tank is positioned
adjacent the outlet edge of the separation tank.
16. The method of any one of claims 10 to 15, further including the step of

removing the processed MFT from the collection tank by overflowing a drain
edge of the
collection tank.
17. The method of claim 16, wherein the hydrophobic roller is located in
the
collection tank, adjacent the drain edge.
18. The method of any one of claims 9 to 17, wherein the hydrophobic roller

includes an air knife to remove residual processed MFT off the hydrophobic
roller.
19. An apparatus for treatment of MFT containing suspended particles of
bitumen, the apparatus comprising:
28

a separation tank for holding a pool of MFT;
at least one hydrophilic drain plate suspended vertically within the
separation tank at a starting position;
removal means for removing a portion of the at least one drain plate out
of the pool of MFT at a first rate of speed, thereby causing a boundary layer
of MFT to adhere
to the portion of the at least one drain plate removed out of the pool;
holding means for holding the portion of the at least one drain plate at a
maximum point above a surface of the pool for a predetermined period of time,
thereby
allowing the boundary layer of MFT to begin draining back into the pool and
allowing the
suspended particles of bitumen contained within the boundary layer of MFT to
reach a surface
of the boundary layer and be deposited on the surface of the pool as the
boundary layer of
MFT drains back into the pool;
return means for returning the at least one drain plate to the starting
position at a second rate of speed; and
bitumen collection means for removing and collecting the bitumen
particles deposited on the surface of the pool of MFT.
20. The apparatus of claim 19, wherein the starting position is below the
surface of the pool of MFT.
21. The apparatus of claim 19 or 20, wherein the removal means moves the
at least one drain plate relative to the pool.
29

22 The apparatus of claim 19 or 20, wherein the removal means
moves the
pool relative to the at least one drain plate.
23 The apparatus of claim 22, wherein the removal means lowers
the
separation tank containing the pool of MFT.
24. The apparatus of claim 22, wherein the removal means decreases the
volume of the MFT in the pool.
25. The apparatus of any one of claims 19 to 24, wherein the first rate of
speed is relatively faster than the second rate of speed.
26. The apparatus of any one of claims 19 to 25, wherein the at least one
hydrophilic drain plate is constructed from a material chosen from the group
of materials
consisting of wood, cotton, cement, epoxy, paint, plastic and combinations
thereof.
27. The apparatus of any one of claims 19 to 26, wherein top and bottom
edges of the at least one drain plate are aerodynamically shaped to reduce
rupturing of the
suspended particles of bitumen in the pool of MFT.
28. The apparatus of any one of claims 19 to 27, wherein the bitumen
collection means for removing and collecting the bitumen particles deposited
on the surface of
the pool of MFT in the separation tank comprises:
a collection tank located adjacent the separation tank;

means for causing the bitumen particles deposited on the surface of the
pool of MFT in the separation tank to overflow an outlet edge of the
separation tank into the
collection tank thereby forming a layer of bitumen particles on a surface of
processed MFT in
the collection tank; and
a hydrophobic roller located in the collection tank for removing the layer
of bitumen particles on the surface of the processed MFT in the collection
tank.
29. The apparatus of claim 28, further comprising a pump for pumping MFT
into the separation tank thereby causing the bitumen particles deposited on
the surface of the
pool of MFT in the separation tank to overflow the outlet edge of the
separation tank into the
collection tank.
30. The apparatus of claim 28 or 29, wherein the hydrophobic roller
comprises a temperature control system for controlling the temperature of an
outer surface of
hydrophobic roller to assist in bonding the layer of bitumen particles on the
surface of the
processed MFT in the collection tank with the outer surface of the hydrophobic
roller.
31. The apparatus of claim 30, wherein the temperature control system
includes a thermal fluid circulating through the hydrophobic roller.
32. The apparatus of any one of claims 28 to 31, further comprising at
least
one drive roller positioned for rotation below the surface of the processed
MFT in the collection
tank for driving the layer of bitumen particles on the surface of the
processed MFT in the
collection tank toward the hydrophobic roller.

31

33. The apparatus of claim 32, wherein the at least one drive roller is
positioned near an inlet edge of the collection tank and wherein the inlet
edge of the collection
tank is positioned adjacent the outlet edge of the separation tank.
34. The apparatus of any one of claims 28 to 33, wherein the collection
tank
includes a drain edge for removal of the processed MFT from the collection
tank by overflowing
the drain edge of the collection tank.
35. The apparatus of claim 34, wherein the hydrophobic roller is located
adjacent the drain edge of the collection tank.
36. The method of any one of claims 28 to 35, wherein the hydrophobic
roller includes an air knife to remove residual processed MFT off the
hydrophobic roller.

32


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Admin Status

Title Date
(22) Filed 2014-03-26
Examination Requested 2014-03-26
(41) Open to Public Inspection 2014-06-09
(45) Issued 2014-12-09

Maintenance Fee

Description Date Amount
Last Payment 2017-12-12 $50.00
Next Payment if small entity fee 2019-03-26 $100.00
Next Payment if standard fee 2019-03-26 $200.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $400.00 2014-03-26
Filing $200.00 2014-03-26
Final $150.00 2014-09-08
Maintenance Fee - Patent - New Act 2 2016-03-29 $50.00 2016-03-16
Maintenance Fee - Patent - New Act 3 2017-03-27 $50.00 2016-12-13
Registration of Documents $100.00 2017-06-14
Maintenance Fee - Patent - New Act 4 2018-03-26 $50.00 2017-12-12

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Abstract 2014-03-26 1 25
Description 2014-03-26 24 907
Claims 2014-03-26 8 206
Drawings 2014-03-26 9 184
Cover Page 2014-05-23 1 37
Drawings 2014-08-01 9 185
Description 2014-08-01 24 903
Cover Page 2014-11-25 1 37
Prosecution-Amendment 2014-08-01 5 137
Prosecution-Amendment 2014-07-02 1 27
Prosecution-Amendment 2014-07-23 2 81
Correspondence 2014-09-08 1 49
Fees 2016-03-16 1 58
Fees 2016-12-13 1 62
Fees 2017-12-12 1 62